Metering and control system

Details Metering and control system Metering and control system

1980-10-02

1983-03-29

Karlsen, Ernest F.

Electricity: measuring and testing

Testing and calibrating electric meters

73 4V, 324115, G01R 138, G01L 2700

Patent

active

043785239

ABSTRACT:
A metering and control system is provided which in one embodiment provides a continuous reading vacuum gage and a controller for activating relays when the vacuum pressures indicated by the gage pass through one or more set points. The controller comprises solid state electrical control circuitry which is separate from the meter, and which may be switched into the meter circuit for calibration purposes. The control circuitry is made up of individual circuits which may be individually adjusted to selected set points, as indicated on the meter. For this purpose, the meter is selectively switched to the various individual circuits. Then, the meter is switched back to indicate the vacuum pressures encountered in the particular system in which it is installed. As the vacuum pressures pass the various set points, the corresponding relays are activated.

REFERENCES:
patent: 4125011 (1978-11-01), Porter

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