Yes, to add to what Jon has said specific gravity should be included to... When we
use our Omegameter, we set the alcohol concentration to 75% +- 3%.  The machine
figures this automatically by the fluid temperature & the specific gravity.  We
use a 15 minute test & a pass/fail limit of 6.5 ug.  However, it mentions 14 ug in
the Omegameter manual.  Other numbers are used on different equipment (ie,
Ionograph) due to test procedures & calibration techniques.  I think the 6.5 ug
limit we use was set to acheive the Bellcore cleanliness standards.

Rob Watson
Sanmina Corp.
Plant 10 - Durham, NC


Jon Moore wrote:

> In a message dated 7/8/99 10:53:34 AM US Eastern Standard Time,
> [log in to unmask] writes:
>
> << Can anyone tell me what the industry std/limit is for micro grammes of NaCl
>  per sq cm found after ionic testing?  I have a value under 5 and have a set
>  fail limit of 20ug. This is after a 20 min test. >>
>
> While the limit is fairly well documented in several standards, the test
> duration is not.  Over several years of work on ionic contamination testing,
> this was a major point of frustration for me.  Both the test duration and
> fluid temperature should be included in the test specification.  Obviously
> the results are different for a 1 minute test with room temperature fluid vs.
> a 20 minute test with heated fluid.
>
> Jon Moore
> Z-Tech Services