Hardware information

Esr meter - the capabilities to check afar electrolytic capacitor - hardware

 

There is a bit good about esr meter for the reason that above and beyond electrolytic capacitor it can be use to appraise other type of capacitors such as the non polarization capacitor. From esr meter specification, it is as a rule mentioned only glance the electrolytic type. When i began to conduct test with the Dick Smith ESR Meter i found that it have the capabilities to check other type of capacitors as well.

However it is inadequate to read-through capacitor in the advanced value only such as . 1uf(104), . 22uf(224), 1uf(105) and etc. Lower capacitance value don't get any conception from the esr meter due to it can only read until 99 ohms. Conceivably other esr meter such as the B & K esr meter have the range to check it.

You will even be astonished to see that the dick smith esr meter can check the non-polarity capacitor in-circuit (without removing the cap).

True case example-Monitor came in with demonstrate jumping horizontally. You can see a bunch of horizontal black lines athwart the top ceremony (picture). From knowledgeable it will tell you that vertical bit have problem. I begin to troubleshoot the vertical section. Supply voltage checkered ok, vertical driver and oscillator IC replaced, all apparatus allied or close vertical driver and oscillator ic have been check ok. By the way I used digital capacitance meter to check the non-polarity cap and esr meter to check the electrolytic cap. The catch is still there and can't be solve!

When i use Dick Smith ESR Meter to balance the esr value of a non-polarity capacitor located near the vertical driver ic, i noticed that there is a big another in the esr value. The good esr value for a . 22uf non-polarity cap is among 6. 5 to 7 ohm but the spoilt one have a value of 14 ohm! More or less amplify the value, that's why the ceremony jump. The good thing is i open the culprit while the capacitor still in the route which mean this esr meter can check non-polarity cap in-circuit. In spite of this my blessing for you is to connect out one leg and check but for you before now have the knowledgeable in examination apparatus on board. Replacing the cap solved the ceremony problem.

Conclusion-In order to accurately test a non-polarity capacitor, anyway examination the capacitance value and using analog meter to check the accuse and discharge to see if it has develop any short course when under load, you are also compulsory to check the esr value as well.

Jestine Yong is a electronic repairer and a writer. For more in rank about electronic darning entertain visit his website at http://www. noahtec. com/electronic-repair-articles. htm



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