Metrological regulation for load cells

Metrological regulation for load cells — Test report format Metrological regulation for load cells Test report format Part 3 Часть 3 Réglementation métrologique des cellules de pesée — Format du rapport d’essais Réglementation métrologique des cellules de pesée Format du rapport d’essais Partie 3 OIML R 60-360 International Organization of Legal Metrology OIML

committee International Organization of Legal Metrology Instruments for measuring mass and density TC 9TC 9Agency International Organization of Legal Metrology International Organization of Legal Metrology OIML

committee International Organization for Standardization Instruments for measuring mass and density TC 9TC 9ISO2

2021-10-01

en60602021 International Organization of Legal Metrology OIML

international-standardiso

OIML 60

International Standard

true

international-recommendation

2013

degree Celsius °C

°C

minute min

\min

gram g

g

kilogram kg

kg

tonne t

t

kPa kPa

kPa

mV*V^-1 mV V ⁻¹

mV V^{- 1}

ohm Ω

Ω

metre m

m

kV kV

kV

MHz MHz

MHz

volt per meter V m ⁻¹

V m^{- 1}

kHz kHz

kHz

second s

s

time duration mass electric resistance electric field strength kilo k k k k milli m m m m mega M M M M

Bureau International de Métrologie Légale
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Telephone: 33 (0)1 48 78 12 82
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OIML Publications may be downloaded from the OIML web site in the form of PDF files. Additional information on OIML Publications may be obtained from the Organisation’s headquarters:

Bureau International de Métrologie Légale
11, rue Turgot – 75009 Paris – France
Telephone: 33 (0)1 48 78 12 82
Fax: 33 (0)1 42 82 17 27
E-mail:
Internet: www.oiml.org

Foreword

The International Organisation of Legal Metrology (OIML) is a worldwide, intergovernmental organisation whose primary aim is to harmonise the regulations and metrological controls applied by the national metrological services, or related organisations, of its Member States. The main categories of OIML publications are:

International Recommendations (OIML R), which are model regulations that establish the metrological characteristics required of certain measuring instruments and which specify methods and equipment for checking their conformity. OIML Member States shall implement these Recommendations to the greatest possible extent;
International Documents (OIML D), which are informative in nature and which are intended to harmonise and improve work in the field of legal metrology;
International Guides (OIML G), which are also informative in nature and which are intended to give guidelines for the application of certain requirements to legal metrology;
International Basic Publications (OIML B), which define the operating rules of the various OIML structures and systems; and

OIML Draft Recommendations, Documents and Guides are developed by Project Groups linked to Technical Committees or Subcommittees which comprise representatives from OIML Member States. Certain international and regional institutions also participate on a consultation basis. Cooperative agreements have been established between the OIML and certain institutions, such as ISO and the IEC, with the objective of avoiding contradictory requirements. Consequently, manufacturers and users of measuring instruments, test laboratories, etc. may simultaneously apply OIML publications and those of other institutions.

International Recommendations, Documents, Guides and Basic Publications are published in English (E) and translated into French (F) and are subject to periodic revision.

Additionally, the OIML publishes or participates in the publication of Vocabularies (OIML V) and periodically commissions legal metrology experts to write Expert Reports (OIML E). Expert Reports are intended to provide information and advice, and are written solely from the viewpoint of their author, without the involvement of a Technical Committee or Subcommittee, nor that of the CIML. Thus, they do not necessarily represent the views of the OIML.

This publication — reference OIML R 60-3:2021 — is an updated edition (developed by the OIML Certification System Management Committee) of R 60-3:2017 (developed by Project Group 1 of OIML Technical Committee TC 9 Instruments for measuring mass and density). This updated edition consolidates the Amendment (2019-12-23) to R 60:2017, and includes other editorial and minor technical changes. It was approved for final publication by the International Committee of Legal Metrology at its 56th meeting in October 2021 and was sanctioned by the 16th International Conference on Legal Metrology in 2021. It supersedes the previous edition of R 60 dated 2017.

OIML Publications may be downloaded from the OIML web site in the form of PDF files. Additional information on OIML Publications may be obtained from the Organisation’s headquarters:

Bureau International de Métrologie Légale
11, rue Turgot — 75009 Paris — France
Telephone: 33 (0)1 48 78 12 82
Fax:33 (0)1 42 82 17 27
E-mail:biml@oiml.org
Internet: www.oiml.org

Introduction

This Report Format applies to any kind of load cell (independent of its technology). It presents a standardised format for the results of the various tests and examinations, described in OIML R 60-2, to which a type of load cell shall be submitted for the purpose of its approval based on this OIML Recommendation.

It is recommended that all metrology services or laboratories evaluating and/or testing types of load cells according to OIML R 60-1, or to national or regional regulations based on this Recommendation, use this Report Format, directly or after translation into a language other than English or French. In the case of a translation, it is highly recommended to leave the structure and the numbers of the clauses unchanged: in this case, most of the content is also understandable for those who cannot read the language of the translation.

Some of the tests may have to be repeated several times and reported using several identical sheets; therefore, report pages must be numbered in the space provided at the top of each page, completed by the indication of the total number of pages.

In the practical application of the Report Format, in addition to a cover page by the Issuing Authority, as a minimum, clauses A-F (as necessary) shall be included.

Applicability of this Report Format

In the framework of OIML B 18 Framework for the OIML Certification System (OIML-CS) [6] applicable to load cells in conformity with OIML R 60-1 and R 60-2, use of this Report Format is mandatory, in French and/or in English with translation into the national languages of the countries issuing such certificates, if appropriate.

Implementation of this Report Format is informative with regard to the implementation of OIML R 60-1 and R 60-2 in national regulations.

Calculation procedures

In order to facilitate a comparison of the reports established in English and in French, the same abbreviations (those of the English language) are used in both versions; the meanings of these abbreviations are given whenever appropriate.

In testing and evaluating load cells for type evaluation, it is recognised that the test apparatus and practices used by the various laboratories will be different. OIML R 60 allows for these variations and still provides a method for testing, recording and calculating results that are readily understandable by other knowledgeable parties reviewing the data.

In order to achieve this ease of comparability it is necessary that those persons conducting the tests use a common system for recording data and calculating results.

Thus, it is essential that the calculation procedures below be reviewed and followed closely in the completion of this test report.

Load cell errors (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> <mo>=</mo> </mstyle> </math><asciimath>E_L =</asciimath></stem> Error Load test)

Complete a for each test temperature, calculate the averages and record in the right-hand column. When five runs are necessary, use .

Determine the conversion factor, $f$ f, which is the number of indicated units per load cell verification interval, $v$ v, and is used to convert all “indicated units” to “ $v$ v”. It is determined from the test data averages of the increasing load tests at the initial $20 °C$ 20 "unitsml(degC)" nominal test temperature.

If a test load corresponding to 75 % of the measuring range for the load cell under test (i.e. $2250$ 2250 divisions for a $3000$ 3000 division cell, which is $D_{min}$ D_{"min"} plus 75 % of the difference between $D_{max}$ D_{"max"} and $D_{min}$ D_{"min"}) is not included in the test loads used in , interpolate between the adjacent upper and lower values of the averages of all three test runs and record in (see R 60-2, 2.8.2).

Calculate the difference between the average indication on the increasing load test runs at 75 % of the difference between $D_{max}$ D_{"max"} and $D_{min}$ D_{"min"} and the indication at $D_{min}$ D_{"min"}. Divide the result (to five significant figures) by the number of verification intervals (75 % of $n$ n) for that load to obtain the conversion factor, $f$ f, and record in the tables that follow.

f = \frac{average indication at 0.75 \cdot (D_{max} - D_{min}) - indication at D_{min}}{0.75 \cdot n}

f = {"average indication at" quad 0.75 cdot (D_{"max"} - D_{"min"}) - "indication at" quad D_{"min"}} / {0.75 cdot n}

The units of conversion factor, $f$ f, are indicated units (e.g. digits or counts) per load cell verification interval, $v$ v.

Enter the average test indications of the tests at the temperatures following the initial test at a nominal $20 °C$ 20 "unitsml(degC)" in . In recording this data, indicate a “no test load” indication (at $D_{min}$ D_{"min"}) as “0”. This may require subtracting the “no load indication at $D_{min}$ D_{"min"}” from the “test load indication” so that the first entry in the column is “0”. These “0’s” have been preprinted on the form to clarify that a dead load condition is recorded as “0”.

Calculate the reference indication, $R_{i}$ R_{"i"}, by converting the net test load, in mass units, to indicated units (e.g. counts or digits), by multiplying by the conversion factor, $f$ f, for each test load and recording in the 2nd column in .

R_{i} = \frac{(test load i - D_{min})}{(D_{max} - D_{min})} \cdot n \cdot f

R_i = {("test load" quad i - D_{"min"})} / {(D_{"max"} - D_{"min"})} cdot n cdot f

In calculate the difference between the average test indication and the reference indication for each test load at each test temperature and divide the result by the conversion factor, $f$ f, to obtain the error, $E_{L}$ E_{"L"}, for each test load in terms of $v$ v.

E_{L} = (average test indication for test load i - reference indication R_{i}) / f

E_L = ("average test indication for test load" quad i - "reference indication" quad R_i) // f

Compare $E_{L}$ E_{"L"} with the corresponding MPE for each test load.

Repeatability error (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>R</mi> </msub> </mstyle> </math><asciimath>E_R</asciimath></stem> in terms of verification interval, <stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <mi>v</mi> </mstyle> </math><asciimath>v</asciimath></stem>)

Enter data in .

Calculate the maximum difference between the test indications on Form 6.3 and divide it by $f$ f to obtain the repeatability error, $E_{R}$ E_{"R"}, in terms of the load cell verification interval, $v$ v.

E_{R} = (maximum indication of the test load - minimum indication) / f

E_R = ("maximum indication of the test load" - "minimum indication") // f

Compare $E_{R}$ E_{"R"} with the absolute value of the corresponding MPE for each test load.

Temperature effects on minimum dead load output (MDLO) (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mi>M</mi> </msub> <mo>=</mo> </mstyle> </math><asciimath>C_M =</asciimath></stem> Change MDLO)

Enter in the average indication for the initial minimum test load, $D_{min}$ D_{"min"}, for each test temperature from .

Calculate the difference between the average test indications for each temperature $T_{i}$ T_{"i"} in sequence and divide the result by the conversion factor, $f$ f, to obtain the change in terms of the load cell verification interval, $v$ v.

