Troubleshooting Guide
Component Check
SKF Multilog On
-Line System IMx-S
6 - 5
User Manual
9.
Is the voltage close to the open circuit voltage (+24 V)?
YES: There is a break in the cable or the sensor is damaged. Continue to step
10.
NO: If the voltage appears to be neither within the normal working range, close
to zero nor close to open circuit voltage, then the fault is an unusual one. First,
check that the measurement was correctly carried out, then contact SKF
Condition Monitoring Center Luleå. Remaining faults can be due to a damaged
sensor or a damaged IMx-S input. First, disconnect one pole of the sensor
cable, and measure the open circuit voltage to verify whether the open circuit
voltage is normal. If it is normal, then the fault is probably in the sensor,
otherwise the fault is in IMx-S.
10.
Disconnect the connector from the sensor and short circuit the pins in the
sensor contact, then remeasure the voltage on the IMx-S terminal block. Did
the voltage sink to close to zero (<0.5 V)?
YES: There is an internal break in the sensor, or the contact is oxidized. First,
try cleaning the contact before replacing the sensor.
NO: There is a break in the cable. Repair the cabling.
Checking sensor and sensor cabling for analogue channels from application side
1.
Determine the unit number and channel number of the channel in question
through the measurement point information in the software, or through the list
of terminal blocks.
2.
Measure the DC voltage between the sensor cable poles on the IMx-S terminal
block using a digital voltmeter.
3.
Does the terminal block have the expected voltage level (see sensor sensitivity
and the current actual value of the measured object)?
YES: The sensor and cabling are probably Ok. If the actual value is still not
perceived to be normal, then the fault is probably in the channel settings, or
there is a hardware fault in the IMx-S unit. Continue below.
NO: Continue to step 5.
4.
Check through the current settings for the channel in question in the software.
Determine the amplification, zero level, and the conversion to the user’s unit.
Furthermore, the cable check must be off (N). If this still does not produce the
correct actual value, then the input card is probably damaged. Contact SKF
Condition Monitoring Center Luleå.
