Filter
Top Products
Instruction Manual
IM-106-880C, OI
September 2009
5-5
Hazardous Area OCX 8800
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 the Field Communicator - HART
To perform a manual O
2
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:
O2 Calibration
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 potentially dangerous
operating condition and press OK.
7. The Calibration screen should look like the following. Press OK to
continue.
OCX: TAG NAME
STEP: Idle
TIME REMAIN: 0s
O2: 0.4 %
O2 Snsr: 85.95mV
OK/NEXT to Select
ABORT/CANCEL to Exit