• Test voltages of 250 V, 500 V and 1000 V
  • Insulation measurements to 200 MΩ and 5000 MΩ
  • LED indicates constant voltage output and proper crank speed
  • Automatic discharge when measurement is finished
  • Auto-ranging/dual scale operation for better sensitivity and easier readings
  • Extra rugged cast aluminum case; O-ring sealed against rain, water and dust; aluminum lid
  • Designed for harsh environments - marine, mining, heavy-duty field, industrial and military use
  • Compact self-contained package; folded crank
  • Voltage displayed prior to, during and at the end of test
  • Large direct-reading scale
Interested in a FREE demo? Call 1-800-884-4967 or complete this form to submit your request.


The AEMC Model 6503 megohmmeter is a compact, self-contained, hand-cranked true megohmmeter. This practical and dependable instrument is designed for a broad range of plant and field service applications, such as acceptance testing and preventive maintenance of wiring, cables, switchgear and motors.

The easy hand-cranked operation provides a steady, DC voltage output across the entire range for consistently reliable readings. The Model 6503 has three test voltages, 250 V, 500 V and 1000 V, for insulation resistance testing. Test voltages are generated in full across the entire measurement range. A 600 V test voltage range is provided to perform safety checks to confirm that the sample is fully discharged and not connected to an energized circuit.

The AEMC Model 6503 megohmmeter has a unique auto-ranging feature which expands the scale ten times. When the pointer reaches near the end of scale, the auto-ranging feature activates, returning the pointer to the beginning of the scale with the x10 red LED indicator on. Insulation resistance is indicated with a rugged taut-band meter movement on a logarithmic scale. The indicator scale is large and easy-to-read, and has a direct reading on all ranges. A green LED on the front panel illuminates when the proper crank speed is attained, indicating the presence of the selected output.

The AEMC Model 6503 megohmmeter ships complete with:

  • Set of test leads
  • Clips
  • Test probe

AEMC Model 6503 Megohmmeter Specifications

Insulation Tests
Test Voltage 1 to 11 MΩ; 11 to 500 MΩ (250 & 500 V)
10 to 110 MΩ; 110 to 5000 MΩ (1000V)
Short Circuit Current 5mA (max)
Accuracy 2% of Scale Length
Automatic Discharge 8 s/µF
Charging Time 0.5 s/µF
Resistance Tests
Discharging Time 8 s/µF
Voltage Tests/Safety Check
Voltage Range 0 to 600 VAC
Frequency 45 to 450 Hz
Accuracy 3% of Scale
Scale Direct reading on MΩ and voltage scales; 3" (76mm), black on white


This product can be used in the following applications: