Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1983-10-24
1986-02-11
Swisher, S. Clement
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
G01N 2700
Patent
active
045692211
ABSTRACT:
An electro-pneumatic calibrator to be used in testing and calibration of electro-pneumatic devices having the capability of generating or measuring air pressure in psi, current in milliamps or voltage and measuring air pressure in inches of water or resistance in ohms. A plurality of separate digital meters allow simultaneous use of the separate functions. The apparatus includes a switch and two potentiometers which allows setting variable zero points and spans when the apparatus is used to generate a current or voltage and quickly switching between the set zero point and span.
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