[TechAssist] Re: A question for ESR meter users
- From: jmgoins.tn@xxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 16 Oct 2001 17:09:30 -0400
http://members.ozemail.com.au/~bobpar/esrmeter.htm
is a good link with info on the Electronics Australia (Dick Smith ) ESR
meters. I believe this was where I found troubleshooting information when I
built mine. (anybody building one should make a picture or scan or copy of
the board before starting construction to make finding a solder bridge
easier )
They are essentially a low-ohms ohmeter with an alternating (audio
frequency?) reference source, instead of a DC one.
They have a series blocking cap in their output ot protect their circuitry,
but the above web page points out that a cap charged to 300v in a PS could
damage one.
Mike Goins jmgoins.tn@xxxxxxxxxxx
At 11:07 PM 10/16/01 -0400, you wrote:
>
>
>Barry,
>I was under the impression, checking a charged cap with the capanalyser can
>blow the tester.
>With Dick Smith ESR meter, you do not run that risk.
>Every shorted cap, with the DS ESR meter shows 0.
>I zero the meter before each use and it works great.
>Most bad caps read excessively high/
>
>Jeff www.9-11-2001tragedy.com
>Help those affected by the NY/PA tragedy:
>The Red Cross needs is mobilizing a national blood drive and needs your
>help. Please call 800-GIVE LIFE, to find out where in your area you can
>donate blood.
>FAX 1-413-280-0677
>Intrepid Video & Electronics
>Harrisburg, PA 17111
>717-909-8844
>www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>
>
>----- Original Message -----
>From: "Barry Appleby" <burintv@xxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Tuesday, October 16, 2001 10:14 PM
>Subject: [TechAssist] Re: A question for ESR meter users
>
>
>>
>> [esr meters]. I have been fooled by a shorted
>cap
>> when using the dick smith but never when using the capanalyzer 88 . It
>> discharges the cap and checks for short before it checks esr . It has a
>DCR
>> ohms adjust to tell how many ohms the shorted cap has . I don't fancy it's
>> flashing leds but have learned to live with it .
>> Barry Appleby .
>>
>>
>> >From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
>> >Reply-To: techassist@xxxxxxxxxxxxx
>> >To: <techassist@xxxxxxxxxxxxx>
>> >Subject: [TechAssist] Re: A question for ESR meter users
>> >Date: Tue, 16 Oct 2001 16:27:47 -0400
>> >
>> >
>> >Duh......the DC through me off.
>> >
>> >Jeff www.9-11-2001tragedy.com
>> >Help those affected by the NY/PA tragedy:
>> >The Red Cross needs is mobilizing a national blood drive and needs your
>> >help. Please call 800-GIVE LIFE, to find out where in your area you can
>> >donate blood.
>> >FAX 1-413-280-0677
>> >Intrepid Video & Electronics
>> >Harrisburg, PA 17111
>> >717-909-8844
>> >www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>> >
>> >
>> >----- Original Message -----
>> >From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
>> >To: <techassist@xxxxxxxxxxxxx>
>> >Sent: Tuesday, October 16, 2001 11:21 AM
>> >Subject: [TechAssist] Re: A question for ESR meter users
>> >
>> >
>> > >
>> > > Duh.........try an ohm meter.
>> > > Jim Myers
>> > > jr.myers@xxxxxxxxxxx
>> > > ----- Original Message -----
>> > > From: "Jeff Dougherty" <jeff@xxxxxxxxxxxxxxxxxx>
>> > > To: <techassist@xxxxxxxxxxxxx>
>> > > Sent: Monday, October 15, 2001 10:52 PM
>> > > Subject: [TechAssist] Re: A question for ESR meter users
>> > >
>> > >
>> > > >
>> > > > DC-resistance is a new one.
>> > > > Can you explain how you test for this, Jim?
>> > > > Thank you.
>> > > >
>> > > > Jeff www.9-11-2001tragedy.com
>> > > > Help those affected by the NY/PA tragedy:
>> > > > The Red Cross needs is mobilizing a national blood drive and needs
>> >your
>> > > > help. Please call 800-GIVE LIFE, to find out where in your area you
>> >can
>> > > > donate blood.
>> > > > FAX 1-413-280-0677
>> > > > Intrepid Video & Electronics
>> > > > Harrisburg, PA 17111
>> > > > 717-909-8844
>> > > > www.intrepid-video.com www.tech-repair.net www.thetoolcaddy.com
>> > > >
>> > > >
>> > > > ----- Original Message -----
>> > > > From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
>> > > > To: <techassist@xxxxxxxxxxxxx>
>> > > > Sent: Monday, October 15, 2001 4:37 PM
>> > > > Subject: [TechAssist] Re: A question for ESR meter users
>> > > >
>> > > >
>> > > > >
>> > > > > An ESR meter does not check capacitance, you'll find that a lot of
>> > > > > capacitors that have a high esr reading will check good on a
>> >capacitance
>> > > > > tester. Also look out for a shorted, dc resistance, cap. ESR meter
>> >may
>> > > > show
>> > > > > it as good. If a cap checks good for ESR, dc resistance and
>> >capacitance
>> > > it
>> > > > > is probably good, if it fails any of the three test it is bad. If
>it
>> > > > passes
>> > > > > all three test and replacement fixes a problem it is still bad.
>> > > > > Jim Myers
>> > > > > jr.myers@xxxxxxxxxxx
>> > > > > ----- Original Message -----
>> > > > > From: <Tvcr9@xxxxxxx>
>> > > > > To: <techassist@xxxxxxxxxxxxx>
>> > > > > Sent: Monday, October 15, 2001 3:08 PM
>> > > > > Subject: [TechAssist] A question for ESR meter users
>> > > > >
>> > > > >
>> > > > > >
>> > > > > > I have found that the ESR meter can not detect a leaky or lower
>> >than
>> > > > > normal
>> > > > > > capacitors, i.e. it will show a good ESR reading but if the
>> >capacitor
>> > > > is
>> > > > > > checked with a regular capacity meter it will be low in value
>> > > > > > Has anyone experienced this also ?
>> > > > > >
>> > > > > > Bill
>> > > > > >
>> > > > > >
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