Instruction Manual
IM-106-880, Rev 1.0
January 2007
6-5
OCX 8800
7. Press the right-pointing key when the low O
2
reading is stable. Turn off
the low O
2
test gas and turn on the high O
2
test gas as prompted by the
Flow High Gas
message.
8. Press the right-pointing key when the high O
2
test gas is applied. The
calibration data changes as the calibration proceeds.
9. Press the right-pointing key when the high O
2
reading is stable. Turn off
the high O
2
test gas. Press the right-pointing key to start the high O
2
gas
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
2
Calibration using HART
To perform a manual O
2
calibration using the HART communicator or AMS,
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
2
calibration.
3. In the first O
2
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
OK/NEXT to Select
ABORT/CANCEL to Exit
Summary of Contents for OCX 8800
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