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Precision comparator for measuring in the range 1–10 mV

  • Measurements of Electrical and Magnetic Quantities
  • Published:
Measurement Techniques Aims and scope

Conclusions

Investigations of the cascade comparator have shown that the error in measuring the ratio of the SS emf to the JJ voltage (∼1 mV) does not exceed 4·10−7. For larger JJ voltages the error decreases, and for 8 mV it does not exceed 5·10−8. This error is determined mainly by the response threshold of the NFK-2 nanovoltmeter which serves as a null detector in comparing the measured voltage to voltage drops across the comparator lower arm. When this voltmeter is replaced by more sensitive instruments the above error can be reduced to 10−7 and 2·10−8, respectively.

The comparator can be used for precise measurements in various physical investigations, e.g., in measuring temperature by means of platinum resistance thermometers, etc., when the error must not exceed 10−7.

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Literature cited

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Authors
  1. S. V. Gorbatsevich
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  2. K. A. Krasnov
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  3. V. P. Mazurov
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Additional information

Deceased.

Translated from Izmeritel'naya Tekhnika, No. 5, pp. 53–56, May, 1980.

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Gorbatsevich, S.V., Krasnov, K.A. & Mazurov, V.P. Precision comparator for measuring in the range 1–10 mV. Meas Tech 23, 445–449 (1980). https://doi.org/10.1007/BF00824540

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  • DOI: https://doi.org/10.1007/BF00824540

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