Siemens AG
9 Safety Manual CALOMAT 6 Gas Analyzers
07/2010, A5E00729184-02
3
Device-specific safety instructions
3.1 Applications
The Hardware assessment of the CALOMAT 6 shall provide the safety
instrumentation engineer with the required failure data as per IEC 61508 / IEC
61511 and does not include an assessment of software.
The hardware of CALOMAT 6 satisfies the special requirements in terms of
functional safety to SIL 1 in accordance with IEC 61508 or IEC 61511-1.
The CALOMAT 6 is usable in safety applications to monitor limits.
3.2 Safety function
The CALOMAT 6 is mainly used for user defined threshold monitoring. Only the
analog output 4.20 mA (NAMUR) was calculated as safety function. The danger-
ous failure is a deviation of the output current of ±5% full span.
Warning
The binding settings and conditions are listed in the “Settings” and “Safety
characteristics” sections. These conditions must be met in order to fulfil the
safety function.
When the safety function has been executed, safety-instrumented systems with
no self locking function should be brought to a monitored or otherwise safe
status within the Mean Time To Repair (MTTR). The MTTR is 8 hours.
The calculated Mean Time Between Failure (MTBF) for CALOMAT 6 is 78 years.
Reference
Instruction manual CALOMAT 6E/F (Order number see chapter 1.3)
See also
Settings (Chapter 3-3)
Safety characteristics (Chapter 3-6)
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