Calibration; Upper And Lower Trim Methods - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0200-4801, Rev DA
Manual mode
To change only the OUT_VALUE and not the OUT_STATUS of the AI Block:
1. Place the TARGET MODE of the block to MANUAL.
2. Change the OUT_VALUE to the desired value.
Simulate
1. If the SIMULATE switch is in the OFF position, move it to the ON position.
OR
2. If the SIMULATE jumper is already in the ON position, move it to OFF and place it back in the ON
position.
Note
As a safety measure, the switch must be reset every time power is interrupted to the device in order to
enable SIMULATE. This prevents a device that is tested on the bench from getting installed in the process
with SIMULATE still active.
3. To change both the OUT_VALUE and OUT_STATUS of the AI Block, set the TARGET MODE to AUTO.
4. Set SIMULATE_ENABLE_DISABLE to Active.
5. Enter the desired SIMULATE_VALUE to change the OUT_VALUE and SIMULATE_STATUS_QUALITY to
change the OUT_STATUS.
6. If errors occur when performing these steps, be sure the SIMULATE jumper has been reset after
powering up the device.
4.5

Calibration

4.5.1

Upper and lower trim methods

To calibrate the transmitter, run the Upper and Lower 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 CAL_UNIT to supported engineering units in the Transducer Block.
3. Apply physical pressure that corresponds to the lower calibration point and allow the pressure to
stabilize. The pressure must be between the range limits defined in PRIMRY_VALUE_RANGE.
4. Set values of CAL_POINT_LO to correspond to the pressure applied to the sensor.
5. Apply pressure, upper cal point.
6. Set CAL_POINT_HI.
Note
CAL_POINT_HI must be within PRIMARY_VALUE_RANGE and greater than CAL_POINT_LO +
CAL_MIN_SPAN
7. Set SENSOR_CAL_DATE to the current date.
Operation and Maintenance
Operation and Maintenance
October 2016
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