How Do You Calibrate A D. P. Transmitter?

How Do You Calibrate A D. P. Transmitter?
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1 Answer

Answer :

The following steps are to be taken which claribrating :
1. Adjust zero of the Xmtrs.
2. Static preasure test: Give equal pressure on both sides of the transmitter. Zero
should not shift. If it is shifting carry out static alignment.
3. Vaccum test: Apply equal vaccum to both the sides. The zero should not shift.
Calibration Procedure:
 Give 20 psi air supply to the transmitter.
 Vent the L.P. side to atmosphere.
 Connect output of the Instrument to a standard test gauge. Adjust zero.
 Apply required pressure to high pressure side of the transmitter and adjust the span.
 Adjust zero again if necessary.
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