Calibration Due Date Definition

[Bryan]

Curious about others thoughts, The piece has a cal due date Jun 10.  So can it be used Jun 10 or is Jun 9 the last useful date until it is retested.
Thanks in advance

[OlDave]

That should be covered by your quality manual/policy.

My take? You shouldn't use equipment past its due date and it's not past its due date until June 11.

But realistically, due dates are put there for the convenience of auditors. If you have been performing periodic surveillance of your equipment with formal or even informal spot checks, you know very well if it is functioning within your requirements. Calibration intervals should be assigned by valid statistical methods and the increased risk of using an item a few days past its due date is extremely low if you have done your job and assigned a realistic interval. 

[PMEL Whore]

the increased risk of using an item a few days past its due date is extremely low if you have done your job and assigned a realistic interval.

Except for that whole pesky traceability thing, probably more of a guideline than a rule.

[beadwork]

Another option is to use end of month due dates.....

[Duckbutta]

A Due date of June 10th means the piece may be used on the 10th until 11:59 P.M.

[Bryan]

Thanks for the input, quality manual doesn't define it so that will be added.  I leaned towards Jun 9 as the last day of service in my example and had not considered the Due vs. Overdue logic.  My thought was that it may show up on a calibration certificate listing of standards and could be seen as due cal at the time it was used.  We have procedures in place for extensions & perform analysis based on reliability history but just wondered what the prevailing wisdom was on this.
I'm on board.

[michthai]

I cannot speak for other software programs; but, Fluke Metrack time and date stamps every calibration. The calibration expires at the exact time (hours and minutes) that the calibration was completed.

[ck454ss]

As stated before.  Nothing defines an instruments due date but the owners quality policy on the matter.  Some have End of Month, End of Day or even End of Week due dates.

Only the Owner/Customer defines the due date hence your standard "Any number of factors mays cause equipment to drift Out of Tolerance prior to the due date" statement on everyones certs.

[spanishfly25]

you need to add a statement to your quality manual, making the proper determination, Most cal labs accept the jun 10 until midnight, in our manual we wrote to only use Month and year for due dates, in that case you can use it until June 30,  I was in a place before where they had a grace period (15 days for 12months cal, 10 days for 6 month, 5 days for 3 months and 3 days for monthly cals) good luck