[shortdesc] Fluke 1503 is a compact insulation resistance tester offering 500 V and 1000 V test voltages, a wide resistance range up to 2000 MΩ, and built-in live circuit detection for safe residential and commercial testing [/shortdesc] [specifications] [/specifications] FLUKE-1503 Insulation Resistance Meter The Fluke 1503 Insulation Resistance Meter is a rugged and easy-to-use tool ideal for residential and commercial electricians. It supports insulation testing from 0.01 MΩ to 2000 MΩ using two selectable test voltages (500 V and 1000 V). The device includes live circuit detection that prevents testing when voltages exceed 30 V for added safety. With a built-in remote test probe, the 1503 simplifies repetitive testing and enhances user convenience. It also features AC/DC voltage measurement up to 600 V, low-ohms continuity testing with 200 mA, auto-discharge of capacitive voltage, and a large backlit display for better readability in all environments. Key Features: Insulation Resistance Testing: Measures from 0.01 MΩ to 2000 MΩ using 500 V and 1000 V test voltages. Live Circuit Detection: Automatically disables insulation testing if terminal voltage exceeds 30 V. Continuity Testing: Provides lo-ohms testing with a 200 mA short-circuit current. AC/DC Voltage Measurement: Measures from 0.1 V to 600 V with ±(2% + 3) accuracy. Safety Rated: CAT IV 600 V overvoltage protection for enhanced operational safety. Remote Test Probe: Included probe allows easier operation in tight or repetitive test scenarios. Backlit Display: Large, clear screen for reliable readings even in dim workspaces. Battery Efficiency: Performs at least 1000 insulation tests or 2500 resistance tests on 4 AA batteries. Technical Specifications: Insulation Resistance Range: 0.01 MΩ to 2000 MΩ Test Voltages: 500 V, 1000 V Insulation Accuracy: ±(1.5% + 5) to 2000 MΩ, ±(10% + 3) above 2000 MΩ AC/DC Voltage Range: 0.1 V to 600 V Earth Bond Resistance: 0.01 Ω to 20.00 kΩ Continuity Test Current: >200 mA Auto Discharge: