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Old 04-01-2016, 03:24 PM   #101
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I was told by TST the sensor transducer measures air temperature within the transducer itself. Rubber isolation by the valve stem should have no effect.

As for the... "my sensors read a different psi than my gauge"... or... "my sensor reads a different temperature than my handheld laser" remember folks... it is just a baseline to monitor going down the road.

If you want peace of mind so that when you look at the monitor, it indicates exactly what your gauge reads, then you need to adjust your tire pressures accordingly when starting out.

For me, I could care less. As long as the pressures/temperatures stay within the pre-set range I programmed in during set-up, there isn't any reason for concern whether it indicates it started out at 65 psi or 63.4 psi.
I think the difference in temp are the best indication of a problem. The sun side tires will always be little higher than the ones on the shade side and that is not a problem. If your are seeing three tires at 100 degrees and one tire and 140 degrees it hasn't set off any alarms yet but I would be pulling over and checking tires.
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Old 04-01-2016, 03:30 PM   #102
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I think the difference in temp are the best indication of a problem. The sun side tires will always be little higher than the ones on the shade side and that is not a problem. If your are seeing three tires at 100 degrees and one tire and 140 degrees it hasn't set off any alarms yet but I would be pulling over and checking tires.
10-4. I agree wholeheartedly.
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Old 04-01-2016, 05:58 PM   #103
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I think the difference in temp are the best indication of a problem. The sun side tires will always be little higher than the ones on the shade side and that is not a problem. If your are seeing three tires at 100 degrees and one tire and 140 degrees it hasn't set off any alarms yet but I would be pulling over and checking tires.
That's exactly right CW. I was just curious about the temp reading, but really, with the minimum setpoint so high (158 F) it's doubtful that this aspect of the monitor would be of much use. By the time the air temp inside the sensor reaches 158 F, then the tire is probably beginning to unravel. TST should allow the user to reset the temp alarm point at a lower setpoint. Even on a hot day, I have a high quality infrared temp guage as several of you also have, and I have never found my tire rubber temp over 138 F. And that's on a hot, humid day of interstate driving in south Louisiana on our fantastic roads, which must be the best in the nation.....

On the other hand, I have to admit that I don't know what the sensor temp would be on that same hot humid day if the sensor was on the sunny side.
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Old 04-01-2016, 11:35 PM   #104
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That's exactly right CW. I was just curious about the temp reading, but really, with the minimum setpoint so high (158 F) it's doubtful that this aspect of the monitor would be of much use. By the time the air temp inside the sensor reaches 158 F, then the tire is probably beginning to unravel. TST should allow the user to reset the temp alarm point at a lower setpoint. Even on a hot day, I have a high quality infrared temp guage as several of you also have, and I have never found my tire rubber temp over 138 F. And that's on a hot, humid day of interstate driving in south Louisiana on our fantastic roads, which must be the best in the nation.....

On the other hand, I have to admit that I don't know what the sensor temp would be on that same hot humid day if the sensor was on the sunny side.

I will need to go out and recheck the manual (it is in tow vehicle) tomorrow but I'm almost 100% sure 158 degrees is simply the default setting and that it can be changed.
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Old 04-02-2016, 12:25 AM   #105
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I will need to go out and recheck the manual (it is in tow vehicle) tomorrow but I'm almost 100% sure 158 degrees is simply the default setting and that it can be changed.
Yes...that 158 degrees can be reset to another temperature. 158 degrees is the Michelin recommended setting because above that temp tires are entering the danger zone. TST recommends that this setting not be changed. When we first got our 507 system I lowered mine to 135. I raised it back to 158 after driving through the desert. Outside air temp was 117, road temp must have been astronomical and the side of the trailer that had the sun beating on it caused the alarm to go off several times on the Interstate. That overheat alarm is LOUD!
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Old 04-02-2016, 08:41 AM   #106
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Yes...that 158 degrees can be reset to another temperature. 158 degrees is the Michelin recommended setting because above that temp tires are entering the danger zone. TST recommends that this setting not be changed. When we first got our 507 system I lowered mine to 135. I raised it back to 158 after driving through the desert. Outside air temp was 117, road temp must have been astronomical and the side of the trailer that had the sun beating on it caused the alarm to go off several times on the Interstate. That overheat alarm is LOUD!
Well, I hope you are correct, however, when I tried to set it below 158 the reading rolled over to the highest setting of two hundred something, and then started back lower again. In other words, while pressing the - button, the reading would bottom out at 158, then the next number that appeared was over 200, then began scrolling down again. Maybe I've missed something in the setup. I just would like to set it at 145, but for now, everything seems to be working as it should.
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Old 04-02-2016, 09:08 AM   #107
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Well, I hope you are correct, however, when I tried to set it below 158 the reading rolled over to the highest setting of two hundred something, and then started back lower again. In other words, while pressing the - button, the reading would bottom out at 158, then the next number that appeared was over 200, then began scrolling down again. Maybe I've missed something in the setup. I just would like to set it at 145, but for now, everything seems to be working as it should.
When I set mine up it was set for 167 as a default value and mine did the same thing yours is doing when I tried to set it lower.
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Old 04-02-2016, 09:36 AM   #108
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When I set mine up it was set for 167 as a default value and mine did the same thing yours is doing when I tried to set it lower.
Not quite sure what is going on with your monitor or the set up sets, but 158 is the default setting out of the box and TST recommends that setting, they say that at that degree is where most blowouts can occur. If you have your sensors coded already, all you really need to do is call TST and have the monitor in your hand. The Secretary who is very good or ask for Mike and they can tell you how to reset the low end temp. They will walk you through of which buttons have to be pushed to change it. It took me like 5 mins to get things set correct on mine after I had to call them. Also my system is 2 years old, I don't know if they made a change but I really doubt it. Might be worth a call and find out, but it doesn't sound right. It also list the default settings in the manual. At least in mine....Good luck..
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Old 04-02-2016, 09:56 AM   #109
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Pardon a 'dumb' question.........but need a set of these and trying to understand.

So........whatever the setting is..........158, 167, lower, whatever.......is the temperature at which the alarm goes off, correct??? Meaning, that's the upper limit of temp before alarms sound?

Is there a chart or info on various tires, sizes, brands, etc.......at which they recommend that setting to be? I read above Michelin says 158........but that would vary, right??
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Old 04-02-2016, 10:24 AM   #110
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Pardon a 'dumb' question.........but need a set of these and trying to understand.

So........whatever the setting is..........158, 167, lower, whatever.......is the temperature at which the alarm goes off, correct??? Meaning, that's the upper limit of temp before alarms sound?

Is there a chart or info on various tires, sizes, brands, etc.......at which they recommend that setting to be? I read above Michelin says 158........but that would vary, right??
I'm not sure of brands but if the danger point for Michelin is 158 wouldn't you want the alarm go off a few degrees before it reaches that temp. I bet the Michelin tires are rated a lot higher than 158 degrees - just makes sense to me at least.

As far as my default set temp I didn't get any paper work in my box so it could be a returned unit - I got mine from Amazon. On that note did anyone get a warranty card to send in - there wasn't one in my box.
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