OIML R 60-1 • Metrological and technical requirements

5.3.2 Type evaluation

The MPE (see 3.7.10) on type evaluation shall be the values derived using the expressions contained in the left column of Table 4. The apportioning factor, shall be chosen and declared (if other than 0.7) by the manufacturer and shall be in the range of 0.3 to 0.8: ()1), where “m” is the value (expressed in mass) representing the force introduced by the load applied.

Table 4 — Maximum Permissible Errors (MPE) on type evaluation

MPE (+/-)

Load,

Class A

Class B

Class C

Class D

The value of the apportioning factor, shall appear on the OIML certificate, if the value is not equal to 0.7. If the apportioning factor, is not specified on the certificate then the value 0.7 shall be assumed. The maximum permissible error may be positive or negative and is applicable to both increasing and decreasing loads.

The limits of error shown include errors due to non-linearity, hysteresis and temperature effect on sensitivity over certain temperature ranges, specified in 5.6.1.1 and 5.6.1.2. Further errors, not included in the Table 4 limits of error, are treated separately.