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danno
07-02-2004, 11:31 AM
on ebay I picked up a Fluke 2176A digital thermometer (for $15), and it didn't come with a manual (and it's not on Fluke's website). so anyone here have any experience with these things or anything like it? I'd really like to use this unit on my AG stand, since it's a 10 channel unit, it would be easy to switch around from HLT to mash tun, etc. instead of fishing thermometers around...

On the bottom of the machine it has four thermocouple types listed (the common J and K, plus T and E) and each ones temperature range, and this unit has a mark beside the T. Here's my question, does this mean that T type thermocouples are the only ones I can use with this unit? Or are thermocouple types interchangable and I can use the readily available J or K types?

danno
07-02-2004, 12:20 PM
well, I think I answered my own question. on the govt's NIST (National Institute of Standards and Technology) website, I found tables of thermoelectric voltages for each type of thermocouple. All I have to do (I hope) is build a chart with the T temperatures and voltages, and match up the J voltages and temps and convert from one to the other...

(for example, 160ºF is ~ 71ºC, which a type T thermocouple would read as 2.95mV. 2.95mV for a type J thermocouple would produce a reading of 57ºC, or 135ºF... now to build a chart...)