| Electronics > Metrology |
| Calibration |
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| Dane Bear:
How often do good multimeters (such as Fluke 289 or 87 V) need to be sent in for calibration? |
| SeanB:
Depends, how it is used and environment. At least every 6 months for one tossed in a tool bag and dropped on occasion, to every 2 years for a lab unit. |
| Bored@Work:
--- Quote from: SeanB on December 01, 2012, 05:50:15 am ---Depends, how it is used and environment. At least every 6 months for one tossed in a tool bag and dropped on occasion, to every 2 years for a lab unit. --- End quote --- And never for one sitting on a hobbyist's bench when the hobbyist is happy with it as it is. It comes down to how certain you need to be that the meter is still within specs. In a professional environment it might also include liabilities when something went wrong. |
| M. András:
when i bought mine from a fluke distributor the guy told me i should take it to calibration within a 6-8 years from now on but he bets it will be within specs. i could have asked them there to hook it up for calibrator and check it on the spot cos the cal lab was on the other side of the floor |
| EEVblog:
--- Quote from: Bored@Work on December 01, 2012, 07:21:48 am ---It comes down to how certain you need to be that the meter is still within specs. In a professional environment it might also include liabilities when something went wrong. --- End quote --- You can never be "certain" that a meter on it's own is within spec, even if it was calibrated yesterday. The only way to do that is to double check with a second meter, and some companies will actually have procedures that demand this for certain critical measurements. Periodic calibration checking is about building up "confidence" in the meter over time, so you can fairly confident when you use it that it hasn't drifted out of spec since the last calibration. For example, Agilent recently increased their recommended calibration interval on their X series scopes from 1 year too 2 years, because they have done further testing and now have greater confidence in the stability of them. Companies might do the same with their procedures. For example, a new meter might get calibrated every 3 or 6 months at the start to build up confidence in how much it drifts. And then this period might be increased to say 12 months after you gain more confidence. --- Quote ---How often do good multimeters (such as Fluke 289 or 87 V) need to be sent in for calibration? --- End quote --- That entirely depends on what your procedures say! Dave. |
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