The Desco 19270 Combo Tester X3 verifies the functionality of personnel grounding devices (wrist straps1 , foot grounders, ESD shoes, smocks2 ). The Desco 19270's three independent tests are performed simultaneously on the wrist strap and each foot. The Desco 19270's green lights indicate a pass condition whereas Red and yellow lights plus an audible alarm indicate when the wrist strap and/or footwear (left or right) have failed. The Desco 19270's DIP switches may be accessed for test limit preferences. The Desco 19270 access control to an ESD Protected Area can be further enforced by using the relay terminal on the Combo Tester X3 and connecting it to an electronic door lock or turnstile to grant access only to those who have passed their personal grounding device tests. The Desco 19270 is calibrated to NIST standards and includes a certificate.