View Full Version : calibrating a digital thermometer
04-29-2005, 08:20 PM
Can a electrotherm digital 3 probe thermometer be calibrated, and if so where is a good place to have it done? model # SH66a
[Edited by redroc on 04-29-2005 at 08:23 PM]
04-30-2005, 01:13 PM
same with most thermo - with probe in container of water having ice, well stirred = 32F, boiling water = 212F, unless at high altitudes. usually, temps in between will be close. else, check with distrib for where to get calibrated.
04-30-2005, 09:07 PM
Its not off to much but I like for tools like that to be close anyway. I'll see if I can get it adjusted or if I can set it myself. appreciate it
05-01-2005, 12:25 AM
As mentioned an ice slurry is best for your normal calibrations. It should be closer to a slushy than a glass of ice water you might get at a resturant. That will be 32 degrees.
Many thermometers only have one adjustment which is certainly not ideal. You need to calibrate it at 2 known points and verify a third know point to verify it is linear within acceptable ranges.
There is really no need in the residential market for you to have NIST traceable calibrations performed but it may be an option. A guy with a little ambition could set up a calibration center pretty easily and charge a nominal fee for calibration services. It would require at least one very accurate temperature probe and display which you would send off annually for calibration to NIST standards. You would then use that to calibrate any others. There are many tools to do this kind of work on the market but they get pricy quick. There might be some liability if you send yours off to be calibrated and if it were out of spec, it jeopordizes all the calibrations you performed since your last calibration.
05-01-2005, 08:51 AM
I appreciate the advice I'm going to check into it. I'll tell you guys what happens then.REDROC
05-01-2005, 08:57 AM
took mine apart and cal it by the potts in there, have it pro done once a year, always been in a degree or so.
use the slushy tho, its much more accurate
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