Gas Tracing
Gas isolation tracing yields different results than electric isolation tracing, as demonstrated by the example below.
- After selecting the desired Operational Map, zoom/pan to the area of interest.
- Click the Isolate
button in the lower right corner to enable
it, at which point it turns green, 
, then click the desired location in the map. A blue circle appears
where you clicked. 
The results show the number of Affected Customers, along with Open and Closed Valves. They are displayed both in the map and in the Trace pane, which opens automatically if it isn’t already open. The trace is color-coded in gold.
TIP: Regulators are not treated as sources when a trace moves from a higher pressure zone to a lower pressure zone. In this case, the regulator is not considered an isolation point and the trace continues through the regulator.
- You can place squeeze-offs anywhere on a pipe that is part
of the trace. This can be done by either clicking the Squeeze-offs
button or by opening the clickwheel at the location where you want
to place a squeeze-off. Opening the clickwheel is dependent upon
the type of device you're using. On a laptop, right-click on the pipe.
On a touch device, perform a long-press with your finger (hold
on the pipe for more than ½ second) or use the alternative button
(usually located on the side) on the stylus.
With the clickwheel open, click Place Squeeze-off. Click Close to dismiss the clickwheel without applying a squeeze-off. Once a squeeze-off is applied, the Trace pane changes to offer additional squeeze-off options.
- Click the pipe at each location where you want a squeeze-off.
Squeeze-off symbols are added to the map. Click on the squeeze-off
to remove it. When you’ve placed all the squeeze-offs you want,
click Re-Trace to re-execute the trace. Click Back to return to the
current trace results without re-tracing.
- To remove squeeze-offs, either click the squeeze-off symbol to remove an individual squeeze-off or click Remove All Squeeze-offs to remove them all.
- You can ignore open valves by either clicking the Valves
button or by opening the clickwheel on the valve you want to ignore.
Opening the clickwheel is dependent upon the type of device you're
using. On a laptop, right-click on the pipe. On a touch device, perform
a long-press with your finger (hold on the pipe for more than ½
second) or use the alternative button (usually located on the side) on the
stylus.
With the clickwheel open, click Ignore. Click Close to dismiss the clickwheel without ignoring the valve. Once a valve is ignored, the Trace pane changes to offer additional valve options. - Click Ignore next to the valve you want to ignore. Ignore
as many valves as you want. Note that when the list of valves is expanded,
the map displays markers for the valves. You can also click on the
map marker to ignore a valve.
- Click Re-Trace to restart the trace. The new trace results
display in the map and the Trace pane changes accordingly to show
the new numbers of affected customers, operating pressures, open valves,
and closed valves. Valves are listed in alphabetical order, so valves
that are part of a new trace aren't necessarily displayed at
the bottom of the list. There is an orange dot to the left of each
ignored valve, and a red dot to the left of each non-ignored valve.
- To no longer ignore valves, click the valve to stop ignoring it. Click Re-trace to restart the trace.
- To view details of a particular valve, expand either the Open Valves or Closed Valves list. Map markers appear in the map to mark the valve locations.
- Click on the valve you’re interested in. A View button is provided to the right of the valve. Click it to view attribute details. Alternatively, double-click the valve to view attribute details.
- Click the Clear button in the top right corner of the Trace pane to clear out the results of the current trace.