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Instruction Manual
IM-106-880C, OI
September 2009
5-7
Hazardous Area OCX 8800
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, Field Communicator,
for the HART menu tree.
NOTE
To select a menu item, either use the up and down arrow keys to scroll to the
menu item and press the right arrow key or use the number keypad to select
the menu item number.
To return to a preceding menu, press the left arrow key.
1. Select DIAG/SERVICE from DEVICE SETUP menu.
2. Select CALIBRATION from the DIAG/SERVICE menu.
3. Select CAL CONTROL from the CALIBRATION menu.
4. Select CAL METHODS from the CAL CONTROL menu.
5. From the CAL METHODS menu, select the type of calibration desired:
COe Calibration, or
6. In the first Calibration screen, a loop should be removed from
automatic control warning appears. Remove the Hazardous Area
OCX 8800 from any automatic control loops to avoid a potantially
dangerous operating condition and press OK.
7. 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
8. 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
9. The unit samples O
2
High Gas as the COe Low Gas. The Calinration
Status should 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.
10. 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.