Yokogawa ROTAMASS TI Coriolis Mass Flow Meter

The device is suitable for "Low Demand Mode" (long average interval between hazardous conditions).

SIL certification: The highest certification under a single (1oo1) configuration is SIL2 (calculated based on the average failure probability (PFDavg) of the entire SIF); The highest certification for device development process is SIL3. When configuring redundancy (hardware fault tolerance level 1), the PFDavg calculation results of the entire SIF can be used for SIL3 scenarios. It is recommended to use a 2% common factor coefficient (β - factor) for redundant configuration.

Environmental and application limitations: The environmental and application limitations of the device must comply with the General Specification (GS) of ROTAMASS Total Insight; If the application limit is exceeded, the reliability data will be invalidated.

Definition and Abbreviations

Core definition: Clearly define terms such as "Safety", "Functional safety", "Basic safety", "Verification", "Validation", "Safety assessment", etc., in accordance with the relevant interpretations of IEC 61508-4 standard.

Key abbreviations:

|Abbreviation | Full name and description|

|DU | Dangerous Undetected|

|FMEDA | Failure Mode, Effects and Diagnostic Analysis|

|IS | Intrinsically safe explosion proof|

|PFDavg | Average Probability of Failure on Demand|

|PLC/DCS | Programmable Logic Controller/Distributed Control System|

|PRM | Plant Resource Manager|

|SIF | Safety Instrumented Function|

|SIL | Safety Integrity Level|

|SIS | Safety Instrumented System|