loop diagram

Document Type Information
Details and background about this document type.
Description
A diagram showing details all elements of a control loop, from sensing element through to controlling element, and cabling and wiring details for the associated instruments. Includes junction box, marshalling cabinet and control panel terminations and power supply details.
Synonyms
  • CFIHOS ID
    CFIHOS-70000205
Equipment
Equipment that requires this document type.
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A detector that is intended to sense the presence of a specified concentration of a gas.

A chromatograph where a liquid sample is injected and evaporated and subsequently carried to one or more separation columns.

A control valve that is a gate valve and an actuated valve.

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A detecting instrument that is used for measuring or testing.

A process instrument that records values represented by the input signal(s).

A control valve that is a globe valve and an actuated valve.

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A personal H2S monitor is a device that detects the presence of hydrogen sulphide.

A detector capable of detecting both heat and smoke.

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An alarm device that makes a loud warning sound.

A meter intended to measure and indicate and/or produce a signal which represents the measured humidity.

An actuator intended to be operated by hydraulic power.

A controller that is designed or can be programmed to operate and control hydraulic operated systems.

A device which gives a visual indication of a measured value.

A physical object that detects an aspect of something; records, modifies and/or displays such an aspect or performs a combination of these activities.

A distribution board (network card) that is intended for communication between systems, to part of a system or to a computer network.

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A physical object intended to produce an optical radiation, usually visible.

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A detecting element that is intended to determine a level.

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A gauge that is intended to display a representation of a measured level.

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A functional switch that is intended to give an on/off signal when particulate material or fluid level have reached a pre-set value.

A transmitter that produces a continuous standardized output signal dependent of a received input signal from a level sensor.

A detecting element intended to measure corrosion using electrical conductivity.

An analyser for liquid.

A detector which is capable of detecting selected types of liquids.

Registers
Registers where this document type is included.
A collection of all instrument set points and/or alarms. Each instrument having an alarm or trip function is listed. Alarms and settings are given as percentages of transmitter range and in engineering units, together with transmitter range, location of the annunciation point, cabinet, identification and relevant P&IDs/PEFS or logic drawing.
An authoritative collection of values with a relationship to instrumentation. The columns of this collection is specified and controlled.