Datasheet
PRODUCT DATASHEETPRODUCT DATASHEET
MG310 Compact 
Digital Insulation Tester
Compact Insulation Resistance Tester allows 
quick and easy testing/troubleshooting of 
motors, transducers, and other industrial 
appliances. Wide range measurement up 
to 1000V with Insulation Resistance to 
5.5GΩ. Includes an easy snap on protective 
hard cover and soft pouch to conveniently 
transport your meter and accessories to the 
next job site or to safely store away.
Features
•  Test Voltages of 250V, 500V, and 1000V
•  Measure Insulation Resistance to 5.5GΩ (autoranging)
•  AC Voltage measurement from 30 to 600V
•  Polarization Index measurement (PI)
•  Dielectric Absorption Ratio measurement (DAR)
•  10MΩ internal resistance test
•  Low Resistance measurement with Zero function
•  Continuity beeper
•  Large 2000 count dual display with backlight 
•  High voltage and overload indication
•  Auto-discharge and voltage output warning functions
•  Low battery indication 
•  Complete with test leads, alligator clips, 6 x AA 
batteries, hard cover, and soft carrying case
Ordering 
MG310 .............. Digital Insulation Tester (1kV/5.5GΩ)
www.extech.com
Specifications subject to change without notice. Copyright © 2015 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form. 
Rev. 11/25/15
Specifications
Range Basic Accuracy
Test Voltage 250V/500V/1000V
Insulation Resistance (autoranging) 0.00 to 99.9MΩ , 100M to 5.5GΩ ±5% of reading
AC Voltage 30 to 600V ±2% of reading
Resistance 0.00 to 200Ω ±2% of reading
Dimensions 6 x 4 x 2.8" (150 x 100 x 71mm) 
Weight 1.5lbs (0.7kg)
UPC Code: 793950380109

