INSTALLATION AND OPERATING INSTRUCTIONS
Troubleshooting
SKF Multilog On-line System IMx-16Plus
User Manual
Revision Letter A
NO: Cable, sensor or installation issue. If practicable replace the sensor by a
signal source to test the measurement chain (excluding sensor/target) and to
verify the cable integrity.
YES: Verify that the signal has an appropriate voltage range and pulse height
to allow the IMx-16Plus to trigger, refer 3.2.4. Check the software is correctly
configured for this digital input. If no root cause is identified, contact TSG for
further advice.
If a speed channel ‘works’ but gives an incorrect speed, check that the correct pulses
(number of pulses per rev) have been configured, in the software.
2.9.4 Relay driver outputs
1. Identify which relay driver output of which IMx-16Plus, is being used for the
alarm under investigation, the expected alarm state and consequently
whether it is expected that the relay coil is being energised or not.
2. Is it expected that the coil be energised?
NO: Skip to step 4.
YES: Measure the DC voltage at the relay coil terminals, using a digital
voltmeter.
a. Is the measured voltage as expected? (approximately 24 V DC)
YES: Skip to step
3.
NO: Disconnect the relay wiring at the IMx-16Plus and recheck the
voltage, across those terminals.
b. Is the measured voltage now as expected? (approximately 24 V DC)
YES: Double check that the relay is compatible with the IMx-16Plus
(especially that the relay current requirement is within its capability).
Otherwise, a relay or cable fault is indicated.
NO: Check again that the correct relay output is being tested and that
the configuration is correct. If so, the test suggests a fault in the IMx
device, contact TSG for further advice.
3. Disconnect the relay output wiring and using a DMM, measure resistance
across the relay output terminals. Observe the reading and disconnect either
of the connections to the relay coil. Has the reading changed (from an open
to a low resistance or vice versa)?
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