C_{M} = (average test indication at T_{2} - average indication at T_{1}) / f

C_{"M"} = ("average test indication at" quad T_2 - "average indication at" quad T_1) // f

Divide $C_{M}$ C_{"M"} by ( $T_{2} - T_{1}$ T_2 - T_1) and multiply the result by a factor $T_{f} = 5$ T_{"f"} = 5 for class B, C, and D load cells or $T_{f} = 2$ T_{"f"} = 2 for class A load cells. This gives the change in $v$ v per $5 °C$ 5 "unitsml(degC)" for class B, C, and D load cells or in $v$ v per $2 °C$ 2 "unitsml(degC)" for class A load cells.

Multiply the result by $[(D_{max} - D_{min}) / n / v_{min}$ [(D_{"max"} - D_{"min"}) // n // v_{"min"}] to give the final result $C_{M} (v_{min})$ C_{"M"}( v_{"min"}) in units of $v_{min}$ v_{"min"} per $5 °C$ 5 "unitsml(degC)" for class B, C, and D load cells, or in units of $v_{min}$ v_{"min"} per $2 °C$ 2 "unitsml(degC)" for class A load cells. $C_{M} (v_{min})$ C_{"M"}(v_{"min"}) must not exceed $p_{LC}$ p_{"LC"}.

C_{M} (v_{min}) = | \frac{C_{M} \cdot T_{f}}{(T_{2} - T_{1})} \times \frac{(D_{max} - D_{min})}{n \cdot v_{min}} |

bb(C_M(v_{"min"}) = | {C_M cdot T_f}/{(T_2 - T_1)} xx {(D_{"max"} - D_{"min"})} / {n cdot v_{"min"}} |)

C_{M} (v_{min}) \leq p_{L C}

C_M(v_{"min"}) <= p_{LC} Creep magnitude <stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mi>C</mi> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mstyle> </math><asciimath>C_C(t)</asciimath></stem> and minimum dead load output return (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mtext>DR</mtext> </msub> </mstyle> </math><asciimath>C_{"DR"}</asciimath></stem>)

( $C_{C} (t) =$ C_C(t) = Creep, expressed in terms of the load cell verification interval, $v$ v)

( $C_{D} R = D R$ C_DR = DR, expressed in terms of the load cell verification interval, $v$ v)

Remark: Contrary to the minimum dead load output return $D R$ DR in terms of mass the minimum dead load output $C_{D} R$ C_DR is expressed in terms of the verification interval, $v$ v.

From the test indications recorded in , calculate the difference between the initial indication obtained at the minimum creep test load after the stabilisation period and any indication obtained over the 30 minute test period with the maximum creep test load of 90 % to 100 % of $E_{max}$ E_{"max"} and divide by the conversion factor, $f$ f.

C_{C} (t) = (indication - initial indication) / f

C_C (t) = ("indication" - "initial indication") // f

Remark: If the minimum creep test load or the maximum creep test load differ from $D_{min}$ D_{"min"} or $D_{max}$ D_{"max"} according to “Load cell errors $E_{L}$ E_{"L"}” the conversion factor, $f$ f, must be recalculated with the minimum and maximum creep test loads (see ).

$C_{C} (t)$ C_{"C"}(t) must not exceed 0.7 times the absolute value of the MPE for the maximum creep test load at any time $t$ t over the 30 minute creep test period.

Calculate the difference between the test indications obtained at $t = 20$ t = 20 minutes and $t = 30$ t = 30 minutes after the initial indication at $t = t_{0}$ t = t_0 and divide by $f$ f to obtain the creep error, $C_{C} (30 - 20)$ C_{"C"} (30 - 20), in terms of the load cell verification interval, $v$ v.

C_{C} (30 - 20) = (indication at time t = 30 minutes - indication at time t = 20 minutes) / f

C_{"C"} (30 - 20) = ("indication at time" quad t = 30 quad "minutes" - "indication at time" quad t = 20 quad "minutes") // f

$C_{C} (30 - 20)$ C_C (30 - 20) shall not exceed 0.15 times the absolute value of the MPE for the applied load.

Calculate the difference between the initial indication obtained at the minimum creep test load after the stabilisation period ( $t_{0} = 0 \min$ t_0 = 0 "unitsml(min)") and the indication at the minimum creep test load after the creep test and after a time interval for stabilisation ( $t > 30 \min$ t > 30 "unitsml(min)") and divide the result by conversion factor, $f$ f, to obtain the minimum dead load output return, $C_{DR}$ C_{"DR"}, in terms of $v$ v.

C_{DR} = (minimum test load indication 2 - minimum test load indication 1) / f

C_{"DR"} = ("minimum test load indication"2 - "minimum test load indication"1) // f

If the time intervals specified in R 60-2, Table 1 have been met, $C_{DR}$ C_{"DR"} must not exceed 0.5 $v$ v.

If the actual time is between 100 % and 150 % of the specified time in R 60-2, Table 1, then the following applies:

C_{DR} \leq 0.5 (1 - (x - 1)) v

C_{"DR"} <= 0.5 (1 - (x - 1)) v

with

$x =$ x = actual time/specified time

Whereas $C_{DR}$ C_{"DR"} expresses the minimum dead load output return in terms of $v$ v, the value of $D R$ DR as used in OIML R 76 [1] is expressed in units of mass ( $g$ "unitsml(g)", $kg$ "unitsml(kg)" or $t$ "unitsml(t)").

Calculate the minimum dead load output return, $D R$ DR, expressed in units of mass ( $g$ "unitsml(g)", $kg$ "unitsml(kg)" or $t$ "unitsml(t)") as follows: $D R_{=} (E_{max} - E_{min}) C_{DR} / n_{LC}$ DR_ = (E_{"max"} - E_{"min"}) C_{"DR"} // n_{"LC"}

Regardless of the value declared by the manufacturer for the apportionment factor, $p_{LC}$ p_{"LC"}, the MPE for creep shall be determined from R 60-1, Table 4 using the apportionment factor, $p_{LC} = 0.7$ p_{"LC"} = 0.7 (see R 60-1, 5.5.1).

Barometric pressure effects<fn id="_c38f5048-7cd5-7cef-9e1e-aadd422192c1" reference="1">This test may not be necessary depending on the design of the load cell. </fn> (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mi>P</mi> </msub> <mo>=</mo> </mstyle> </math><asciimath>C_P =</asciimath></stem> Change due to barometric pressure)

From the test indications recorded in R 60-3, , calculate the difference between the indications for each pressure and divide the result by conversion factor, $f$ f, to obtain the change, $C_{P}$ C_{"P"}, in terms of $v$ v.

C_{P} = (indication at P_{2} - indication at P_{1}) / f

C_P = ("indication at " P_2 - "indication at " P_1) // f

Divide $C_{P}$ C_{"P"} by ( $P_{2} - P_{1}$ P_2 - P_1) to determine the change due to barometric pressure in terms of $v$ v per kilopascal ( $kPa$ "unitsml(kPa)").

Multiply the result by [ $(E_{max} - E_{min}) / n_{LC}$ (E_{"max"} - E_{"min"}) // n_{"LC"} to obtain the result in units of mass (g, kg, or t) per $kPa$ "unitsml(kPa)" (as stated by the manufacturer). The result must not exceed $v_{min}$ v_{"min"}.

C_{P} (v) = \frac{C_{P}}{(P_{2} - P_{1})} \cdot \frac{(E_{max} - E_{min})}{n_{max}} \leq v_{\min}

C_P(v) = C_P/{(P_2 - P_1)} cdot {(E_{"max"} - E_{"min"})}/n_{"max"} <= v_min Humidity effects<fn id="_57a18717-ec74-ca97-eec0-f55051621336" reference="2">This test is not necessary if the load cell is marked NH or SH. </fn> (CH or no mark)

( $C_{Hmin} =$ C_{"Hmin"} = Change in terms of $v$ v due to Humidity effect on the indication of the minimum test load $D_{min}$ D_{"min"})

( $C_{Hmax} =$ C_{"Hmax"} = Change due to Humidity effect on the indication of the maximum test load $D_{max}$ D_{"max"})

Remark: If the minimum or maximum test load used for this test differ from the minimum test load $D_{min}$ D_{"min"} or maximum test load $D_{max}$ D_{"max"} according to R 60-3, 2.1.2 “Load cell errors $E_{L}$ E_{"L"}” the conversion factor, $f$ f, must be recalculated with the minimum and maximum test loads of this test (see R 60-3, 2.1.2.4).

From the test indications recorded in R 60-3, Table 6.10.1, calculate the difference between the initial indications for the minimum test load, $D_{min}$ D_{"min"}, before and after the damp heat test and divide the result by conversion factor, $f$ f, to obtain the change, $C_{Hmin}$ C_{"Hmin"}, in terms of verification interval, $v$ v (see R 60-1, 5.6.3.1).

C_{Hmin} = [{(indication at D_{min})}_{after} - {(indication at D_{min})}_{before}] / f

C_{"Hmin"} = [("indication at " D_{"min"})_{"after"} - ("indication at " D_{"min"} )_{"before"}] // f

C_{Hmin} must not exceed 0.04 \cdot n .

C_{"Hmin"} " must not exceed 0.04 " cdot n.

Calculate the average indications $\bar{I} {D_{max}}$ bar I{D_{"max"}} and $\bar{I} {D_{min}$ bar I{D_{"min"} at $D_{min}$ D_{"min"} (see R 60-2, 2.10.5) for the required number of test indications, before and after the damp heat test. Subtract $\bar{I} {D_{min}$ bar I{D_{"min" from $\bar{I} {D_{max}}$ bar I{D_{"max"}} for the tests before and after damp heat test and then calculate the difference between the results. Divide the result by the conversion factor, $f$ f, to obtain the change, $C_{Hmax}$ C_{"Hmax"} in terms of $v$ v.

C_{Hmax} = \frac{[{(\bar{I} {D_{max}} - \bar{I} {D_{min}})}_{after} - {(\bar{I} {D_{max}} - \bar{I} {D_{min}})}_{before}]}{f}

C_{"Hmax"} = {[(bar I{D_{"max"}} - bar I{D_{"min"}})_{"after"} - (bar I{D_{"max"}} - bar I{D_{"min"}})_{"before"}]} / f

$C_{Hmax}$ C_{"Hmax"} must not exceed the MPE (see R 60-1, Table 4 in 5.3.2).

