- Remove the transmitter from the valve stem.
- Once remove, the monitor should read 0 PSI at the corresponding tire position.
- Use a trusted tire pressure gauge on the same tire and record the tire pressure.
- Screw the transmitter back onto the tire.
- Once back on the tire, the monitor should display the current tire pressure.
- Compare the two tire readings.
Why do you need to perform these steps in order to receive an accurate comparison?
Pressure Changes Over Time
Pressure Variances Between Gauges
- TireMinder brand tire pressure gauges are among the most accurate on the market at ± 1 to 2 PSI.
- The TireMinder transmitter is accurate to ± 3%*.
So, if you are running 100 psi in your tires, you could have a gauge reading 2 psi high and a TPMS transmitter reading 3 psi low leaving a difference of 5 psi. This is not uncommon and is considered totally acceptable. We have had calls from customers doing their initial installation saying all 8 or 10 TireMinder® transmitters are reading 9 to 11 pounds low!!! Can you guess what the problem is?? What is important to understand is that the TireMinder® TMPMS (and any other brand for that matter) is designed to warn you of changes. For example, it really does not care whether it starts at 97 psi or 108 psi. It is the changes and deviations from the baselines you need to know about.
So, please look at “the big picture”. You may use your trusty pressure gauge as the “standard” or you can use the TPMS as the standard. The important point is that they are all relatively consistent.