I wrote:

Owning standards and instruments with traceable calibrations is necessary but not sufficient for making traceable calibrations with them. For a calibration to be traceable, the lab that did the calibration must be accredited.

David responded:

[Lab] is NIST tracable and acredited. I would not trust them to calibrate a 3.5 digit DVM! There are a number of things I have seen cal certificates from them, which I don't believe they can calibrate.

Good point. I did not mean to suggest that being traceable and accredited necessarily makes a calibration lab good at what it does, or instills upright business ethics.

Best regards,

Charles



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