Calibrating device for control stations and indicators

Details Calibrating device for control stations and indicators Calibrating device for control stations and indicators

1978-05-01

1979-08-07

Rolinec, Rudolph V.

Electricity: measuring and testing

Testing and calibrating electric meters

73 1R, 324130, G01R 138, G01R 102, G01R 3500

Patent

active

041639383

ABSTRACT:
A calibrating device is disclosed for insertion between a control station and its indicators, preferably of the bar graph type, with provisions for establishing accurate reference voltages available at marked jacks for use and specifically for checking the calibration of the indicating elements, and to provide for utilization of one or both indicators as a precision voltmeter for checking the potential of various points in the circuitry. Provisions are also made for bypass plugging in so that the indicators operate in a normal manner as if the calibrator were not present. The normal jacks also provide convenient access to the set-point and variable voltage of the station and facilitate the measuring of these voltages by an external digital voltmeter if desired.

REFERENCES:
allen, W.; "High-Accuracy Calibrator. . .", Electronics, Mar. 3 1977, pp. 104-105.

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