Hi all, new here and wanted to ask you guys if you can help me understand the device I got.
A few years back I got this Mtester at a local shop but noticed that it sometimes seems to have some errors?
Secondly, I would like to understand how this thing works when for example testing caps, if it needs some kind of calibration of some sort.
The error it seems to give is that when I measure a (used) electrolytic cap and place the leads in socket 1 and 3 it sometimes displays that the cap has zero ESR (ESR reads 0.00) But when I place the same cap into lets say socket 1 and 2 it does display a certain ESR value. Have noticed this happening several times.
I was at that shop and saw the man sell this device to someone and heard of its capabilities and got interested too. So I bought one, not knowing what it was exactly, I mean I did not know that i could be a copy of an original Mtester, still not sure though.
The reason I ask is that I have been given some boxes filled with used and old stock caps and have already gone through some of it to see whats good and what not. Well, that is the thing, some were obvious as they gotten a capactiy of over three times or more of their original size. Others had such a immense large ESR that that was an indicator too as some similar ones (of the same value, type and brand) were still in spec.
But is there a guideline to see when a cap of a certain value is probably out of spec and gone bad?
A few years back I got this Mtester at a local shop but noticed that it sometimes seems to have some errors?
Secondly, I would like to understand how this thing works when for example testing caps, if it needs some kind of calibration of some sort.
The error it seems to give is that when I measure a (used) electrolytic cap and place the leads in socket 1 and 3 it sometimes displays that the cap has zero ESR (ESR reads 0.00) But when I place the same cap into lets say socket 1 and 2 it does display a certain ESR value. Have noticed this happening several times.
I was at that shop and saw the man sell this device to someone and heard of its capabilities and got interested too. So I bought one, not knowing what it was exactly, I mean I did not know that i could be a copy of an original Mtester, still not sure though.
The reason I ask is that I have been given some boxes filled with used and old stock caps and have already gone through some of it to see whats good and what not. Well, that is the thing, some were obvious as they gotten a capactiy of over three times or more of their original size. Others had such a immense large ESR that that was an indicator too as some similar ones (of the same value, type and brand) were still in spec.
But is there a guideline to see when a cap of a certain value is probably out of spec and gone bad?
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