MN100003 REV A (12/07/10)
Page 18
Setting the Units on your VibraCheck Limited & VibraCheck II:
The default unit system is set at the factory to be: acceleration= g (rms), velocity = mm/sec (0-peak) and
displacement = um (peak-to-peak) respectively. However, you may select your own unit system by the following
steps.
Acceleration
:
Press acceleration key to select acceleration measurement.
1.
Press and hold the acceleration key for 5 seconds, the units g(rms) and g(0-p), m/s
2.
2
(RMS), m/s
2
(0-P), will appear cyclically. Release the acceleration key when the desired unit appears.
Velocity:
Press velocity key to select velocity measurement.
1.
Press and hold the velocity key for 5 seconds, the units mm/s(0-p) mm/s(rms), in/s(0-p) and
2.
in/s(rms) will appear cyclically. Release the velocity key when the desired unit appears.
Displacement:
Press displacement key to select displacement measurement.
1.
Press and hold the displacement key for 5 seconds, the units um(p-p) and mil(p-p) will appear
2.
cyclically. Release the displacement key when the desired unit appears.
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Once you have set the desired units, the VibraCheck Limited or VibraCheck II will keep these
settings, unless you change them again.
Sensitivity Adjustment:
Each meter is calibrated at the factory prior to shipment, and it is recommended for best results to return the
product to Metrix to perform calibration.
In the event that in-fi eld adjustments are necessary, the following procedure describes sensitivity calibration.
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Sensitivity calibration
Turn the meter on while pressing the acceleration key. Continue to press the key until the data collector beeps 3
(1)
times. At this time, the calibration mode is selected and indicated on the LCD display. Release the acceleration
key.
In the calibration mode, the defi nitions of keypad functions change as follows:
(2)
Displacement key: increase the sensitivity (mV/g)
Velocity key: decrease the sensitivity (mV/g)
Acceleration key: save the setting
Set the sensitivity value according to the attached accelerometer using the keys defi ned in (2). Remember to press
(3)
the Acceleration key to save your fi nal setting.
Turn the data collector off to complete the calibration process.
(4)
