Portable 10A Low Resistance Tester for Electrical & Industrial Maintenance.

Measuring low resistance requires reliable test currents and clean connections. The AEMC Instruments 6240 Micro-Ohmmeter is a rugged, portable 10A tester built to measure contact resistance, motor windings, transformer coils, and ground bonds without complicated setups.

It uses a 4-wire Kelvin measurement method to eliminate lead resistance errors, delivering accurate readings down to 5 micro-ohms. With auto-start testing, built-in memory, and clear connection warnings, the 6240 speeds up routine maintenance and compliance testing in both field and factory environments.

Key Features

• 4-Wire Kelvin Measurement

  Eliminates test lead resistance so you get true, precise readings on low-resistance targets.

• 10A Test Current

  Delivers stable current up to 10A for testing heavy-duty switch contacts, busbars, and motor windings.

• Auto-Start Testing

  Automatically starts measuring as soon as proper contact is made, making repetitive production or field testing much faster.

• Connection & Lead Diagnostics

  Warns you immediately if test leads are loose, improperly connected, or affected by noise, preventing false data collection.

• Smart Power & Battery Management

  Internal rechargeable NiMH battery provides hundreds of tests per charge, with clear battery level indicators to prevent mid-test shutdowns.

• Data Storage & USB Export

  Stores up to 99 test results in internal memory for easy export and report generation via DataView software.

Technical Specifications

What’s in the Box

1. AEMC 6240 Micro-Ohmmeter Unit

2. Set of 10A Kelvin Clip Leads (10 ft)

3. Rechargeable NiMH Battery Pack & Power Cord

4. USB Cable & DataView Software

5. Soft Carrying Bag / Protective Case

6. User Manual

Get Pricing