Siemens CALOMAT 6 - Safety characteristics

Siemens AG
13 Safety Manual CALOMAT 6 Gas Analyzers
07/2010, A5E00729184-02
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:
 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.
See also
Settings (Chapter 3-3)
SIL Declaration of Conformity (Chapter A.1)