Wireless Sensor Device Manager
Expert Features in Device Manager
SKF Wireless Machine Condition Sensor
41
Service Manual
How to perform envelope calibration:
Enveloped acceleration calibration is not usually necessary. It is automatically calibrated
when the velocity calibration is completed. Enveloped acceleration calibration follows
the same steps as velocity. For accurate calibration of envelope, an amplitude
modulated signal must be applied, for example, 9.82 m/s2 at 2
kHz with 100 Hz @
100% amplitude modulation.
Generic Command Feature
The Generic Command feature allows the expert user to send HART commands directly
to the sensor.
Figure 19
.
Sensor > Generic Command Tab.
Here is an example of sending a HART command to the sensor. Command 125 Write
Battery Voltage Threshold Value sets the threshold value for the “Battery critically low
alarm.” The default value is 3.3 V. The 3.3 V threshold may need to be lowered for
high temperature applications (60 to 85 °C, 140 to 185 °F) by using the generic
command.
Figure 20
.
Generic Command Example.
As shown in the figure above, the setting for critical Power Failure is changed to 2.93 V,
where 403B851E entered in the
Data
field is the IEEE hex format for 2.93 V decimal
number. Press the
Send
button to send the command to the sensor.