VMI VIBER X4, Manual, Page: 42 / 58

Vibration Measurement Instruments
Audio
Listening to bearing noise is an established, proven method. Sound
analyses of low speed bearings and gears can sometimes be much
faster and even more reliable than BC value. This is also a good
technique for estimating lubrication volume.
NOTE The audio connector must be a 3.5mm stereo plug.
The value of the sound volume is shown at the top as a percentage.
On the lower part of the screen details are shown regarding:
• Transducer used
• Audio input
• Gain
During live listening you can press:
• Gain Using Left and Right arrows change the amplification from
low to high when vibration level is low. To avoid damage to your
hearing, the volume level reduces automatically to 20% when
changing from low to high.
• Audio volume Using Up and Down arrows, increase and decrease
the sound volume between 0 and 100% in ten steps. The level
shows on the screen and on the speaker icon, one bar for up to 30%,
two bars for up to 60% and three bars for up to 100%.
• F1 Mute This sets the sound level at zero and the speaker icon on
the top of the screen turns red. If pressed twice, the volume will be
reset to the previous level and the icon turns orange.
• F2 Audio input Direct or filtered. On filtered mode, a high pass
filter at 500 Hz is used which removes all low frequency noises.
• Set Default F3 Reset settings to default
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