I've had my MES 40 for 3 weeks now, and I was preparing to smoke a pork butt tomorrow. I had some time to kill so I wanted to make sure my probes were honest. I have a wired polder probe thermometer, and a Redi Check wireless thermometer. I brought a pan of water up to a rolling boil, and each thermometer went to 214 and stopped there. 212 is boiling, but whatever, they agreed.
I threw a potato in the oven for an hour to soften it up. I took it out and let it cool off for 10 min or so. It was still uncomfortably hot to hold, but I put it in the MES and speared it with the probe from my Redi Check.I set the MES to heat up to 263 and walked away. Not sure if it matters, but the speared potato was on the 2nd rack from the top, on my right side of the MES (If you're standing in front of it, facing it) The probe stuck out of the potato by maybe an inch or two..
After about 40 minutes, the MES beeped and registered 263 on the unit itself. The Redi check probe registered 200, and the MES case probe (Hanging in its holster) registered 222. There are a few variables here. I had the MES plugged into an extension cord (Heavy gauge) which itself was plugged into an adapter. The outlet I have in my yard is a twist-lock outlet, for a pool, so I bought a small conversion cord, I could plug it directly into another outlet on my house, but I'd still be using an extension cord. I'm using the extension because my deck gets windy, and with an extension cord, I can just run it into the shed and keep the wind off. I CAN plug it in directly if extensions are an issue, but then wind is a factor. Any ideas here?