For frequency I use two GPS disciplined oscillators.
I bought have some HP Tek and Fluke equipment when our work lab closed down. It was calibrated in 1990 by NIST traceable labs. I also have modern test equipment.
If a measurement is questionable I compare readings on various pieces of equipment.
Mike N2MS
On 07/26/2025 10:14 AM EDT Tom ai4th via groups.io <alnath14308=gmail.com@groups.io> wrote:How do folks assure the accuracy of their test equipment? DVM, VTVM, oscilloscope could all use a good voltage standard. Signal generator and oscilloscope need frequency standards. More obscure stuff like IC testers, LC meters, etc also need verification or calibration. In my case I have stuff spanning 50 yrs and manufacturers from around the world. How do you decide what you can trust and what needs repair/replacement?
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