Tweezers for low-impedance capacitors. - Page 1
Forum section: electronics / testgear

author: tigr
author_rank: Regular Contributor
timestamp: January 19, 2018, 04:55:40 pm
content: Hi,The measurement of low-impedance capacitors has always been of great interest in the environment of electronics lovers. Let's see how four meters measure low-impedance capacitors.Rubycon ZLH Low Impedance 1000uF/35v.Max. impedance(100kHz)-0,017Ohm.http://www.rubycon.co.jp/EN/CATALOG/E_PDFS/ALUMINUM/E_ZLH.PDFRussian tweezers HB-14.

author: BravoV
author_rank: Super Contributor
timestamp: January 19, 2018, 05:07:47 pm
content: Are you asking which meters of yours is the most accurate one ?

author: tigr
author_rank: Regular Contributor
timestamp: January 19, 2018, 06:13:05 pm
content: Quote from: BravoV on January 19, 2018, 05:07:47 pmNo, I just restore justice.

author: tautech
author_rank: Super Contributor
timestamp: January 19, 2018, 09:00:48 pm
content: Russian tweezers HB-14Google can't find a source.Link please.

author: kirill_ka
author_rank: Frequent Contributor
timestamp: January 19, 2018, 09:14:13 pm
content: Quote from: tautech on January 19, 2018, 09:00:48 pmhttp://www.rlc-esr.ru/http://rlc-esr.ru/index.php/pintset-nv14(Russian-only)I have an older model. Nice thing, really.

author: tautech
author_rank: Super Contributor
timestamp: January 19, 2018, 09:27:59 pm
content: Quote from: kirill_ka on January 19, 2018, 09:14:13 pmhttp://rlc-esr.ru/index.php/kupitFor ~$122 these are very well priced WRT the Canadian smart tweezers ST5.Need to compare specs .......

author: Shock
author_rank: Super Contributor
timestamp: January 19, 2018, 09:36:21 pm
content: There is at least half a dozen on the market, if you stuff a $20 Atmel LCR clone into a small enough package you can own you very own brand as well.http://www.smarttweezers.org/http://www.lcrresearch.com/pro1/

author: tigr
author_rank: Regular Contributor
timestamp: January 20, 2018, 11:56:47 am
content: Capacitor Rubycon MBZ Ultra Low ESR for PC mother board 3300uF/6,3v.Max.ESR-0,012Ohm.http://www.tetrix.com/products/32470/MBZ.pdf

author: tigr
author_rank: Regular Contributor
timestamp: January 21, 2018, 01:22:36 am
content: Let's see how it measures the capacitors in the circuit. I have already cited this example. The two capacitors are 2200uF 50V in parallel.

author: tigr
author_rank: Regular Contributor
timestamp: January 21, 2018, 03:30:49 pm
content: First conclusions.Incorrect measurement of the capacitance of capacitors. By lowering the readings when measuring in the circuit, creates a false impression of loss of capacitance.Incorrectly measures the ESR of low-impedance capacitors.Raising ESR readings several times, creates a false impression of the suitability of the capacitor, hinders the correct evaluation of the ESR of new and used capacitors.

author: tigr
author_rank: Regular Contributor
timestamp: January 22, 2018, 05:21:01 pm
content: Quote from: Shock on January 19, 2018, 09:36:21 pmI remember once suggested to the LCR Research,to measure the ESR of a polystyrene capacitor K71-7 0.5uF/250v.A even better 2 in parallel.HB-14K71-7 1uF/250v 1%.ESR-0,000 Ohm.

author: tigr
author_rank: Regular Contributor
timestamp: January 22, 2018, 07:49:43 pm
content: For the sake of interest, I measured with my tweezers 200kHz. I got about 0.003 Ohm.

author: BravoV
author_rank: Super Contributor
timestamp: January 23, 2018, 03:52:56 am
content: Quote from: tigr on January 22, 2018, 07:49:43 pmYep, very interesting, cause the meter shows current at 49 uA, while you're speaking resistance.I guess you're confused between Ampere and Ohm.

author: tigr
author_rank: Regular Contributor
timestamp: January 23, 2018, 03:10:18 pm
content: Quote from: BravoV on January 23, 2018, 03:52:56 amI can very clearly see that you have never made an analog ESR meter.There the scale near zero is strongly compresed.The first mark of the scale is 0,005Ohm.This is the payment for the most complex measurements.Look deeper.

author: tigr
author_rank: Regular Contributor
timestamp: February 10, 2018, 12:49:03 pm
content: Tables ESR, stored in the memory of Tweezers HB-14.For standard aluminum capacitors and LOW ESR.The ESR is measured at a frequency of 100 kHz.

author: tigr
author_rank: Regular Contributor
timestamp: February 11, 2018, 10:15:15 am
content: Let's see how the actual ESR tables works. The standard aluminum capacitors.Bad capacitor.1000uF 35v.-5.Shows how still normal.Bad capacitor.2700uF 6,3v.LOW ESR.Abnormally LOW ESR.-22.Shows how still normal.