Hi All,
For some kinds of digital thermometer (with probe to measure internal temperature and infrared to measure surface one) we could check if they are accurate (such as checking with melting ice) but we can not calibrate them because there is no adjusting part on them. Could we indirecly calibrate like this way?
For example: if temperature measured by probe is 1.5 oF higher than that of melting ice (32oF). A note "substract 1.5 oF" is attached on the thermometer and close to the probe for easy remembering.
When this thermometr is used to measure a temperature of a product, the valule of the temperautre to be written down on the monitoring form is the displayed value minor 1.5 oF (such as displayed temperature is 34oF, the temperature to be written down on the monitoring form is 32.5 oF).
For the infrared, the same way is used.
I thought of sending back to the manufacturer but they advised me to buy the new one because the calibration cost is higher than that of buying the new one. I have asked some regulatory food inspectors and they do not like this idea.
Please advise if you have any experience on this issue.
Thank you
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