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Decent benchtop multimeter for beginner?

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skander36:

--- Quote from: KungFuJosh on August 18, 2024, 02:31:29 pm ---

I attached a photo from the aliexpress listing for the ref I have. The stated values are (surprisingly) not the same as the piece of paper that came with mine. 😉

I have the ref warming up now, I'll turn on the meter soon and do the cold start test.

If I had solar I might leave stuff on, but my electric bills are already way too high as it is.

--- End quote ---

I would recommend you a reference with LM399. there are plenity on Aliexpress at an affordable price.
You can also build one, but from my experience you really need to put quality components to achieve high stability.

KungFuJosh:

--- Quote from: skander36 on August 18, 2024, 05:12:53 pm ---I would recommend you a reference with LM399. there are plenity on Aliexpress at an affordable price.
You can also build one, but from my experience you really need to put quality components to achieve high stability.

--- End quote ---

When I convince myself I need a better ref, and if it's in stock at that exact moment, I'll buy a VREF10-001 r9. It's hard for those two things to line up tho. 😉

skander36:

--- Quote from: KungFuJosh on August 18, 2024, 05:26:30 pm ---

When I convince myself I need a better ref, and if it's in stock at that exact moment, I'll buy a VREF10-001 r9. It's hard for those two things to line up tho. 😉

--- End quote ---

Testing a 6.5 DMM isn't enough reason?

KungFuJosh:

--- Quote from: skander36 on August 18, 2024, 05:52:20 pm ---Testing a 6.5 DMM isn't enough reason?

--- End quote ---

Not for me. The $22 ref I have is fine for my needs. It's stable enough to show that my DMMs are also stable. I rarely need more than mV resolution, so it's sort of silly. Maybe if somebody wants to sell me a used one I'd buy it. 😉

I am about to test my ref from cold start with the DMM warmed up. I might also point a hot air wand at the ref to see how that affects the voltage. I'll post the results in the SDM thread.

EEVblog:

--- Quote from: KungFuJosh on August 18, 2024, 06:28:57 pm ---
--- Quote from: skander36 on August 18, 2024, 05:52:20 pm ---Testing a 6.5 DMM isn't enough reason?

--- End quote ---
Not for me. The $22 ref I have is fine for my needs. It's stable enough to show that my DMMs are also stable. I rarely need more than mV resolution, so it's sort of silly. Maybe if somebody wants to sell me a used one I'd buy it. 😉

--- End quote ---

If "stability" is your main goal then that's what two mulitmeters you can reference against each other gives, you don't need a reference.
i.e. it's unlikley that both meter would drift in the same direction by the same amount
But of course, not having a third meter or reference means if one of the two meters drifts, you don't know which one it is.

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