Functional Safety Manual
for the Memosens transmitter Liquiline M CM42 SIL
Version:
Page:
2.0
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Proof Test Example - Memosens Cable CYK10
0,00E+00
1,00E-04
2,00E-04
3,00E-04
0
1
2
3
4
5
t [years]
P
F
D
a
v
g
(t
)
PFDavg(t)
Target/Allowed PFD
PFDavg(t)
The dotted line is the PFD
avg
(t) value, if the proof test is done after 2 years and 21.6
months. The solid line, if the proof test is done after 2 years and 4 years. And the
straight horizontal line denotes the limit of the PFD
avg
value given by the customer.
11.2
PFD
avg
computation example for a pH measuring point
Note!
The following example can be used as the result for the safety parameters of the
complete Hauser pH SIL measuring chain (see table at end of chapter).
Assume we have a measuring point consisting of the following components from
Hauser:
1.
Memosens pH glass sensor Orbisint CPS11D, SIL
2.
Memosens cable CYK10, SIL
3.
Memosens transmitter Liquiline M CM42, SIL
