A.C.-D.C. Millivoltometer TM1

Farnell Instruments Ltd.; Wetherby

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  • Year
  • 1966 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 353605

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

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries / PP11: 2 x (4.5, 4.5) Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: A.C.-D.C. Millivoltometer TM1 - Farnell Instruments Ltd.;
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 218 x 165 x 225 mm / 8.6 x 6.5 x 8.9 inch
  • Notes

  • The TM1 is a fully transistorised millivoltometer having 23 ranges for both AC and DC  covering from 1 mV to 300 V f.s.d. in a 1-3-10 sequence. A Decibel scale is also provided covering -10 to +2 dB
    (0dB = 1 mW in 600 Ω).
    Accuracy:

    • DC: 3% of f.s.d ± 100 µV.
    • AC: 4% of f.s.d. ± 100 µV, from 20 Hz to 100 kHz.

    Input resistance in DC is 1 MΩ/V up to 10V and constant 10 MΩ/V on higher range.
    Input impedance in AC is 100 kΩ from 1 mV to 30 mV, 1 MΩ from 100 mV to 300 mV, and 10 MΩ from 1 V to 300 V

    Two PP11 batteries are used for the equipment with a built-in battery voltage check.

     

  • Net weight (2.2 lb = 1 kg)
  • 6 lb 5 oz (6.313 lb) / 2.866 kg
  • Mentioned in
  • -- Original-techn. papers. (Electronic Engineering, December 1966.)
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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