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FREQUENCY COUNTER


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Manufacturer: Hewlett-Packard
Model: Model 5381 A
Cost: $595 (1982)


Description


An instrument for measuring the frequency of any periodic voltage.



Specifications
Range 10Hz to 80 MHz
Sensitivity 50 mV rms
Accuracy ±1 count ±10 parts per million
Max Input 200 Volts (DC and peak AC) for frequencies less than 100 kHz



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Operating Instructions


  1. Connect signal to be measured to INPUT.
  2. Set Attenuator to X 100.
  3. Turn counter on.
  4. Set the GATE TIME as appropriate. This sets both the measurement time (.1 sec, 1 sec and 10 sec) and the resolution (10 Hz and 0.1 Hz respectively). The GATE TIME switch also controls the units of the display, as indicated on the faceplate.
  5. If the display is unstable, reduce the ATTENUATOR as necessary.



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keywords: electrical measurement device, frequency measurement device.

Document created Circa 1992. Original author: Unknown.
Last updated 06/21/96. Revised by David Harrison.