Humidity effects<fn id="_8af58933-f298-54e6-4bd7-b54692deb818" reference="3">This test is not necessary if the load cell is marked NH or CH or has no humidity marking. </fn> (SH)

Report load test errors at different temperatures and humidity conditions using R 60-3, Forms 6.3, then indicate the results in R 60-3, Table 6.10.2 utilising the procedure contained within “load cell errors” procedure, R 60-3, 2.1.2, in a manner similar to that used for the preparation of R 60-3, Table 6.5.

Additional tests for digital load cells Warm-up time

Enter data on R 60-3, Form 6.11 (Warm-up time).

Span is the result of subtraction of the indication at the minimum test load, $D_{min}$ D_{"min"}, from the indication at the maximum test load, $D_{max}$ D_{"max"}.

Change is the difference between the span and the initial run span.

Power voltage variations

Enter data on R 60-3, Form 6.12.

Perform load tests and record results utilising R 60-3, Form 6.12.

Calculate reference indications in accordance with the “load cell errors” procedure, R 60-3, 2.1.2.

Indicate results on R 60-3, Form 6.12.

Short-time power reductions

Enter data on R 60-3, Form 6.13.

Calculate the difference, which is:

difference = \frac{(indication with disturbance, in units - indication without disturbance, in units)}{conversion factor, f}

"difference" = {("indication with disturbance, in units" - "indication without disturbance, in units")} / {"conversion factor", f}

Indicate results on R 60-3, Form 6.13.

Bursts (electrical fast transients)

Enter data on R 60-3, Forms 6.14.1 and 6.14.2.

Indicate results on R 60-3, Forms 6.14.1 and 6.14.2.

Surge

Enter data on R 60-3, Forms 6.15

difference = \frac{(indication with disturbance, in units - indication without disturbance, in units)}{conversion factor, f}

"difference" = {("indication with disturbance, in units" - "indication without disturbance, in units")} / {"conversion factor, " f}

Indicate results on R 60-3, Forms 6.15

Electrostatic discharge

Enter data on R 60-3, Forms 6.16.1, 6.16.2 and 6.16.3.

Calculate the difference, which is:

difference = \frac{(indication with disturbance, in units - indication without disturbance, in units)}{conversion factor, f}

"difference" = {("indication with disturbance, in units" - "indication without disturbance, in units")} / {"conversion factor", f}

Indicate results on R 60-3, Forms 6.16.1, 6.16.2.1, and 6.16.2.2.

Provide test point information on Form 6.16.3.

Electromagnetic susceptibility

Enter data on R 60-3, Form 6.17.1.

Calculate the difference, which is:

difference = \frac{(indication with disturbance, in units - indication without disturbance, in units)}{conversion factor, f}

"difference" = {("indication with disturbance, in units" - "indication without disturbance, in units")} / {"conversion factor", f}

Indicate results on R 60-3, Form 6.17.1.

Provide test set-up information on R 60-3, Form 6.17.2.

Immunity to conducted electromagnetic fields

Enter data on R 60-3, Form 6.18.

Calculate the difference, which is:

difference = \frac{(indication with disturbance, in units - indication without disturbance, in units)}{conversion factor, f}

"difference" = {("indication with disturbance, in units" - "indication without disturbance, in units")} / {"conversion factor", f}

Indicate results on R 60-3, Form 6.18.

Provide test setup information on R 60-3, Form 6.18.

Span stability

Enter data on R 60-3, Forms 6.19.1 (3 runs) to 6.19.2 (5 runs).

Calculate averages and record on R 60-3, Forms 6.19.1 (3 runs) to 6.19.2 (5 runs).

Indicate results on R 60-3, Form 6.19.3

General notes

Absolute (not relative) time shall be recorded.

For example, Figure 1 below gives a sample plot depicting the combined errors versus applied load.

When reporting values for individual test data, the data should be truncated to two significant digits to the right of the decimal place and reported in load cell verification intervals, $v$ v.

Formula signs and list of symbols

Symbol	Description	Reference
$C_{C} (t)$ C_C(t)	creep magnitude, expressed in terms of $v$ v at time $t$ t obtained over the 30 minutes creep test.	2.1.5
$C_{C} (30 - 20)$ C_C(30 - 20)	difference between output at $t = 30$ t = 30 minutes and at $t = 20$ t = 20 minutes during creep test.	2.1.5.2
$C_{DR}$ C_{"DR"}	minimum dead load output return, expressed in terms of $v$ v	2.1.5
$C_{Hmax}$ C_{"Hmax"}	humidity effect on maximum test load output, expressed in terms of $v$ v	2.1.7
$C_{Hmin}$ C_{"Hmin"}	humidity effect on minimum test load output, expressed in terms of $v$ v	2.1.7
$C_{M}$ C_{"M"}	temperature effect on minimum dead load output, expressed in terms of $v$ v.	2.1.4
$C_{M} (v_{min})$ C_{"M"}(v_{"min"})	temperature effect on minimum dead load output, expressed in terms of $v_{min}$ v_{"min"} per $5 °C$ 5 "unitsml(degC)" for class B, C and D or per $2 °C$ 2 "unitsml(degC)" for class A.	2.1.4
$C_{P}$ C_{"P"}	barometric pressure effect, expressed in terms of $v$ v	2.1.6
$C_{P} (v_{min})$ C_{"P"}(v_{"min"})	barometric pressure effect, expressed in terms of mass ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)") per $kPa$ "unitsml(kPa)".	2.1.6
$D_{max}$ D_{"max"}	maximum test load	R 60-1, 3.5.6
$D_{min}$ D_{"min"}	minimum test load	R 60-1, 3.5.12
$D R$ DR	minimum dead load output return, expressed in mass units ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	R 60-1, 3.5.10
$E_{L}$ E_{"L"}	load cell error, expressed in terms of $v$ v	2.1.2
$E_{max}$ E_{"max"}	maximum capacity of the load cell	R 60-1, 3.5.5
$E_{min}$ E_{"min"}	minimum dead load of the load cell	R 60-1, 3.5.9
$E_{R}$ E_{"R"}	repeatability error, expressed in terms of $v$ v	2.1.3
$f$ f	conversion factor, number of indicated units per verification interval, $v$ v	2.1.2.4
MPE	maximum permissible error	R 60-1, 3.7.10
$n$ n	number of load cell verification intervals into which the load cell measuring range is divided	R 60-1 3.5.13
$n_{LC}$ n_{"LC"}	maximum number of load cell verification intervals	R 60-1, 3.5.8
$p_{LC}$ p_{"LC"}	apportionment factor	R 60-1, 3.7.2
$R_{i}$ R_{"i"}	reference indication (net test load), expressed in indication units	2.1.2.6
$t_{0}$ t_0	time $t_{0} = 0 \min$ t_0 = 0 "unitsml(min)" when the initial indication at minimum test load is measured	2.1.5
$t$ t	time over the 30 minute creep test period after the initial indication ( $t_{0} = 0 \min$ t_0 = 0 "unitsml(min)") at minimum test load	2.1.5
$T_{1}, T_{2}$ T_1, T_2	temperature1, temperature2	2.1.4.2
$v$ v	load cell verification interval	R 60-1, 3.5.4
$v_{min}$ v_{"min"}	minimum load cell verification interval	R 60-1, 3.5.11
$Y$ Y	relative $v_{min}$ v_{"min"}, $Y = (E_{max} - E_{min}) / v_{min}$ Y = (E_{"max"} - E_{"min"}) // v_{"min"}	R 60-1, 3.5.15,
$Z$ Z	relative DR, $Z = (E_{max} - E_{min}) / (2 \times D R)$ Z = (E_{"max"} - E_{"min"}) // (2 xx DR)	R 60-1, 3.5.14

Summary of formulae contained within calculation procedures

Observe extreme caution by referring to calculation procedure for correct application of these formulae.

Use with initial $20 °C$ 20 "unitsml(degC)" ascending load run only. Refer to R 60-2, 2.8.2.

Symbol	Formula
$C_{C}$ C_{"C"}	$C_{C} = (indication - initial indication) / f$ C_C = ("indication" - "initial indication") // f
$C_{C} (30 - 20)$ C_{"C"}(30 - 20)	$C_{C} (30 - 20) = (test indication at 30 minutes - test indication at 20 minutes) / f$ C_{"C"}(30 - 20) = ("test indication at 30 minutes" - "test indication at 20 minutes") // f
$C_{DR}$ C_{"DR"}	$C_{DR} = (minimum test load indication2 - minimum test load indication1) / f$ C_{"DR"} = ("minimum test load indication2" - "minimum test load indication1") // f
$C_{Hmin}$ C_{"Hmin"}	$C_{Hmin} = [{(indication at D_{min})}_{after} - {(indication at D_{min})}_{before}$ C_{"Hmin"} = [("indication at" quad D_{"min"})_{"after"} - ("indication at" quad D_{"min"})_{"before"} // f]
$C_{Hmax}$ C_{"Hmax"}	$C_{Hmax} = [{(indication at D_{max} - indication at D_{min})}_{after} - (indication at D_{max} - indication$ C_{"Hmax"} = [("indication at" quad D_{"max"} - "indication at" quad D_{"min"})_{"after"} - ("indication at" quad D_{"max"} - "indication"
$C_{M}$ C_{"M"}	$C_{M} = (average test indication at T_{2} - average indication at T_{1}) / f$ C_{"M"} = ("average test indication at" quad T_2 - "average indication at" quad T_1) // f
$C_{P}$ C_{"P"}	$C_{P} = (indication at P_{2} - indication at P_{1}) / f$ C_{"P"} = ("indication at" quad P_2 - "indication at" quad P_1) // f
DR	$D R = (E_{max} - E_{min}) \times C_{DR} / n_{LC}$ DR = (E_{"max"} - E_{"min"}) xx C_{"DR"} // n_{"LC"}
$E_{L}$ E_{"L"}	$E_{L} = (average test indication - reference indication) / f$ E_{"L"} = ("average test indication" - "reference indication") // f
$E_{R}$ E_{"R"}	$E_{R} = (maximum indication - minimum indication) / f$ E_{"R"} = ("maximum indication" - "minimum indication") // f
$f$ f	$f = average indication at 0.75 \cdot (D_{max} - D_{min}) - indication at D_{min} / 0.75 \cdot n$ f = "average indication at " 0.75 cdot (D_{"max"} - D_{"min"}) - "indication at " D_{"min"} // 0.75 cdot n [see ]
$R_{i}$ R_{"i"}	$R_{i} = [(test load - D_{min}) / (D_{max} - D_{min})] \times n \times f$ R_{"i"} = [("test load" - D_{"min"}) // (D_{"max"} - D_{"min"})] xx n xx f

Guidance for the application of this Test Report Format

In case a prescribed test is not relevant for the type of instrument to be tested, the reason why the test is omitted shall be clearly stated in the field “Remarks” (for instance surge tests on signal lines shorter than 30 m, tests related to AC mains supply in case of an instrument only powered by batteries, or partial testing after modification of a previously tested type).

