Guys
Just because it is digital does not mean it is accurate. Even an expensive one. All thermometers need to be calibrated.

I'm in the food business. For thermometers used in cold apps (ie - incoming raw meat), we use ice water, a certified mercury thermometer, and calibrate all cold thermometers and probes to the indicated certified thermometers reading. We read ice water at 32f on a consistent basis

When calibrating hot thermometers (ie-internal cooked meat temperature), we use boiling water, the certified thermometer, and calibrate all other indicators to the reading. Normally, we read about 210f in boiling water. We are at about 650 feet ASL here. Boiling point will change with barametric.

So, figure out your barametric, adjust your water boiling point to that pressure, then calibrate your thermometer to that temperature. Calibrating your thermometer to ice water for internal heat will not give the same results as calibrating to boiling.

Just being anal.........

__________________
Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport