The SCS 770033 Calibration Unit is designed to verify whether a tester is operating within specifications. This product can be used as one of the tools to fulfill the ANSI/ESD S20.20 paragraph 6.1.3.2 ‘Compliance Verification Plan'. The 770033 Calibration Unit is a passive device and requires no power source. The Calibration Unit is manufactured with industry-accepted test ranges for both wrist straps and foot grounders. The wrist strap pass range is set at 750K - 10M, while the foot ground test range is set at 750K - 100M. The SCS Calibration Unit is calibrated to NIST traceable standards.