I though this information might be of interest here in the Meteorology section. I am planning on doing a video for this for the channel but I will leave the excel sheet here. I am going to add to the log so I can get some drift over time so The center section will fill out once I get a second year History of the unit : It is my personal meter for the lab and it most accurate one that I have at the moment. My plan is to maintain this with keithly as this currently sets "Truth" for my lab. My every day meter is a DMM 6500 and a bank of DM502A's
This is an excel document created from the data Keithly sent me. I had the meter sent through their accredited calibration along with the data for longer term records this is the first data point.
Zen
Thanks for sharing the results! I was "thrilled" to see a real A2LA accredited calibration certificate instead of an "ISO" rubbish
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yaaay
The calibration lab's Voltage Standard was probably a Fluke 8508A 8.5 digit DMM which was used for comparison. The Fluke 5920A calibrator was probably used as a stable voltage supply so the nominal value difference isn't of importance. The important stuff is the actual measured value, its expanded uncertainty and the decision rules for the statement of conformity (e. g. DMM specifications).
They also have a very short recalibration intervals of only 3 months. I guess they need a high confidence in their calibration results because of high throughput. Building up a calibration history will be very expensive if you're aiming for a 12 month calibration interval. You could increase it to 24 months once your Fluke DMM7510 proves its stability over time.
Last but not least: it's called
metrology (not meteorology) although metrologists also like to discuss the current weather situation (our air conditionings are suffering right now due to hot/moist weather)
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