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(Full specifications can be found on datasheet)
Rugged and Portable Analog Megohmmeter
Up to 3% Accuracy
5 Test Voltages from 50, 100, 200, 250, 500 VDC
50 kΩ to 20 TΩ Measurement Range
Maximum of 5 mA Charge Current
Analog Output
Suggested Equipment in Boeing Service Bulletins for DC-10, 747 and others
Self Contained, Portable Carrying Case
Large, Direct Reading Front Panel Meter
Reliable High Quality Instrument Designed to Last up to 30 years
(Full specifications can be found on the datasheet)
Resistance Accuracy: (min reading 0.5) Range 1-5: ± 2(meter reading +1)%
Range 6: ± 2% to accuracy above, Range 7: ± 4% to accuracy above
Voltage Accuracy: (across unknown): +/-2%
Short-Circuit Current: 5mA approximately
Voltage and Resistance Ranges
| Voltage | Rmin (Full Scale) | Rmax | Useful Ranges |
| 50VDC ,100VDC | 50 kΩ | 2 TΩ | 7 |
| 200, 250, & 500 VDC | 500 kΩ | 20 TΩ | 7 |
The GenRad 1863 Megohmmeter is the choice for production and inspection tests on devices with resistances up to 20 Tohms. The GenRad 1863 will measure resistance at any of five test voltages of: 50V, 100V, 200V, 250V, and 500 VDC. Compared to the GenRad 1864, which has adjustable test voltages from 10V to 1090V, this unit has fewer controls, and is the more economical of the two models.
Stability of calibration in the GenRad 1863 Megohmmeter is maintained by use of a four-transistor unity gain amplifier. Stable power supplies and feedback voltmeter circuit minimize drift and time wasting adjustments.
Safety has not been overlooked in the GenRad 1863 Megohmmeter as evidenced by the warning light that is activated by the application of the test voltage. The maximum current possible at the terminals is limited to a 5mA. The Megohmmeter employs a Measure/Charge/Discharge switch for quick charging and discharging of capacitive devices such as long lengths of cable and capacitors.
The GenRad 1863 Megohmmeter is easy to use with direct-reading meter indication and lighted range switch that shows the multiplier for each range and voltage.
Guard and ground terminals permit measurement of grounded or guarded devices. The guard is particularly helpful in measuring three terminal resistors. The ground terminal is used on applications such as insulation resistance of cables in a water bath, where the water needs to be grounded for safety, or other devices where one of the measurement terminals is connected to earth ground.
The 1863 Megohmmeter is supplied in a robust and convenient, portable, Flip-Tilt case that is a stand for the meter in use and protects it in transit and storage.
Some GenRad 1863 Megohmmeter Applications
