3 replies to this topic

[k.boardman]

I am looking at putting in digital room temperature sensors/monitors that record temps to the cloud for monitoring and alarm notifications, note; my room temperatures are my CCP's, we are a fresh meat operation. The sensors I am looking at installing come with a NIST calibration record that is good for a year. Each new calibration will cost $165 per sensor which is a deterrent to weekly or even monthly calibrations, in addition they need to be sent out to a calibration lab. Currently I calibrate digital stick thermometers that are used in the rooms weekly. I have yet to find where a digital stick thermometer is off by more that .7 degrees F. in years of calibrating digital thermometers, either they work or they don't. Is it possible to write a calibration program to calibrate a digital thermometer annually providing it is calibrated to NIST standards at an outside lab and use the NIST calibration documentation as record?

 

Thank you

[MOHAMMED ZAMEERUDDIN]

Yes you can write calibration program in that way.

[k.boardman]

Thank you, however my supporting documentation that I can find only states weekly for thermometer calibration requirements, how do I get around that?

[kingstudruler1]

Thank you, however my supporting documentation that I can find only states weekly for thermometer calibration requirements, how do I get around that?

 

I think that there are two subjects that we are using interchangeably.   Calibration and verification.   

 

You should probably be verifying that even a NIST certified thermometer is accurate with some frequency.   

 

In your case, if a thermometer was found out of calibration after a year in service, you would have a CCP non conformance for the entire year.   

 

 

example:  calibrated annually.  verified as accurate daily, weekly, monthly, etc.