Rockwell Automation 1440-VAD02-01RA XM-123 Aeroderivative Module - Manual (Page 153)

Publication GMSI10-UM003D-EN-P - May 2010
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Example on Using Table The following example shows you how to use the Full Scale table to determine
the optimal Full Scale value.
To determine the optimal Full Scale value, follow these steps.
1. Refer to Table D.2 XM-123 Measuring Velocity with Accelerometer
(100 mV/g) on page 144.
2. Under the Maximum Vibration Level column, select the row that
corresponds to 10 ips.
3. Under the 10 Hz High Pass Filter (HPF) column, find the
recommended Full Scale Setting. The recommended Full Scale Setting
for the 10 Hz High Pass Filter is 0.17.
4. Refer to the value under the Max High Frequency Peak Amplitude
column to verify that there are not any signals present at the sensor that
exceed this value. For the example above, the Max High Frequency Peak
Amplitude value is 12 g’s.
If there are signals in excess of this level then increase the Full Scale
value to the next higher value, 0.5 in this example. If there are no
Table D.5 XM-123 Measuring Displacement with Displacement Sensor (200 mV/mil)
Max Vibration Level Full Scale Setting
mils pp micrometers pp 1Hz HPF 5Hz HPF 10Hz HPF 40Hz HPF 1000Hz HPF
5 125 1.5
N/A
50 1250 10
EXAMPLE
Application: XM-123 with 100 mV/g accelerometer
Units used for monitoring: velocity, ips
High Pass Filter: 10 Hz
Maximum vibration level: 5 ips pk (360 mm/s RMS)
TIP
Since the maximum vibration level of 5 ips is greater
than 3 ips, it is necessary to refer to the next higher
level in the table, which in this case is 10 ips.