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So this is how it starts...

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tggzzz:

--- Quote from: J-R on January 09, 2024, 09:01:12 pm ---The input impedance of a DMM is similar to an analog meter where it could change depending on the range.  But it seems to me that the DMM still has the advantage where it typically only has two or three values for you to keep track of, while an analog meter will have something different for each range, so typically twice or three times as many.

So it's still a trivial task to set the range on your DMM and use a specific resistor in parallel to reach any desired value.

--- End quote ---

A moving coil meter has a single value for all ranges, most often 50µA full scale.

Calaverasgrande:
There are actually a couple different Keithley's that piqued my interest. Thats why I said 2000 series.
They are all 20XX or 21XX.
There is the model that is specialized for audio measurements like THD. It may be fiddly but it would be better than using my computer to do FFT or buying a more sophisticated oscope that does FFT.
And there is one, 2110 I think, that does capacitance.
I got stuck on Keithley because some audio tech youtuber sang their praises, then I think I watched one of Dave's vids where he went over one.
I'm leaning toward the DE5000 for price, but if I'm honest I hate using handheld meters on my bench.
I'd much rather something I can stack with my PS, function gen, scope etc.

coromonadalix:
take an dedicated  lcr meter  DE-5000 or else,   not from a handheld, nor a bench meter ...

ch_scr:

--- Quote from: Calaverasgrande on January 10, 2024, 06:01:16 pm ---There are actually a couple different Keithley's that piqued my interest. Thats why I said 2000 series.
They are all 20XX or 21XX.
There is the model that is specialized for audio measurements like THD. It may be fiddly but it would be better than using my computer to do FFT or buying a more sophisticated oscope that does FFT.
And there is one, 2110 I think, that does capacitance.
I got stuck on Keithley because some audio tech youtuber sang their praises, then I think I watched one of Dave's vids where he went over one.
I'm leaning toward the DE5000 for price, but if I'm honest I hate using handheld meters on my bench.
I'd much rather something I can stack with my PS, function gen, scope etc.

--- End quote ---
The DE5000 is really a nice LCR meter for the price and being able to measure inductors as well, get's really handy. It can measure capacity/ESR in circuit. Beware with the K21xx meters, these are "rebadgers" of the Picotest M3500A / M3510A. Not bad meters per se, just sold too expensive just because of the logo...

J-R:
Sorry, not trying to make everyone mad about analog.  I understand the meter movement itself is a fixed impedance, but what I mean is the overall unit's input impedance can vary depending on range, AC/DC.  And I am fine with the argument that if a procedure is written for a specific VOM/VTVM/FETVM then by all means go ahead.  And of course personal preference is also always a valid argument in my mind as well.

The Keithley 2015THD is basically just the K2000 with the THD board added.  It's been said by one of the designers that it was made for testing phones, not anything much better, like home audio gear.  And its performance has been shown to be poor compared to other options.

The "Keithley" 2110 is a somewhat interesting option and I've recommended it in the past for certain scenarios.  I think the used prices can be reasonable for what you're getting.  I picked one up a while back but quickly moved on due to the limited display capabilities and clunky user interface.  So it is a tough sell in this context over something like the SDM3045X for regular, daily use where those negatives can become quite annoying.

Despite the DE-5000 being a "handheld", typically this is not a problem since you don't need to use it constantly.

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