Products > Test Equipment
Decent benchtop multimeter for beginner?
MiroS:
--- Quote from: Aldo22 on August 19, 2024, 02:40:15 pm ---
--- Quote from: tszaboo on August 19, 2024, 12:41:09 pm ---Even a 34401A is going to measure 300KHz with 4% accuracy. 100KHz is 0.5% or 0.04dB.
--- End quote ---
I don't know what you're trying to say.
I'm talking about a rotten 50 year old analog meter sitting in the basement and you're talking about a $1000 top of the line DMM.
What's the connection?
--- End quote ---
I think 'old bad 'vs 'old good'.
'Old good' can be not that wrong way, actualy often best way to go. With some patient they can be really cheap.
I have a few old lab multimeters lacking plenty of fetures, but most of them are substituded by Python GUI & scritps woking over old good GPIB. That way you can design your own irtual multimeter.
Aldo22:
--- Quote from: MiroS on August 19, 2024, 03:19:13 pm ---I think 'old bad 'vs 'old good'.
--- End quote ---
I don't know what you mean by "good" and "bad", but I would describe a measuring device that cost maybe CHF 35.- some 46 years ago and still measures the same today as it did on the first day as a "good" device. But of course it is now outdated.
P.S. I understand that you (still) hate the USSR (as a Polish citizen I probably would too), but this has nothing to do with it.
Kleinstein:
I also have exactly that type of russian meter. Not bad for an analog meter and reasonabe priced at the time. I nice point was that it came with schematics and even spare diodes and taut band. I remember a nasty issue when measuring higher frequency AC - at some resonant frequency I get essentially the same deflection (~ 75% at my test) in all ranges including the 900 V range. Maybe it was just may unit or exactly a resonance or had some common mode effect.
The meter has the usual "simple" passive rectifier circuit (the version with 2 diodes and 2 resistors instead of the normal 4 diode bridge). This can work well for high frequencies, but is of cause not true RMS and gives a nonlinear scale. Higher frequency true RMS can be a bit tricky and the better converter chips get quite expensive.
Gyro:
My second ever multimeter too. The internal construction is a thing of beauty - once you get past the stamped pitch seal on one of the screws! Mine came with non standard NiCd button cells, which I had to build a charger for. It's a shame the Red scales faded so easily in sunlight.
tszaboo:
--- Quote from: Aldo22 on August 19, 2024, 02:40:15 pm ---
--- Quote from: tszaboo on August 19, 2024, 12:41:09 pm ---Even a 34401A is going to measure 300KHz with 4% accuracy. 100KHz is 0.5% or 0.04dB.
--- End quote ---
I don't know what you're trying to say.
I'm talking about a rotten 50 year old analog meter sitting in the basement and you're talking about a $1000 top of the line DMM.
What's the connection?
--- End quote ---
The 34401A is a 25 year old, now obsolete meter.
Saying that an analog meter can do x unlike digital meters, then getting upset because it's not true?
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