AEMC Model 6503 Megohmmeter

• 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

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