Troubleshooting Guide - SKF Multilog On-line System IMx-T User Manual

Troubleshooting Guide

Troubleshooting Guide is intended as an aid when IMx-T system is not functioning
correctly.
It is designed for instrumentation engineers and others with sufficient knowledge of
electrical troubleshooting in electronic systems with a 110 V/230 V power supply and of
the risks what this can mean in case of incorrect procedure.
SKF Condition Monitoring Center Luleå strives to provide information that is as accurate
as possible. However, SKF Condition Monitoring Center Luleå cannot be held
responsible for any injury or damage to persons or material that can occur in the
interpretation of, or due to actions taken on the basis of information in this document.
Important - The guarantee becomes void if IMx-T units are damaged through incorrect
intervention in the hardware, or a patently incorrect connection in contravention of
directions given.
Problems and Symptoms
Sensor signal disappears or is abnormally changed for single channels
Possible causes:
·
·
·
·
·
Suggested solution:
·
A sensor repeatedly generates a false alarm or varies abnormally
Possible causes:
·
·
·
·
·
Suggested solution:
·
Speed signal unobtainable/faulty for a certain machine
Possible causes:
·
·
·
·
·
Suggested solution:
·
6-32
Broken sensor cable
Short circuit in sensor cable
Sensor fault
Hardware fault with IMx-T input stage
Grounding loop
Carry out sensor/cable test.
Broken sensor cable/contact
Incorrectly mounted sensor
Hardware fault with IMx-T input stage
Signal disturbed by external noise
Grounding loop
First carry out sensor/cable test. In addition, check the sensor mounting. If this
yields no result, contact SKF Condition Monitoring Center Luleå.
Cable fault (short circuit/broken) to speed sensor
Faulty speed sensor, or faulty installation
Speed signal too weak/impedance too high for IMx-T
Faulty IMx-T speed input
Incorrect setting in hardware
Test speed input.
Troubleshooting Guide
SKF Multilog On-line System IMx-T
User Manual, Revision F
6