The number of the report and the page numbers shall be completed in the heading.

Page 1 of this Report Format may be replaced by a cover page by the Issuing Authority.

Enter “NA” or “/” for “the test is not applicable”.

The Evaluation Report

Cover page by the Issuing Authority

Authority responsible for this Report

Name
Address
Report number
Application number
Period of tests
Date of issuing this Report
Name and signature of the
responsible person
Stamp(s) (if applicable)

Synopsis of the results of the examination and tests

The load cell under test fulfils ALL the applicable requirements according to OIML R 60-1

Yes

Remarks:

‌

Summary of the results of the examination and tests

To be completed by the Issuing Authority

Examinations

For details, refer to the tests as indicated in the last column.

General requirements	Passed	Failed	Details in R 60
Documentation			R 60-2, 2.5
Inscription and presentation of load cell information			R 60-1, 6.2

Performance tests (Refer to R 60-2, 2.10)

For details, refer to the tests as indicated in the last column.

Tests performed at ( $20 °C$ 20 "unitsml(degC)" / $X_{1} °C$ X_1 "unitsml(degC)" / $X_{2} °C$ X_2 "unitsml(degC)" / $20 °C$ 20 "unitsml(degC)"):

Test procedure	Passed	Failed	Details in R 60
Maximum permissible measurement errors			R 60-1, 5.3 / R 60-2, 2.10.1
Repeatability error			R 60-1, 5.4 / R 60-2, 2.10.1
Temperature effect on minimum dead load output return			R 60-1, 5.6.1.3 / R 60-2, 2.10.1
Creep test			R 60-1, 5.5.1 / R 60-2, 2.10.2
Minimum dead load output return (DR)			R 60-1, 5.5.2 / R 60-2, 2.10.3
Barometric pressure effects at ambient temperature			R 60-1, 5.6.2 / R 60-2, 2.10.4
Humidity effects (CH, SH)			R 60-1, 5.6.3 / R 60-2, 2.10.5 / 2.10.6

Additional tests performed for digital load cells:

Test procedure	Passed	Failed	Details in R 60
Warm-up time			R 60-1, 5.7.2.1 / R 60-2, 2.10.7.3
Power voltage variations			R 60-1, 5.7.2.2 / 5.7.2.3 / 5.7.2.4 / R 60-2, 2.10.7.4
Short-time power reductions			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.5
Bursts (electrical fast transients)			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.6
Surge			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.7
Electrostatic discharge			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.8
Electromagnetic susceptibility			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.9
Immunity to conducted electromagnetic fields			R 60-1, 5.7.2.5 / R 60-2, 2.10.7.10
Span stability			R 60-1, 5.7.2.6 / R 60-2, 2.10.7.11
Software			R 60-1, 6.1

General information regarding the evaluation process Manufacturer of the specimen

Company
Address
Contact information

Applicant

Company
Representative (name, telephone)
Address
Contact information
Reference
Date of application
Application number
Applicant authorised by the manufacturer (documented)	☐ Yes	☐ No
Statement that no concurrent application for OIML type evaluation has been made to any other OIML Issuing Authority (see Procedural Document PD-05 [29], 4.1.2 b)	☐ Yes	☐ No
Remarks: ‌ ‌ ‌

Testing laboratories involved in the tests

(This table has to be completed for each test laboratory)

Name
Address
Application number
Tests by this laboratory
Date/period of tests
Name(s) of test engineer(s)
Accredited by		Number:	Expires (date):
Accreditation includes R 60	☐ Yes	Edition: ☐	☐ No
Details of relevant peer assessment or assessment by other means
In case tests have been performed at locations other than the address of this laboratory, give details here
Name of the responsible person
Date of signature
Stamp (if applicable) and signature of the responsible person
Remarks: ‌ ‌ ‌

General information concerning the load cell type

(as provided by the manufacturer prior to the evaluation)

Manufacturer’s name/trade mark
Manufacturer’s type designation (or load cell model number)

	Unit	Range
Accuracy classes
Maximum number of verification intervals, $n_{LC}$ n_{"LC"}
Maximum capacity, $E_{max}$ E_{"max"}	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum capacity, $E_{min}$ E_{"min"}	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum load cell verification interval, $v_{min} = (E_{max} - E_{min}) / Y$ v_{"min"} = (E_{"max"} - E_{"min"}) // Y	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum dead load output return, $D R = 1 / 2 (E_{max} - E_{min}) / Z$ DR = 1//2 (E_{"max"} - E_{"min"})//Z	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Rated output	( $mV V^{- 1}$ "unitsml(mV/V)" or counts)
Input impedance	$Ω$ "unitsml(Ohm)"

Accessories, supplied with the test pattern by the applicant

Accessory	Remarks and specifications
Analogue data processing device (see OIML R 76 [1], T.2.2.3)
Cables
Load cell mounting hardware
Load introduction elements
Main power supply
Battery (type, voltage)
Indicator (see OIML R 76 [1], T.2.2.2)
Data printer
Other accessories:

Further remarks concerning accessories:

_________________________________________________________________________________

Selection of sample(s) tested Definition of the test pattern (supplied by the applicant for this test report)

This test report is issued for the following load cell:

Model designation	Serial number	Maximum capacity	Maximum number of load cell intervals	Minimum load cell verification interval	Minimum dead load output return
Model designation	Serial number	$E_{max}$ E_{"max"} ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	$n_{LC}$ n_{"LC"}	$v_{min}$ v_{"min"} ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	DR ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")

Justification of the selection of the test sample(s)

(refer to R 60-2, 2.3, 2.4 and Annex D):

Model designation	Serial number	Justification / Remark	Test Report No. (if available)

Adjustments and modifications made to the samples during the testing:

Justification of the selection of the test sample(s) (refer to R 60-2, 2.3):

Model designation	Serial number	Adjustments and modifications made to the samples	Test Report No. (if available)

Further information concerning adjustments:

_________________________________________________________________________________

Additional information concerning the type General information of the load cell under test (specified by the manufacturer)

Manufacturer’s name/trade mark
Manufacturer’s type designation (or load cell model number)
Serial number
Load cell construction (e.g. S-type, ring type, bending beam)
Load cell material
Sealing of strain gauge application (e.g. hermetically, potted)
Digital load cell (Yes / no)
Accuracy classes
Maximum number of verification intervals, $n_{LC}$ n_{"LC"}
Maximum capacity, $E_{max}$ E_{"max"}	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum capacity, $E_{min}$ E_{"min"}	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum load cell verification interval, $v_{min} = (E_{max} - E_{min}) / Y$ v_{"min"} = (E_{"max"} - E_{"min"}) // Y	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Minimum dead load output return, $DR = \frac{1}{2} (E_{max} - E_{min}) / Z$ "DR" = 1/2 (E_{"max"} - E_{"min"})//Z	( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
Rated output	( $mV V^{- 1}$ "unitsml(mV/V)" or counts)
Input impedance mandatory for strain gauge load cells	$Ω$ "unitsml(Ohm)"
Cable connection mandatory for strain gauge load cells		4-wire / 6-wire
Cable length mandatory for strain gauge load cells with 4-wire connection	$m$ "unitsml(m)"

Additional information concerning the type (connection equipment, interfaces, etc.):

_________________________________________________________________________________

Additional information for the performance tests

(Refer to R 60-1, 6.2.2, 6.2.3, and 6.2.4)

Accuracy class ☐ A ☐ B ☐ C ☐ D
Working temperature (if other than $- 10 °C$ -10 "unitsml(degC)" to $+ 40 °C$ +40 "unitsml(degC)"): Upper_____ $°C$ "unitsml(degC)", Lower_____ $°C$ "unitsml(degC)"
Humidity symbol ☐ NH ☐ SH ☐ CH or no marking
Loading designation: (refer to R 60-1, 6.2.4.2) Tension Compression Universal Beam (shear) Beam (bending)
Minimum dead load as: $E_{min} =$ E_{"min"} =
Safe load limit as: $E_{lim} =$ E_{"lim"} =
Excitation voltage: ☐ AC ☐ DC
Value of the apportionment factor, $p_{LC}$ p_{"LC"}, if not equal to 0.7

Additional information of the test pattern for digital load cells

Power voltage: ☐ AC ☐ DC
Interfaces:
Output signal:
Software identification:
Value of the apportionment factor, $p_{LC}$ p_{"LC"}, if not equal to 0.7

Relevant photographs taken during the examinations and tests

‌ ‌ ‌ ‌ ‌

Documentation supplied with the test pattern by the applicant

Name of the document	Content	Version No. / date of issue

Inscriptions and presentations of load cell information

(according to manufacturer statement, refer to R 60-1, 6.2)

R 60-1 reference	Information	In the data sheet
6.2.1 / 6.2.2	Name or trademark of manufacturer
6.2.1 / 6.2.2	Manufacturer’s own designation or load cell model
6.2.1	Serial number	Not applicable
6.2.1	Year of production	Not applicable
6.2.2 / 6.2.4.1	Accuracy class(es) and their symbols
6.2.4.5	Maximum number of load cell verification intervals, $n_{LC}$ n_{"LC"}
6.2.2 / 6.2.4.2	Type of load
6.2.2 / 6.2.4.3	Working temperature designation
6.2.2 / 6.2.4.4	Humidity symbol “NH”
6.2.2 / 6.2.4.4	Humidity symbol “SH”
6.2.2 / 6.2.4.4	No humidity symbol or “CH”
6.2.2	Minimum dead load, $E_{min}$ E_{"min"} in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.1 / 6.2.2	Maximum capacity, $E_{max}$ E_{"max"} in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.2	Safe load limit, $E_{lim}$ E_{"lim"} in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.2	Minimum load cell verification interval ( $v_{min}$ v_{"min"}) in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.3, a	Relative $v_{min}$ v_{"min"} ( $Y$ Y)
6.2.3, b	Minimum dead load output return DR in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.3, b	Relative DR ( $Z$ Z)
6.2.2, l	Rated output
6.2.2, l	Excitation voltage
6.2.2, l	Input impedance
6.2.2, l	Cable connection e.g. 4-wire / 6-wire cable
6.2.2, l	Cable length mandatory for strain gauge load cells with 4-wire connection
6.2.2, k	Apportionment factor, $p_{LC}$ p_{"LC"} (if not equal to 0.7)
6.2.2, l 6.2.3, c	Further information

