Dear David, Andy and others:

Thanks you for the suggestions. I am going to use fan and the conducting 
compound. What brand of that compound you use, David?

Thanks.

Dachun



On 2016-05-12 14:47, David Mucciarone wrote:
> I'm not sure what KC you have so this may or may not be helpful.
> Depending on how the previous heat cartridges came out it is possible
> that during removal the hole enlarged. If this happened, water can
> work it's way in and cause early failure. This happened on my KCIII.
> The solution was to shim with copper soil (had it on hand, other foil
> could be used), given the thickness of my foil, I simply wrapped the
> cartridge with one layer of foil to provide a snug fit. I then used a
> conducting compound to seal the top. This is a non hardening compound,
> I am on the road, but will be in the lab, hopefully on Friday (if my
> flight ever gets off the ground) in the event you need more info on
> this potential solution.
> 
> David
> 
> Sent via the Samsung GALAXY S®4, an AT&T 4G LTE smartphone
> 
>  -------- Original message --------
>  From: zhangd <[log in to unmask]>
>  Date: 05/12/2016 14:55 (GMT-05:00)
>  To: [log in to unmask]
>  Subject: Frequently broken heater and thermocouple of Kiel
> 
> Dear Colleagues:
> 
>  Both the new heating cartridge and measuring resistor in our Kiel
> device
>  trap 1 are broken (not the same time) in less than two month. It
>  happened twice already. Any suggestions would be appreciated.
> 
>  Thanks.
> 
>  Dachun Zhang
>  ESS dept UCI