Products > Test Equipment

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

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BravoV:
Is there any significant change on the battery's life after the replacement ?

SoundTech-LG:
Besides my personal 189, we have one here at work that is used in the RF Lab daily. I inquired as to it's history of battery life, the main user says he thinks it typically lasts over one year. We have not however done an inspection of this one yet . I'm a bit confused on the exact purpose of the SuperCap. Does it's usefullness only come into play during battery swaps, when there is no other voltage present to maintain the memories? Mine is without one now, but if I just power off, and back on, it still seem to retain memory.

BravoV:
That cap's purpose is just to retain the dmm clock during batteries replacement, according to Fluke.

SoundTech-LG:
Thanks...   that's good to confirm,  I was coming to that conclusion. I think I'll just leave it out. Obviously it caused more problems for Fluke, than it solved.

tony3d:
According to CDI The life expectancy seems to be 2.8 years. That is dependent on several factors, one humidity must remain below 50%. Kinda strange for a meter meant to last 10 years!

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