Description

Description

Fluke 1503 Insulation Resistance Tester, 500V/1000V Test Voltages

Handles all the basic insulation testing needs

The Fluke 1503 Insulation Resistance Tester delivers the essential testing capabilities electricians need to verify insulation integrity, troubleshoot wiring systems, and help maintain safe electrical installations. Designed for residential, commercial, and light industrial applications, this rugged handheld meter performs insulation resistance testing up to 2000 MΩ with selectable 500V and 1000V test voltages. Built on Fluke's trusted platform, the 1503 combines dependable performance, simple operation, and a compact design that's easy to carry from job to job, making it a practical choice for everyday insulation testing and preventive maintenance.

Key Features & Benefits

A rugged, compact insulation resistance tester for residential and commercial electricians
Performs insulation tests from 0.01 MΩ to 2000 MΩ
Offers two insulation test voltages: 500 V and 1000 V
Measures resistance from 0.01 Ω to 20.00 kΩ
Measures AC/DC voltage from 0.1 V to 600 V
Includes auto-discharge of capacitive voltage for added user protection
Provides lo-ohms earth-bond continuity (200 mA)
Simplifies repetitive or hard-to-reach testing with the remote test probe
Saves battery power with auto power off
Presents results on a large, backlit display
Features CAT IV 600 V overvoltage category rating
Comes with remote probe, test leads, test probes, alligator clips, and one-year warranty
Accepts optional Fluke TPAK magnetic hanging system to free your hands for other work
Runs on four AA alkaline batteries (NEDA 15A or IEC LR6) for at least 1,000 insulation tests

Specs

Fluke 1503 Insulation Resistance Meter Specs
AC/DC Voltage Measurement
Range	600.0 V
Resolution	0.1 V
Accuracy, 50 Hz to 400 Hz	±(2% of Reading + 3 Digits)
Input Impedance	3 MΩ nominal, <100 pF
Common Mode Rejection Ratio	>60 dB at DC, 50 Hz, or 60 Hz with 1 kΩ unbalanced
Overload Protection	600 V RMS or DC
Earth-Bond Resistance Measurement
Range and Resolution	20.00 Ω at 0.01 Ω 200.0 Ω at 0.1 Ω 2,000 Ω at 1.0 Ω 20.00 kΩ at 0.01 kΩ
Accuracy	±(1.5% + 3 Digits)
Overload Protection	2 V RMS or DC
Open-Circuit Test Voltage	>4.0 V, <8 V
Short-Circuit Current	>200.0 mA
Insulation Measurement
Measurement Range	0.01 MΩ to 2,000 MΩ
Test Voltages	500 V and 1,000 V
Test Voltage Accuracy	+20%, -0%
Short-Circuit Current	1 mA nominal
Auto Discharge	Discharge time under 0.5 second for capacitance of 1 µF or less
Live-Circuit Indicator	Inhibits testing if terminal voltage is greater than 30 V before test initialization
Maximum Capacitive Load	Operable with loads up to 1 µF
Measurement Accuracy at 500 V	±(1.5% + 5 Digits)
Measurement Accuracy at 1,000 V	±(1.5% + 5 Digits) to 2,000 MΩ; ±(10% + 3 Digits) above 2,000 MΩ
General Specifications
Maximum Voltage Applied to Any Terminal	600 V AC RMS or DC
Storage Temperature	-40°C to 60°C (-40°F to 140°F)
Operating Temperature	-20°C to 55°C (-4°F to 131°F)
Temperature Coefficient	0.05 x specified accuracy per °C at temperatures below 18°C or above 28°C (below 64°F or above 82°F)
Relative Humidity	0% to 95% at 10°C to 30°C (50°F to 86°F) 0% to 75% at 30°C to 40°C (86°F to 104°F) 0% to 40% at 40°C to 55°C (104°F to 131°F)
Vibration	Random, 2 g, 5 Hz to 500 Hz per MIL-PRF-28800F, Class 2 instrument
Shock Resistance	1 m drop per IEC 61010-1, 2nd Edition; six sides on an oak floor
Electromagnetic Compatibility	In an RF field of 3 V/m, accuracy equals specified accuracy per EN 61326-1:1997
Safety Rating	CAT IV 600 V
Safety Compliance	ANSI/ISA 82.02.01 (61010-1) 2004, CAN/CSA-C22.2 No. 61010-1-04, and IEC/EN 61010-1, 2nd Edition
Certifications	CSA per CSA/CAN C22.2 No. 61010.1-04; TUV per IEC/EN 61010-1, 2nd Edition
Batteries	Four AA alkaline batteries (NEDA 15A or IEC LR6)
Battery Life - Insulation Testing	At least 1,000 tests at 1,000 V into 1 MΩ, with 5 seconds on and 25 seconds off
Battery Life - Resistance Measurement	At least 2,500 earth-bond resistance measurements at 1 Ω, with 5 seconds on and 25 seconds off
Dimensions (H x W x L)	1.97 x 3.94 x 8.00 in (5.0 x 10.0 x 20.3 cm)
Weight	1.2 lb (550 g)
IP Rating	IP40
Operating Altitude	2,000 m at CAT IV 600 V; 3,000 m at CAT III 600 V
Storage Altitude	12,000 m
Over-Range Capability	110% of range
Included Accessories	TL224 Test Leads, TP74 Test Probes, red and black alligator clips, holster, and remote probe