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BillA · 02-24-2006, 10:18 AM

about only you, pH, and TM could make me respond, most burnt out with the clue level here

neither, a bath or environmental chamber depending on water or air cal
the key is an HP 2804A w/dual sensors, all in cal of course (0.001°C resolution, but sloooow)
I cal in 5°C increments from 15 to 45, 70 if a heat die RTD; then use that curve in a spreadsheet

I'm in Houston so the Inst Shop cal (freezing, midpoint, boiling) is ok, just not sufficient for my desired accuracy
note that the cal cert does specify the barometric pressure, so it can be corrected for
(got to admit I've yet to see anyone actually do so, self included)

02-24-2006, 10:18 AM	#12
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	Re: sensor calibration about only you, pH, and TM could make me respond, most burnt out with the clue level here neither, a bath or environmental chamber depending on water or air cal the key is an HP 2804A w/dual sensors, all in cal of course (0.001°C resolution, but sloooow) I cal in 5°C increments from 15 to 45, 70 if a heat die RTD; then use that curve in a spreadsheet I'm in Houston so the Inst Shop cal (freezing, midpoint, boiling) is ok, just not sufficient for my desired accuracy note that the cal cert does specify the barometric pressure, so it can be corrected for (got to admit I've yet to see anyone actually do so, self included)