Honeywell STT850 Series - Setting PV URV, and LRV Range Values

Page 54 STT850 Series HART/DE Option User’s Manual Revision 4.0
3. Click Yes to continue. The PV Unit screen will be displayed with a list of measurement units,
as follows:
Deg C
Deg F
Deg R
Kelvin
mV Ohms
4. Select the desired PV Unit, and click OK. A Post Edit action message will be displayed,
indicating if you select this value, the variables that use it as the units code will start in the
previous units until this value is sent to the Transmitter.
5. Click OK to continue or Abort to discard the change.
6. Click Send. The Send to Device screen will be displayed.
7. Select the PV Unit check box.
8. Click Send to download the change to the Transmitter or Return to continue making
changes.
5.2.12 Setting PV URV, and LRV Range Values
STT850 Transmitters are calibrated at the factory with ranges using deg C For a reverse
range, enter the upper range value as the LRV and the lower range value as the URV.
The LRV and URV values can be entered with the Toolkit keypad or by applying the corresponding
temperature values directly to the Transmitter. Use the following procedure to key in the range
values.
1. Starting at the My Device menu, make the following menu selections:
Shortcuts > Device Setup > Basic Setup > Device Information > Range values
2. Click Edit. The “Range value” screen will be displayed.
3. Select PV LRV and click Edit. You will be warned that if you change the value of the
variable it will change the loop current, which may upset the control process.
4. Click Yes to continue.
5. Enter the desired PV LRV value. (for example: 5).
6. Click OK. The Range Values menu will be displayed
7. Choose Temperature URV.
8. Add the desired URV setting value (for example: 45).
9. Press ENTER.
10. Select the PV URV, and click Edit. You will be warned that if you change the value of the
variable, it will change the loop current, which may upset the control process.
11. Click Yes to continue.
12. Click Return to go back to the Basic Setup menu.
13. Click Send. The Send to Device screen will be displayed.
14. Select the Range values check box,
15. Click Send to download the change to Transmitter, or Click Return to continue making
changes.