User Manual

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(Figure 11.10 and Figure 11.11). Once the calibration is complete
(Figure 11.11), the PV range adjustment information will be
displayedatthebottomoftheinterf ace.Youcandecidewhetherto
adjustPVrange.Toreject,pressEscorReject;toadjust,pressEnter
orAdjust.
11.4.4 Special Calibration
Special Calibration is very similar
to the PV Calibration operation. The
differenceis thatSpecial Calibration adjusts theHARTtransmitter’sPV
LRVandURVtogetthecoherencebetweenthestandardsourceranges
andloopcurrent(CA,whiledigitalanalogoutputAOisdescribedinthe
PVCalibrationoperation),sojustrefertothePVCalibrationoperations
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forreference.
11.4.5Output Trim
The Output Trim adjusts the HART transmitter’s digital analog output
according to the actual loop current measured by the calibrator. To
performanOutput Trim,proceedasfollows:
1. In the HART diagnostic and service interface, choose Output Trim
fromlist,thenyoucanpressEnterorSelect
toshowtheOutputtrim
pointselectioninterface.
2. Inthisinterface,youcanselectLow(zeropoint,4mA)outputpointtrimorHigh(spanpoint,20mA)outputpoint
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Figure11.11HARTPVCalibrationresult