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EDS-88A

CapAnalyzer Series II

In-Circuit Electrolytic Capacitor DCR/ESR Tester

OPERATING INSTRUCTIONS

and

OWNER’S MANUAL

©EDS-Inc 1997-2018

For Technical Assistance

parts or FAQs go to

www.eds-inc.com

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Содержание CapAnalyzer 88A Series II

Страница 1: ...EDS 88A CapAnalyzer Series II In Circuit Electrolytic Capacitor DCR ESR Tester OPERATING INSTRUCTIONS and OWNER S MANUAL EDS Inc 1997 2018 For Technical Assistance parts or FAQs go to www eds inc com ...

Страница 2: ...There are several ways a capacitor can fail High temperatures usually cause electrolytics to dry up In high frequency circuits such as digital pulse width power supplies the capacitors tend to leak In low voltage circuits such as system control and low voltage supplies capacitors tend to short partially or completely Therefore the technician must first check all electrolytics for DCR DC Resistance...

Страница 3: ... look for the solder connections under the cap to have a cloudy look After replacing the obviously defective caps it is important to clean the board with a stripper solvent and to check all local feedthroughs as these type of capacitors leak an acidic electrolyte that loves copper After visual observation and replacement of the obvious offenders it will be necessary to measure the rest of the caps...

Страница 4: ...s for low DCR then checks and displays ESR on a 20 segment LED bar scale It includes a low capacitance one handed tweezer test probe and beeps from one to five beeps depending on the ESR reading of the cap Because it is microprocessor controlled it has more features and is much more accurate than the older designs Possibly its best attribute is a three colored chart on the front panel that shows t...

Страница 5: ... to 10 ohms The CapAnalyzer would treat any DC resistance above 10 ohms as normal and warn you if measured DC resistance is lower than 10 ohms In fact you can set the DCR SET ALERT anywhere from a fraction of an ohm by setting the slider all the way down to 0 to as high as 500 ohms DCR Be advised that if you have the slider set higher than 100 ohms and try to measure a very large electrolytic the ...

Страница 6: ...ds very short and solder them in without melting everything in sight Note that if an electrolytic capacitor is in such bad condition to be over 20 ohms ESR the CapAnalyzer will treat it as an open circuit and will not even try to test it The OVER indicator will continue to flash Replace these caps as they are bad no matter what their capacity is If you wish to double check the test probe short the...

Страница 7: ...g will be the same further down the pcb track across another capacitor Finding the one shorted capacitor can be difficult because most DVMs will measure the same short resistance at every capacitor That s because most ohmmeters don t have enough resolution 0 001 ohm to add or subtract the pc board track resistance from the actual shorted cap s resistance to judge where the short might be Some tech...

Страница 8: ...alkaline AAA batteries 6 VDC Although continuous operating time is several hours most users will only need to replace the batteries at three to six month periods We advise to measure a few capacitors then turn off the CapAnalyzer when you find and replace the bad cap If left on without being used a three minute warning timer will chirp three times every three minutes At 5 1 volts the LOW BATTERY i...

Страница 9: ...teristics Limits and methods of measurement EN 61326 1997 A1 1998 A2 2001 A3 2003 Electrical equipment for measurement control and laboratory use EMC requirements Manufacturer Merced Electronics under license permission of Electronic Design Specialists Inc 1343 W 18th St Merced CA 95340 European Contact Eurocoin Ltd Fortune House Moxon Street Barnet Herts GB EN55TS UK Description of Equipment Prod...

Страница 10: ...riod of at least five years following the directive s application to the remaining eight categories the EU has established at least a temporary moratorium for Category 8 and 9 products The EDS CapAnalyzer 88A Series II units made after 2007 use parts that are RoHS compliant but may use conventional solder for reliability In an effort to gain more insight the EU commissioned a study to assess when ...

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