Vega VEGAPULS 61, Safety Manual

Page: 9 / 16

1 . 4 S etup
T ake note of the mounting and installation instructions of the
operating instructions manual
.
I n the setup procedure , a check of the safety function by
means of an initial fi lling is recommended .
1 . 5 R eaction during operation and in case of
failure
T
he adjustment elements or device parameters must not be
modi fi ed during operation .
I f modi fi cations have to be made during operation , carefully
observe the safety functions .
F ault signals that may appear are described in the appropriate
operating instructions manual .
I f faults or error messages are detected , the entire measuring
system must be shut down and the process held in a safe state
by other measures
.
A n exchange of the electronics is easily possible and is
described in the operating instructions manual .
I f due to a detected failure the electronics or the complete
sensor is exchanged
,
the manufacturer must be informed
(
incl
.
a fault description ).
1
.
6
R ecurring function test
T he recurring function test is used to check the safety function ,
to detect possible non - detectable dangerous faults . T he
function of the measuring system must be checked in
adequate intervals
.
T
he operator is responsible for choosing the type of check
.
T he time intervals depend on the selected PFD
avg
value
according to chart and diagram in paragraph
"
S afety - related
characteristics " .
W ith high demand rate , a recurring function test is not
requested in IEC
61508
. T he function of the measuring system
is demonstrated by the frequent use of the system
. I
n double
channel architectures it is a good idea to verify the redundancy
through recurring function tests at appropriate intervals
.
M
ounting and installation
I n general
VEGAPULS series
60
-
4
…
20
m A / HART
9
F unctional safety
31338
-
EN
-
070510