Vega VEGAPULS 61 Safety manual - page 9
1
.4 Setup
Take note of the mounting and installation instructions of the
operating instructions manual.
In the setup procedure, a check of the safety function by
means of an initial filling is recommended.
1
.5 Reaction during operation and in case of
failure
The adjustment elements or device parameters must not be
modified during operation.
If modifications have to be made during operation, carefully
observe the safety functions.
Fault signals that may appear are described in the appropriate
operating instructions manual.
If 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.
An exchange of the electronics is easily possible and is
described in the operating instructions manual.
If due to a detected failure the electronics or the complete
sensor is exchanged, the manufacturer must be informed (incl.
a fault description).
1
.6 Recurring function test
The recurring function test is used to check the safety function,
to detect possible non-detectable dangerous faults. The
function of the measuring system must be checked in
adequate intervals.
The operator is responsible for choosing the type of check.
The time intervals depend on the selected PFD
avg
value
according to chart and diagram in paragraph "Safety-related
characteristics".
With high demand rate, a recurring function test is not
requested in IEC 61508. The function of the measuring system
is demonstrated by the frequent use of the system. In double
channel architectures it is a good idea to verify the redundancy
through recurring function tests at appropriate intervals.
Mounting and installation
In general
VEGAPULS series 60 - 4 … 20 mA/HART
9
Functional safety
31338
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EN
-070510