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Instruction Manual
IM-106-880C, OI
September 2009
5-3
Hazardous Area OCX 8800
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.
Autocalibration Setup using the Field Communicator - Fieldbus
NOTE
Automatic calibration is only available on units equipped with calibration
solenoids.
Use the following procedure to specify a time interval (in hours) at which the
Hazardous Area OCX 8800 will automatically calibrate.
1. From the Transducer screen select O2 Cal or COe Cal.
2. From the O2 Cal or COe Cal screen, select O2 Cal Setup or COe
Setup.
3. If the unit is equipped with calibration solenoids and timed automatic
calibration are desired, select Solenoids, then select Yes. Select No to
disable the calibration solenoids.
4. Select O2 Cal Interval and/or COe Cal Interval and enter the desired
time in hours between automatic calibrations. To disable automatic
calibration for O2 and COe, enter 0 for both Cal Interval parameters.
5. If desired, the O2 Next Cal and CO2 Next Cal (next calibration time)
parameters can be changed to synchronize a calibration at a specific
day or time.
OPERATOR - INITIATED
AUTOCALIBRATION
An operator can initiate an automatic calibration at any time provided that the
unit is equipped with calibration solenoids.
Autocalibration using the optional LOI
To initiate a calibration using the LOI, perform the following steps on the LOI
menu tree. Refer to Section 4, Using the LOI, for the LOI menu tree.
1. From the CALIBRATION menu, use the right-pointing arrow to select
the Cal Control menu.
2. Select Start Cal-O2, Start Cal COe, or Start Cal Both to start the
calibration. Select Cal Verify to access the calibration window.
3. At the prompt, use the right-pointing arrow to initiate automatic
calibration.
Autocalibration using the Field Communicator - HART
To initiate an automatic calibration using 375 Field Communicator, perform
the following steps. Refer to Section 6, Field Communicator, for the HART
menu tree.