

Features
- Full range scale up to 1000 Megohms
- Zone scale to indicate condition ofinsulation
- Impact resistant thermoplastic case
- Operating manual included
- Light and small, reduce the burden of work, equipped with portable soft bag, easy to carry
M500 Megohmmeter Tester
This reliable, battery operated instrument,complete with LED indicators, will accurately measure insulation values up to 1000 megohms at 500 volts and also indicate the condition of insulation on the zone scale.
- Remove ALL wires that are connected to the terminals that are to be tested
- Attach one test lead from the megohmmeter to ANY WINDING TERMINAL andthe other test lead to the METAL CASE of the motor Make sure the point ofcontact is clean to the BARE METAL (no paint)
- Depress “POWER" button, wait approximately 10 seconds then proceed toread the insulation value shown on the corresponding illuminated LED lamp


Engineered for professional technicians, the M500 Megohmmeter combines precision, durability, and ease of use. Its clear LED scale with "Bad/Caution/Good" zones lets you quickly assess insulation health at a glance, while the impact-resistant ABS casing stands up to daily wear and tear in any work environment.


- Motors and Appliances
Inspect winding insulation on all types of motors and household appliances to prevent unexpected downtime and safety hazards.
- Hermetic Refrigeration & A/C Compressors
The go-to tool for HVAC and refrigeration technicians, designed to test compressors in oil and refrigerant environments.
- Relay Control Circuits
Quickly verify insulation integrity in relay panels and control circuits to avoid malfunctions caused by moisture or aging.
- Panelboards
Perform fast, reliable insulation checks on distribution boards and panelboards for routine maintenance and troubleshooting.
M500 Insulation Tester / Megohmmeter Standard Specifications
![]() ECM Motor Diagnostic Tool, Compatible with Genteq TecMate Pro - ECM Tool | ![]() ECM Tester: ECMPRO, ECM Motor Tester Ideal for Diverse Electronically Commuta... | ![]() M500 Insulation Tester MEGOHMMETER, Compatible with Supco M500 Electronic Meg... | ![]() Upgrade Version Semiconductor Tester, Compatible with DCA55 Semiconductor Ana... | ![]() Mark II 25 Liquid Filled Manometer Inspired by Dwyer Ideal for HVAC and Gener... | |
|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — |
| Price | — | — | — | — | — |
| Primary Function | ECM motor fault diagnosis & status analysis | Comprehensive ECM motor performance testing | Insulation resistance & compressor safety testing | Semiconductor component testing & parameter analysis | HVAC pressure measurement & airflow verification |
| Core Features | Auto motor fault detection, real-time status feedback, dedicated motor interface | One-click testing, multi-motor compatibility, robust diagnostic algorithms | 1000 Megohms at 500V test range, multi-function multimeter mode, compressor testing | Auto pinout detection, automatic component identification, full parameter measurement | 3% accuracy, liquid-filled design, shock-resistant, 3" w.c. range |
| Operation Mode | Plug-and-play connection, guided diagnostic workflow | Simple hook-up with test leads, one-touch test cycle | Analog-style readout with clear scale markings, manual test mode | Automatic test mode, no manual pin configuration required | Manual installation, direct pressure reading, no power required |
M500 Megohmmeter Tester

Features
- Full range scale up to 1000 Megohms
- Zone scale to indicate condition ofinsulation
- Impact resistant thermoplastic case
- Operating manual included
- Light and small, reduce the burden of work, equipped with portable soft bag, easy to carry

This reliable, battery operated instrument,complete with LED indicators, will accurately measure insulation values up to 1000 megohms at 500 volts and also indicate the condition of insulation on the zone scale.
- Remove ALL wires that are connected to the terminals that are to be tested
- Attach one test lead from the megohmmeter to ANY WINDING TERMINAL andthe other test lead to the METAL CASE of the motor Make sure the point ofcontact is clean to the BARE METAL (no paint)
- Depress “POWER" button, wait approximately 10 seconds then proceed toread the insulation value shown on the corresponding illuminated LED lamp


Engineered for professional technicians, the M500 Megohmmeter combines precision, durability, and ease of use. Its clear LED scale with "Bad/Caution/Good" zones lets you quickly assess insulation health at a glance, while the impact-resistant ABS casing stands up to daily wear and tear in any work environment.


- Motors and Appliances
Inspect winding insulation on all types of motors and household appliances to prevent unexpected downtime and safety hazards.
- Hermetic Refrigeration & A/C Compressors
The go-to tool for HVAC and refrigeration technicians, designed to test compressors in oil and refrigerant environments.
- Relay Control Circuits
Quickly verify insulation integrity in relay panels and control circuits to avoid malfunctions caused by moisture or aging.
- Panelboards
Perform fast, reliable insulation checks on distribution boards and panelboards for routine maintenance and troubleshooting.
M500 Insulation Tester / Megohmmeter Standard Specifications
| Product Type | Insulation Resistance Tester (Megohmmeter) |
| Model Number | M500 |
| Indicator Range | 20 to 1000 Megohms |
| Applied Test Voltage | 500 Volts DC |
| Display Type | LED Indicators with Zone Scale |
| Power Source | 2 "C" Size Batteries (Included in the package) |
| Case Material | High-Impact Resistant Thermoplastic |
| Test Leads | (2) 6" Long Test Leads |
![]() ECM Motor Diagnostic Tool, Compatible with Genteq TecMate Pro - ECM Tool | ![]() ECM Tester: ECMPRO, ECM Motor Tester Ideal for Diverse Electronically Commuta... | ![]() M500 Insulation Tester MEGOHMMETER, Compatible with Supco M500 Electronic Meg... | ![]() Upgrade Version Semiconductor Tester, Compatible with DCA55 Semiconductor Ana... | ![]() Mark II 25 Liquid Filled Manometer Inspired by Dwyer Ideal for HVAC and Gener... | |
|---|---|---|---|---|---|
| Customer Reviews | — | — | — | — | — |
| Price | — | — | — | — | — |
| Primary Function | ECM motor fault diagnosis & status analysis | Comprehensive ECM motor performance testing | Insulation resistance & compressor safety testing | Semiconductor component testing & parameter analysis | HVAC pressure measurement & airflow verification |
| Core Features | Auto motor fault detection, real-time status feedback, dedicated motor interface | One-click testing, multi-motor compatibility, robust diagnostic algorithms | 1000 Megohms at 500V test range, multi-function multimeter mode, compressor testing | Auto pinout detection, automatic component identification, full parameter measurement | 3% accuracy, liquid-filled design, shock-resistant, 3" w.c. range |
| Operation Mode | Plug-and-play connection, guided diagnostic workflow | Simple hook-up with test leads, one-touch test cycle | Analog-style readout with clear scale markings, manual test mode | Automatic test mode, no manual pin configuration required | Manual installation, direct pressure reading, no power required |




















