Emerson Rosemount OCX8800A Manual page 96

Calibration
December 2022
6.4.1 Calibrate manually using the optional local
operator interface (LOI)
If necessary, refer to
calibration procedure at the LOI, a series of prompts will appear giving
instructions to the operator.
Procedure
1. Press Right to select the CALIBRATION first column submenu.
2. From the CALIBRATION submenu, press Right to select the Cal Control
3. From the Cal Control submenu, press Right to select the third column Start
4. Remain at Start Cal O2 or press Down to select Start Cal COe or Start Cal
5. Press Right to start the calibration. Turn on the low O
6. Press Right after applying the low O
7. Press Right when the low O
8. Press Right after applying the high O
9. Press Right when the high O
10. Press Right to start combustibles calibration. Turn on the CO test gas when
11. Press Right after applying the CO test gas.
12. Press Right when the CO reading is stable.
13. Turn off the CO test gas and press Right to start the CO gas purge.
96
Figure
second column submenu.
Cal O2 option.
Both.
The following sequence applies when you select Start Cal Both.
prompted by the Flow Low Gas message.
The calibration data changes as the calibration proceeds.
and turn on the high O
message.
The calibration data changes as the calibration proceeds.
gas. Press Right to start the high O
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.
prompted.
The calibration data changes as the calibration proceeds.
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.
4-4. Once the the operator initiates the manual
test gas.
2
reading is stable. Turn off the low O
2
test gas as prompted by the Flow High Gas
2
test gas.
2
reading is stable. Turn off the high O
2
gas purge.
2
Manual
00809-0500-4880
test gas, when
2
test gas
2
test
2
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