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    LOOP CHECK

    Operators Guide

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    4-20mA signals

    (Conventional, HART)

    Verify that the applicable parameters (span,alarm set point) are correct (Loop folder

    INTools data as the official reference)

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    4-20mA signals

    (Conventional, HART)

    Analog Input

    Field: force input to 0%, 50%, 100% of spanControl Station:

    verify correct reading in DeltaV operate (Control

    graphics / Faceplate) verify alarm (HH, Hi, Lo, LL) Settings (Detailed

    Faceplate)

    Check burnout for Thermocouple loop

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    4-20mA signals

    (Conventional, HART)

    Analog Output

    Control Station: Open Control Faceplate.

    Force output to 0%, 50%, 100% of span

    Field: verify that 4, 12, 20 mA is received.

    verify device action if applicable

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    Digital Input/Output signals

    Verify that the alarm set-point is correct (0 or1 to alarm - Loop folder INTools data as the

    official reference )

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    Digital Input/Output signals

    Digital input

    Filed: activate field device if applicable.

    (switches level, pressure, temperature, flow,

    Remote/Local, Start/Stop, etc.)

    Control Station: verify correct indication in DeltaV operate (Control

    graphics / Faceplate) if applicable.

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    Digital Input/Output signals

    Digital output

    Control Station: Open Control Faceplate

    Force output to energized\deenergized, open,

    close

    Field: verify that Control voltage is received

    verify device action if applicable

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    Fieldbus Devices

    Transmitters (Pressure, Temperature, Level, Flow, etc)

    Field: force input to 0%, 50%, 100% of span (Inject signal

    pressure, temperature, etc. whichever is applicable. Or

    simulate PV using AMS)

    Control Station:

    verify correct reading in DeltaV operate (Control graphics /Faceplate)

    verify alarm (HH, Hi, Lo, LL) Settings (Detailed Faceplate)

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    Fieldbus Devices

    Control Valve (PCV, TCV, LCV, FCV, etc) Control Station:

    Open Control Faceplate

    Set PID mode to Auto (set mode to cascade for cascadePID control)

    Set PID set point to 50%

    Field: force input to 0%, 50%, 100% of span (Inject signal

    pressure, temperature, etc. whichever is applicable. Orsimulate PV using AMS)

    verify correct Valve action (control action, fail action)

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    IPS signal

    Analog Input(AI - Conventional, HART) Open IPS C&E display

    Click Reset button to clear inactive alarm Field:

    force input to 0%, 50%, 100% of span (Inject signal pressure, temperature, etc. whichever is applicable. Orsimulate PV using AMS)

    Control Station: verify correct reading in DeltaV operate (Control graphics /

    Faceplate) verify alarm (HH, Hi, Lo, LL) Settings (Detailed Faceplate)

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    IPS signal

    Digital input Open IPS C&E display Click Reset button to clear inactive alarm Field:

    activate field device if applicable.

    (switches level, pressure, temperature, flow, Emergency

    Stop, etc.) Control Station:

    verify correct indication in DeltaV operate (Controlgraphics / Faceplate) if applicable.

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    IPS signal

    Digital output Open IPS C&E display

    Make the related input in the UZ logic healthy. Click Reset button to clear inactive alarm Field:

    simulate any shutdown signal from the field. (HH, LL, 2oo3LL, etc.)

    Verify shutdown signal becomes active (SDV deactivated,Breakers off)

    Control Station: Verify UZ display shows shutdown

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