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Vibration Level
In some environments, high levels of vibration may occur. Before you record
measurements take the time to ensure you have selected the optimum range
for the process being recorded.
The optimum range is generally the lowest range that can be selected that does
not produce an overload condition for the process being monitored.
Where high levels of vibration are encountered the meter may register an
overload and in these circumstances the meter will display that this has
occurred. In such cases you will need to select the high range to accommodate
the higher peak levels and if Overload conditions are still occurring on the high
range it may be necessary to use an impact filter on the accelerometer.
If the vibration levels are too low for the range selected then the meter will
display an under range condition. Under these circumstances you will need to
select the low range if possible.
For more detailed information see
Under Range & Overload Conditions
.
Frequency Weighting Filter
The human body’s discomfort level to vibration alters depending on the vibration
frequency and where the vibration is in contact with the body.
Your Vexo H meter therefore has the following frequency weighting filter which
is applied to the measured vibration signal using a fast processor for superior
accuracy: -
Hand Arm Vibration
Filter
Description
Wh
Always used for Hand Arm Vibration measurement in the X, Y
and Z Axis.
Wh Filter Frequency Response:
-70
-60
-50
-40
-30
-20
-10
0
0.10
1.00
10.00
100.00
1000.00
10000.00
G
ai
n (
dB
)
Frequency (Hz)
