Gary,
>From experience with security systems only "close" to the
seashore (approx 2 miles away) it is best to *NEVER* have
any of the metal parts under stress/tension, else the
corrosion rates are incredibly accelerated.
The particular stainless steel part had been tested real
time in worse environments with absolutely no degradation
detectable. Yet, in the actual application under mounting
stress the stainless steel part repeatably failed within 1
year even that far away from the ocean.
- Robert -
Robert A. Macy, PE .. [email protected]
408 286 3985 . . . .. . . fx 408 297 9121
AJM International Electronics Consultants
101 E San Fernando, Suite 402
San Jose, CA 95112
On Fri, 10 Oct 2003 09:47:40 -0700
"GARY MCINTURFF" <[email protected]> wrote:
> Ernie,
> I know you received Naftali's email so I will just
> clarify a little more. We test and pass the GR-487
> outdoor enclosure requirements for the telecommunications
> industry but I have a client who is non-telecom.
> Telecommunciations customers seem to accept the test,
> because past experience has shown in meets the equipment
> and time needs (20 years). Non-Telecommunications
> customers not familiar with the tests kind of expect some
> sort of acceleration factor for the hours under test to
> demonstrate how long the equipment will work, rather than
> a more or less pass fail salt fog test. He wants to how
> long the equipment can withstand the elements at his
> coastal location. Is there any sort of acceleration model
> used in the salt fog test, or the mixed gasses and
> hygroscopic tests? He is a little unhappy with my
> current response (understandably) that experience shows
> the test satisfies the screening requirements or else
> they would have been changed long ago to something that
> did meet the equipment and time requirements.
> Can you give me a little insight?
> Thanks
> Gary McInturff
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