Products > Test Equipment
Fluke 189 with leaking surface mount supercap (also Fluke 287, Fluke 289)
Tim5000:
--- Quote from: ketimoi on September 30, 2017, 05:12:59 am ---This thread is so useful no doubt about that. I own a fluke multimeter and seeing some problem with it. I am reading whole thread to figure out my problem.
--- End quote ---
Hi ketimoi, good news is you'll get a lot of help here I'm sure.
And being in the US everything I've read is that Fluke is very much more interesting in doing "the right thing".
I've actually only just got around to revisiting my Fluke 189 meter with this issue so I've ordered what a few others have mentioned - a Panasonic EECS0HD334H.
Will update when I try and fit it - it should be arriving this week.
EDIT: Confirmed that it fitted (with a little trimming of the tabs as it's physically bigger), and time is now held whilst changing batteries.
Marco1971:
Hi, all...my 89 IV and 189 are in the same condition (pristine)...only in the 89 IV there are some signs of leaking. Both from year 2000.
Any issue if intead of 0.1 F i'll use one supercap with another value of capacitance (e.g 0.22 or 0.33 F) ? I just ordered four of this...
Many thanks.
Marco1971.
coromonadalix:
For the moment in my 189
I have removed the supercap, it was rusted
I dont care about the clock, the meter works very well, i did find an physical equivalent at digikey, 0.22f at 5 volts at 1.52$ can, ordered 5 of them but they are out of stock, back order for 2 month ...
bayati:
Hi
I'm sorry to bringing up an old thread and I know it has been talked a lot about this issue but please bear with me because I'm seriously confused.
I have 2 fluke 289. both have corroded cap and they can't hold the time when the battery is removed. I measured it's consumption right after installing the batteries. It draws 10 mA at first but after 1 min it stops at 20-30 uA (I think it charges the cap). Both working perfectly and I don't have any problems in measurements and I think battery consumptions are normal.
Note: I can't send them to Fluke
-- Now my questions:
1. Two people mentioned that after removing the cap their meters broke. How common is that? It can be related to other issues not removing cap?
2. Many substitute caps mentioned. 0.1F 3.3v, 0.22F 5.5v, 0.33F 5.5v? In super caps using higher capacity is dangerous or higher voltage?
3. The meter's firmware is 1.12. Is it better to change the super cap after updating to 1.16 or before that?
4. Should I wait for the cap to get discharged completely then removing them or it does not matter?
5. This question may look absurd but one person mentioned just using hot air to change the cap, not soldering iron?!!! but he did not mentioned why! (I think using soldering iron is better because using hot air, I thing it messes up the calibration)
6. The meters are calibrated in 2011. I don't care about the date but I'm worried that the battery corrosion expands or shorts. what do you thing? should change it?
Thank you in advance.
coromonadalix:
On my 3x 189 they had an 0.1 farad supercap, changed them to 0.33 farad at 5.5 volts, bended the legs to fit pcb pads, i desoldered one side at the time, none of them broke afterwards, while wainting for the caps, i did use them with no problems ??
I did use anti static protocol, not shorted anything in case the supercaps where charged, mine were corroded on top.
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