163
Reference Manual
00809-0100-4021, Rev GC
Section 4: F
OUNDATION
fieldbus Configuration
April 2014
Foundation™ fieldbus configuration
Sensor calibration, lower and upper trim methods
In order to calibrate the transmitter, run the Lower and Upper Trim Methods. If your system does
not support methods, manually configure the Transducer Block parameters listed below.
1.
Set MODE_BLK.TARGET_X to OOS.
2.
Set SENSOR_CAL_METHOD_X to User Trim.
3.
Set CAL_UNIT_X to supported engineering units in the transducer block.
4.
Apply temperature that corresponds to the lower calibration point and allow the
temperature to stabilize. The temperature must be between the range limits defined
in PRIMRY_VALUE_RANGE_X.
5.
Set values of CAL_POINT_LO_X to correspond to the temperature applied by the
sensor.
6.
Apply temperature, temperature corresponding to the upper calibration.
7.
Allow temperature to stabilize.
8.
Set CAL_POINT_HI_X.
Note
CAL_POINT_HI_X must be within PRIMARY_VALUE_RANGE_X and greater than
CAL_POIN CAL_MIN_SPAN_X.
9.
Set SENSOR_CAL_DATE_X to the current date.
10.
Set SENSOR_CAL_WHO_X to the person responsible for the calibration.
11.
Set SENSOR _CAL_LOC_X to the calibration location.
12.
Set MODE_BLK.TARGET_X to AUTO.
Note
If trim fails the transmitter will automatically revert to factory trim.
Excessive correction or sensor failure could cause device status to read “calibration error.” To
clear this, trim the transmitter.
Recall factory trim
To recall a factory trim on the transmitter, run the Recall Factory Trim. If your system does not
support methods, manually configure the transducer block parameters listed below.
1.
Set MODE_BLK.TARGET_X to OOS.
2.
Set SENSOR_CAL_METHOD_X to Factory Trim.
3.
Set SET_FACTORY_TRIM_X to Recall.
4.
Set SENSOR_CAL_DATE_X to the current date.
5.
Set SENSOR_CAL_WHO_X to the person responsible for the calibration.
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