VEGA FIBERTRAC 31 4 … 20 mA_HART - four-wire With SIL qualification - Manual (Page 29)

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6 Functional safety (SIL)
FIBERTRAC 31 • 4 … 20 mA/HART - four-wire
43386-EN-131119
correctly. If necessary, other measures must be taken to maintain the
safety function.
All parameters changed by the operator are marked automatically so
that they can verified in the next step.
For the verification the PIN must be entered first and a comparison of
two character strings must be carried out. The user must confirm that
both character strings are identical, this is used to check the charac-
ter representation and the communication channels. The verification
texts are provided in German and with all other menu languages in
English.
In a second step, all modified, safety-relevant parameters are listed,
which must all be confirmed. After this process is finished, the instru-
ment will be locked automatically and the safety function is guaran-
teed again.
Warning:
If the described process was not carried out completely or correctly
(e.g. interruption or voltage loss), the instrument remains in the
released and hence unsafe status.
Warning:
In case of a reset to basic settings, all safety-relevant parameters will
also be reset to default. Therefore all safety-relevant parameters must
be checked or readjusted.
Change parameter
Verify parameters/Lock
adjustment
Incomplete process
Instrument reset