VMI VIBER X4, Manual, Page: 9 / 58

Vibration Measurement Instruments
Tools
This menu contains various tools for checking the functionality of the keypad, the
display and Bias measurement.
Keypad
This tool performs a keypad test. Every time you press a key, the key name and
the corresponding key code will be shown. Press ESC to exit the test.
Display
This tool performs a color display test. You can check if the screen colors are as
expected and if any pixels are defective.
Press the F1, F2, F3, AUX and OK keys to change the fill color to red, green, blue,
white or black. Press ESC to exit the test.
Bias
This tool is used to check for transducer or cable faults.
When using the accelerometer, if the value is low and possibly close to zero, it
means that there is a short circuit in the transducer or cable. If the value is high
and close to the value of the power supply, it means that there is a break in the
transducer or cable.
When using displacement transducers, this tool can be used to adjust the proper
position, usually when the bias reaches half of the supply voltage.
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