To CALIBRATE you must use a reference which is traceable to a national standard.
I suspect what you want to do is check. Warning the following involves water which could be near electricity - take EXTREME CARE!!!!! There is also hot water and electricity - very dangerous if care is not exercised. 1) Get some ice 2) Smash it up 3) Mix in a flask 50% water 50% ice 4) Leave for 10 minutes This is 0=B0C (Zero) 1) Boil a pan of water 2) Keep it boiling for 5 minutes This is 100=B0C (Don't put your sensor in the bottom of the pan, near the top third) The above are quite precise, if your not at some very high elevation. One can compensate for elavation if required.
