Fieldpiece Digital Megohm Meter

Overview: The Fieldpiece Digital Megohm Meter, model SMG5, is a compact standalone meter designed for checking HVAC compressor insulation. The SMG5 provides a 1000V voltage source, monitors current, and displays the resistance between the test points. Maximum current output is <1mA. It can be used to determine the condition of insulation from winding to ground in a motor, compressor, or transformer. Includes a case, alligator clip lead tip and leads with removable tips. How Does it Work? Disconnect the windings and measure the resistance between the windings and ground through the insulation. Determine what a "good" reading is by comparing your reading to values supplied by the manufacturer of the equipment or from your own experience. Noticing decreasing insulation resistance levels can forecast problems before catastrophic failure. Why a Digital Multimeter (DMM) Often Isn't Enough To test resistance, a DMM supplies low voltage (<1V) to the test points and is capable of delivering only a few milliamps. It...