Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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danbob5
 
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Default ESR meter

I built the poptronics esr meter with a FAR circuit board. when i check a
regular cap it works as it should but when i check a electolitic it
generates about 5 to 10 % more voltage at the meter than when the probes
are touched and the meter is zeroed out. I have checked all componet
location & polarity 3 times and the voltages are good checked with meter &
O scope. any ideas?
Dan

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Bob Parker
 
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The first Poptronics article was absolutely riddled with drafting
errors. Later they brought out a lot of corrections. Have you
incorporated those corrections into your meter?

Bob



"danbob5" wrote:

I built the poptronics esr meter with a FAR circuit board. when i check a
regular cap it works as it should but when i check a electolitic it
generates about 5 to 10 % more voltage at the meter than when the probes
are touched and the meter is zeroed out. I have checked all componet
location & polarity 3 times and the voltages are good checked with meter &
O scope. any ideas?
Dan


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Antti Panula
 
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"danbob5" wrote:

I built the poptronics esr meter with a FAR circuit board. when i check a
regular cap it works as it should but when i check a electolitic it
generates about 5 to 10 % more voltage at the meter than when the probes
are touched and the meter is zeroed out. I have checked all componet
location & polarity 3 times and the voltages are good checked with meter &
O scope. any ideas?
Dan



Please consider buying an EVB ESR meter. This piece of equipment is great. I
don't know what is your purpose of checking ceramic or polyester caps
because they almost never wear out. Regular ohm meter should be fine for
those.

http://clientes.netvisao.pt/greenpal/

Antti
OH7GLS



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