Specification Of The Safety Function; Preconditions; Safety Application Conditions (Sac); General - Siemens SITRANS F Additional Operating Instructions

SPECIFICATION OF THE SAFETY FUNCTION

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2.1 Preconditions

The device must be operated within the process and ambient conditions specified in the
handbook ([N1]) of the device.
The following chapter defines additional conditions, which have to be obeyed for safety
applications.

2.2 Safety application conditions (SAC)

INFORMATION!
This chapter defines the conditions which must be met by the operator to ensure safe operation.
Further explanations can be found in appendix I. The safety application condition is valid, while
the related explanation might be incomplete.

2.2.1 General

SAC1: System changes
The flowmeter can be deployed as device with safety responsibility. Non specified changes are
not allowed. Especially after maintenance measures, carrier and operator must ensure that no
hazardous states came up, and that all safety application conditions are still met.

2.2.2 Installation

SAC2: Mounting and connecting
[N1] defines requirements regarding installation and electrical connections of the device. These
requirements are safety critical and must be strictly observed.

2.2.3 Functional safe configuration

SAC3: SIL mode
The flowmeter is functionally safe only if configured for operation in SIL mode.
SAC4: Parameter input
Parameters are changed under responsibility of the operator.

2.2.4 Maintenance

SAC5: Maintenance mode
If maintenance mode (for definition refer to
operated under responsibility of the operator.
SAC6: Resetting the fail-safe flag
Resetting the fail-safe flag is done under responsibility of the operator. He is responsible for the
correct execution of appropriate tests and the evaluation of test results.
SAC7: Firmware update
Firmware may be updated by authorised personnel only.
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Operation modes
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SITRANS FX330
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10/2017 - A5E40875009-AB EN