Products > Test Equipment
AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter
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texaspyro:

--- Quote from: Fungus on September 17, 2017, 11:46:43 pm ---
--- Quote from: texaspyro on September 17, 2017, 10:53:30 pm ---I thought I saw it somewhere in this thread, but can't seem to find it...

--- End quote ---

If you saw anything it would have been for the meter this thread is about.  :-//

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Yes, but this is the only thread that even mentions the Ragu meters...
Mr. Scram:

--- Quote from: texaspyro on September 18, 2017, 12:06:18 am ---Yes, but this is the only thread that even mentions the Ragu meters...

--- End quote ---
Time for a dedicated one, I guess :)
IanB:

--- Quote from: mnementh on September 17, 2017, 10:02:01 pm ---Ummm... okay... so tell me, exactly how are you measuring individual phases with just a meter?

Last I knew, we still needed a 'scope for that. All 3 phases are still present on each leg; you can't ever get away from that. If your meter is made with a simple rectifier and notch filter designed for measuring single-phase AC, it's going to be totally out to lunch measuring 3-phase.
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This is of course not true!

If you measure between two legs of a three phase supply, or between one leg and neutral in a star system, then you will see a single phase AC voltage waveform. If this wasn't true then the whole electrical distribution system in the UK would be impossible, since nearly all homes and business premises in the UK are supplied from three phase distribution transformers, and all homes have a single phase AC supply.

So yes, you can easily get away from three phases in a three phase system. Just measure a single phase.
mnementh:
Mmmokay... I know I've seen it demonstrated otherwise; all 3 phases visible in a single trace at the same time on a single leg. Is this a Delta vs Wye thing, or perhaps a 3-phase transformer thing that I've just mis-remembered?

I know that with a Wye-wound load you have an artificial neutral; perhaps that was related to the transform between Delta wound source and Wye-wound load. Dammit... now you've got me wondering what the hell it was they were showing when I saw that... I remember being amazed when they showed how it was connected.


mnem
I think I'm gonna declare this one a case of temporary stupidity and move on with my life.
tooki:

--- Quote from: eurofox on September 03, 2017, 08:51:13 am ---
--- Quote from: Fungus on September 03, 2017, 07:01:16 am ---
--- Quote from: metrologist on September 02, 2017, 08:13:57 pm ---Forgive my naivety, but what's wrong if it comes from China? Mine took about 2.5 weeks, but no problems so far with the meter. just no box.

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Some people want it NOW, DAMMIT!

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I wait since 5 weeks to get mine from Bangood. |O
I think they use the cheapest way to ship. :horse:

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Just a data point, I ordered one from banggood for $17.77 on Sep 3, it shipped the next day, and was delivered yesterday on the 18th, 2 weeks on the dot.
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