Emerson ROSEMOUNT OCX 8800 - Manual (Page 60)

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
5-6
9. The Calibration Status should be automatically changed to FlowCOeHi
and then ReadCOeHi for a period of time. During this period, if an
attempt is made to go the next calibration step by pressing OK and
selecting Start/Next Cal Step, you will be prompted with Operator step
command is not accepted at this time. The Next Cal Step command
is not accepted at this time.
10. When ready, Calibration Status will stop at STOP GAS. Switch off the
COe 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.
11. When the Purge step is complete, the Calibration Status will be at IDLE
if the calibration is successful or CAL RECOMMENDED if the
calibration has failed. A Calibration Failed alarm will be set if the
calibration has failed.
12. When calibration is complete. Select Exit Cal to exit the calibration
method.
Manual O
2
and COe Calibration using HART
To perform a manual O
2
and COe calibration using the HART communicator
or AMS, use the following procedure. If necessary, refer to Section 4, Using
HART Communications, 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. From the DIAG/SERVICE menu, select CALIBRATION. From the
CALIBRATION menu, select PERFORM CAL.
2. From the PERFORM CAL menu, select CAL METHODS. Select 02 &
COe CALIBRATION to start O
2
and COe calibration.
3. In the first Calibration screen, a Loop should be removed from
automatic control warning appears. Remove the OCX 8800 from any
automatic control loops to avoid a potentially dangerous operating
condition and press OK.
4. The main Calibration screen should look like the following. Press OK to
continue.
OCX: TAG NAME
STATUS: Idle
TIME REMAIN: 0s
O2: 0.4 %, 85.95mV
COe: 0.20 ppm, 0.00 mV
OK/NEXT to Select
ABORT/CANCEL to Exit