howI can the calibration interval for the ameters& voltmeters ( allways used on the production line)

Hispeed,

There are quite a few threads which touch upon this subject in detail, I suggest using the search function and reading through these. This thread is a more in depth mathematical exploration into setting intervals based on instrument performance & trends, so hopefully you aren't reading only this thread and wondering what you got yourself into lol. This level of detail isn't required for common measuring tools on plant floors. :)

Split from the Calibration Intervals (Frequency) derived from Variables Data (http://elsmar.com/Forums/showthread.php?t=20076) thread.

howI can the calibration interval for the ameters& voltmeters ( allways used on the production line)

We calibrate them every six months... ours are used daily on MIG welding machines...

howI can the calibration interval for the ameters& voltmeters ( allways used on the production line)Start with the mfrs recommended calibration frequency. If the history of the as found condition is within spec for a specified number of cal cycles, you can reduce the frequency of calibrations. On the other hand, if the as found condition is out, you should increase the frequency.

In fact, the MSA is a new topic to me ,so I can not understand the meanning of mfrs,as,and cal. So please explain

Mfr was just an abbreviation for manufacturer. If you contact the company who makes the instrument (OEM) they should be able to supply you with a suggested calibration interval.

As supplied simply refers to the readings you obtain when you calibrate an item (prior to making any adjustments).

Cal. is just an abbreviation for calibration.

As you are new to MSA and possibly calibration? You may want to forego anything overly complicated until you can obtain further training. I would try to find out if there are any requirements for your specific industry regardingi these devices...if there are no specific interval requirements I would suggest following the manufacturers recommended calibration interval.

If you get the devices calibrated by an outside calibration laboratory ISO 17025 these folks may be able to suggest a reliable calibration interval which will provide you with acceptable confidence. Don't be afraid to utilize their expertise either, if you have questions about the calibrations, intervals, msa studies, get on the phone with them and see if they can assist you, most would be more than happy to provide you with the information you need.

In fact, the MSA is a new topic to me ,so I can not understand the meanning of mfrs,as,and cal. So please explain

You might want to do some 'homework'. Most terms are defined in The Elsmar Cove Wiki (http://elsmar.com/wiki/) and in the Definitions, Acronyms, Abbreviations and Interpretation (http://elsmar.com/Forums/forumdisplay.php?f=3) forum. Mfrs and Cal are notable exceptions because they are so common.