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Jost Tyre Pressure Indicator


In this short tutorial we’ll explain how to install and calibrate Jost Tyre Pressure Indicators (TPI). These simple TPI units replace the standard valve cap and use a RED LED warning flash when the tyre pressure is below the set PSI.

They can be used in any vehicle from a motorcycle through to a heavy truck and can be calibrated from as low as 3PSI to 300PSI. They come in a handy pack of 4 complete with both a metal and plastic key as well as an Anti-Theft sleeve.

Battery life is said to be 3-years on standby and 30-days with the LED flashing.

How to use the Tyre Pressure Indicator.

Each tyre pressure flasher can be programmed/calibrated to memorise the pressure of your tyres. Once a sensor has been calibrated, if the pressure drops to the pre-calibrated value, the tyre sensor will blink RED to indicate that tyre needs inflating.

Note: if you transfer your Jost TPI sensors and you are running a different tyre pressure, you will need to re-calibrate the sensor to memorise the new tyre pressure value.


Suggestion:
If it is used in light vehicles like motorcycles and cars, you can set it to blink when the tyre pressure drops about 3-4 PSI. For example, if your normal tyre pressure is 30 PSI, you can set the sensor to blink at 26 PSI, and then install it on the valve stem.

If it is used on heavy vehicles like trucks and buses, you can set it to blink if the tyre pressure drops about 8-10 PSI. For example, when the normal pressure is 100 PSI, you can set the sensor to blink at 92 PSI, and then install it onto the valve stem.

How to use it:
Setting the sensors memory.

1 – Using the two keys supplied, remove the LED part and the anti-theft sleeve by placing the Metal Key at the bottom of the device and the Plastic Key over the LED, and rotate anti-clockwise.

2 – Remove the LED, to calibrate and memorise the tyre pressure. To do this insert the Metal Key into the hexagon on top of the sensor. Rotate the hexagon anti-clockwise until it stops rotating. This step releases the old memory.

3 – Inflate the tyre to desired pressure you’d like the RED LED to flash as described in the Suggestions above.

4 – Now screw the sensor onto the valve stem. Insert the Metal Key into the hexagon again and rotate it clockwise until it stops turning. This stores the tyre pressure into the sensor’s memory.

5 – Remove the sensor from the valve stem and assemble all the sensor’s components. Inflate the tyre to correct normal pressure. Install the sensor onto the valve stem with the plastic Key.

The tyre pressure alarm sensor flasher doesn’t blink when the tyre pressure is correct. It will blink RED only if the tyre pressure is lower than the pre-calibrated valve.

To test if the sensor is working, unscrew the senor from the valve stem. As soon as the sensor is removed, the RED LED will begin flashing. If the LED doesn’t flash once the sensor is removed, please check the batteries are inserted correctly or repeat the calibration procedure.

April 26, 2014

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