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Instruction Manual
IM-106-880C, OI
September 2009
Hazardous Area OCX 8800
5-10
Manual O
2
/COe Calibration using the Field Communicator - Fieldbus
To perform a manual O
2
/COe calibration using the 375 Field Communicator,
use the following procedure. If necessary, refer to Section 6, Field
Communicator, for the Fieldbus 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. To calibrate from Fieldbus, the first step is to set the Transducer Block to
Out of Service Mode (OOS).
2. To set the OOS mode, select Transducer then select Process, followed
by select Out of Service in the Target Mode.
3. From Transducer screen select Methods.
4. Select OCX Calibration from the Methods menu.
5. From the OCX Calibration screen, select Calibrate O2 Sensor for O2
calibration, select Calibrate Combustibles Sensor for COe calibration,
or select Calibrate Both Sensors if calibrate both sensors is desired.
6. In the calibration screen, a Loop should be removed from automatic
control warning appears. Remove the device from any automatic
control loops to avoid a potentially dangerous operating condition and
press OK.
7. The Select Action screen should look like the following. From the
Select Action screen, select Update Display to refresh the calibration
status, select Next Calibration Step to continue calibration, select
Abort Calibration to abort calibration or Exit to exit calibration. Select
one item from the list and press OK. The Select Action screen is static
and data will not be automatically refreshed.
Calibration Step = Idle
Step Time Remaining = 0 seconds
O2 Value = 0.40 %
Combustibles Value = 1000 ppm
1. Update Display
2. Next Calibration Step
3. Abort Calibration
4. Exit
8. The Calibration Screen should look like the following, press OK to
continue. The Calibration Screen should be automatically refreshed,
however it may take a while for the data to refresh.
Calibration Step = Apply O2 Low Gas
Step Time Remaining = 0 seconds
O2 Value = 0.40 %
Combustibles Value = 1000 ppm
Press Next for Selection