Emerson Rosemount OCX8800 Instruction Manual page 95

Section 5:
Calibration
April 2017
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The main Calibration screen should look like the following. Press OK to continue.
• OCX: TAG NAME
• STEP: Idle
• TIME REMAIN: 0s
• COe: 0.20 ppm
• COe DELTA R: 0.00 ohm
• OK/NEXT to Select
• ABORT/CANCEL to Exit
From the SELECT ACTION screen, select START CAL/STEP CAL to continue calibration,
select 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
– 1. START CAL/STEP CAL
– 2. ABORT CAL
– 3. EXIT CAL
The unit samples O High Gas as the COe Low Gas. The Calibration Status should
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automatically change to ReadCOLow for a period of time. During this period, if an
attempt is made to go to the next calibration step by pressing OK and selecting START
CAL/STEP CAL, you will be prompted with Operator step command is not accepted at
this time.
When ready, Calibration Status will stop at the AppCOeHi. Switch on the COe High Gas.
Verify the COe concentration measured matches the COe HIGH GAS parameter in the
Setup. 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.
The calibration status should automatically change to FlowCOeHI and then
ReadCOeHigh for a period of time. During this period, if an attempt is made to go to the
next calibration step by pressing OK and selecting START CAL/STEP CAL, you will be
prompted with Operator step command is not accepted at this time.
When ready, Calibration Status will stop at STOP GAS, switch off the COe High Gas.
Press OK when ready. Select START CAL/STEP CAL to start purging gas. The time to
purge gas is specified by the Purge time.
When the Purge step is complete, the Calibration Status will be at IDLE. A Calibration
Failed alarm will be set if the calibration has failed.
When calibration is complete. Select Exit Cal to exit the calibration method.
Manual COe Calibration using the Field Communicator -
HART
Instruction Manual
IM-106-880C, OI