bobd
New Member
Posts: 1
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Post by bobd on Mar 7, 2022 12:43:45 GMT -5
I am new to the world of cryogenics and have not used silicon diodes before. We are using liquid nitrogen and doing a tank chilldown experiment so the temperature is ambient down to 77 k. If I order DT-670-SD silicon diodes with a "70L" calibration do I need to recalibrate them sometime at some TBD interval? It appears that in the literature the long term stability is plus or minus 40 mK for 200 thermal shocks. So if I am not too concerned with that potential additional uncertainty then I don't need to recalibrate, true?
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Post by Lake Shore Jeff M on Mar 7, 2022 12:58:15 GMT -5
The decision on whether to recalibrate your sensors depends on your internal processes and quality department requirements.
As you state, the diode sensor is very stable over the long term, however, many customers that use our sensors to perform controlled measurements for their customers return them annually where other customers never have them recalibrated.
Our temperature sensors come with a 3-year warranty, therefore, if something in the sensor construction or material fails causing the sensor to shift in calibration, it would be recalibrated or replaced under warranty.
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