Emerson Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880C, OI
Section 3: Configuration and
Startup
April 2017
Configuring the COe Zero Feature with the
LOI
55
• COe Zero Duration - Length of time COe zero gas flows. Range is 120 to 600
seconds. Default is 120 seconds.
• COe Zero Purge Time - Length of time after COe zero is complete before oxygen/
combustibles readings are considered valid. Range is 60 to 180 seconds. Default
is 60 seconds. Total duration of this function is flow time plus purge time.
• COe Zero Output Track - Determines if the analog output signals track or hold
during the function. Valid choices are None, Both, COe, and O2.
• COe Zero Update - Determines if the COe calibration constant is updated at the
end of the function. Valid choices are Yes and No. A Yes choice will cause the
COe calibration constant to update.
3.9.3 Configuring the COe Zero Feature with the LOI
1. Use the "Z" pattern to enter the LOI menu tree.
2. From the SYSTEM menu, select Input/Output.
3. From the Input/Output menu, select COe Zero. Select the functions as follows:
• COe Zero Enable - Select "Yes" or "No" to enable or disable this feature.
• COe Zero Intrvl - Length of time between COe zero events. Range is 60 to 480
minutes. Default is 60 minutes.
• COe Zero Flow - Length of time COe zero gas flows. Range is 120 to 600 seconds.
Default is 120 seconds.
• COe Zero Purge - Length of time after COe zero is complete before oxygen/
combustibles readings are considered valid. Range is 60 to 180 seconds. Default
is 60 seconds. Total duration of this function is flow time plus purge time.
• COe Zero Tracks - Determines if the analog output signals track or hold during
the function. Valid choices are None, Both, COe, and O2.
• COe Zero Update - Determines if the COe calibration constant is updated at the
end of the function. Valid choices are Yes and No. A Yes choice will cause the COe
calibration constant to update.
3.10 OCX 8800 Reset Procedure
Whenever you correct an equipment alarm or fault condition, the Hazardous Area OCX 8800 will
either revert to normal operation or continue to indicate an alarm status condition. If the
equipment does not revert to normal operation when a fault condition is cleared, or if instructed
to do so in
Section 1 , use the following procedure to reset the Hazardous Area OCX 8800.