... temperature test function, used for HVAC professional, can help the specialist to discover the problem in heating, ventilates equipment, HVAC and flame detector. Fluke ... on.Features:White LED Backlight; AC voltage: 0.100 V to 600 V ac rms (ac true-rms), frequency: 5 ... ohm; Diode test and beeper warning; Temperature range from -40C to 400C (-40F to 752F, including thermocouple) Capacitor test from 1 nF ...