The SCS 770751 Limit Comparator performs periodic verification (once every 6-12 months) of the SCS 770758 Dual Combination Tester. The Limit Comparator can be used to check the test limits of the Dual Combination Tester without removing it from the factory floor.

The frequency of recalibration should be based on the critical nature of those ESD-sensitive items handled and the risk of failure for the ESD protective equipment and materials. In general, SCS recommends that calibration be performed annually.