Products > Test Equipment

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

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Muttley Snickers:
The super capacitor in my 289 looks a little bit crusty but the meter still seems to work well and I have listed the current consumption details below for reference. I recently opened and inspected my 189 again and it is still in immaculate condition in relation to the super capacitor, I have owned this meter since brand new and as mentioned elsewhere on the forum I religiously remove the batteries after each use and have always done so.

Fluke 289 Current Consumption

Power Off, Logged for 20 mins.....32uA
Power On, Ohms Open, BL Off......22mA
Power On, Ohms Open, BL Low......36mA
Power On, Ohms Open, BL High......56mA

Firmware Version 1.12/V0.88 (Now upgraded to 1.16)
Calibration Date: 25/07/2010. Calibration Count: 1.  Board ID: 1.

Fonnesbek:
Hi

I have just replaced the super cap in my 189 I also have a 289 but the cap looked ok in that, so I will not change it at this moment.
I replaced the cap with a EDLRD224H3R6C which I got from amazon.co.uk
http://www.amazon.co.uk/gp/product/B017V3X02S?ref_=pe_385721_37038051_TE_3p_dp_1
It can properly be bought cheaper but shipping rate and time was an important factor.

I have attached a few pictures of the replacement, the last one is of the super cap in my 289.

/Fonnesbek

Helix70:
My 287 supercap failed in a different way to most on here. Mine won't hold charge. I took it out, attached it to 3.3V and it immediately jumped to 3.3V drawing 40uA. This current slowly decays over about 2 minutes until it hits about 3uA. I set the meter to >10G input impedance and disconnected the supply, and in 5 seconds the voltage on the supercap dropped to about 2V, then 1.8V after 30 seconds, drawing < 0.02uA.

Needless to say, the meter did not hold date and time, and the corrosion on mine was minimal (ignore the flux on the leads, I put that there).

toni31:
I'm considering purchasing a new fluke 287 from an authorized dealer
does anyone know if fluke has resolved the leaky cap issue

Helix70:
All fixed. Got a 0.1F supercap from RS - a Kemet FCS0H104ZFTBR24. Cost $4 for two delivered.

I had to snip the lower left plastic corner off to make it fit around the SOT23 part, otherwise it fit very neatly. The shroud fits over it without issues.

Tried it for 15 minutes without batteries, all ok. Hopefully with the increased voltage rating this one won't die or leak!

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