Further load cell information given by the manufacturer:

_________________________________________________________________________________

Various designs within the model range:

Model designation	Maximum capacity	Minimum dead load	Maximum number of load cell intervals	Minimum load cell verification interval	Minimum dead load output return
Model designation	$E_{max}$ E_{"max"} ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	$E_{min}$ E_{"min"} ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	$n_{LC}$ n_{"LC"}	$v_{min}$ v_{"min"} ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	DR ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")

Relevant photographs / documentation of the model range:

‌ ‌ ‌ ‌ ‌

Definition of load cell families / construction

(This table is to be completed by the manufacturer for each load cell family within the model range)

Specification	OIML R 60-1	Remark
Application of load	3.2.1	(e.g. tension / compression)
Load cell construction	3.3	(e.g. bending beam)
Material or combination of materials	3.4.2
Shape	3.4.2	See R 60-2, 6.2.1
Design of measuring technique	3.3.1	(e.g. strain gauge bonded to metal)
Sealing of strain gauges	3.4.2
Mounting method	Annex E
Load transmission	Annex E	See R 60-3, 4.9.1
Output rating	3.4.2
Supply voltage	3.4.2
Input impedance	3.4.2
Cable connection	3.4.2
Cable length mandatory for strain gauge load cells with 4-wire connection	3.4.2

Further remarks concerning the definition of load cell families / construction (see table above)

_________________________________________________________________________________

Load cell dimensions within the load cell family

Pictures / Drawings of the load cell dimensions of the load cell family

‌

Recommended load transmissions of the manufacturer

Pictures / Drawings of the recommended load transmissions

‌

Results of previous tests that were taken into account

Model designation	Serial number	Justification / Remark	Test Report No. (if available)

Information concerning the test equipment used for the tests

(including details of simulations and the way uncertainties are taken into account, including the level of “risk.” For instance, 95 % or $k = 2$ k = 2)

The following tables have to be completed for each individual piece of test equipment used for the tests.

General information:

For each of the following pieces of test equipment, indicate for which of the following test procedures the test equipment is used:

R 60 reference	Test procedure
R 60-2, 2.10.1	Measurement error, repeatability error and temperature effect on minimum dead load output
R 60-2, 2.10.2	Determination of creep error
R 60-2, 2.10.3	Minimum dead load output return (DR)
R 60-2, 2.10.4	Barometric pressure effects (atmospheric pressure)
R 60-2, 2.10.5	Humidity effects for load cells marked with CH or no marked
R 60-2, 2.10.6	Humidity effects for load cells marked SH
R 60-2, 2.10.7	Additional tests for digital load cells

A piece of test equipment is used for determination of the measurement error (R 60-2, 2.10.1), the creep error (R 60-2, 2.10.2), the minimum dead load output return (R 60-2, 2.10.3) and humidity effect marked with SH (R 60-2, 2.10.6):

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Force generating system (if a force generating system or force generating machine is used)

	Description	Remark
Designation
Type
Manufacturer
Identification number
Load range
Load steps
Unit
Preload
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The force generating system is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the force generating system:

_________________________________________________________________________________

Weights

(if the load cell is tested manually with weights)

Number / identification	Weight ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	Class according to OIML R 111 / rel. uncertainty ( $k = 2$ k = 2)	Last calibration	Recalibration interval	Certificate No. / report No.

The weights are used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the weights:

_________________________________________________________________________________

Temperature chamber (without humidity control)

	Description	Remark
Designation
Type
Manufacturer
Identification number
Height $\times$ xx width $\times$ xx length dimension
Temperature range
Temperature stability
Humidity range
Humidity stability
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The climate chamber is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the temperature chamber:

_________________________________________________________________________________

Climate chamber (with temperature and humidity control)

	Description	Remark
Designation
Type
Manufacturer
Identification number
height $\times$ xx width $\times$ xx length dimension
Temperature range
Temperature stability
Humidity range
Humidity stability
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The climate chamber is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the climate chamber:

_________________________________________________________________________________

Indicator / Indicating instrument

(for testing analogue load cells)

	Description	Remark
Designation
Type
Manufacturer
Identification / Serial number
Measurement range
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

Settings of the indicator / indicating instrument used for the tests

	Description	Remark
Measurement range
Supply voltage (AC/DC)
Filter settings
Cable connections

The indicator / indicating instrument is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the indicator / indicating instrument:

_________________________________________________________________________________

Terminal / Digital data processing device

(for testing digital load cells)

	Description	Remark
Designation
Type
Manufacturer
Identification / Serial number
Measurement range
Last calibration
Certificate No. / report No.
Recalibration interval

Settings of the indicator / indicating instrument used for the tests

	Description	Remark
Measurement range
Supply voltage (AC/DC)
Filter settings
Cable connections

The terminal / digital data processing device is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks / picture of the terminal / digital data processing device:

_________________________________________________________________________________

Barometric pressure meter

	Description	Remark
Type
Manufacturer
Identification / Serial number
Measurement range
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The barometric pressure meter is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Thermometer

	Description	Remark
Type
Manufacturer
Identification / Serial number
Measurement range
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The thermometer is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Moisture analyser

	Description	Remark
Type
Manufacturer
Identification / Serial number
Measurement range
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The moisture analyser is used for the following test procedures

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Additional test equipment

(e.g. burst generator for testing of digital load cells)

	Description	Remark
Test equipment
Type
Manufacturer
Identification / Serial number
Measurement range
Rel. uncertainty ( $k = 2$ k = 2)
Last calibration
Certificate No. / report No.
Recalibration interval

The equipment is used for the following test procedures:

R 60-2 reference	2.10.1	2.10.2	2.10.3	2.10.4	2.10.5	2.10.5	2.10.6	2.10.7
Used for

Remarks (settings, pictures, further information)

_________________________________________________________________________________

Examination

(To be completed by the Evaluating Authority)

Marking requirements (R 60-1, 6.2) Mandatory markings on the load cell (R 60-1, 6.2.1)

R 60-1 reference	Information	Fulfils requirements
R 60-1 reference	Information	Yes	No
6.2.1	Name or trademark of manufacturer
6.2.1	Manufacturer’s own designation or load cell model
6.2.1	Serial number
6.2.1	Maximum capacity, $E_{max}$ E_{"max"} In units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")
6.2.1	Year of production
6.2.1	Type approval mark (if applicable)

Mandatory markings on the load cell or an accompanying document

(R 60-1, 6.2.2)

R 60-1 reference	Mandatory information	On load cell	In document	Fulfils requirements
R 60-1 reference	Mandatory information	On load cell	In document	Yes	No
6.2.4.1	Accuracy classes and their symbols
6.2.4.5	Maximum number of load cell verification intervals, $n_{LC}$ n_{"LC"}
6.2.4.2	Loading designation (if necessary)
6.2.4.3	Working temperature designation
6.2.4.4	Humidity symbol “NH”
6.2.4.4	Humidity symbol “SH”
6.2.2	Minimum dead load, $E_{min}$ E_{"min"}
6.2.2	Safe load limit, $E_{lim}$ E_{"lim"}
5.1.3, 6.2.2	Minimum load cell verification interval ( $v_{min}$ v_{"min"})
6.2.2	Other pertinent conditions
3.7.2, 5.3.2	Apportionment factor, $p_{LC}$ p_{"LC"} (if not equal to 0.7)
5.1.6	Standard classification
5.1.7	Multiple classifications

Non-mandatory, additional information (R 60-1, 6.2.3)

R 60-1 reference	Mandatory information	On load cell	In document	Fulfils requirements
R 60-1 reference	Mandatory information	On load cell	In document	Yes	No
5.6.3.1	Humidity symbol “CH”
3.5.15	Relative $v_{min}, Y$ v_{"min"}, Y
3.5.14	Relative $DR, Z$ "DR", Z

Suitability for testing (R 60-2, 2.3, 2.4)

Date:	Observer:	Serial number:
		Fulfils requirements
		Yes	No



Remarks ‌ ‌ ‌
Passed ☐ Yes ☐ No

Software (if present) (R 60-1, 6.1)

Date:	Observer:	Serial number:
Version of software:	Identification code:

	Yes	No
Software protected by sealing
Automatic change of identification code
Fixed version number
Remarks: ‌ ‌ ‌
Passed ☐ Yes ☐ No

Documentation for type approval (R 60-2, 2.5)

	Yes	No	Remarks
a) Description of the general principle of measurement (R 60-2, 2.5, a)
b) List and characteristics of essential components + details
c) Mechanical drawings (R 60-2, 2.5, b)
d) Electric/electronic diagrams (R 60-2, 2.5, c)
e) Installation requirements (R 60-2, 2.5, d)
f) Sealing plan
g) Panel layout
h) General information of the software (R 60-2, 2.5, g)			For details, see R 60-1, 6.1
Operating instructions (R 60-2, 2.5, e)
j) Information supporting the manufacturer’s assumption of compliance (R 60-2, 2.5, f)
Other relevant information pertaining to identification of the instrument, diagrams, results of previous tests, etc.: (attach photograph(s) and/or outline-drawing(s) here if available): ‌ ‌
Remarks: ‌ ‌
Passed			☐ Yes ☐ No

Performance tests Results of the performance tests

DR is the minimum dead load output return in units of ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)") and determined according to R 60-3, 2.1.5.8

