The calibration verify feature is only valid if the Hazardous Area OCX 8800 is supplied with
calibration solenoids and the solenoids have been activated.
During the Calibration Verify function the analog output signals will track the oxygen and
combustibles readings. To avoid a potentially dangerous operating condition, the
Hazardous Area OCX 8800 must be removed from the automatic combustion control
loop before performing the Calibration Verify procedure.
3.7.1 Performing a Calibration Verify with the Field
Communicator - HART
1. Use the 375 Field Communicator or AMS software to access the HART menu.
2. From the DEVICE SETUP menu, select DIAG/SERVICE.
3. From the DIAG/SERVICE menu, select CALIBRATION.
4. From the CALIBRATION, select CAL VERIFY. Select Verify Calibration. From this menu,
select the functions as follows:
• Flow High O2 Gas - Flows the high O2 test gas for the time specified in the
calibration setup.
• Flow Low O2 Gas - Flows the low O2 test gas for the time specified in the
calibration setup.
• Flow High COe Gas - Flows the COe test gas for the time specified in the
calibration setup.
• Purge Gas - Initiates a delay for the specified purge time before oxygen/
combustibles readings are considered valid.
NOTE:
A Purge will automatically follow a gas flow.
3.7.2 Performing a Calibration Verify with the Field
Communicator - Fieldbus
1. Use the 375 Field Communicator or AMS software to access the Fieldbus menu.
2. From the TRANSDUCER block menu, select METHODS.
3. Set the Mode to OOS (Out of Service) before starting the Calibration Verify process.
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