I'm using the same TPMS as OP:
The sensors are activated by wheel motion, so the pressures will be updated only after you start riding. When inspecting the bike in the morning, the LCD will show you the last recorded yesterday's pressures.
Still, a very useful farkle, I've since installed it on both my bikes.
yes, you answered it correctly. The bike needs to be moved a bit to get the latest reading. Instead of really riding, I have just pushed few meters and got the reading right!
I've always wondered if those tyre pressure sensor caps stay air tight over time. Because that thing is always letting air pass through the air valve.
The sensor caps just stay tight, no leakage. Just secure it tight, no need to really tighten it hard. I never had any leaks.
I've heard people comment on the mass of the sensor on the rubber valve during high speeds. That said, I've heard of people using them without issue. Not sure on the facts.
I have used sensor this on very hot summer ride - western India summer if you know! On the handlebar console unit, I could easily see the PSI and Temp increasing in both tyres. Since the sensor kept alarming, later I realized and had to increase the "threshold" of the HI value so that it didnt trigger the alarm in these conditions. It was very hot ride, 40-43 Deg Cel, for about 400 KMs, and next day same return journey. Ofcourse I had to take frequent breaks to cool myself - drink water, sprinkle water on jacket & wet the balaclava, have some juice - sugarcane juice is natural energy booster!. The sensors were working just fine.
A year back, a friend of mine borrowed my TPMS kit on his Versys for a trip to Ladakh (Himalayan region in North India). The trip had ups and downs of temperatures, bit rains, very harsh & rugged terrains, lots of off-roads, the unit performed perfectly and helped him to know the tyre health.
So, its working just fine :-)