TPMS failures

cameronpatentlaw wrote:

Coolerman wrote:
OK, the MANUAL states, "The SENSORS take a reading for temp and pressure every 6 seconds, but only transmit the LATEST reading every 5 minutes." The Web Site FAQ states, " The readings are sent every two minutes, except if a low pressure, fast pressure change or high temp reading occurs, then it transmits the data instantly. So which is it?

The fast leak mode that detects pressure drops of at least 6 PSI lower than the low pressure setting, transmits that data immediately. That would seem to indicate that it would detect a blowout in semi real time.

I searched and found the other 6 page thread on the TST system. That thread is more about the loss of the sensor connection to the monitor and that taking an hour to report to the user. So far no solution to that has been presented. I guess I will hold off and research more before buying.

Keep in mind that these low voltage devices are optimized to save battery life. It takes a lot of juice to transmit, versus just taking the readings and storing the latest readings in memory (in the device). So if everything remains nominal, then the transmitter is not activated (except every 5 minutes). In other words, each reading has a threshold--and each subsequent reading is checked against the threshold (in a loop). If the latest reading is + or - some window tied to the threshold (e.g., the threshold is 50 psi +/- 5 psi), no "emergency" transmission is made. But, if the latest reading is outside the window (e.g., it senses 40 psi), then the transmitter is activated immediately and the reading is sent to the monitor (which triggers the alarm). If it transmitted the reading to the monitor every 6 seconds, you'd be replacing the battery in the TPMS transmitter every 3 days.

Oops, sorry Coolerman--now I see what you are pointing out! There is a discrepancy between the Manual and Website. I guess the most important thing remains that there be an immediate transmission if there is a reading outside the window.