Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880, Rev 2.1
April 2017
OCX 8800
5-4
Autocalibration using the Field Communicator - Fieldbus
To initiate an automatic calibration using 375 Field Communicator, perform
the following steps. Refer to Section 6, Field Communicator, for the
FOUNDATION Fieldbus menu tree.
1. From Transducer screen select Methods .
2. Select OCX Calibration from the Methods menu.
3. From the OCX Calibration menu, select the type of calibration desired:
Calibrate O2 Sensor ,
Calibrate Combustibles Sensor , or
Calibrate Both Sensors .
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.
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.