Products > Test Equipment
Fluke 189 with leaking surface mount supercap (also Fluke 287, Fluke 289)
Helix70:
http://www.fluke.com/fluke/auen/accessories/wireless-accessories/fluke-ir3000-fc.htm?pid=78550
serggio:
--- Quote from: VK5RC on November 23, 2016, 11:44:22 am ---A recent purchase of a 289 view from the inside, looks like they have redesigned the board a little and the Cap has been replaced by a battery??
--- End quote ---
New one revision 017 is pretty interesting... If this is real battery, how long it will support memory without main batteries installed in meter? What will happening when backup battery will completely dead? They will change battery or entire PCB? :)
For super caps mentioned time for keeping data without main batteries installed on meter is about 4 hour.
Also for super capacitors shelf life time is about from 1000 h to several years.
Electro Detective:
--- Quote from: serggio on May 28, 2017, 08:35:32 am ---
--- Quote from: VK5RC on November 23, 2016, 11:44:22 am ---A recent purchase of a 289 view from the inside, looks like they have redesigned the board a little and the Cap has been replaced by a battery??
--- End quote ---
New one revision 017 is pretty interesting... If this is real battery, how long it will support memory without main batteries installed in meter? What will happening when backup battery will completely dead? They will change battery or entire PCB? :)
For super caps mentioned time for keeping data without main batteries installed on meter is about 4 hour.
Also for super capacitors shelf life time is about from 1000 h to several years.
--- End quote ---
This is Fluke's job to solve and FIX FOR FREE -UNCONDITIONALLY- FOR ANY OWNER,
look at the LUDICROUS prices they charge for decent meters :-+ with SILLY problems :-- that DON'T always need a board replacement and a 'yeah it works' -calibration- :-//
serggio:
So other manufactures do not have problem with super caps?
Yes, Fluke offering "lifetime" warranty and probably will solve problem. Past PCB revisions for 280 series used Panasonic EN series supercaps with just 500h shelf life :-- this series has been discounted by Panasonic.
Probably best way is using battery that will able changed by customer. I do not see any reason for using battery soldered directly to PCB.
Electro Detective:
--- Quote from: serggio on May 28, 2017, 09:06:28 am ---So other manufactures do not have problem with super caps?
Yes, Fluke offering "lifetime" warranty and probably will solve problem. Past PCB revisions for 280 series used Panasonic EN series supercaps with just 500h shelf life :-- this series has been discounted by Panasonic.
Probably best way is using battery that will abble changed by customer. I do not see any reason for using battery soldered directly to PCB.
--- End quote ---
BRAVO! :clap: this is EXACTLY what I believe too. :-+
It is SHEER DUMBASS to replace one SOLDERED leaking component with another SOLDERED soon to leak battery component inside an overpriced CAT 111/1V meter !!! :palm: :palm:
that may do WORSE DAMAGE in the future,
usually ONE DAY after the lifetime warranty has ENDED. |O
Whoever pays the bills and wages at Fluke needs to word up the engineers YESTERDAY :=\ :=\ to look inside their CAD computers :-/O and check out the 'user replaceable' BIOS backup battery arrangement on the main board, :o :o
that's been in use across TWO CENTURIES of consumer electronics!!!!!! :palm: :palm:
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