7-4
September 2003
TM0048
LaserNET
Program User's Guide
3. To remove the alarm levels from the display, click on the Alarm Levels button again or select Options,
then Alarm Levels from the menu.
7-1.3.3
VIEWING RAW SMOKE LEVELS
When signal referencing is used, the smoke history graph displays the net smoke history in normal mode;
that is, the raw smoke level minus the reference value. However, the raw smoke level alone can also be
displayed as follows.
1. Select
Options
>
Format>Raw Smoke
from the menu.
2. The smoke history graph now displays the raw smoke level, but the vertical axis has been extended to
show a range from 0% to 130%. This allows display of the raw smoke level before the reference value
(a maximum of 30%) is subtracted. An example is shown in Figure 7-8.
Figure 7-8. Smoke History Showing Raw Smoke Data
7-1.3.4
VIEWING SMOKE AND REFERENCE
This feature is only used when Referencing is enabled (see Paragraph 6-5.6). This graph takes the smoke
level from the referencing Detector and subtracts it from the Detector's smoke level. A blue line indicates the
smoke level for the referencing Detector.
7-1.3.5
DISCONTINUITY
Discontinuity is a feature that allows the user to view at what time a Detector was powered down. A yellow
line will appear (as shown in Figure 7-9) to indicate a power-down time. This feature is useful because it
allows a power-down time in the event of a smoke history event. It is suggested that the smoke history data
be saved immediately after an event occurs. (See Paragraph 7-1.5 for further details on how to save smoke
history.)
Summary of Contents for HART XL
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