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 |
