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< PART – C Operation and Maintenance >
C-30
IM 39J06B40-01EN 14th Edition: May 30, 2022
C4.5. Fault Isolation and Self Diagnosis
When distributed temperature measurement fails, it may be due to a DTSX3000 fault or
a fault beyond the DTSX3000 so fault isolation to pinpoint the type of fault and its
location is required.
Follow the procedure below to isolate a fault.
1. System Status
Check the system status of the DTSX3000 from a Web browser running on a PC.
SEE ALSO
For details on how to check the system status, see Section B11.1, “Displaying System Status
Information.”
2. Self-diagnosis
Execute self-diagnosis of the DTSX3000 remotely to check for existence of
failures.
SEE ALSO
For details on self-diagnosis execution, see Section B11.2.1, “Self Diagnosis.”
3. Installation Environment
Power supply: Check for any anomaly in the power supplied to the power supply
module of the DTSXL System.
Check that the installation environment conditions (temperature, humidity, vibration,
corrosive gases, ventilation, external noise, etc.) meet the installation specification
of the DTSX3000.
SEE ALSO
For details on the installation specification, see Chapter A2, “Installation Environment.”
4. Sensor Optical Fiber
Check that the sensor optical fiber is connected properly and free of defect.
Perform these checks if distributed temperature measurement fails even if no
DTSX3000 failure is reported by the self-diagnosis function of the DTSX3000. If no
defect is observed by visual inspection, replace with another sensor optical fiber
and check if distributed temperature measurement is successful. The optical fiber
for DTSX (DTFB10) can be used for this purpose to enable convenient fault
isolation. Connect the optical fiber that is provided together with the DTFB10
between the optical connector of the DTSX3000 and the optical output connector of
the DTFB10. It does not matter if connection is made to the IN or OUT optical
connector of the DTFB10. Execute measurement. If distributed temperature
measurement succeeds, it means that the DTSX3000 is normal and the fault lies
with the sensor optical fiber.