OIML R 60-2 • Metrological controls and performance tests

2.10.7.4 Power voltage variations

This test is applied to verify compliance with R 60-1, 5.7.2.2, R 60-1, 5.7.2.3, and R 60-1, 5.7.2.4 under conditions of variations in voltage to the load cell’s power supply.

Applicable standards:

For load cells powered by AC mains: IEC/TR3 61000-2-1 [13], IEC 61000-4-1 (set-up) [14]

For load cells powered by DC mains: IEC 61000-4-29 [15], IEC 61000-4-1 (set-up) [14]

Test method

Subject load cell to variations of power supply voltage

Test conditions

In accordance with 2.7.3.1 Environmental conditions

Preconditioning of load cell

Stabilise load cell under constant environmental conditions

Test level

Mains power voltage variations:

  • upper voltage limit ();

  • lower voltage limit ()

Battery power voltage variations:

  • upper voltage limit (not applicable);

  • lower power voltage: (specified by the manufacturer, below )

The voltage, () is the value specified by the manufacturer. If a range of reference mains power voltage () is specified, then the test shall be performed at an upper voltage limit of and a lower voltage limit of .

Test procedure in brief

This test consists of subjecting the load cell to variations of power voltage.

A load test is performed in accordance with 2.10.1.1 to 2.10.1.12 at (, with the load cell powered at reference voltage. The test is repeated with the load cell powered at the upper limit and at the lower limit of power voltage.