Safety Characteristics - Siemens CALOMAT 6 Instructions Manual

Siemens AG
3.6

Safety characteristics

The safety characteristics necessary for use of the system are listed in the SIL
declaration of conformity (see chapter Appendix). These values apply under the
following conditions:
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See also
Settings (Chapter 3-3)
SIL Declaration of Conformity (Chapter A.1)
The CALOMAT 6 is only used in safety-related systems with a low demand
mode for the safety function.
The safety-related parameters/settings (see "Settings" section) have been
entered by local operation and checked before commencing safety-
instrumented operation.
The CALOMAT 6 is blocked against unwanted and unauthorized changes/
operation.
The average temperature viewed over a long period is 40°C.
All used materials are compatible with process conditions.
The MTTR after a device fault is 8 hours.
The best time to react on a dangerous detected failure is 1 hour.
The logic solver (PLC) has to be configured to detect over range (>21mA)
and under range (<3.6mA) failure of the CALOMAT 6 (Fail High and Fail
Low) and will recognize these as internal failure of the devices and not
cause a spurious trip.
13 Safety Manual CALOMAT 6 Gas Analyzers
07/2010, A5E00729184-02