INSTALLATION AND OPERATING INSTRUCTIONS
Troubleshooting
SKF Multilog On-line System IMx-8/IMx-8Plus
User Manual
Revision E
37 (63)
Notes:
1. The Online device configurator (OLDC) and the IMx Manager App can still
access the IMx via serial cable and Bluetooth respectively, regardless of IMx
network settings.
2. During maintenance mode, no measurement data is recorded and the upload
of unsent data stored before entering this mode will resume after restart.
3. If troubleshooting TCP communication note that after the IMx has rebooted
into maintenance mode, it will listen for an incoming connection on port 1000
using the existing IMx network settings but whilst in this mode it will neither
initiate a connection to nor get a connection from, the @ptitude Observer
monitor, server.
If there is no activity for 60 seconds, the IMx will automatically exit maintenance
mode and reboot using the stored measurement configuration.
2.9.3 Sensor circuits
The IMx Manager SAT test functionality can be utilised for basic sensor and cable
troubleshooting, by observing the available measured values and comparing to
expected results for that sensor type and current operating condition. If the machine
is stopped, it may be possible to tap an accelerometer, for example, to test for a
response. If such troubleshooting steps are inadequate, a full measurement or output
circuit, loop test may be required. Note that it may be necessary to temporarily
disable the cable check function for the channel under investigation, to get a
measurement value during tests.
Possible causes for a ‘non
-
responsive’ sensor include:
•
Cable damage, with an open or short circuit in the sensor cable
•
Miswiring
•
Incorrect configuration, for example: analogue sensor power enable
•
Sensor fault
•
Hardware fault in IMx device
•
4-20 mA only: Incorrect fitting of load resistor
•
Tacho only: Speed signal ‘too weak’/impedance too high for
the IMx
In addition to, most of, the above, where the sensor generates a higher than
expected or widely varying signal, consider also the following possible causes:
•
Incorrectly mounted or loose sensor
•
Excitation of sensor mounted resonance
•
Signal disturbance due to external noise, for example RFI
•
A grounding issue