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Proskit element Thermocouple Idendification?

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Sajjadkhan

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My question is simple, how to identify a thermocouple type, i would not go on color coding because i always see on internet that a K type thermocouple is red and yellow, but every K type thermocouple i bought is black and red, even those came with UNI-T multimeter.
I have bought a Proskit heating element

**broken link removed**

i want to know if its a K type so i can hook it up with AD595, thanks.
 

If you encounter a thermocouple that does not comply to the ANSI standard. You should contact the vendor for more detailed information about its operation, scaling, and connectivity. Standards may also vary by country.


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If still in doubt, simply hook it up supposing its K type and see the results.
 
This is a custom made product, it doesn't need to respect industry standards for color codes. Although type K is good guess, you need to identify the TC type by measurement or refer to reliable information in product documents.
 

Well i have contacted to the manufacturers but no response yet, my room temperature now is 17-18 degree c on a multimeter using a K type thermocouple, when i insert this element thermocouple then it shows the exact temperature range. considering 0volts on 0 degree and thermocouple sensitivity i.e. uV/degreeC then if it would have been J type then it would have been way above, T type is not possible since it measures only up to 350 C. so i also think its a k type for sure.
 

ok about the element thermocouple, proskit has responded and its an E type. i also have experimented with my multimeter which uses k type, i powered up this 24v element with a 15v transformer so thats it stays at low temperature, when the temperature was stable at 352 degree c with a k type thermocouple, i pluged out the k type and inserted the leads of element thermocouple and the result was 432 degree C. the only curves steeper than k type are J and E types. so i guess they are being honest. and it make sense because using steeper curves wont require op-amps with very small offset voltage, hence reducing their cost.

well as far as my concern my Ad595 is a waste then. now i can only use it with E type, measure the ad595 voltage at every 5 degree step and make a look up table in the pic controller, the values between the 5 degree jump would be linear and it wont make that big error i suppose, i hope i can use this ic as an op-amp, catch me if i am wrong.
 

The AD595 datasheet describes recalibration for type E thermocouple. For high precision, it must be done individually, because it depends on unspecified internal resistor values. A recalibration is necessary however to make the reference compensation work with type E, a software correction can't achieve it.

I guess, for the accuracy requirement of a solder tool, the typical recalibration given in the datasheet can be sufficient.
 

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