Electronics > Beginners
Capacitors in a Fluke multimeter
(1/1)
windsmurf:
I've been looking at the back of a Fluke 26-3 meter, and see these fairly large capacitors (7.3mm length on the bigger ones).

I have a couple of noob questions regarding them.
What is the manufacturer/brand of these caps?
What is the red stuff underneath these caps?
Is the notation used to signify their values a standard?  E.g. I can't decipher voltage or tolerance... does it not exist on these?

 

Cnoob:
The red stuff is some form of glue, used to keep components in place for wave soldering.
As for the capacitors I found they they are Tantalum capacitors. [url][https://www.alibaba.com/showroom/tant-cap-100uf.html/url]

Markings are I think are 47uF 10V working and 15uf 10V working as for manufacture no idea.

other one is 4.7uf 20V working
tooki:
They're Vishay polymer tantalum caps. The "K5" and "K7" markings are date codes meaning May 1998 and July 1998, respectively. The 2 in a circle means Vishay. Then the value is microfarads and volts, so 4.7-20, 47-10, and 15-10 mean 4.7uF 20V, 47uF 10V, and 15uF 10V, respectively. They do not have any tolerance, temperature, or model markings.

https://www.vishay.com/capacitors/tantalum/tantalum-polymer/
http://www.vishay.com/docs/40110/faq.pdf


The red stuff is, exactly as Cnoob said, glue to secure the components for wave soldering.
windsmurf:
Thanks Cnoob, and tooki for the complete explanation!  ^-^
retiredcaps:
Fluke 77 III service manual has the values and schematics.
Navigation
Message Index
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod