1644-A: Difference between revisions
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{{Catalog History}} | {{Catalog History}} | ||
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The | The {{Title|General Radio 1644-A Megohm Bridge}} was introduced in {{Catalog S}}. It remained available through {{Catalog 1978}}. It replaced the Type [[544-B]]. | ||
The Type 1644-A is a modified Wheatstone bridge design used for resistance measurements in 9 ranges from 1 kΩ to 1 TΩ. | The Type 1644-A is a modified Wheatstone bridge design used for resistance measurements in 9 ranges from 1 kΩ to 1 TΩ. | ||
Revision as of 02:45, 6 April 2024
The General Radio 1644-A Megohm Bridge was introduced in Catalog S (1965). It remained available through Catalog 1978. It replaced the Type 544-B.
The Type 1644-A is a modified Wheatstone bridge design used for resistance measurements in 9 ranges from 1 kΩ to 1 TΩ. It contains a built-in vacuum tube detector and high voltage power supply. Besides measuring resistors, its uses are measuring semiconductor leakage, capacitor resistance and insulation resistance, for example.
Specifications
- Resistance Range: 1 kΩ to 1000 TΩ in ten decade ranges
- Accuracy: ±1% basic accuracy from 1 kΩ to 10 GΩ (see manual)
- Test Voltages: 10, 20, 50, 100, 200, 500, and 1000 Volts
- Short-Circuit Current: <15 mA at 10 V to 50 V; <10 mA at 100 to 1000 V
Links
Photos
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Detector Board and Foil Side of Power Supply
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Power Supply Board Close-Up
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Detector Board Close-Up
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