OIML R 60-2 • Metrological controls and performance tests

2.8.3.2 Adherence to loading/unloading times

When the specified loading or unloading times cannot be achieved, the applicant for evaluation should be consulted and the following shall apply:

  1. In the case of the minimum dead load output return test, the time may be increased from 100 % to a limit of 150 % of the specified time provided that the permissible variation of the result is proportionally reduced from 100 % to 50 % of the allowable difference between the initial reading of the minimum load output upon unloading and the reading before loading.

    For example:

    1. A change in load of 10 kg for class C and D load cells, loading (or unloading) time (approximately 5 s) is increased to 7.5 s (150 % of 5 s), MPE is reduced to 50 %; or

    2. A change in load of 1500 kg for class C and D load cells, loading (or unloading) time (approximately 20 s) is increased to 25 s (125 % of 20 s), MPE is reduced to 75 %.

  2. In all cases, the actual times shall be recorded in the Test report.