Technical Data; General Notes - Siemens SITRANS F Additional Operating Instructions

TECHNICAL DATA

5

5.1 General notes

• The safety relevant key indicators (for details refer to
27) are related to the safety function (for details refer to
• Commissioning and use of the device presupposes agreement with its design and
performance characteristics. This includes ambient and process conditions (refer to
handbook [N1]).
• The values shown in the table for the safety relevant key indicators have been determined for
an environmental temperature of +40°C / +104°F and below. For higher temperatures refer to
Useful lifetime
• Failure rates are assumed to be constant during the useful lifetime (for details refer to
lifetime
• Failure rates do not include mechanical wear of the sensor and bluff body. The operator is
responsible for observing the specification for intended use (refer to chapter "Intended use"
in [N1], respectively for adequate inspections if the device is deployed out of specification and
damages caused by the process need to be assumed.
• Installation of the device must be in accordance with the instructions and the requirements of
the application.
• All components that are not necessary to execute the safety function and cannot influence the
safety function are not included in the calculation of the failure rates.
• External power failure rates are not included in the calculation of the failure rates.
• The FMEDA of the device was calculated with the exida tool FMEDA v7.1.17. The tool uses the
latest values from the database SN 29500 [N3].
24
on page 29.
on page 29).
www.siemens.com/flow
Safety relevant key indicators
Operation modes
on page 10).
10/2017 - A5E40875009-AB EN
SITRANS FX330
on page
Useful