There is something great concerning esr meter since besides electrolytic capacitor it can be make use of to gauge various other kind of capacitors such as the non polarity thin film capacitor. From esr meter specification, it is generally discussed only examining the electrolytic type. When i began to trying out the Dick Smith ESR Meter i found that it have the capacities to examine various other sort of capacitors also.
However it is limited to examining thin film capacitor in the higher value only such as.1 uf( 104 ),.22 uf( 224 ), 1uf( 105) and etc. Lower capacitance worth do not get any type of reading from the esr meter due to it can just check out up until 99 ohms. Possibly various other esr meter such as the B & K esr meter have the variety to check it.
You will also be surprised to see that the cock smith esr meter could check the non-polarity thin film capacitor in-circuit (without eliminating the cap).
Real instance example-Monitor was available in with display screen jumping flat. You can see a number of horizontal black lines throughout the leading display screen (image). From experienced it will certainly inform you that vertical section have issue. I start to repair the vertical section. Supply voltage checked ok, upright vehicle driver as well as oscillator IC replaced, all parts linked or close-by vertical chauffeur and oscillator ic have actually been examined ok. By the way I used electronic capacitance meter to check the non-polarity cap as well as esr meter to inspect the electrolytic cap. The trouble is still there as well as cannot be fix!
When i use Dick Smith ESR Meter to contrast the esr worth of a non-polarity thin film capacitor situated near the upright vehicle driver ic, i saw that there is a big different in the esr value. The good esr value for a. 22uf non-polarity cap is in between 6.5 to 7 ohm yet the indulged one have a value of 14 ohm! Virtually double the value, that’s why the display dive. The good thing is i discovered the wrongdoer while the capacitor still in the circuit which indicate this esr meter can inspect non-polarity cap in-circuit. However my recommendation for you is to solder out one leg and examine unless you currently have the experienced in examining elements aboard. Changing the cap resolved the display screen issue.
Conclusion-In order to precisely evaluate a non-polarity thin film capacitor, besides examining the capacitance worth and also utilizing analog meter to examine the cost as well as discharge to see if it has develop any short circuit when under load, you are also required to examine the esr worth too.
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