Emerson OCX 8800 Instruction Manual page 65

Instruction Manual
IM-106-880, Rev 1.0
January 2007
7. Press the right-pointing key when the low O
the low O test gas and turn on the high O
2
Flow High Gas message.
8. Press the right-pointing key when the high O
calibration data changes as the calibration proceeds.
9. Press the right-pointing key when the high O
the high O test gas. Press the right-pointing key to start the high O
2
purge.
10. When the purge period expires, the LOI display reverts to the normal
operation display. If the calibration failed, the display will indicate an
alarm condition.
11. Press the right-pointing key to start combustibles calibration. Turn on
the CO test gas when prompted.
12. Press the right-pointing key when the CO test gas is applied. The
calibration data changes as the calibration proceeds.
13. Press the right-pointing key when the CO reading is stable.
14. Turn off the CO test gas and press the right-pointing key to start the CO
gas purge.
15. When the purge period expires, the LOI display reverts to the normal
operation display. If the calibration failed, the display will indicate an
alarm condition.
Manual O Calibration using HART
2
To perform a manual O
2
use the following procedure. If necessary, refer to Section 5, 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 O2
CALIBRATION to start O
3. In the first O Calibration screen, a Loop should be removed from
2
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
OK/NEXT to Select
ABORT/CANCEL to Exit
2
calibration using the HART communicator or AMS,
calibration.
2
OCX 8800
reading is stable. Turn off
2
test gas as prompted by the
test gas is applied. The
2
reading is stable. Turn off
2
2
gas
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