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Manual
00809-0500-4881
9.2
Diagnostic alarms
CAUTION
Electronics failure
Failure to install a blocking diode may create noise spikes and cause faults in the
electronics.
Always install a blocking diode on the customer's relay coil.
The transmitter is equipped with a set of alarm relay contacts on the microprocessor
board in the electronics housing. You can connect this set of dry contacts to any customer
supplied relay device, 30 Vdc, 30 mA maximum. A blocking diode is required on the
customer's relay coil.
Any fault condition in the transmitter will trip the alarm relay. The optional SPA with HART
programmable alarm indicates LOW O2, HIGH COe, Calibration Status, and Unit Failure.
For more information, refer to
9.3
Fault isolation
Faults in the transmitter are indicated by messages displayed on the Field Communicator
or local operator interface (LOI).
If a fault is indicated on the Field Communicator or LOI, locate the fault indication
in the following sections. For each fault listed, there are related potential causes and
recommended actions. The potential causes are listed in order of most probable to least
probable. Starting with the most probable cause, inspect and test the transmitter to
isolate the actual cause; then use the recommended corrective action listed to correct the
problem.
Rosemount OCX8800C
SPA with HART
alarm.
®
Troubleshoot
April 2023
®
183
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