Products > Test Equipment

Fluke 189 with leaking surface mount supercap (also Fluke 287, Fluke 289)

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elex_enthusiast:

--- Quote from: BravoV on February 28, 2014, 05:03:08 am ---
--- Quote from: elex_enthusiast on February 28, 2014, 04:04:29 am ---will it affect the performance of the meter?

--- End quote ---

No, that cap's purpose is just as a backup power for the dmm's clock & calendar during the batteries swapping period.

Not a very serious problem imo, especially you rarely use the logging feature.

Just make sure the new replacement cap has low leakage, other wise it will drain the batteries power even its powered off, as the example of the original cap does when its deteriorated.  :-[

--- End quote ---

yeah i seldom use its logging feature..i only use the meter to measure parameters of the projects im working in my bench..i just want to be sure that replacing the bad cap with a lower capacitance wont affect the performance of my meter since i dont have any reference service manual..does anyone here did the same thing??

i was wondering why fluke didnt use a standard CMOS batterry instead of those shitty caps  to back-up the date/time of the meter :-//.. does it makes any difference?

dr.diesel:
The cap has no effect on meter performance.  It only holds the date/time/backlight settings, no cal data.

t95mwp:
Hi folks,I replaced mine capacitor on 189 after it died and never come back alive. Anything else known wrong with this meter,yes I installed capacitor right and new fresh batteries  :). Thanks

elex_enthusiast:

--- Quote from: dr.diesel on February 28, 2014, 10:36:26 am ---The cap has no effect on meter performance.  It only holds the date/time/backlight settings, no cal data.

--- End quote ---
indeed.. i have replaced mine with a 0.06F bnew cap and it worked fine..thanks for the advice..this time the date/clock remains after i remove the battery for 10-15 sec...

elex_enthusiast:

--- Quote from: t95mwp on March 27, 2014, 10:02:30 pm ---Hi folks,I replaced mine capacitor on 189 after it died and never come back alive. Anything else known wrong with this meter,yes I installed capacitor right and new fresh batteries  :). Thanks

--- End quote ---

maybe the supercap is not an issue with your dmm..have you checked the board..?

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