Installation instructions
The Scale app uses data from wireless Bluetooth TPMS sensors to determine the suspension pressure of a semi truck. After configuration you get the total weight of the truck including the load.
1
Installation of sensors
The sensors must be connected to the pressurized air of the suspensions. Use the necessary fittings. Choose easily accessible places to install the sensors, in the open air, as close as possible to the cabin. Example: Near the dials of the trailer, on an air line. The sensors can be installed outdoors but not in a metal box.
2
App Setup
Allow Location permissions and activate Bluetooth. Allow nearby device detection (Android 12+). Tap the image of the truck. Tap the configure icon.
Calibrate ->
Save ->
List of sensors ->
3
Sensor detection
Enter a truck or trailer name.
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To emit the sensors must detect a change in pressure.
Press the arrow indicated by the redsquare.
Detected sensors are automatically listed in the drop-down menu in order of most recent.
Choose sensor.
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Press the floppy disk to save.
To help you identify the right sensor, you can use the sensor list.
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Lower a suspension completely, it will activate that sensor and it will appear at the top of the list.
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4
Calibration
Unloaded weight
Select the truck.
Drive onto a commercial scale so that your steer axle and drive axle only are on the scale.
Record the weight of the truck in the box [kg Empty] and press the button with two arrows to calibrate. Choose Empty.
Make sure the sensor data is recent.
Press the floppy disk to save.
Select the trailer.
Put the trailer axle only on the commercial truck scale.
Note the weight of the trailer in the box [empty kg] and press the button with two arrows to calibrate.
Choose Empty.
Make sure the sensor data is recent.
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Press the floppy disk to save.
Full weight
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Repeat step 4 with a loaded truck, except you have to note the weight in the box [kg Full] and when you press the calibrate button, choose Full.
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5
Other information
There may be a delay between data receptions, when the weight display turns red the data is over 10 seconds old.
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The application may not receive data when the smartphone is turned off.
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The sensor battery can last for 2 years.
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The driver should always watch his load.
