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Model 763A Gage Pressure Transmitter
Section 2
Regulator
This stage of the circuit regulates the portion of the loop current that is not
Strain Gage Bridge Network
The strain gage bridge network consists of two silicon piezo-resistive strain
sensors, the zero adjusting potentiometer, bridge completion resistors, and the
temperature compensation components.
current. The amount of current is precisely regulated with the feedback net-
work to be proportional to the bridge output.
Temperature Compensation
The 763A is temperature compensated at the factory. Only those repairs
IMPORTANT Combined zero and/or span changes more than ±5% of the factory
calibration can adversely impact transmitter performance. The transmitter
performance may be decreased in direct proportion to the changes to the
factory calibration. If the combined zero and/or span changes represent
a change in the factory calibration by a factor of 2, the transmitter perfor-
mance may be decreased by a factor of 2.
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