Products > Test Equipment

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

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Tim5000:

--- Quote from: mr.fabe on February 06, 2019, 12:30:29 am ---FW v1.16 replaced with v1.41

--- End quote ---

Firmware v1.41 - interesting! I wonder what the changes in that are.
The latest available on their website is 1.16: https://www.fluke.com/en-gb/support/software-downloads/fluke-287-and-289-multimeter-firmware-update

mr.fabe:

--- Quote from: Tim5000 on April 13, 2019, 10:52:04 am ---
--- Quote from: mr.fabe on February 06, 2019, 12:30:29 am ---FW v1.16 replaced with v1.41

--- End quote ---

Firmware v1.41 - interesting! I wonder what the changes in that are.
The latest available on their website is 1.16: https://www.fluke.com/en-gb/support/software-downloads/fluke-287-and-289-multimeter-firmware-update

--- End quote ---

If your unit is working well as it was designed, I wouldn't worry about the firmware changes between v1.16 and v1.41
The major problems have already been addressed.  It does boot fast and the batteries last a long time though... :-DD

Electro Detective:

(Reader Alert: Tired and perhaps one beer too many zone...  :popcorn: )


Would soldering in a small PCB coin battery holder be a proposition, so as to 'plug' in a supercapacitor (with its tabs cut)
giving the meter owner the options of replacement and or removal any time

or perhaps a pair of wires soldered in that tiny spot,
and the supercap and or holder parked elsewhere in a bigger or blank space on the PCB and properly secured. 

-----------------

Here's another brain bender:

is there a simple component addon to act as a one way valve so the supercapacitor can be charged with just enough voltage/current to keep the clock alive for a few minutes during a battery swap,
but ensure there is no way any voltage/current or a short or freaky polarity reversal can kick back at the charge source.

Maybe it's in there already, I don't know  :-//  and haven't gone that far to work it out (no schematic+lazy)

Faulty, underated, temperamental, or shorted supercaps and or the charging circuit overdriven into a short, may have caused grief to 189, 289 and 89IV owners over the years, 
awarding an undeserved bad rep to these fine meters

Fluke could/should have handled this matter a LOT better than just dumping it on the owners to sort it out, surfing for info at forums and Youtube,
or hoping the issue will eventually time out and blow away

or cash strapped battlers can go without, sledge the Fluking meter  :horse:  and wake up to affordable Aneng or better still Brymen/EEVblog meters  8)
and corporats toss them in the dumpster and buy cartons of new Flukes  :-DMM :-DMM    

 :=\

coromonadalix:
@ Electro

This is too complicated for nothing,  a new supercap at 2-4 $ usd and voila, your troubles goes a way for a long time

Electro Detective:

--- Quote from: coromonadalix on April 15, 2019, 01:35:05 am ---@ Electro

This is too complicated for nothing,  a new supercap at 2-4 $ usd and voila, your troubles goes a way for a long time

--- End quote ---

Hi mate, I'm aware of that option for a quick fix  :-+   but sometimes you can forget to check up on a multimeter for a long time, especially if the batteries last,

AND.. maybe have bad luck (that's me  :'( ) with a faulty or leaky brand or batch of supercapacitor AGAIN,

or worse a freaky ESR zap or CAL nuke during the unsolder/soldering  :scared:

and be back to the beginning of the drama, or worse off  |O

These meters are too expensive to easily replace, and no real qualified local techs near me to fix them... for any amount less than the price of a new meter  ;D



I'm leaving them out for now as the meters are working great and no more thinking about what's going on inside or what may happen    :phew:

and I don't mind updating the logger time clock once every few months (or longer) on battery change

and due to Daylight Savings Time here, you have to set the clock back or forward by one hour  :-//   twice a year anyway

 

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