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LOOP CHECK Operator’s Guide

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Loop Check - Instrument technician's guide

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LOOP CHECK

Operator’s Guide

4-20mA signals (Conventional, HART)

Verify that the applicable parameters (span, alarm set point) are correct (Loop folder INTools data as the official reference)

4-20mA signals (Conventional, HART)

Analog Input Field:

– force input to 0%, 50%, 100% of span Control Station:

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

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

– Check burnout for Thermocouple loop

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

Digital Input/Output signals

Verify that the alarm set-point is correct (0 or 1 to alarm - Loop folder INTools data as the official reference )

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.

Digital Input/Output signals

Digital output Control Station:

– Open Control Faceplate– Force output to energized\deenergized, open,

Field:– verify that Control voltage is received– verify device action if applicable

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)

Fieldbus Devices

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

– Open Control Faceplate– Set PID mode to Auto (set mode to cascade for cascade

PID control)– Set PID set point to 50%

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

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

– verify correct Valve action (control action, fail action)

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. 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)

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 (Control graphics / Faceplate) if applicable.

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, 2oo3 LL, etc.)

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

Control Station:– Verify UZ display shows shutdown

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loop check

Documents

control graphics faceplate

span control station

shutdown control station

control voltage

applicable field

action field

inactive alarm field

field device