Troubleshooting Guide
Component Check
6 - 6
SKF Multilog On-Line System IMx-M
User Manual
Checking speed input
1. Determine the rack number and speed input of the channel in question through the
software measurement point setting or through the list of terminal blocks.
2. Measure the signal on the
IMx-M terminal block using an oscilloscope or similar.
Make sure to use an isolated oscilloscope.
3. Is there an expected speed signal on the IMx-M terminal block?
YES: The signal can be too weak or at too high impedance for the IMx-M speed
input to be triggered. Sufficient voltage ripple (peak to peak) is shown in the
electrical specifications. If the signal level is sufficient, then the IMx-M input is
defective or the software is incorrectly configured. Check the settings in the
program for the rack number and input number of the speed measurement
point. Contact SKF Condition Monitoring Center Luleå for consultation.
NO: The cable is damaged, or the sensor is not sending the correct output signal.
Check that the installation of the sensor is correct (is the machine rotating?). If
this produces no result, check the cable. The entire chain from cable to input
can be tested by linking a signal generator with a suitable frequency and
amplitude at the sensor end. However, note that IMx-M normally supplies
power to a sensor (as shown in the equipment list), which is why a coupling
capacitor must then be connected in series, to avoid ruining the signal
generator.
Checking Monitor
1. Check first, whether the @ptitude Observer Monitor PC is functioning as it should
be.
2. Try restarting the computer, if there is any doubt as to the status of the @ptitude
Observer Monitor software.
3. Check also that the Ethernet network is functioning and that the @ptitude Observer
Monitor computer can write to the server disk.
Checking system circuit fault after a configuration download
1. If the rack/slot is armed (disarm released) within approximately 30 seconds after a
configuration download, it could cause a missing/invalid configuration and the
system could indicate a circuit fault.
2. 30 seconds is the approximate time needed to distribute configuration internally.
3. In this case of a circuit fault, the Channel status LEDs located on protection module
are flashing, toggling between green/red/yellow while the STATUS Ready LED is
slow flashing green (indicating a condition of protection module configured &
running).