Isolation Trace dialog

This dialog is used to control the isolation trace process. The isolation trace is used to determine the nearest valves to be closed in order to isolate one or more selected pipes. The trace works outwards from selected links until the tracing tool reaches pre-defined boundary points.

The dialog is displayed (when a network is open) by choosing Tools | Isolation trace .

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Item

Description

Assume pipes can be closed at

Well nodes	Items selected here are boundary points where the trace will assume a pipe can be closed and will therefore stop.
Transfer nodes
Area change
Fixed head nodes
Reservoir nodes

Set closed links from selection

Optional if a selection was made on the GeoPlan before the dialog was opened.

A selection of links that are to be assumed as available to be closed for isolation purposes.

This selection can be used in addition to, or instead of, the boundary point options set in Assume pipes can be closed at.

You may wish to use this if there are known locations where links can be closed that will not be picked up in Assume pipes can be closed at.

Set valves to ignore from selection

Optional.

A selection of valves that can be ignored when deciding where links can be closed.

In interactive mode, you will be asked if you want to close the corresponding link or leave it open.

Set isolated objects from selection

A selection of objects that are to be isolated on the network.

The isolation trace will start from the link(s) in this selection.

Close downstream valves

If unchecked, it is assumed that valve closure can occur at links whose closure would cut off a supply of water to the area being isolated. In interactive mode, this means that you will be prompted to take an action only on links located on the upstream side of the pipe(s) being isolated.

If checked, the isolation trace will prompt for valve closure for all links specified in the Assume pipes can be closed at section and whose closure would cut off the area to be isolated, regardless of whether any water is supplied via such a link. This means that you may also be prompted for downstream links.

This checkbox has a similar effect on the isolation trace behaviour in the non-interactive mode.

Non interactive mode

If checked, sets the isolation trace to non-interactive mode.

Makes the Valves button available.

Buttons

Valves	Available if Non interactive mode is checked. Displays the Boundary Valves dialog, which is used to specify which valve types are to be used as boundary valves. The trace will work outwards from selected links until it reaches pipes that are assumed closed, the limits of the network, or boundary valves.
Markers	Opens the Choose Spatial Data Types dialog, which is used to select temporary markers to be displayed on the GeoPlan at links identified as assumed closed and to be closed during the isolation trace process. Markers are temporary and will be discarded when the trace is reset or when the GeoPlan is closed. If markers are not required, delete entries in the Choose Spatial Data Types dialog.
Transfer Nodes	Opens the Transfer Node Status dialog, which is used to view the demand associated with transfer nodes in the network and to control whether a transfer is regarded as a demand or a supply.
Report	Opens the Report Options dialog, which is used to identify items that can be included in an HTML report.
Warnings	Enabled when the trace has not managed to successfully isolate the desired objects, having exhausted all the possibilities. When clicked, an associated message is displayed. For example, a message warning that the selected pipe cannot be isolated but is in fact connected to a water supply.
Reset	Removes the trace history and clears all the selections on the GeoPlan. You will have to select a new start node or link before repeating the trace.

Extend selection to include

Customer points	Adds customer points to the nodes and links that will be traced and highlighted as isolated on the GeoPlan.
Spacial data	Adds spatial data to the nodes and links that will be traced and highlighted as isolated on the GeoPlan.

Auto-zoom to link

Applicable when running the trace in interactive mode.

If checked, gives the option of the trace automatically zooming in to the link in question on the GeoPlan.

If unchecked, the GeoPlan window will remain at the current position and zoom setting.

Trace controls

	Rewind	Return to the start of the trace
	Step backwards	Go backwards one step on the trace
	Pause	Not used
	Step forward	Go forwards one step on the trace
	Fast forward	Move continuously forward through the trace

Carrying out an isolation trace

About the isolation trace

About the isolation analyser

Isolation Trace dialog

Report Options dialog

Transfer Node Status dialog

About spatial data

Boundary Valves dialog