Trouble Shooter: Accelerometer Channel Problems Symptoms “Noisy data” message in on-line scan mode. Multiple spikes at line frequency. Spectrum data does not show expected spikes. Breaks in time waveform data. Investigati ve Action Identify problem channel Check bias voltage < 5 volt DC > 15 volt DC 5-15 volt DC Disconnect accelerometer cable at the node box Check open circuit voltage 0 volt 25 volt DC Bad ICP power supply Return node box to MachineXpert for repair Reconnect cable - disconnect accelerometer 25 volt DC 0 volt Bad accelerometer - change Bad cable - change Hardware OK - Check software configuration Change the accelerometer 5-15 volt DC > 15 volt DC Problem solved by changing the accelerometer Bad cable - change the cable & replace the accelerometer Check bias voltage Check open circuit Voltage
