... used for HVAC professional, can help the specialist to discover the problem in heating, ventilates equipment, ... LED Backlight; AC voltage: 0.100 V to 600 V ac rms (ac true-rms), frequency ... beeper warning; Temperature range from -40C to 400C (-40F to 752F, including thermocouple) Capacitor test from 1 ... UL 6101B (2003) and IEC/EN 61010-1 2nd Edition for measurement Category III, 600 V, Pollution Degree ...