I got into one of those rare lab moods early today
and decided to takes my chances and de-solder the supercrapacitor from both the 189 and 289,
with no intention of replacements same or better,
and damn the torpedoes...
Got everything set up ready to unsolder, ensure no ESR drama, thinking about somehow safely discharging any residual charge from the supercaps first,
and... WHOA! wait a minute!
I went another way:
I CAREFULLY used my sharp sidecutters to cut the top metal tab off the supercap,
slowly lifted back the supercap to about 90 degrees max,
bent it back and forth a few times, supporting the back so no pressure on the PCB solder area,
till the bottom supercap tab snapped off clean
Cleaned up with isopropyl alcohol > Job done
Both meters working perfect, set their clocks, and no more suss supercrapacitor issues to think about,
or rant on and Fluke bash at 189/289 posts
FWIW: the supercap tab remnants can be unsoldered any time in the future if I (no chance!
)
or the next owner wants to wack in a supercap, and resume the saga I just ended
i.e.
No Fluke was harmed by this procedure to remove a malignant tumor Happy Fluke Camper again