[foxboro] BADOPT=3 and OSV

This weekend we ran into a situation that caused some critical transmitters to 
hit the high end of their scale and exceed the default 2% OSV.  Since we use 
BADOPT=3 this marked these AIN's as bad causing undesired control action (since 
the transmitters were not truly BAD).

Could someone share their philosophy or rules used for setting OSV's?  We don't 
want to make the OSV too large as to render this feature useless.  Also, I want 
to keep the instrument departments involvement to a minimum.

Thanks,
Rory Loupe
Dow Chemical

 
 
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