KROHNE OPTISWITCH 3x00C NAMUR SIL EN - Manual (Page 11)

1 5 10
T
Proof
PFD
avg
1
2
3
4
Fig. 1: Chronological sequence of PFD
avg
(figures see above charts)
1 PFD
avg = 0
2 PFD
avg
after 1 year
3 PFD
avg
after 5 years
4 PFD
avg
after 10 years
Multiple channel architecture
If the measuring system is used in a multiple channel
architecture, the safety-relevant characteristics of the selected
structure of the meas. chain must be calculated specifically for
the selected application according to the above failure rates.
A suitable Common Cause Factor must be taken into account.
Specific characteristics
OPTISWITCH series 3000 • - NAMUR 11
Functional safety
32742
-
EN
-
080414