I got this Multimeter (Extech EX530) when I measured the temperature with the thermocouple that it came with I got 72 degrease inside the house which is the right answer. But when I take it outside (20 degrease) it goes down to 25 then goes up to about 55 and stays there for 5 minutes at which time I came back in side. I can test it for longer if it helps.
Thank you for your time.
Thank you for your time.