Maximum error in unit $v_{min}$ v_{"min"}

Clause R 60-1/2	Performance tests	Maximum error in v	Remark
R 60-1, 5.3 / R 60-2, 2.10.1	Load cell errors ( $E_{L}$ E_L) (see R 60-3, 2.1.2)
R 60-1, 5.4 / R 60-2, 2.10.1	Repeatability errors ( $E_{R}$ E_R) (see R 60-3, 2.1.3)
R 60-1, 5.5.1 / R 60-2, 2.10.2	Creep ( $C_{C} (t)$ C_C(t)) (see R 60-3, 2.1.5)
R 60-1, 5.5.1 / R 60-2, 2.10.2	Creep ( $C_{C} (30 - 20)$ C_C(30-20)) (see R 60-3, 2.1.5.2)
R 60-1, 5.5.2 / R 60-2, 2.10.3	Minimum dead load output return ( $C_{DR}$ C_{"DR"}) (see R 60-3, 2.1.5.4)		(See ) $DR =$ "DR" =
			(See ) $DR =$ "DR" =
			(See ) $DR =$ "DR" =
			(See ) $DR =$ "DR" =
R 60-1, 5.6.3.1 / R 60-2, 2.10.5	Humidity effects ( $C H_{min}$ CH_{"min"}) (CH or no mark) (see R 60-3, 2.1.7.1)
R 60-1, 5.6.3.1 / R 60-2, 2.10.5	Humidity effects ( $C H_{max}$ CH_{"max"}) (CH or no mark) (see R 60-3, 2.1.7)
R 60-1, 5.6.3.2 / R 60-2, 2.10.6	Humidity effects (SH) (see R 60-3, 2.1.8)
R 60-1, 5.6.1.3 / R 60-2, 2.10.1	Temperature effects on minimum dead load output ( $C_{M}$ C_M) (see R 60-3, 2.1.4)	(See )
R 60-1, 5.6.2 / R 60-2, 2.10.4	Barometric pressure effects ( $C_{P} (v_{min})$ C_P (v_{"min"})) (see R 60-3, 2.1.6)	(See )

Remarks:

_________________________________________________________________________________

Results of the Performance tests for digital load cells

Clause R 60-1/2	Performance tests	Temperature in $°C$ "unitsml(degC)"	report page No.	Maximum error in v	Passed	Failed	Remark
R 60-1, 5.7.2.1 / R 60-2, 2.10.7.3	Warm-up time (see R 60-3, 2.2.1)
R 60-1, 5.7.2 / R 60-2, 2.10.7.4	Power voltage variations (see R 60-3, 2.2.2)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.5	Short time power reductions (see R 60-3, 2.2.3)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.6	Bursts (electrical fast transients) (see R 60-3, 2.2.4)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.7	Surge (see R 60-3, 2.2.5)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.8	Electrostatic discharge (see R 60-3, 2.2.6)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.9	Electromagnetic susceptibility (see R 60-3, 2.2.7)
R 60-1, 5.7.2.5 / R 60-2, 2.10.7.10	Immunity to conducted electromagnetic fields (see R 60-3, 2.2.8)
R 60-1, 5.7.2.6 / R 60-2, 2.10.7.11	Span stability (see R 60-3, 2.2.9)

Remarks:

_________________________________________________________________________________

Initial tests and general notes concerning performance tests

(To be completed or under the responsibility of the Evaluating Authority)

Units

Unit (e.g. counts, digits, g, kg, t) in which the measurement result is displayed.

R 60-2 reference	Test procedure	Unit
2.10.1	Measurement error, repeatability error and temperature effect on minimum dead load output
2.10.2	Determination of creep error
2.10.3	Minimum dead load output return (DR)
2.10.4	Barometric pressure effects (Atmospheric pressure)
2.10.5	Humidity effects for load cells marked with CH or no marked
2.10.6	Humidity effects for load cells marked SH
2.10.7	Additional tests for analogue-active cells

Measurement range (R 60-1, 5.2, 5.5.2)

				Fulfils requirements
Test procedure (R 60-2 reference)	$D_{max}$ D_{"max"}	$D_{min}$ D_{"min"}	Conversion factor, $f [indication / v$ f ["indication" // v] (see R 60-3, 2.1.2.4)	Yes	No
2.10.1
2.10.2
2.10.3
2.10.4
2.10.5
2.10.6
2.10.7
Passed		☐Yes		☐No

Conditions

(see R 60-2, 2.8.1)

(To ensure that these requirements are met, the calculations should be carried out using lower $n$ n values than the $n_{LC}$ n_{"LC"} specified. The calculations made do not include the application of 2.8.1).

Check that

v_{min} \leq \frac{D_{max} - D_{min}}{n}

v_{"min"} <= {D_{"max"} - D_{"min"}} / n

It should be sufficient to carry out the calculations with $n = n_{LC}$ n = n_{"LC"}, $n_{max} - 500$ n_{"max"} - 500 and $n = n_{LC} - 1000$ n = n_{"LC"} - 1000 if applicable.

Test procedure (R 60-2 reference)	Is the requirement $v_{min} \leq \frac{D_{max} - D_{min}}{n}$ v_{"min"} <= {D_{"max"} - D_{"min"}} / n fulfilled with
	$n_{LC}$ n_{"LC"}		$n_{LC} - 500$ n_{"LC"} - 500		$n_{LC} - 1000$ n_{"LC"} - 1000
	Yes	No	Yes	No	Yes	No
2.10.1
2.10.2
2.10.3
2.10.4
2.10.5
2.10.6
2.10.7

Passed ☐ Yes ☐ No

Input impedance

Measure the input impedance and compare the result with the input impedance in OIML R 60-3, 4.5.

Load test data (Load cell error <stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) 3 runs

Ref.: R 60-2, 2.10.1.1 to 2.10.1.11. Complete one sheet for each test temperature, one for each humidity (SH) test in 2.10.6, and when applicable, one for each electronics power voltage in 2.10.7.4.

(3 runs)

* = Average initial minimum test load indication.
Absolute (not relative) time shall be recorded.

Test load (units)	Run no. 1		Run no. 2		Run no. 3		Average indication (counts)	Repeatability error (counts)
Test load (units)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Average indication (counts)	Repeatability error (counts)
0

0

0

0
0							*

R 60-2, 2.10.1.1 to 2.10.1.11. Complete one sheet for each test temperature, one for each humidity (SH) test in 2.10.6, and when applicable, one for each electronics power voltage in 2.10.7.4.

(5 runs)

* = Average initial minimum test load indication.
Absolute (not relative) time shall be recorded.

Test load (units)	Run no. 1		Run no. 2		Run no. 3		Run no. 4		Run no. 5		Average indication (counts)
	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)
0

0

0

0
0											*

Load cell errors (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) calculation

R 60-1, 5.3.1
R 60-2, 2.10.1.12 to 2.10.1.14
R 60-3, 2.1.2.2

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}:

$n_{LC}$ n_{"LC"}:

$v_{min}$ v_{"min"}:

$p_{LC}$ p_{"LC"}: DR:

Force-generating system:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Conversion factor, $f$ f:

75 % test load ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)"):

Reference indication at 75 % test load:

Test load (units)	Reference indication (counts)	. . . . $°C$ "unitsml(degC)" ( $20 °C$ 20 "unitsml(degC)")		. . . . $°C$ "unitsml(degC)" ( $T_{1} °C$ T_1 "unitsml(degC)")		. . . . $°C$ "unitsml(degC)" ( $T_{2} °C$ T_2 "unitsml(degC)")		. . . . $°C$ "unitsml(degC)" ( $20 °C$ 20 "unitsml(degC)")		MPE ( $v$ v)
Test load (units)	Reference indication (counts)	Indications (counts)	Error ( $E_{L}$ E_L) ( $v$ v)	Indication (counts)	Error ( $E_{L}$ E_L) ( $v$ v)	Indication (counts)	Error ( $E_{L}$ E_L) ( $v$ v)	Indication (counts)	Error ( $E_{L}$ E_L) ( $v$ v)	MPE ( $v$ v)
0	0	0		0		0		0

Load/reference indications: if a 75 % load point was not obtained, a straight line interpolation between the adjacent higher and lower load point indications is used (see R 60-1, 5.3.1 and calculation procedures in R 60-3, 2.1.2.2).
Error, $E_{L}$ E_{"L"}: the difference between the test indication and the reference indication divided by the conversion factor, $f$ f.
Test load values are values above minimum test load, $D_{min}$ D_{"min"}.

Repeatability errors (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>R</mi> </msub> </mstyle> </math><asciimath>E_R</asciimath></stem>) calculation

R 60-1, 5.4
R 60-2, 2.10.1.15
R 60-3, 2.1.3

Test load (unit)	…. $°C$ "unitsml(degC)" ( $20 °C$ 20"unitsml(degC)")		…. $°C$ "unitsml(degC)" ( $T_{1} °C$ T_1"unitsml(degC)")		…. $°C$ "unitsml(degC)" ( $T_{2} °C$ T_2"unitsml(degC)")		…. $°C$ "unitsml(degC)" ( $20 °C$ 20"unitsml(degC)")		MPE ( $v$ v)
Test load (unit)	Repeatability error (counts)	Repeatability error $v$ v	Repeatability error (counts)	Repeatability error $v$ v	Repeatability error (counts)	Repeatability error $v$ v	Repeatability error (counts)	Repeatability error $v$ v	MPE ( $v$ v)

Error, $E_{R}$ E_R: the maximum difference between the three test indications divided by the conversion factor, $f$ f (classes C and D) or the maximum difference between the five test indications divided by the conversion factor, $f$ f (classes A and B).

Temperature effects on minimum dead load output (MDLO)

R 60-1, 5.5.2
R 60-2, 2.10.1.16
R 60-3, 2.1.4

Temprature ( $°C$ "unitsml(degC)")	Indication ( )	Change ( $v$ v)	Change ( $v_{\min}$ v_{"min} / . . . $°C$ "unitsml(degC)")	mpc ( $v_{min}$ v_{"min"} / . . . $°C$ "unitsml(degC)")

				$p_{LC}$ p_{"LC"}
				$p_{LC}$ p_{"LC"}
				$p_{LC}$ p_{"LC"}

PASS: ☐ FAIL: ☐

MDLO: minimum dead load output.
Indication: the average initial minimum test load indication obtained from .
The maximum permissible change (mpc) allowed is: ( $v_{min} / 5 °C$ v_{"min"} // 5 "unitsml(degC)") for classes B, C, and D; ( $v_{min} / 2 °C$ v_{"min"} // 2 "unitsml(degC)") for class A.
Change, $C_{M}$ C_{"M"} ( $v$ v): the difference between the observed indications, and the indications at the prior temperature, divided by the conversion factor, $f$ f.

