Скачать или смотреть The Crucial Standard that prevents Industrial Disasters

In this essential clip from the "Online Faculty Development Programme" on Instrumentation & Control, Technical Specialist Anant Karegaonkar and Internal Consultant Russell Fernandes dive deep into a critical topic for industrial integrity: the NAMUR NE 43 Standard.

While the industry relies on the standard 4-20 milliamp (mA) signal range for measuring process variables (PVs), this discussion explains what happens when a signal falls outside this normal operating window. The NAMUR 43 standard defines specific limits that classify a signal as a "Bad PV" or a failure state, which is vital for system safety.

Low Bad PV: Learn why any current reading lower than 3.6 mA is interpreted not as a process value, but as a critical error, often indicating a low signal or disconnection in the field device or wiring.

High Bad PV: Understand why readings above 21 mA are also considered a failure state, potentially caused by an overload, a failing field device (like a transmitter), or an issue with the input card itself.

This segment emphasizes how recognizing these out-of-range signals is crucial for engineers. By defining these parameters, control systems can quickly diagnose if the problem lies with the sensor, the input hardware, or the wiring. Most importantly, these failure signals are used in software to implement safety interlocks—automated, corrective actions (like shutting down a pump or valve) to prevent subsequent equipment damage or catastrophic incidents.

Speakers:
Anant Karegaonkar (Technical Specialist, R&D)
Russell Fernandes (Internal Consultant & SME, R&D)

#forbesmarshall #NAMUR43 #InstrumentationAndControl #processcontrol #AnalogSignals #SafetyInterlocks #engineeringeducation #industrialsafety

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Listen on Spotify: https://open.spotify.com/episode/4CCc...

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