| Products > Test Equipment |
| Easy way to test the calibration of a DMM (Fluke 45)? |
| << < (11/29) > >> |
| CalibrationGuy:
Yes, what Josh said. |
| shabaz:
No, you're missing the point, when you stated: People measuring the Chinese/Asian boxes do NOT (most likely) have the capabilities that my lab has, so PLEASE take their observations with a grain of salt. Those cheap boxes are actually usable to 3 digits, for an identification of which instrument has the 20 mV discrepancy. It's a very successful way of seeing which instrument has a significant discrepancy. It makes zero sense to expend a lot more on such a check when you'd have to calibrate your device anyway, if you need accuracy. Perhaps the OP has a lab full of instruments or wishes to go into the calibration business and willing to spend $2700 per year. I was simply focussed on addressing the OP's problem. He doesn't need to expend anywhere near that amount to get measurement to the specification of his instrument, once it has been properly calibrated by actually shelling out for it (or a calibrated meter purchased, for a tiny fraction of that cost). Thanks for your perspective, but you missed my point regarding how low-cost it can be for an initial identification of which instrument is wildly out of spec. Only an idiot would assume it was in any way close to an actual calibration. As for Josh, I'm surprised you can't find a way to get a half-price calibration? You seemed pretty proud of the unethical practice of hacking instruments beyond what you'd paid for them, on another thread. |
| CalibrationGuy:
No, I'm not missing the point. Without traceability, those numbers mean NOTHING. I have friends who have boards like these and the numbers were the same for every board. Your usability claims have no credibility because there is no verification of said values. My point is that counting on these values is problematic at best. TomG. |
| shabaz:
Well now you're just trying to swing the discussion into something else. "Without traceability, those numbers mean NOTHING" If you need $2700 of traceability to figure out which instrument is off by 20 mV or so, then there's something wrong with the way you do engineering. |
| KungFuJosh:
--- Quote from: shabaz on April 02, 2024, 09:17:22 pm ---As for Josh, I'm surprised you can't find a way to get a half-price calibration? --- End quote --- I actually do have a half-price calibration waiting for me from the manufacturer of one of my DMMs. 🤣 |
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