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ABB STT04 - Page 120

ABB STT04
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PTH PRESSURE TRANSMITTER
CALIBRATION
D - 8
Rezero
The rezero procedure allows you to zero the transmitter without going
through the complete bench calibration procedure.
D-to-A Adjust
The D-TO-A ADJUST selection is only present when you are in the
ANALOG communication mode. There are two methods available to
adjust the four to 20 milliampere output:
Arrow key.
Meter value entry for HART devices.
Key Display Comments
This operation will cause a change in output not cor-
responding to the input. Be sure the control loop is in
manual.
Select YES.
Select REZERO.
If digitally configured, the D-TO-A ADJUST selection
will not appear.
Apply zero value to the transmitter.
Rezero is complete.
CALI-
BRATE
OUTPUT WILL BE
AFFECTED! PROCEED?
NO
YES
ENTER
CALIBRATION:
D-TO-A ADJUST
BENCH CALIB.
REZERO
ENTER
APPLY PRESSURE OF
nn.nn UNITS
THEN HIT ENTER
ENTER
ID TAGNAME
READY

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