The frequency of re-calibration 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. Use the SCS 770769 Limit Comparator to perform 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.

*Dual Combination Tester units with serial numbers ending in 2326001 or greater include firmware that allows field calibration of the 1 gigohm footwear test limit when needed.

Note: 

NIST Calibrated - Original Calibration Certificate can be Downloaded Here - Calibrated with accepted procedures and standards traceable to the National Institute of Standards and Technology. For more information on the calibration of SCS products, see Calibration.