Table 21 Setting Lrv And Urv To Applied Pressures - Honeywell ST 3000 User Manual

6— Configuration - Range Values— Setting PV URV and PV LRV
Procedure for setting range values to applied pressure
Table 21 gives the procedure for setting range values to sample applied pressures.
ATTENTION
• When setting the range using applied pressures (procedure in Table 21), the URV changes
automatically to compensate for any changes in the LRV and to maintain the present span
(URV – LRV). When entering the LRV with the keypad (in Table 20), the URV does not
change automatically.
• If you are using the applied pressure method and must change both the LRV and URV,
always change the LRV first.
Step
1 Starting at the "Online" menu, press the right arrow key to step through the following menu
selections:
• Device setup
Diag/Service
•
• Calibration
• Apply values
You will be warned to remove the loop from automatic control. After doing so, press OK to
continue.
2 When the following display appears
choose 4mA, then press ENTER.
A display will prompt you to apply new 4 mA input.
3 Apply known input pressure to transmitter that represents LRV for 4 mA (0%) output. Press
OK.
4 When the "Current applied process value:" display appears, choose "Set as 4mA value" then
press ENTER. This returns you to display shown in Step 2.
5 Repeat Steps 2 through 4 to set the URV to the applied input pressure for 20 mA output.
6 Select Exit and press ENTER.
You will be prompted to return the loop to automatic control. After doing so, press OK.
ATTENTION
You can also use the local zero and span adjustments on the new smart meter to set the lower
and upper range values to applied pressures. See Appendix A for the procedure.
58

Table 21 Setting LRV and URV to Applied Pressures

ST3000: PT 3011
Set the:
1 4mA
2 20mA
3 Exit
ST 3000 HART Transmitter Release 300 User Manual
Action
ABORT ENTER
10/05