Thermometer accuracy

[k2dunks]

Mine seems to be very accurate. I do have lots of confidence in it after checking it numerous times with other sources. A couple of weeks ago it was telling me it was -23 here in Wyoming. It must have been accurate because when I got out of the truck I just about froze!!! I wonder how cold the thermometer will go?

[roy365]

Originally Posted by k2dunks

Mine seems to be very accurate. I do have lots of confidence in it after checking it numerous times with other sources. A couple of weeks ago it was telling me it was -23 here in Wyoming. It must have been accurate because when I got out of the truck I just about froze!!! I wonder how cold the thermometer will go?

Ask one of the members from Alaska.....I'm sure they have put theirs to the test.

[anmut]

Originally Posted by Quartz

I hope I don’t come across as a smart *** know-it-all but here goes. In a nut shell wind chill is calculated assuming that cold air (wind) moving past a person or object will cool it faster than still air. However, even though the air is moving, it will not cool a person or object below the ambient air temperature.

For example if the actual temp is 10 degrees and there is a breeze, the breeze will cool you or an object by transporting heat away much more quickly than still air at 10 degrees. In spite of this the air (breeze) that is moving is at 10 degrees and although it will cool a person or object more quickly, it can not cool it below 10 degrees. When they say that it is 10 degrees outside and the wind chill is -15 degrees, what they really mean is that your exposed skin will loose heat in this 10 degree windy weather at the same rate as it would in -15 degree weather when the air is still.

Except when I read that it makes me think that you're trying to disprove what a common room fan does. If the ambient temp is 80f in a room and you turn on a fan, does the temp in the air from the fan not drop to say, 75f? So if you placed a temp gauge in the room and a gauge in the direct path of the fan you're saying that they'd read the same?

I understand that you're trying to say that by only moving air it doesn't change the temp but I would disagree because with moving air you have a change in pressure. A change in pressure will change temps.

How is something so simple making my brain hurt... lol

I think I'm going to have to go back to physics class.

[HudsonValleyTitan]

Originally Posted by roy365

Really? Thats odd. Why wouldnt it read sitting still?

It's actually in the owners manual. I believe the number is 12 MPH. And it's probably for the reason mentioned...it'd pick up heat from the engine/radiator while sitting still because the sensor is behind the grill.

[roy365]

Originally Posted by HudsonValleyTitan

It's actually in the owners manual. I believe the number is 12 MPH. And it's probably for the reason mentioned...it'd pick up heat from the engine/radiator while sitting still because the sensor is behind the grill.

I'm not going to mount mine in the front. For that exact reason.

[Quartz]

Originally Posted by anmut

If the ambient temp is 80f in a room and you turn on a fan, does the temp in the air from the fan not drop to say, 75f? So if you placed a temp gauge in the room and a gauge in the direct path of the fan you're saying that they'd read the same?

A fan doesn't cool air, it only moves it. If you place a thermometer in front of the fan it will not read any different than one that is out of the direct path of the fan.

[cneary812]

Originally Posted by roy365

dont listen to this clown!!!!

it's just witty banter......thats all!!!!

takes one to know one

[Bootzon]

Originally Posted by cneary812

lol that is a good one no I am not a service manager.

as long as this thread has been up I would have thought you would have brought it in by now if it really bothers you that much.

Roy and I bicker back and forth all the time and its all in good fun so if you take me as being offensive then... well... not my intent.

good luck with your thermometer, whichever way it goes.

cneary I didn't take you as offensive, just not entirely helpful,lol
I haven't taken it in because I am about 30 miles from the dealer, so I try to consolidate my trips.

Quartz, not that I question your information, but how the heck did you know about that 15mph relationship with the thermometer??? Honestly is there anything this forum doesn't know. Thanks for the info, very interesting.

[BuckyBadger]

mine is within 2 degrees when I go by the banks

[anmut]

Originally Posted by BuckyBadger

mine is within 2 degrees when I go by the banks

You ready for this windchill coming into WI and the UP?

[vermonster]

I have the same problem with my 06, always reads 5* cold, and yes it is annoying to have something not function as it was designed. Let me know how you make out at the dealer.

[radiokid]

I'm mister temperature. If the readin is consistantly higher than other reported temps and you have been driving at least 10 minutes to equalize any influence of transference from the T/C mounting, its probably shorted somewhere closer to the electronics than it should be. If its a 2 wire T/C it reads the junction at the tip, if the conductors touch before that because of frayed or damaged insulation, it will read something higher as its now inside the hood and subject to whatever temp is present there.

If it reads consistently higher, I would locate the sensore and see if it rattlesd out iof its mount and and is touching metal or something its not supposed to. That would allow conductance directly to the junction of some object other than free flowing outside air, which is what its supposed to be reading. Also if there are any connections between the junction tip (in the grill somewhere) like terminal strips or connectors, they also need to be not touching anything hot or cold or that temp can be averaged into the reading as well.

Thermocouples by themselves are not calibratable. The electronics reading the temp can be though and this would be something for the dealer to sort out as it may involve digging into the processor

[thclimer]

I’m a fanatic about the weather including the temperature; I even have a Peet Brothers Ultimter 2100 weather station with it's temperature sensor located in a tiered passive solar radiation shield that deflects direct and reflected solar radiation. My 06 has consistently read 4-5 degrees lower than about everything I’ve been able to realistically compare it to including my weather station. I’ve had a few occasions when it’s lightly raining and the Titan’s display reads 28 degrees and nothing is freezing to the truck.

I always guessed the Titan’s temperature sensor was located somewhere in or close to the engine air intake. Does anyone know for sure where it is located?

[Quartz]

Originally Posted by Bootzon

Quartz, not that I question your information, but how the heck did you know about that 15mph relationship with the thermometer??? Honestly is there anything this forum doesn't know. Thanks for the info, very interesting.

I wish I could say that I just know that much about my Titan. In all honesty it was because I looked it up in my service manual and it mentioned the 13 mph part.

[Bootzon]

So we have three 06 titans including mine that are +/- 5 degrees too cold. Are we seeing an issue with the 06's??

Anybody else with the thermometer reading too cold?