DC Differential Voltmeter 871A

• Country
• United States of America (USA)

• Manufacturer / Brand
• Fluke, John, Mfg. Co. Inc.; Everett (WA)

• Year
• 1966 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 187818

• Picture
• Schematics

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Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 115; 230 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: DC Differential Voltmeter 871A - Fluke, John, Mfg. Co. Inc.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 215 x 210 x 340 mm / 8.5 x 8.3 x 13.4 inch

• Notes
• 3 digits + 0-100 potentiometer.
  Ranges: 1, 10, 100, 1000 V.
  Resolutions: 10 µV, 100 µV, 1 mV, 10 mV.
  Input resistance: 10 Mohms.
  When nulled at 1 and 10 V ranges, input resistance is infinite.
  By reading null voltmeter with all switches and pot digits at zero,
  full scale deflection of ±1 mV is obtained.
  Input can be grounded or floating up to 1 kV from ground.
  Voltage Reference: Zener Diode.
  Drift/year ±50 ppm.
  Tempco: <5 ppm/°C.
  Drift per 10% mains voltage change: ±0.001%.
  Drift after one hour warm-up: 0,002%/h.
  
  These specifications are valid for ambient temperature range +10 to +40 °C.
  Power input: 115/230 V ±10%, 50-400 Hz.
  CMRR: 130 dB @ DC, 85 dB @ 60 Hz, 70 dB @ 400 Hz.

• Net weight (2.2 lb = 1 kg)
• 6.5 kg / 14 lb 5.1 oz (14.317 lb)

• Source of data
• - - Data from my own collection

• Mentioned in
• - - Manufacturers Literature

• Author
• Model page created by Christer Falkenström. See "Data change" for further contributors.

• Other Models

• Here you find 90 models, 85 with images and 65 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fluke, John, Mfg. Co. Inc.; Everett (WA)