Author Options:

Need help wiring up this digital thermometer Answered

I bought a thermometer and probe from McMaster-Carr, but didn't expect that it'd come without a power plug nor a clear way to wire it to the probe. Instead, there are a few connections at the back and I need a hand to make sure I don't break anything. Can anyone here help me identify the right way to wire this for 110v wall power? Do I put one end of the power cord into the 0 VAC socket, and the other into the 115 VAC? Also, the probe terminates in eyelets, where this wants a raw wire for the connection. I can snip them--is that right? And why are the probe wires red and yellow (the unit has inputs for TC+ and TC-). I've attached a photo of the rear of the unit. Thanks for your help everyone. EDIT: I did some research and figured out that my hunch was correct. One connection to 0VAC, the other to 115VAC, and the probe leads into the other side. Works great, too.


The forums are retiring in 2021 and are now closed for new topics and comments.

11 years ago

. Hook up AC power on the left side. Neutral to 0VAC.
. The xxx ONLY stuff is contacts for an alarm.
. REC +/- goes to a recorder. Could be 0-10 VDC ( or 0-5, 1-5, 1-10, ...), or 4-20mA DC, or something else.
. Red/Yellow indicates it's a Type K thermocouple. Red = neg, yellow = pos.