Emerson Rosemount OCX 8800 Reference Manual page 84

Calibration
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Select CAL CONTROL from the CALIBRATION menu.
Select CAL METHODS from the CAL CONTROLPERFORM CAL menu.
From the CAL METHODS menu, select the type of calibration desired: COe Calibration.
In the first Calibration screen, a Loop should be removed from
automatic control warning appears.
Remove the transmitter from any automatic control loops to avoid a potentially
dangerous operating condition and press OK.
The main Calibration screen should look like the following.
OCX: TAG NAME
•
Step: Idle
•
• TIME REMAIN: 0s
• COe: 00.20 ppm, 0.00 mV
• COe DELTA R: 0.00 ohm
• OK/NEXT to Select
ABORT/CANCEL to Exit
•
Press OK to continue.
From the SELECT ACTION screen, select START/STEP CAL to continue calibration,
ABORT CAL to abort calibration, or EXIT CAL to exit calibration. Select one item from
the list and press ENTER.
• OCX: TAG NAME
• SELECT ACTION
a. START/STEP CAL
b. ABORT CAL
c. EXIT CAL
The unit samples O high gas as the COe low gas. The Calibration Status
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automatically changes to ReadCOLow for a period of time. During this period, if you
try to go to the next calibration step by pressing OK and selecting START CAL/STEP
CAL, you are prompted with Operator step command is not accepted
at this time.The Next Cal Step command is not accepted at this time.
When ready, Calibration Status stops at AppCOEHi. Switch on the COe high gas.
Verify that the COe concentration measured matches the COe HIGH GAS parameter
in the Setup window. Press OK when ready.
Select START CAL/STEP CAL to start applying the COe high gas.
The time to apply the test gas is specified by the Gas Time.
OCX 8800