
PFD
avg
T
Proof
= 1 year
T
Proof
= 5 years
T
Proof
= 10 years
< 0. 016 x 10
-3
< 0. 079 x 10
-3
< 0. 160 x 10
-3
PFH [1/h] < 2. 1 x 10
-8
/h
The time-dependent process of PFD
avg
reacts in the time
period up to 10 years virtually linear to the operating time. The
above values only apply to the T
Proof
interval, after which a
recurring function test must be carried out.
1510
T
Proof
PFD
avg
1
2
3
4
Fig. 13: Time-dependent process of PFD
avg
2)
1 PFD
avg
= 0
2 PFD
avg
after 1 year
3 PFD
avg
after 5 years
4 PFD
avg
after 10 years
2)
Numbers see in the above charts.
Time-dependent process of
PFD
avg
Functional safety
OPTISWITCH 3100 C - with two-wire output 35
29955-EN-060112
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