thermocouple soldering to D-type connector
thermocouple soldering to D-type connector
(OP)
Is it possible to solder K-type thermocouples to a D-type connector? Need it for a vacuum chamber feed-through.
How can I do this?
Thanks
How can I do this?
Thanks





RE: thermocouple soldering to D-type connector
RE: thermocouple soldering to D-type connector
This assumes that you can find a suitable location (avoiding extreme temperature) for the transition inside the chamber.
RE: thermocouple soldering to D-type connector
RE: thermocouple soldering to D-type connector
Part of the effect of a thermo-couple is a characteristic potential gradient when the ends of a conductor are at different temperatures.
The use of thermo-couple extension wires alows the accurate determination of the temperature difference between the measured point and the cold junction and compensation circuits.
The voltage gradient is not the same for different materials. The use of copper extension wires will tend to ignore any temperature difference between the ends of the copper extension wires.
Copper extension wires may be used only when the transition to copper is at the same temperature as the measuring circuit
OR
An informed decision has been made to ignore the errors introduced by the use of copper extension wires.
Again, the voltage developed by a thermocouple has two components:
First, the junction voltage.
Second the difference between the voltage gradients of the extension wires.
Back to the original question.
Soldering results in two junctions. wire to solder and solder to wire. These junctions will cancel each other and should not effect the accuracy. The challenge is to find a solder/flux combination that will perform well.
Bill
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"Why not the best?"
Jimmy Carter
RE: thermocouple soldering to D-type connector
RE: thermocouple soldering to D-type connector
http://www.michsci.com/pdf/TC-soldering.pdf
The above link was helpful to me, key is get it clean, clean, clean.
The standard field connection for most of the CAT (and many other manufacturers) these days are Deutsch DT style connectors with gold plated pins.
Hope that helps, Mike L.
RE: thermocouple soldering to D-type connector
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RE: thermocouple soldering to D-type connector