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includes Traceable Certificate

Fluke 1507-NIST Insulation Tester, includes Traceable Certificate

Model: 1507-NIST

Ideal for electrical contractors and industrial and commercial electricians, this insulation resistance tester also comes in a compact and rugged design and is easy to use.

$754.99 USD

3 Days
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Fluke 1507-NIST Offers

Ideal for advanced industrial and electrical insulation testing, this insulation tester comes in a compact design and features versatility. Additionally, the multiple test voltages facilitate the tool for many troubleshooting, commissioning, and preventative maintenance applications.

Take advantage of the full feature set to easily and quickly perform advanced insulation resistance testing. Its handy size and lightweight make it easy to pack and use. Additional features, like the remote probe, save both time and money, especially when performing repetitive tests.

This product includes a Traceable Certificate with full Data and Uncertainties.


  • Rugged, compact advanced insulation resistance tester for electrical contractors and industrial and commercial electricians
  • Automatically calculates polarization index and dielectric absorption ratio
  • Makes repetitive tests simple and easy with a compare (pass/fail) function
  • Offers multiple insulation test voltages: 50, 100, 250, 500, and 1000 V
  • Performs insulation tests from 0.01 MΩ to 2.0 GΩ
  • Includes live circuit detection to prevent insulation test if voltage >30 V is detected
  • Includes auto-discharge of capacitive voltage for added user protection
  • Measures AC/DC voltage from 0.1 to 600 V and resistance from 0.01 Ω to 20.00 kΩ
  • 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 over voltage category rating
  • Runs on four AA alkaline batteries (NEDA 15 A or IEC LR6) for at least 1000 insulation tests
6 Tips for effective insulation testing

Disconnect any electronic devices like motor drives, PLC’s, transmitters, etc. before performing insulation testing. Electronics can be damaged by applying higher than normal voltage.


The effect of temperature should be considered - it is recommended that tests be performed at a standard conductor temperature of 20 °C (68 °F) or that a temperature baseline is established while compensating future readings by using a DMM with a probe or an infrared thermometer.


Select a test voltage appropriate for the insulation being tested. The objective is to stress the insulation but not to over-stress it. When in doubt, use a lower test voltage. It’s usually appropriate to test insulation at twice the voltage it normally sees: for example 460 V to 600 V rated equipment is often tested at 1000 V.


When using an insulation tester, leave the leads connected when you stop the test. The insulation tester can discharge any residual test voltage.


Conductors that are close to each other have a normal capacitance. This will cause an insulation resistance reading to start low and increase steadily until it stabilizes. This type of increase is normal, but if the reading jumps violently down and up again this indicates arcing.


Although the current is tightly limited, an insulation tester can generate sparks and minor but painful burns. The unexpected surprise can cause an operator to jerk away. As always, work away from live systems and use safe work practices when working overhead.

Insulation Resistance Testing Solutions

Fluke 1507-NIST Specifications

AC/DC Voltage Specifications
Range 600.0 V
Resolution 0.1 V
Accuracy 50 Hz to 400 Hz: ±(2% of rdg + 3 digits)
Input Impedance 3 MΩ (nominal), < 100 pF
Common Mode Rejection Ratio (1 kΩ unbalanced) >60 dB at DC, 50 or 60 Hz
Overload Protection 600 V RMS or DC
Earth Bond Resistance Specifications
Range 20.00 Ω to 20.00 kΩ
Resolution 0.01 Ω to 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 Specifications
Measurement Range 0.01 MΩ to 10 GΩ
Test Voltage 50, 100, 250, 500, 1000 V
Test Voltage Accuracy +20%, -0%
Short Circuit Current 1 mA nominal
Auto Discharge Discharge time <0.5 second for C = 1 µF or less
Live Circuit Indicator Inhibit test if terminal voltage >30 V prior to initialization of test
Maximum Capacitive Load Operable with up to 1 µF load
Live Circuit Detection Inhibit test if terminal voltage > 30 V prior to initialization of test
Maximum Capacitive Load Operable with up to 1 µF load
Measure Accuracy 50 V: ±(3% + 5)
100 V: ±(3% + 5)
250 V: ±(3% + 5)
500 V: ±(3% + 5)
1000 V: ±(3% + 5) to 2000 MΩ, ±(10% + 3) above 2000 MΩ
Click here for complete specifications on the Fluke 1507-NIST

What's included with the Fluke 1507-NIST

  • Insulation Resistance Tester
  • Traceable Certificate with full Data and Uncertainties
  • Remote probe
  • Test leads
  • Test probes
  • Alligator clips
  • User documentation
Fluke 1587 FC Insulation Multimeter Fluke 1577 Insulation Multimeter Fluke 1503 Insulation Resistance Meter Fluke 1507 Insulation Resistance Tester Fluke 1550C Insulation Resistance Tester Fluke 1555 Insulation Resistance Tester
Two in one tools Stand-alone tools
Insulation test features 1587 FC 1577 1503 1507 1550C 1555
Test voltages 50 V, 100 V, 250 V, 500 V, 1000 V 500 V, 1000 V 500 V, 1000 V 50 V, 100 V, 250 V, 500 V, 1000 V 250 V to 5000 V 250 V to 10,000 V
Insulation resistance range 0.01 MΩ to 2 GΩ 0.01 MΩ to 600 GΩ 0.01 MΩ to 2000 GΩ 0.01 MΩ to 10 GΩ 250 kΩ to 1 TΩ 250 kΩ to 2 TΩ
Auto discharge
Timed ramp test (Breakdown)
Pass/fail comparison
Est. # of IRT tests 1000 1000 2000 2000 Various Various
Voltage > 30 V warning
Memory With Fluke Connect App
Remote test probe
Lo ohms/earth-bond continuity 200 mA source (10 mΩ resolution) 200 mA source (10 mΩ resolution)
Display Digital LCD Digital LCD Digital LCD Digital LCD Digital LCD/ analog display Digital LCD/ analog display
Multimeter features
AC/DC volts

Note: Not all product features and specifications are listed in this table. For more complete information, see individual product data sheets.

1. Function useful for checking connections and motor windings. Also useful for users who are required to perform earth-bond continuity measurements during installation testing.
2. Filter for variable-speed motor drive measurements.

Continuity beeper
Temperature (contact)
Lo-pass filter2
Diode test
Other features
Software Fluke Connect compatible FlukeView® Forms Basic Fluke View® Forms Basic
Battery 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) Rechargeable Rechargeable
Find out more about insulation testing

How to Operate a Fluke 1507 Insulation Resistance Tester to Run PI and DAR Test

This video covers the difference between the polarization index and dielectric aspect ratio tests when using the insulation resistance tester. With their multiple test voltages, this tool makes it ideal for many troubleshooting, commissioning, and preventative maintenance applications.


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Customer Reviews for the Fluke 1507-NIST