Calibrating my Hakko

[smason]

My Hakko 936 was being flakey, so I replaced the element/sensor with one from Ebay. Works great now. I was wondering how to properly calibrate it. I read a thread here that said ballpark it based on the melting point of solder.
Sounds reasonable and probably good enough, but I'm usually not satisfied with "good enough"

I was looking into devices that would measure temps that high, and thought about getting a Fluke probe, but decided against it.

Today whilst rummaging in my desk drawer at work, I spotted the temperature probe that came with my el-cheapo "don't care if it gets borrowed stolen or fried" DMM that I use at work. Interesting, the probe has obvious high-temp insulation over the wire. So I thought, hmmm.. what if?
So I fired up my Weller pyropen iron, and tried it. Went up to 400C without self-destructing, then back to fairly accurate room temp afterwards, so I'll be trying calibration tonight.