MEASURING PH WITH HIGHLY RESISTANT MEASURING DEVICES

Abstract

PH measuring devices can be divided according to type into two main classes. In the first group, the measuring voltage is fed directly to the indicator dial after amplification. A directly coupled or a modulated amplifier can be used, a combination of both also being possible. The second main group works on the compensation principle. The measuring voltage is placed opposite a variable, calibrated compensation voltage and alternated until the difference voltage is zero. The control of the compensation current can be manual or automatic by means of a servo mechanism, the latter method often being combined with a registering device (compensograph).

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1963
Accession Number
AD0836219

Entities

People

  • Hans J. Wolf

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Alternating Current
  • Amplification
  • Amplifiers
  • Current Amplifiers
  • Direct Current
  • Electrodes
  • Electron Tubes
  • Indicators
  • Materials
  • Measurement
  • Measuring Instruments
  • Modulators
  • Ph Meters
  • Precision
  • Resistance
  • Voltage Amplifiers

Readers

  • Electrical Engineering