Graham

Additional thoughts ...

Besides being higher than normal temps, down-hole is usually also higher
than normal pressures.

If your customer has not already specified it, even autoclave testing with
DI water can present a good 'proof of life'.

If it's build to print - go for it!  Get all their materials and process
conditions.  Follow their instructions to the letter.  Have fun!  The burden
of design sounds like it is off your shoulders.


... and yes, I do know how to spell 'perspective'.  My finger must have been
on a 'p' break!


Steve Creswick
Sr Associate - Balanced Enterprise Solutions
http://www.linkedin.com/in/stevencreswick
                         616 834 1883




-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: Thursday, June 05, 2014 8:12 AM
To: [log in to unmask]
Subject: Re: [TN] high temp environment

My understanding is that the device can be expected to see 170 C.

regards,

Graham Collins
Senior Process Engineer
Sunsel Systems
(902) 444-7867 ext 211

On 6/4/2014 4:51 PM, Stadem, Richard D. wrote:
> What temperatures will the device see (both external and internal) in the
field?
> There are companies that make equipment for monitoring lava temperatures.
If they can do that, then the inside of an oil well should be pretty ho
hum.....
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
> Sent: Wednesday, June 04, 2014 2:19 PM
> To: [log in to unmask]
> Subject: [TN] high temp environment
>
> Hello Technet!
> We are discussing an opportunity with a customer who is looking at placing
an instrument down-hole in an oil well, hence a high temp environment.  Are
there any good resources around to help me with this one?  Obviously I need
high temp solder (Sn96Ag4?), the components will have to be carefully
picked, and we will need PWBs that will be OK at high temp (polyimide?).
>
> I've got some homework to do! :-)
>
> --
> regards,
>
> Graham Collins
> Senior Process Engineer
> Sunsel Systems
> (902) 444-7867 ext 211
>
>
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