Dual thermocouple wiring
Dual thermocouple wiring
(OP)
I was wondering if there is a way to wire two thermocouples so that they send the highest of the two signals to the signal processor. I have a single temp reader but there are two things that I need to measure the temperature that should remain about the same temperature all of the time. I need to know if I can simply wire them in series or paralell in order to get the signal from one of them without halfing or doubling the signal or have any other undesired effects.





RE: Dual thermocouple wiring
amplifier. A thistd amplifier may be connected to output
the highest of the two.
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Dual thermocouple wiring
RE: Dual thermocouple wiring
You can always hook two T/Cs in parallel which will give you the average. Never in series!
Generally instead of the hassle you are heading for, you would just acquire a T/C scanner and see both. Some scanners would probably let you select for "highest".
RE: Dual thermocouple wiring
RE: Dual thermocouple wiring
If they are the same: yes else : no.
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Dual thermocouple wiring
We often hooked up to 12 in parallel for large sterilization chambers. In other cases we would hook up three sets of three.
RE: Dual thermocouple wiring
RE: Dual thermocouple wiring
TTFN
RE: Dual thermocouple wiring
It sounds like you hooked them in SERIES!
RE: Dual thermocouple wiring
RE: Dual thermocouple wiring
RE: Dual thermocouple wiring
Measure each T/C individually with a multimeter on mV DC setting, convert to Temperature using the tables for your type T/C (ie. J, K or whatever). Don't forget to add on ambient temperature of the location where your multimeter is. Calculate the average of the 2 measurements.
Then parallel the T/Cs and do it again. You should get the same result. Otherwise you are doing something wrong.