Page 68
STT
850 Series HART/DE Option User’s Manual
Revision 4.0
6.8 Input Calibration Procedure
6.8.1 Correct Input at the Lower Range Value (LRV)
Enter the appropriate values before doing the calibration.
Configure sensor type to mV or TC or RTD or Ohms for the input which we are going to perform
calibration. Below snapshots are examples of sensor type TC-E.
The Lower calibration Point and Upper calibration Point are the values used for the LRV Correct and
URV Correct.
These values are entered in Device Setup/Sensors/Sensor 1/Sensor 1 Config Params and Device
Setup/Sensors/Sensor 2/Sensor 2 Config Params menus.
So the first set is for LRV1 Correct and URV1 Correct and the second set is for LRV2 Correct and
URV2 Correct.
1.
Select the
Correct LRV
button on the CALIBRATION display. (See Step 4 in the previous
procedure to bring the CALIBRATION screen to the display.)
2.
Select the
Correct LRV
button. This message appears:
3.
Adjust the PV input Temperature to the
exact value of the LRV
entered
in the DE
CONFIGURE display.
4.
Select the
OK
button
5.
Observe the input Temperature at the applied value; when it is stable, select the
OK
button.
6.
When the Transmitter has completed the LRV correction, this message appears:
7.
Select
OK
to acknowledge.
