Telemetry problem
 

Hi, i have new revo 3.3 and i'm having a telemetry problem. basically after a while the sensor reads way high. like 100 degrees or more than the motor really is. I've had readings in the 400's. traxxas sent me a new sensor, same thing. it's installed correctly, the wire is routed correctly, i've tried restarting my phone, uninstalling and reinstalling the app, i've updated the app. i have 2 different temperature guns that always both read within 5 degrees of each other and the truck's sensor is way off. also, using a temp gun on these is still accurate even thought it has that glow plug heater wire in there right? Thanks.

Celcius/Farenheid setting?

no but thanks

are you reading F or C.. there be a difference. If 1 follows the metric system then C would be a known reading . if 1 follows US standards. the F would be known. so which is it F or C..? can you answer?

i meant like no that wasn't the issue but thanks. yes in 39 years on earth i never learned the difference between farenheit and Celsius. lol ty anyway.

Here's an easy way to convert. Take Celsius, double it, take off 10% and then add 32. So let's say 100 Celsius, double it and it's 200, take off 10% so subtract 20, gives 180. Now add 32 and you get 212F. Or look at freezing point of water. 0C, double it and you get 0, take off 10% and you still have 0. Add 32 and you get 32F. Now here's a tricky one, negative 40. Double it and you get negative 80, take off 10% (same as multiplying by .9) and you get negative 72. Now add 32 and you get negative 40C. So -40 is the cross over point where Celsius equals Fahrenheit. Fun with numbers.

Does the telemetry have a 100° difference from the temp guns at every engine temp or only after the engine is hot?

Are you checking the engine temps with the temp guns by pointing them at the same spot where the temp sensor is located? A thermistor that is in continual contact with the heat source is much more accurate way of measuring temp than an infrared sensor.

Run the engine up until the telemetry says it's about 220°. Then drop a couple drops of water on the cooling head. If the water boils off you know the engine is actually above 212°.

Lastly, you are dealing with Traxxas, so don't put too much expectations on the accuracy/reliability of anything to do with your truck.

That’s not easy.

waitwhat - it seems more accurate the colder it is. i agree you about the accuracy of thermistors vs infrared but in this case i know it is way off, the engine would've seized at 350 or so. i always thought traxxas's were reliable just not elegant lol. glen i thought it was easy haha.

I don't know what temp range the traxxas thermistor is good for, or what degree of accuracy sensor they specced. If you care that much, you can get an Exergen temp gun. They are quite spendy, but are regarded as the best IR temp gun available.

I've seen a fair number of traxxas parts fail from what I would consider normal use over my 30 years in the hobby. I'd consider traxxas a mid grade basher brand.

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