Label General Instruments

This category of symbol includes instrument indicators with or without alarms, instrument valve balloons, instruments with I/P converters, and flow elements.

Instrument label data may be inherited from the the owning pipe, equipment or an associated instrument,as set-up in the Instruments - Settings Sub-Category of the AVEVA P&ID Project Administration program. If it is not clear which is the owning pipe, equipment or associated instrument, the List Item Details procedure should be used to identify it.

For instructions on labelling general instruments, refer to Label General Instruments.

There is also a facility to bulk edit instrument labels, refer to Globally Edit Labels.

Label Format

An instrument label consists of up to either four or six parts, depending on project configuration:

• Block

• Function

• Prefix

• Type

• Number

• Suffix

The names of the parts of the instrument label can be changed but the order cannot. Block and Function are only used if the project is set to use 6 tag fields for instruments in the Instrument - Settings Sub-Category of the AVEVA P&ID Project Administration program.

Label Positions

The default instrument label positioning is set in the Instrument Label Positions section of the Instruments - Labels Sub-Category of the AVEVA P&ID Project Administration program. If different label positions are needed for different types of instrument balloons, the default positioning can be overridden by selecting the Instrument Label Positional data option in the List of Values Configuration Category.

Descriptors

A descriptor can be included in the label. Descriptors can be used within other applications when assigning item types to incoming instruments from AVEVA P&ID. For example, a descriptor of Vortex, Magnetic Flow, Coriolis, or Turbine could be used to specifically differentiate between different types of flow transmitters. A restricted choice of item types is available when the descriptor for the instrument is completed.

Label Uniqueness

Each instrument label must be unique on the drawing. In addition, the project may be set to require that selected fields or combination of fields in instrument labels must also be unique.

Add Alarm Labels

Up to six instrument alarm labels can be added, e.g., H - high and L - Low.

The default instrument alarm label positioning is set in the Instrument Alarm Positions section of the Instruments - Labels Sub-Category of the AVEVA P&ID Project Administration program.

If default instrument alarm label positioning is not used, a prompt will be received to manually position the alarm labels on the drawing.

A list of values can be assigned to instrument alarm labels, replacing the need to enter label values manually. Lists of values are defined using the List of Values Configuration Category of the AVEVA P&ID Project Administration program. The default list of values for alarm labels is USERLOV_Alarms, custom lists of values for alarm labels can be created. Enabling the list of values for alarm labels is defined using the Instrument Dialog Labels and List of Values section of the Instrument- Settings Sub-Category.

Automatic Suffix Assignment for Duplicate Instrument Tags

Instruments can be assigned the same tag number, provided that separate suffixes are attached to the tag number of each instrument. The system automatically prompts for the assignation of these suffixes.

Label Instruments with I/P Convertors

The presence of an I/P convertor on an instrument precludes the entry of a descriptor label.

Flow Elements

The flow element symbol category typically includes orifice plates, flow restrictions, venturi, flow straighteners and turbine meters. They all have label balloons attached. It is not possible to pick the flow element itself for labelling - the balloon must be chosen. Labelling is then as for ordinary instruments. No alarm labels are permitted. There are no associated project configuration options.

For information on further aspects of labelling instruments refer to Label General Instruments - Using Instrument Pattern Labels and Label General Instruments - Panel Reference Labels.

Instrument Loops

Instrument loops may be defined, to which instruments may subsequently be added. See Create Instrument Loops for details.

Instruments in a loop can inherit properties from the loop they are assigned to, as set using in the Instruments - Settings Sub-Category of the AVEVA P&ID Project Administration program.