Month: December 2022

I have had my used Keithley 2015 THD mul­ti­me­ter for just over six years now, and have final­ly decid­ed to per­form some main­te­nance on it. I pur­chased it as a ful­ly test­ed and work­ing unit back in 2016. After it arrived, I did a visu­al check of inter­nal com­po­nents and a good clean­ing of the exterior.

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