Creep (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mi>C</mi> </msub> </mstyle> </math><asciimath>C_C</asciimath></stem>) and DR (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mtext>DR</mtext> </msub> </mstyle> </math><asciimath>C_{"DR"}</asciimath></stem>)

R 60-1, 5.5.1, 5.5.2
R 60-2, 2.10.2, 2.10.3. Complete one sheet for each test temperature.

Creep							DR
Test load	Original		Barom. Press.	Change of		mpc	Test load	Original		Barom. Press.	Change of		mpc
Test load	Indication	Time	Barom. Press.	Indication	Time	mpc	Test load	Indication	Time	Barom. Press.	Indication	Time	mpc
	counts	hh:mm:ss	$kPa$ "unitsml(kPa)"	$v$ v	mm:ss	$v$ v		counts	hh:mm:ss	$kPa$ "unitsml(kPa)"	$v$ v	mm:ss	$v$ v
$D_{min}$ D_{"min"}
$D_{max}$ D_{"max"}





(*)							$D_{max}$ D_{"max"}
$D_{min}$ D_{"min"}


							(***)
$D_{max}$ D_{"max"}							$D_{min}$ D_{"min"}
(**)

Change ( $v$ v) for creep: the observed indication minus the initial “load” indication (**) divided by the conversion factor, $f$ f.
Determine the difference between the reading obtained at 20 minutes and the reading obtained at 30 minutes (see 5.5.1).
Change ( $v$ v) for DR: the initial indication (***) minus the initial “no load” indication (*) divided by the conversion factor, $f$ f.
Absolute (not relative) time shall be recorded.

Barometric pressure effects (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>C</mi> <mi>P</mi> </msub> </mstyle> </math><asciimath>C_P</asciimath></stem>)

R 60-1, 5.6.2
R 60-2, 2.7.3.8, 2.10.4
R 60-3, 2.1.6

Complete one sheet for each test temperature.

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Conversion factor, $f$ f:

Pressure ( $kPa$ "unitsml(kPa)")	Indication (counts)	Time hh:mm	Change ( $v$ v)	Change ( $v_{\min}$ v_{"min} / $kPa$ "unitsml(kPa)")	mpc ( $v_{min}$ v_{"min"} / $kPa$ "unitsml(kPa)")
			0	0	0
					1

PASS: ☐ FAIL: ☐

Humidity effects Humidity effects (CH or no mark)

R 60-1, 5.6.3
60-2, 2.7.3.9, 2.10.5
R 60-3, 2.1.7

Form 6.10.1.(a): Humidity effects summary (CH or no mark)

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Conversion factor, $f$ f:

Test load (g, kg, or t)	Before humidity test		After humidity test		Change ( $v$ v)	mpc ( $v$ v)
Test load (g, kg, or t)	Indication (counts)	Time (hh mm ss)	Indication (counts)	Time (hh mm ss)	Change ( $v$ v)	mpc ( $v$ v)


















Average indication at $D_{min}$ D_{"min"} (¤) $C_{Hmin} =$ C_{"Hmin"} = ← $< 4 % n_{LC}$ < 4 % n_{"LC"}
Average indication at $D_{max}$ D_{"max"} (‡)
Average difference (*) $C_{Hmax} =$ C_{"Hmax"} =						1

(¤) Indications at minimum test load

Change (¤), $C_{Hmin}$ C_{"Hmin"}: PASS: ☐ FAIL: ☐

(‡) Indications at maximum test load

(*) Average, see R 60-1, 5.6.3 and R 60-3, 2.1.7

Change (*), $C_{Hmax}$ C_{"Hmax"}: PASS: ☐ FAIL: ☐

This test is not necessary if the load cell is marked NH or SH.
Change ( $v$ v): the difference between the indication after and before humidity exposure divided by the conversion factor, $f$ f.
Use five test runs for Class A and B; use 3 test runs for Class C and D.
Absolute (not relative) time shall be recorded.
For family certification this test is not necessary, if a pattern with a smaller capacity and the same or better metrological characteristics has passed this test.

Form 6.10.1.(b): Load test data (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) — 3 runs

R 60-2, 2.10.1.1-2.10.1.11. Complete this form if the measurement error is determined before the humidity test (CH) is carried out (not mandatory)

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Electronics power voltage (when applicable):

3 runs

* Average initial minimum test load indication

Absolute (not relative) time shall be recorded

Test load (unit)	Run no. 1		Run no. 2		Run no. 3		Average indication counts	Repeatability error counts
Test load (unit)	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Average indication counts	Repeatability error counts








*

Form 6.10.1.(c): Load test data (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) — 3 runs

R 60-2, 2.10.1.1-2.10.1.11. Complete this form if the measurement error is determined after the humidity test (CH) is carried out (not mandatory)

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Electronics power voltage (when applicable):

(3 runs)

* Average initial minimum test load indication

Absolute (not relative) time shall be recorded

Test load (unit)	Run no. 1		Run no. 2		Run no. 3		Average indication counts	Repeatability error counts
Test load (unit)	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Average indication counts	Repeatability error counts







*

Form 6.10.1.(d): Load test data (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) — 5 runs

R 60-2, 2.10.1.1-2.10.1.11. Complete this form if the measurement error is determined before the humidity test (CH) is carried out (not mandatory)

Table 6.10.1.(d) 5 runs

* Average initial minimum test load indication

Test load (unit)	Run no. 1		Run no. 2		Run no. 3		Run no. 4		Run no. 5		Average indication counts	Repeatability error counts
Test load (unit)	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Average indication counts	Repeatability error counts







*

Form 6.10.1.(e):Load test data (<stem block="false" type="MathML"><math xmlns="http://www.w3.org/1998/Math/MathML"> <mstyle displaystyle="false"> <msub> <mi>E</mi> <mi>L</mi> </msub> </mstyle> </math><asciimath>E_L</asciimath></stem>) — 5 runs

R 60-2, 2.10.1.1-2.10.1.11. Complete this form if the measurement error is determined after the humidity test (CH) is carried out (not mandatory)

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Electronics power voltage (when applicable):

5 runs

* Average initial minimum test load indication

Test load (unit)	Run no. 1		Run no. 2		Run no. 3		Run no. 4		Run no. 5		Average indication counts	Repeatability error counts
Test load (unit)	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Indication counts	Time hh:mm:ss	Average indication counts	Repeatability error counts







*

Humidity effects (SH) Form 6.10.2 Humidity effects (SH) summary

R 60-1, 5.6.3.2
R 60-2, 2.7.3.9, 2.10.6
R 60-3, 2.1.8

For summary of SH-humidity load test errors: use form 6.3 (3 runs) or 6.4 (5 runs) as appropriate to record individual teat results.

Test load $kg$ "unitsml(kg)"	Reference indication (counts)	…. $°C$ "unitsml(degC)" ( $20 °C$ 20 "unitsml(degC)") …. % (50 %) RH		…. $°C$ "unitsml(degC)" (High) …. % (85 %) RH		…. $°C$ "unitsml(degC)" ( $20 °C$ 20 "unitsml(degC)") …. % (50 %) RH		MPE $v$ v
Test load $kg$ "unitsml(kg)"	Reference indication (counts)	Indication (counts)	Error ( $E_{L}$ E_{"L"}) $v$ v	Indication (counts)	Error ( $E_{L}$ E_{"L"}) $v$ v	Indication (counts)	Error ( $E_{L}$ E_{"L"}) $v$ v	MPE $v$ v

Load/reference indications: if at 75 % load point was not obtained, a straight line interpolation between the adjacent higher and lower load point indication is used.
Error, $E_{L}$ E_{"L"}: the difference between the test reference and the reference indication divided by the conversion factor, $f$ f.
Test load values are values above minimum test load, $D_{min}$ D_{"min"}.
Conditioning period: the time period for exercising the load cell.
For family certification this test is not necessary, if a pattern with a smaller capacity and the same or better metrological characteristics has passed this test.

Warm-up time Form 6.11 Warm-up time

R 60-1, 3.5.17
R 60-2, 2.10.7.3
R 60-3, 2.2.1

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Conversion factor, $f$ f: counts/ $v$ v

Duration of disconnection before test:

		Initial run		After 5 min.		After 15 min.		After 30 min.		mpc $v_{min}$ v_{"min"}
		Indication (counts)	Time hh:mm:ss	Indication (counts)	Time hh:mm:ss	Indication (counts)	Time hh:mm:ss	Indication (counts)	Time hh:mm:ss	mpc $v_{min}$ v_{"min"}
	$D_{min}$ D_{"min"}
	$D_{max}$ D_{"max"}
Span	Counts
Span	$v_{min}$ v_{"min"}
Change	$v_{min}$ v_{"min"}

PASS: ☐ FAIL: ☐

Absolute (not relative) time shall be recorded.
Span: the result of subtraction of the indication at minimum test load from the indication at maximum test load. All span errors (error at maximum test load minus the error at minimum test load) shall be within the maximum permissible error during the 30 minute test.
The change of span must not exceed $v_{min}$ v_{"min"}.
Change: the difference between the span and the initial run span.
Maximum permissible change, mpc: the absolute value of the maximum permissible error for the maximum test load applied.
Exercises have to be run before disconnection.

