844-845 / 973
a CSA International company
FMEA of the (close/open)
Circuit type B
Market is still under the belief that PST is a diagnostic tool , hence
credit is claimed for without further assessment to PST firmware.
Ignoring that PST is a complementary test to FST coverage.
The good news is that the WIB process automation , FE WG has
addressed the PVST certification as published in the 69
th
Annual
Instrumentation Symposium for the process industry in Jan. 2014.
the link:
http://instrumentation -s ymposium.che.tamu.edu/2014 - symp/2014- p rogram.
PVST article can be downloaded from:
http: //www.siracertification.com/resources.aspx?page=173Recommendation is to form a FS group such asT6A acting as
independent body for market review certification.