Capacitor ESR Tester - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 27th December 2002, 01:19 AM   #1
diyAudio Member
 
Neutron Bob's Avatar
 
Join Date: Jul 2002
Location: San Clemente, CA
Send a message via Yahoo to Neutron Bob
Default Capacitor ESR Tester

HELP!!!

I found something very cool about two weeks ago: a digital DIY tester for ESR (equivalent series resistance) testing of electrolytics.

Apparently, I did NOT save the link in my bookmarks....I'm sure you know how that goes. Well, whilst I browse my IE history later, I hope someone has happened upon this little device:

The device has a 3-digit LED display, and applies an AC waveform to the test leads. One cannot use coiled test leads of course, as they are tricky inductors! It is autoranging, and reads fractions of an ohm. The kit included a temperature-vs-ESR chart as a guide, and here's the best part: it was about $50!!!

Especially for those of us interested in switching mode power supplies, dynamic testing of those highly stressed electrolytics is a wonderful thing.

Bob
  Reply With Quote
Old 27th December 2002, 07:17 AM   #2
diyAudio Member
 
Neutron Bob's Avatar
 
Join Date: Jul 2002
Location: San Clemente, CA
Send a message via Yahoo to Neutron Bob
Talking ESR Tester!

I knew I would find the wee beastie! Best part: it's a DIY project as well, from the Anatek repair website.

http://www.anatekcorp.com/testequipment/esr.htm

This device allows one to test capacitors with about 5 mV at about 100kHz...it displays the ESR with a digital display.

Bob
  Reply With Quote
Old 22nd March 2004, 04:41 AM   #3
diyAudio Member
 
Join Date: Aug 2003
Location: Indiana USA
Hello,
I have never thought about this...
How do you guys measure the actual ESR in the circuit? If there is no tester like this?
When I try to model the PSU, I use the ESR provided by capacitor manufactuere..., but we know it's only a estimate.
lhchen
  Reply With Quote
Old 22nd March 2004, 05:32 AM   #4
sam9 is offline sam9  United States
diyAudio Member
 
sam9's Avatar
 
Join Date: Jun 2002
Location: Left Coast
I built one of the "Dick Smith" ESR meters sold by Anatek. It seems to work quite well. There isn't much need for it when dealing with new components at least so far as go/no-go decisions. In trying to figure out whats wrong with older stuff it's been helpful.

The one place where it was helpful with new components was comparring brands when getting the lowest ESR I could find was an issue.

Comparale commercial meters seem to be around US$150-$250.
  Reply With Quote
Old 9th April 2004, 08:24 AM   #5
diyAudio Member
 
Join Date: Apr 2004
Location: Darwin, NT, Australia
SiliconChip (Oz electronics mag), have just released a new version of their ESR Meter. Looks pretty good!

http://www.siliconchip.com.au/cms/A_101187/article.html

Dick Smith is again selling this Mk.2 version.
__________________
Nic.
  Reply With Quote
Old 9th April 2004, 04:58 PM   #6
sam9 is offline sam9  United States
diyAudio Member
 
sam9's Avatar
 
Join Date: Jun 2002
Location: Left Coast
It looks a little different. Mostly the table on the front which may have been updated to more accurately reflect typical ESRs one finds today.
  Reply With Quote
Old 9th April 2004, 06:11 PM   #7
diyAudio Member
 
Join Date: May 2002
Location: Plano , TX
Send a message via AIM to jewilson
I would question how well these unit work a frequencies of 10Mhz or higher. I have done this ESR testing, however it was on a expensive HP circuit analyzer.
__________________
Jim W.
  Reply With Quote
Old 9th April 2004, 06:19 PM   #8
diyAudio Member
 
Join Date: May 2002
Location: Plano , TX
Send a message via AIM to jewilson
There are other ways to do this. Get a sting of 74ACT04 and some 74ACT74 on a board connected with a 10 MHz clock. Leave some pad for connecting the UUT then connect the caps. You want to test measure across gnd and power and look at the results on a scope. You will be able to verify the noise reduction that way.

The 74ACT part will generate alot of noise...
__________________
Jim W.
  Reply With Quote
Old 9th April 2004, 06:37 PM   #9
sam9 is offline sam9  United States
diyAudio Member
 
sam9's Avatar
 
Join Date: Jun 2002
Location: Left Coast
I read a review that compared this to a B&K Precision unit and to another whose name I don't recall. If I could find it, I would post the URL. Anyway, the DS unit tied with the B&K in terms of accuracy. I'm quite sure of that part. I think the B&K had a leg up on ease of use but costs about 3 times as much.

From personal experience the DS works well enough to locate bad electros in old gear. However, somewhere in the review it stated that a "bad" ESR a reading does not neccessarily identify all "leakers", but that is the case for all ESR meters.
  Reply With Quote
Old 9th April 2004, 06:45 PM   #10
diyAudio Member
 
Join Date: May 2002
Location: Plano , TX
Send a message via AIM to jewilson
See, I guess I am looking at it as performance indicator of high low a good ESR type is. I guess that it is really more for trouble shooting.
__________________
Jim W.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Me and my Tan Theta Meter (Capacitor tester) Mooly Parts 27 15th April 2014 06:52 AM
Sencore CRT Tester Space1 Swap Meet 0 12th July 2009 06:27 PM
Capacitor tester Bicycleguy Equipment & Tools 0 18th November 2006 01:26 AM
Have you seen this tester? smak Tubes / Valves 30 28th January 2006 07:43 PM
uC DAC tester? emuman100 Digital Source 40 23rd July 2004 05:08 AM


New To Site? Need Help?

All times are GMT. The time now is 05:04 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2