Power voltage variation Form 6.12 Power voltage variation

R 60-1, 5.7.2.2, 5.7.2.3, 5.7.2.4
R 60-2, 2.10.7.4
R 60-3, 2.2.2

Application no.:

Load cell model:

Serial no.:

$E_{max}$ E_{"max"}: $E_{min}$ E_{"min"}:

$n_{LC}$ n_{"LC"}: $p_{LC}$ p_{"LC"}:

$Y$ Y: $Z$ Z:

$v_{min}$ v_{"min"}: DR:

Force-generating system:

Test load:, $D_{max}$ D_{"max"}: $D_{min}$ D_{"min"}:

Indicating instrument:

Evaluator:

	At start	At end
Date:
Temperature:			$°C$ "unitsml(degC)"
Relative humidity:			%
Barometric pressure:			$kPa$ "unitsml(kPa)"
Indicator temperature:			$°C$ "unitsml(degC)"

Conversion factor, $f$ f: counts/ $v$ v

Main voltage:

AC: DC:

Reference indications: if at 75 % load point was not obtained, a straight line interpolation between the adjacent higher and lower indication is used (see 2.8.2 in R 60-2 and calculation procedures in R 60-3, 2.1.2)
Error: the difference between the test indication and the reference indication divided by the conversion factor, $f$ f.
The change of span must not exceed $v_{min}$ v_{"min"}.
When a voltage range is marked, use the average value as the reference value and determine upper and lower values of applied voltage according to R 60-2, 2.10.7.4.
Upper limit not applicable to battery powered load cells
At lower limit, battery powered load cells shall function and be within MPE, or cease to function

Test load (units)	Preloads
Test load (units)	Indication (counts)	Time hh:mm:ss
$D_{min}$ D_{"min"}
$D_{max}$ D_{"max"}
$D_{min}$ D_{"min"}
$D_{max}$ D_{"max"}
$D_{min}$ D_{"min"}
$D_{max}$ D_{"max"}

		Initial run with main voltage		lower limit main voltage — 15 %		upper limit +10 %		mpc $v_{min}$ v_{"min"}
		Indication (counts)	Time hh:mm:ss	Indication (counts)	Time hh:mm:ss	Indication (counts)	Time hh:mm:ss	mpc $v_{min}$ v_{"min"}
	$D_{min}$ D_{"min"}
	$D_{max}$ D_{"max"}
Span	Counts
Span	$v_{min}$ v_{"min"}
Change	$v_{min}$ v_{"min"}

PASS: ☐ FAIL:☐

Short time power reductions Form 6.13 Short time power reductions

R 60-1, 5.7.2.5
R 60-2, 2.10.7.5
R 60-3, 2.2.3

Test load ( $g, kg, t$ "unitsml(g)", "unitsml(kg)", "unitsml(t)")	Disturbance				Result
	Amplitude (%)	Duration (cycles)	Number of disturbances	Repetition interval ( $v$ v)	Indication ( )	Difference ( )	Significant fault $> v_{min}$ > v_{"min"}
	Amplitude (%)	Duration (cycles)	Number of disturbances	Repetition interval ( $v$ v)	Indication ( )	Difference ( )	No	Yes (remarks)
Without disturbance
	0	0.5	10
	50	1	10

PASS: ☐ FAIL: ☐

Equipment used (supply sketch if necessary):

Remarks:

In the case of a voltage range, use the average value as the reference value.

Bursts (electrical fast transients) Form 6.14.1 Bursts (electrical fast transients) — power supply lines

R 60-1, 5.7.2.5
R 60-2, 2.10.7.6
R 60-3, 2.2.4

Power supply lines: test voltage = 2 kV; duration of test = 1 minute at each polarity

Connection			Polarity	Result
L to ground	N to ground	PE to ground		Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
L to ground	N to ground	PE to ground		Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
x			pos
			neg
without disturbance
	x		pos
			neg
without disturbance
		x	pos
			neg

PASS: ☐ FAIL: ☐

L = phase, N = neutral, PE = protective earth

Equipment used (supply sketch if necessary)

Form 6.14.2 Bursts (electrical fast transients) — I/O circuits and communications lines

R 60-1, 5.7.2.5
R 60-2, 2.10.7.6
R 60-3, 2.2.4

Cable interface	Polarity	Result
		Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
		Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
	pos
	neg
without disturbance
	pos
	neg
without disturbance
	pos
	neg
without disturbance
	pos
	neg
without disturbance
	pos
	neg
without disturbance
	pos
	neg

PASS: ☐ FAIL: ☐

Equipment used (supply sketch if necessary)

Remarks:

Explain or make a sketch indicating where the clamp is located on the cable: if necessary use additional page(s).

Surges Form 6.15 Surges

R 60-1, 5.7.2.5
R 60-2, 2.10.7.7
R 60-3, 2.2.5

OIML R 60-2, ……… [unit] ☐[g]; ☐[kg]; ☐[t];	Test conditions surges on signal, data and control lines					Observer’s name:
	Output gained	☐	using actual loads
			Test load:			Line to line 1 kV
		☐	simulating loading			Line to earth 2 kV
			using:
	Cable:					☐ Symmetrical line
	Date:			Start	Stop	☐ Unsymmetrical line
	Time:					Specimen:
	Ambient temperature			$°C$ "unitsml(degC)"	$°C$ "unitsml(degC)"	$f$ f
	Relative humidity			%	%	$D_{min}$ D_{"min"} [unit]
	Barometric Pressure			$kPa$ "unitsml(kPa)"	$kPa$ "unitsml(kPa)"	$D_{max}$ D_{"max"} [unit]
	Cycle phase		Initial	During exposure		After
	Load
Time	Start
	Stop
Quantity [unit]	reference
	indicated
Error [ $v_{min}$ v_{"min"}]
relative error [%] $E_{ii}$ E_{"ii"}
MPE [%]
	Pass		☐			☐
	Fail		☐			☐
Observed faults after exposure
Fault limit [%]			………….
Line to line (N/A for balanced)			Fault/Deviation	Significant		Acts on fault
↑ ▇	↓ ▇			Yes	No	Yes	No
3x				☐	☐	☐	☐
	3x			☐	☐	☐	☐
Line to earth
3x				☐	☐	☐	☐
	3x			☐	☐	☐	☐
Observations ‌ ‌ ‌ ‌
Result				Pass	☐	Fail	☐

Electrostatic discharge Form 6.16.1 Electrostatic discharge — direct application

R 60-1, 5.7.2.5
R 60-2, 2.10.7.8
R 60-3, 2.2.6

			Result
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
2
4
6
8 (air discharges)

PASS: ☐ FAIL: ☐

Remarks:

If the load cell fails, the test point at which this occurs shall be recorded.

IEC Publication 61000-4-2 Ed 2.0 (2008-12) Consolidated edition specifies that the test be conducted with the most sensitive polarity.

Form 6.16.2 Electrostatic discharge — indirect application

R 60-1, 5.7.2.5
R 60-2, 2.10.7.8
R 60-3, 2.2.6

Horizontal coupling plane

			Result
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
2
4
6

Vertical coupling plane

			Result
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
Test voltage ( $kV$ "unitsml(kV)")	No. of discharges $\geq 10$ >= 10	Repetition interval ( $s$ s)	Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
2
4
6

PASS: ☐ FAIL: ☐

Remarks:

If the load cell fails, the test point at which this occurs shall be recorded.

IEC Publication 61000-4-2 Ed. 2.0 (2008-12). Consolidated edition specifies that the test be conducted with the most sensitive polarity.

Form 6.16.3 Electronic discharge (continued) — specification of test points

R 60-1, 5.7.2.5
R 60-2, 2.10.7.8
R 60-3, 2.2.6

Specify test points utilised on load cell and test equipment used, e.g. by photos or sketches.

Direct application

Contact discharges:

Air discharges:
Indirect application

Electromagnetic susceptibility Form 6.17.1 Electromagnetic susceptibility

R 60-1, 5.7.2.5
R 60-2, 2.10.7.9
R 60-3, 2.2.7

Disturbance				Result
Antenna	Frequency range (MHz)	Polarisation	Facing load cell	Indication ( )	Difference ( $v$ v)	Significant fault $> v_{min}$ > v_{"min"}
Antenna	Frequency range (MHz)	Polarisation	Facing load cell	Indication ( )	Difference ( $v$ v)	No	Yes (remarks)
without disturbance
		Vertical	Front
			Right
			Left
			Rear
		Horizontal	Front
			Right
			Left
			Rear

PASS: ☐ FAIL: ☐

Frequency range: $80 MHz$ 80 "unitsml(MHz)"

The lower limit of frequency of electromagnetic field is 26 MHz for load cells without power lines or I/O ports, and for which the test for conducted electromagnetic field (R 60-2, 2.10.7.10) is not applicable.

3000 MHz

3000 "unitsml(MHz)"

Field strength: $10 V m^{- 1}$ 10 "unitsml(V/m)"

Modulation: 80 % AM, $1 kHz$ 1 "unitsml(kHz)" sine wave

Remarks:

If the load cell fails, the test point at which this occurs shall be recorded.

Form 6.17.2 Electromagnetic susceptibility (continued) — description of the test setup

Describe the setup of the test and equipment, e.g. by photos or sketches:

Immunity to conducted electromagnetic fields Form 6.18 Immunity to conducted electromagnetic fields

R 60-1, 5.7.2.5
R 60-2, 2.10.7.10
R 60-3, 2.2.8

OIML R 60-2, …….. [unit] ☐ [g]; ☐ [kg]; ☐ [t]	test conditions rf current injection					Observer’s name:
	output gained	☐	using actual loads
			Test load:			$f_{l} = MHz$ f_{"l"} = quad quad quad "unitsml(MHz)"
		☐	simulating loading			$f_{h} = MHz$ f_{"h"} = quad quad quad "unitsml(MHz)"
			using:			RF voltage $v_{emf}$ v_{"emf"}
	Cable exposed					Modulation % AM
	Date:			Start	Stop	Dwell time $s$ "unitsml(s)"
	Time:					Specimen:
	Ambient temperature			$°C$ "unitsml(degC)"	$°C$ "unitsml(degC)"	$f$ f
	Relative humidity			%	%	$D_{min}$ D_{"min"} [unit]
	Barometric pressure			$kPa$ "unitsml(kPa)"	$kPa$ "unitsml(kPa)"	$D_{max}$ D_{"max"} [unit]
Frequency cycle	Cycle phase		Initial	During exposure		After
	Load
Time	Start
	Stop
Quantity [unit]	reference
	indicated
Error [ $v_{min}$ v_{"min"}]
relative error [%] $E$ E
MPE [%]
	Pass		☐			☐
	Fail		☐			☐
Observed faults during exposure
Fault limit [%]			…………….
Frequency			Fault/Deviation	Significant		Acts on fault
MHz				Yes	No	Yes	No
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
				☐	☐	☐	☐
Observations ‌ ‌ ‌ ‌ ‌
Result				Pass	☐	Fail	☐

Span stability Form 6.19.1 (3 runs) Span stability — measurement data for classes C and D

R 60-1, 5.7.2.6
R 60-2, 2.10.7.11
R 60-3, 2.2.9

Span is the result of subtracting the average indication at minimum test load from the average indication at maximum test load.
Absolute (not relative) time shall be recorded.

Measurement no. 1:

Run no. 1		Run no. 2		Run no. 3		Average indication ( )
Indication ( )	Time	Indication ( )	Time	Indication ( )	Time	Average indication ( )


					span