General Radio 1863

The General Radio 1863 Megohmmeter can perform guarded three terminal tests to determine insulation resistance, leakage and voltage coefficient.

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The General Radio 1863 Megohmmeter is the choice for production and inspection tests. The

1863 will measure resistance at any of five common test voltages up to 500VDC, has

fewer controls, and is the lower priced model. It is the best selection for those applications requiring a lesser voltage and resistance range.

The 1864 Megommeter is the choice for more demanding applications. It is the

more flexible of the two instruments. The test voltage can be set to any value from

10VDC to 109VDC in 1-volt steps and to 1090VDC in 10 volt steps. Thus the

1864 can be set to any common, or uncommon test votage for ceramic, mica or

paper capacitors, or other devices. The reverse resistance of rectifiers can be readily

measured; the low test voltages are especially useful in measuring solid state diodes. An

additional range permits measurements up to 200TΩ (2 x 1014Ω)

Both instruments are easy to use with direct-reading meter indication and lighted

range switch that shows the multiplier for each range and voltage. The maximum

current possible at the terminals is limited to a 5mA and a panel light near the terminals warns when voltage is present.

Stable power supplies and feedback voltmeter circuit minimize drift and time wasting adjustments. Guard and ground terminals permit measurement of grounded or

ungroundeded two- or three-terminal resistors. The instruments are supplied in a

convenient, portable, Flip-Tilt case that is a stand for the meter in use and protects

it in transit and storage.