10
1 Functional safety
VEGACAL series 60 • Two-wire 4 … 20 mA/HART
35593-EN-181129
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 ac-
cording to the above failure rates.
A suitable Common Cause Factor must be taken into account.
The measuring system must only be used in a diversitary redundant
architecture!
Specific characteristics
Summary of Contents for VEGACAL 60 Series
Page 1: ...Safety Manual VEGACAL series 60 Two wire 4 20 mA HART Document ID 35593...
Page 11: ...11 2 Supplement VEGACAL series 60 Two wire 4 20 mA HART 35593 EN 181129 2 Supplement...
Page 12: ...12 2 Supplement VEGACAL series 60 Two wire 4 20 mA HART 35593 EN 181129...
Page 13: ...13 Notes VEGACAL series 60 Two wire 4 20 mA HART 35593 EN 181129...
Page 14: ...14 Notes VEGACAL series 60 Two wire 4 20 mA HART 35593 EN 181129...
Page 15: ...15 Notes VEGACAL series 60 Two wire 4 20 mA HART 35593 EN 181129...