ON Semiconductor SPS1M-EVK, User Manual

Page: 6 / 7

SPS1M − EVK
www.onsemi.com
6
Temperature Measurements
Temperature can be read from the Magnus − S3 − based
sensor tag
.
Set the Display value in the Setup screen to
Temperature
.
High Precision and AutoPower mode will be
automatically selected
.
Moisture Measurements
Moisture measurements can be made with the Moisture
Sensor tag
.
Set the Display value in the Setup screen to
Sensor Code. AutoPower mode will be selected by default.
The presence of moisture on the interdigitated capacitor of
the tag will change the Sensor Code reading. Generally,
moisture will cause a reduction in the Sensor Code value.
The surface on which the tag is placed can also affect the
Sensor Code, so the tag should stay in the same place under
both dry and wet conditions. Illustrative results are given in
Figure 12.
Figure 12. Sensor Code changes when a water droplet is placed on the tag
The Moisture Sensor tag can also detect a fine mist
sprayed or wiped on the interdigitated capacitor area
.
Troubleshooting
If the reader cannot read sensor tags, or only reads tags
from a short distance, try the following steps
•
Verify that the maximum reader power is set to 0.
•
Move the tag to a different location or surface
•
Rotate the reader 45 degrees while still pointing the
surface of the antenna at the sensor tag
•
Fully recharge the reader
•
Reset the reader as described in Section 4.1.
Resetting the Reader
The reader can be reset to its factory settings with the
process below . This will not delete the Sensor software from
the flash memory .
1. Exit out of any application that may be running
.
2. Start Nordic ID’s demo program: Start ³
Programs ³ RFID ³ RFID Demo
3. Restore factory defaults: Settings ³ Save ³
Factory default ³ Save Settings
4. Exit the demo program: Main Menu ³ Exit
5. Reset Windows Registry to default: Start ³
Programs ³ Nordic ID ³ Registry Backup ³
Factory Default ³ Defaults ³ Yes
6. Reload Windows CE: Push the power button in the
lower right
-
hand corner of the keypad, select
“Reload Windows CE”, then click “Reload” in the
lower left
-
hand corner of the screen. Follow the
instructions to re
-
calibrate the stylus input
.
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Magnus is a registered trademark of RFMicron.