Characteristic Safety Values; Useful Lifetime - Pepperl+Fuchs SIL VIM8 Series Manual

Functional Safety Vibration Sensor VIM8*
Planning
3.3

Characteristic Safety Values

Parameters
Assessment type and documentation
Device type
Mode of operation
SIL
PL
DC/DC
avg
Category

sd

dd

no part

total (safety function)

du

dd
SFF
PFD
PFH
MTTF
MTTF
d
CCF
Reacktion time
Table 3.1
1
With an average expected requirement rate of fewer than 25 times per year
3.4

Useful Lifetime

The measuring system has a useful lifetime of 10 years.
Characteristic values
Full assessment
B
Low demand mode or high demand mode
2
d
95 %
2
600 FIT
350 FIT
80
1030 FIT
15 FIT
350 FIT
94 %
-3 -2
 10 to < 10
-7 1
< 2 x 10 1/h
112.43 years
329.85 years (high)
95 (fulfilled)
200 ms
13