"Fluke 1507 (10 GΩ) and 1503 (2 GΩ) electrical insulation testers are compact, rugged, reliable and easy-to-use. Their multiple test voltages make them instruments of choice for troubleshooting, commissioning and preventative maintenance applications. The remote probe helps save time and money when performing tests.Insulation test range 0.01 MΩ to 10 GΩ (1507), 0.1 MΩ to 2 GΩ (1503). Insulation test voltages 500 V, 1000 V (1503 only), 50 V, 100 V, 250 V (both models). Automatic calculation of Polarisation Index and Dielectric Absorption Ratio (1507). Compare (Pass\/Fail) function (1507). Repetitive or hard-to-reach testing easy with the remote test probe. For added user protection, live circuit detection prevents insulation test if voltage > 30 V is detected . Auto-discharge of capacitive voltage for added user protection. AC\/DC voltage 0.1 V to 600 V. 200 mA continuity. Resistance 0.01 Ω to 20.00 kΩ. Auto power off. Large, backlit display. CAT IV 600 V overvoltage category rating. Remote probe, test leads, probes and alligator clips included with each tester. Accepts optional Fluke TPAK magnetic hanging system. Four AA alkaline batteries (NEDA 15 A or IEC LR6) for at least 1000 insulation teTester Type = Insulation Resistance TesterMinimum Test Voltage = 500VMaximum Test Voltage = 1000VMaximum Insulation Resistance Measurement = 2GOhmsDisplay Type = Graphic Display - BacklitCalibrated = RSCALTest Current = 200mAMinimum Operating Temperature = -20°CMaximum Operating Temperature = +55°CPower Source = Battery"