SKF Microlog GX Series - Idler Sound Monitor Setup Fields

Idler Sound Monitor Module
How to Set Up a Conveyor Idler Survey
LED Indicators
In Idler Sound Monitor mode:
• The green LED indicates data acquisition is occurring.
• The amber LED indicates data acquisition is initializing.
• The red LED indicates a data collection fault (i.e., ICP error).
Idler Sound Monitor Setup Fields
• Enter appropriate setup information in the following fields:
Units – English or Metric. Determines the system's units of measurement. For
example, select Metric to set belt speed in m/s and idler diameter in mm. Select
English to set belt speed in ft/min and idler diameter in inches.
Sensitivity – Enter the microphone’s sensitivity in mV/Pascal of sound pressure. The
default sensitivity is set to 45 mV/Pascal for the microphone provided by SKF. This
should not need to be changed unless a different microphone is used.
Plant Name - Enter the mine, company or plant name. This information (along with
the following three fields) is stored to memory and saved with the recorded conveyor
sound data for identification purposes.
Location – Enter the conveyor or machine’s location.
Description – If necessary, enter additional description for identification purposes.
Asset Reference – Enter the conveyor asset number, serial number or tag number.
Belt Speed – Enter the conveyor’s belt speed. Belt speed and idler roller diameter are
used to calculate roller rotation speed and bearing fault frequencies.
Idler Diameter – Enter the conveyor’s idler roller diameter. Idler roller diameter and
belt speed are used to calculate roller rotation speed and bearing fault frequencies.
The next four fields allow you to alter alarm thresholds for the Idler Sound Monitor’s
four acoustic measurements. The default alarm threshold settings are set to best
detect idler faults for typical conveyor conditions and should only be altered if they
prove insufficient for your conveyor conditions. Prior to resetting measurement alarm
thresholds, you should read the Resetting Measurement Alarm Thresholds section
later in this manual.
True Pk Threshold – Specify alarm threshold for the Acoustic Enveloping (PaE) true
peak overall measurement.
RSS Threshold – Specify alarm threshold for the Acoustic Enveloping (PaE) Root Sum
Square (RSS) Overall measurement.
Kurtosis Threshold – Specify alarm threshold for the Kurtosis measurement.
HAI Threshold – Specify alarm threshold for the Harmonic Activity Indicator
measurement.
Save To – (Internal or SD Card) specify the medium to record to either the Microlog’s
internal hard drive or an inserted SD card.
SKF Microlog - GX Series 11 - 13
User Manual