KROHNE OPTISWITCH 3x00C 2wire SIL EN - Manual (Page 3)

1 F unctional safety
1 .1 General
This safety manual applies to measuring systems consisting of
the vibrating level switch OPTISWITCH series 3000 with
integrated oscillator VB60Z:
OPTISWITCH 3100 C, 3200 C, 3300 C
Valid hardware and software versions:
l
Serial number of the electronics >14215176
l
Sensor software from Rev. 1.03
The measuring system can be implemented for level detection
of bulk solids (powders and granulates) which meets the
special requirements of safety technology.
This is possible up to SIL2 in a single channel architecture
(1oo1D), and up to SIL3 in a multiple channel, redundant
architecture.
Note:
With a special factory setting, the measuring system is also
suitable for detection of solids in water (see "Operating
instructions manual").
The SIL declaration of conformity can be downloaded from our
homepage in the Internet.
Further abbreviations and terms are stated in IEC 61508-4.
SIL Safety Integrity Level
HFT Hardware Fault Tolerance
SFF Safe Failure Fraction
PFD
avg
Average Probability of dangerous Failure on Demand
PFH Probability of a dangerous Failure per Hour
FMEDA Failure Mode, Effects and Diagnostics Analysis
λ
sd
Rate for safe detected failure
λ
su
Rate for safe undetected failure
λ
dd
Rate for dangerous detected failure
λ
du
Rate for dangerous undetected failure
DC
S
Diagnostic Coverage of safe failures; DC
S
= λ
sd
/(λ
sd
+ λ
su
)
DC
D
Diagnostic Coverage of dangerous failures; DC
D
= λ
dd
/(λ
dd
+ λ
du
)
Scope
Area of application
SIL conformity
Abbreviations, terms
OPTISWITCH series 3000 • - two-wire 3
Functional safety
32745
-
EN
-
080414