D.C Electrometer Voltmeter

Baldwin Instrument Co. Ltd.; Dartford

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  • Year
  • 1954 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 353641

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 50 Hz, 200-250 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: D.C Electrometer Voltmeter - Baldwin Instrument Co. Ltd.;
  • Shape
  • Tablemodel, slant panel.
  • Notes

  • This instrument is based on the Farmer cathode follower circuit.
    A positive ionising current of less than 10-10 amps is injected into the circuit under the test for all ranges.

    • Ranges: 0 - 10, 20, 50, 100, 200, 500 DC Volts.
    • Zero Drift: Less than 1% of full-scale deflection per hour after 5 minutes warming on 10 volts range or less on higher ranges.
    • Mains: ± 10% deviation from nominal mains.
    • Stabilization: Voltage will affect the zero and calibration by less than 0.2 V on all ranges.
  • Mentioned in
  • -- Original prospect or advert (Electronic Engineering Feb 1954, Page 68..)
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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