22
Reference Manual
00809-0400-4728, Rev CA
Configuration
September 2018
Configuration
2.5.3
Sensor Transducer block
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
to OOS.
2. Set
SENSOR_CAL_METHOD
to User Trim.
3. Set
CAL_UNIT
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.
5. Set values of CAL_POINT_LO 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
.
Note
CAL_POINT_HI must be within PRIMARY_VALUE_RANGE and greater than CAL_PO
CAL_MIN_SPAN
9. Set
SENSOR_CAL_DATE
to the current date.
10.Set
SENSOR_CAL_WHO
to the person responsible for the calibration.
11.Set
SENSOR _CAL_LOC
to the calibration location.
12.Set
MODE_BLK.TARGET
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
to OOS.
2. Set
SENSOR_CAL_METHOD
to Factory Trim.
3. Set
SET_FACTORY_TRIM
to Recall.
4. Set
SENSOR_CAL_DATE
to the current date.
5. Set
SENSOR_CAL_WHO
to the person responsible for the calibration.
6. Set
SENSOR _CAL_LOC
to the calibration location.
7. Set
MODE_BLK.TARGET
to AUTO.
Summary of Contents for Rosemount 644 FOUNDATION
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