User Guide: RFM5104/14 Predictive Maintenance System User Guide
Page 7
www.RFMicron.com IN012F13
The group identification code must be no more
than four alphanumeric characters. The group
description should be kept brief to fit easily on
the screen. For example, the group could be
given the ID code “EM1” and the description
“Electric Motor 1”. The two sensors could then
be given the location descriptions “Stator core”
and “Bearing.”
3.4. Sensor and Results Files
Human-readable text files are used to store sen
-
sor description information and to log measure-
ment results. A SENSOR FILE contains the details
of each sensor and can be edited or created
using a text editor or spreadsheet application.
In this example, the SENSOR FILE would include:
EM1,Electric Motor1,Stator core,55,90
EM1,Electric Motor1,Bearing,45,50
Although there is only one group in this example,
an arbitrary number of groups can be listed in a
SENSOR FILE, with each group containing one or
more sensors.
The RESULTS FILE can simply be an empty text
file. The software will log the measured results
in the RESULTS FILE, appending to the end of the
file as new results are gathered.
The SENSOR FILE and RESULTS FILE are trans-
ferred to the reader file system and placed in
a known location in the \Flash\ directory of the
reader. The Manage Files screen is used to set
the application to the desired SENSOR FILE and
RESULTS FILE targets.
3.5. Installing and Assigning Sensors
The final step in preparing to use the Predictive
Maintenance System is to install the temperature
sensors and assign the unique EPC code of each
sensor to the predefined location descriptions
contained in the SENSOR FILE. The software
handles the assignment process and updates the
SENSOR FILE.
The user does not need to know the EPC code of
the sensor when it is assigned.
3.6. Measuring Sensor Temperatures
After sensors are installed and assigned, the
reader can be used to retrieve their tempera-
tures. The reader antenna is aimed at each
sensor before initiating a read operation. The
reader and sensor must be within range of each
other. The reader will display the temperature
of the sensor as the read operation is completed.
The reader will also list all of the other sensors
in a group, whether or not they are immediately
visible to the reader. This reminds the user to
help avoid overlooking sensors.
After all the sensors in a group are read, the re-
sults for that group can be saved to the RESULTS
FILE, and then additional sensor groups can be
measured. The RESULTS FILE accumulates mea-
sured results until it is cleared, or until a differ
-
ent file is chosen. Results can also be saved to
the EXPORT FILE in comma-separated value (CSV)
format for viewing in a spreadsheet or importing
into a database system.