Emerson Rosemount OCX 8800 - Manual Coe Calibration Using the Field Communicator - HART

10. Select Start/Next Cal Step to start applying the O
2
low gas.
The time to apply the test gas is specified by the Gas Time.
The Calibration Status is automatically changed to FlowO2Low and then
ReadO2Low for a period of time. During this period, if you try to go the next
calibration step by pressing OK and selecting Start/Next Cal Step, you are prompted
with Operator step command is not accepted at this time. The
Next Cal Step command is not accepted at this time.
11. When ready, Calibration Status stops at AppO2Hi. Switch off the O
2
Low Gas and
switch on the O
2
High Gas. Verify that the O
2
concentration measured matches the
O2 HIGH GAS parameter in the Setup window. Press OK when ready.
12. Select Start/Next Cal Step to start applying the O
2
high gas.
The time to apply the test gas is specified by the Gas Time.
The Calibration Status is automatically changed to FlowO2Hi and then ReadO2Hi
for a period of time. During this period, if you try to go the next calibration step by
pressing OK and selecting Start/Next Cal Step, you are prompted with with Operator
step command is not accepted at this time.The Next Cal Step
command is not accepted at this time.
13. When ready, Calibration Status stops at STOP GAS. Switch off the O
2
high gas.
Press OK when ready. Select Start/Next Cal Step to start purging gas.
The time to purge gas is specified by the Purge Time.
When the Purge step is complete, the Calibration Status is at IDLE if the calibration
is successful or CAL RECOMMENDED if the calibration has failed. A Calibration
Failed alarm is set off if the calibration has failed.
14. When calibration is complete, select Exit Cal to exit the calibration method.
5.4.3
Manual COe calibration using the Field Communicator -
HART
To perform a manual COe calibration using the 375 Field Communicator, use the following
procedure.
If necessary, refer to Section 6.3 for the HART menu tree.
Note
To select a menu item, either use the Up and Down keys to scroll to the menu item and press Right or
use the number keypad to select the menu item number.
Procedure
1. Select DIAG/SERVICE from the DEVICE SETUP menu.
2. Select CALIBRATION from the DIAG/SERVICE menu.
Calibration
Reference Manual 73