Fluke 1503 Insulation Resistance Tester

Model: 1503

Compact, rugged, reliable and easy to use 500V/1000V insulation tester designed for troubleshooting, commissioning and preventative maintenance applications.

Add In House NIST Traceable Calibration to your 1503

$449.99 USD

was $499.99

Availability: 2 in Stock


Fluke 1503 Offers

Ideal for many preventative maintenance, commissioning, and troubleshooting applications.


  • Live circuit detection prevents insulation test if voltage > 30 V is detected for added user protection
  • Auto-discharge of capacitive voltage for added user protection
  • Save battery power with auto power off
  • Read measurements easily with large, backlit display
  • CAT IV 600 V overvoltage category rating for added user protection
  • Remote probe, test leads, probes and alligator clips included with each tester
  • Accepts optional Fluke TPAK magnetic hanging system to free your hands for other work
  • Four AA alkaline batteries (NEDA 15 A or IEC LR6) for at least 1000 insulation tests

Fluke 1503 Specifications

AC/DC Voltage Specifications
Range 600.0V
Resolution 0.1V
Accuracy 50 Hz to 400 Hz: ±(2% of rdg + 3 digits)
Input Impedance 3MΩ (nominal), < 100pF
Common Mode Rejection Ratio (1kΩ unbalanced) > 60dB at DC, 50 or 60Hz
Overload Protection 600V RMS or DC
Earth Bond Resistance Specifications
Range 20.00Ω to 20.00kΩ
Resolution 0.01Ω to 0.01kΩ
Accuracy ±(1.5% + 3 digits)
Overload Protection 2V RMS or DC
Open Circuit Test Voltage > 4.0V, < 8V
Short Circuit Current > 200.0mA
Insulation Specifications
Output Voltages 500 to 1000V (0 to 20%)
Test Currents 1mA at 500kΩ to 1MΩ
Measurement Range 0.01MΩ to 2000MΩ
Test Voltages 50V, 100V, 250V, 500V, 1000V
Test Voltage Accuracy +20%, -0%
Short-Circuit Test Current 1mA nominal
Auto Discharge Discharge time < 0.5 second for C = 1µF or less
Live Circuit Detection Inhibit test if terminal voltage > 30V prior to initialization of test
Maximum Capacitive Load Operable with up to 1µF load
Click here for complete specifications on the Fluke 1503

What's included with the Fluke 1503

  • 1503 Insulation Tester
  • Remote probe
  • Test leads
  • Test probes
  • Alligator clips
  • User documentation


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