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they start to change. The Lock-on Mode can help ERT determine when it is safe for
workers to re-enter an area.
The Lock-on Mode is also used to introduce a test chemical while the ACM 150 monitor
is locked onto the area. Lock-on Mode data is archived.
Figure 41. Select a Point Lock-on Scan
The Lock-on Mode screen, Figure 41, allows you to select the area you want to scan. You
can only choose an area that has been set up for monitoring, which is indicated by a green
box. Areas with greyed-out boxes are not set up and cannot be selected.
Figure 42. Lock-on Button
Once selected, this area is scanned at the same rate as regular scanning. The display,
Figure 41Identifies the point (area) number selected. Each time a scan is completed, the
display updates to show the latest data and the number of passes (scans). It continues
scanning the locked area repeatedly until you press “Cancel Lock-On,” or the 60-minute
time-out automatically returns it to the standard scanning mode.