Emerson Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880C, OI
Section 5:
Calibration
April 2017
Manual
Calibration
67
5.5 Manual Calibration
If a unit is not equipped with calibration solenoids, a calibration must be performed by an
operator following prompts from the unit. Refer to the following paragraphs for manual
calibration.
5.5.1 Manual Calibration using the optional LOI
Use the following procedure to perform a manual calibration with the LOI. If necessary, refer to
the menu tree in
Section 4, Using the LOI . Once the manual calibration procedure is initiated
at the LOI, a series of prompts will appear giving instructions to the operator.
1. Use the right-pointing key to select the CALIBRATION first column submenu.
2. From the CALIBRATION submenu use the right-pointing key to select the Cal Control
second column submenu.
3. From the Cal Control submenu use the right-pointing key to select the third column
Start Cal O2 option.
4. Remain at the Start Cal O2 option or use the down-pointing key to select the Start Cal
COe option or Start Cal Both option. (The following sequence applies when Start Cal
Both is selected.)
5. Use the right-pointing key to start the calibration. Turn on the low O
2
test gas, when
prompted by the Flow Low Gas message.
6. Press the right-pointing key when the low O
2
test gas is applied. The calibration data
changes as the calibration proceeds.
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.