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Namur NE107

Aldert Schollaardt

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Wat is de Namur

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Aldert Schollaardt

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Members

NAMUR is an international association of users of automation in process industries.Membership of NAMUR is open only to companies of the process industries, provided that these companies are

manufacturers of chemical or pharmaceutical products, or users of process plants which bear responsibility for operating these plants, or providers of services to chemical/pharmaceutical manufacturers with or without plant operating responsibility; also eligible for membership are organizations with a technical or scientific purpose, e.g. scientific bodies, associations, universities etc.

NAMUR

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127 member companies

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Publications

The results of the work carried out by NAMUR arepublished:

• in NAMUR recommendations and worksheets • in presentations at the Annual General Meeting• in publications which appear in technical journals

(e.g. atp, at, C&A, ChemManager, CIT, etz, GIT,process , P & A, Messtech & Automation, SPS-Magazin, tm )

• in speeches made at workshops and conferences organized by cooperating partners (ARC, DECHEMA, GMA, GVC, ISA, WIB)

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NAMUR recommendations

NA 01 (1967): Noncontacting Initiators and amplifiers• Characteristics proximity switches• IEC 60947-5-6

Current ranges for signal levels of digital transmitters

NE 43: Standardization of the Signal Level for Failure• Discrimination between process and failure information• μP based devices

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NE 105: Specifications for Integrating Fieldbus Devices in Engineering Tools for Field Devices

Device DescriptionConfiguration Tool

Device descriptions must be upward and downwardcompatible for integration.

NAMUR recommendations

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General requirements:

� Ex classification,

� Measurement inaccuracy,

� Electrical connection,

� Permanent interoperability with the process control system,

� No additional functions,

� Others …..

enhanced functionality for the remaining more sophisticated applications

Specific requirements:

� Flow,

� Level,

� Pressure,

� Temperature,

� Actuators

NE 131: NAMUR Standard Device

Field Device Requirements for Standard Applications

� covering 80% of application cases

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NE 132: Coriolis Mass Meter (CMM)

Scope:

� Description of the measuring principle, the main components of a Coriolis mass meter, designs and dimensions, the installation.

� Instructions on use and information about the causes of errors,

� The obtaining of approval from the Office of Weights and Measures (NMi) and calibration.

This recommendation does not stipulate any requirements for use in Safety Instrumented Systems.

NAMUR recommendations

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NE 107: Self-Monitoring and Diagnosis of Field Devices

Diagnostics

� analyze status information (i.e. from field devices)

� with the objective of detecting causes for potential malfunction.

Diagnostics form the basis to remove malfunctions.

NAMUR recommendations

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NE107Device diagnostics simplified

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System Errors and warnings

Diagnostic notification

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Process errors

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Maintenance required

Out of specification

Check function

Failure

Diagnostics active

Diagnostics passive

Diagnostic symbols (NE 107)

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Content NE 107

� Status signals and symbols are defined: failure, check function, out of specification, maintenance required.

� Application diagnostics are defined by end users defined for flow -, level -, pressure -, temperature measurements and control valves.

� More then 300 (!!!) diagnostic functions are defined. Learning curve for manufacturers and end users.

� Requirements for diagnostic functions e.g.: - better no diagnostic then unreliable diagnostic (par. 4.4) - diagnostic has to be allocated flexible to the status signal (par. 5.1)- individual diagnostic functions has to be switched off (par. 5.1)

NAMUR recommendations

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Example Massflow

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Instrument diagnostics

e.g. SIL certified devices (IEC 61508/61511)

Application diagnostics (NE 107)

e.g. Coriolis mass flowmeterGas bubbles in the liquid, Fouling, clogging, Erosion, corrosion, Faulty mounting, external vibrations, pulsating flow, incomplete filling

Application diagnostics are defined for flow -, level -, pressure -, temperature measurements and control valves

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Connect diagnostic to one status signal

On / off switchdiagnostics

Example: mass flowmeter

Coriolis mass flowmeterGas bubbles in the liquidFouling, cloggingErosion, corrosionFaulty mountingAsymmetry of measuring tubes (dual tube only)

External vibrationsPulsating flowIncomplete filling

NAMUR recommendations

Application diagnostics (NE 107)

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Life demo Massflow

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Example Temperature

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Diagnostics for transmitter and thermometer

Sensor

short circuit

Sensor

broken

Sensor

corrosion

ΔT =

T1–T2

T

Drift detection

sensor 1 sensor 2

Alarm or warning

Sensor 1:

FAILURE!Sensor 2:

BACK-UP

Sensor Back-up

Error of sensor 1

= automatic switching

to sensor 2

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Detailed device information

Exact diagnostics information via FieldCare

Information about cause and possible remedy

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„Selectable“ Diagnostics

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Sensor drift detection

ΔT > 3°C

Sensor 1 Sensor 2

120.4°C124.3°C

TR10 +

iTEMP® TMT82TC10

Process

Another application example:

Temperature difference between sensor 1 and sensor 2 must not

exceed 3 °C otherwise a warning signal shall be generated. Application makes sense if 2 different sensor types are used!

warning to the

system

Sensor wire Fieldbus

conductor

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Life demo Temperature

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Vragen

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