TM0048
LaserNET Program User's Guide
September 2003
6-8
Delays can be set from zero to 60 seconds in one second increments.
Different delays can be programmed for day and night conditions.
The window will display factory default or programmed settings. To change:
1. Select the Day Delay field in an Alarm or Pre-Alarm box, if desired. Enter the new value.
2. Repeat Step 1 for all alarms
and pre-alarms, if desired.
3. If the Day/Night Option has been selected, then values for alarm delays can be entered for the night
period. Repeat Steps 1 and 2 for the Night Delay field, if desired.
4. Select
<OK>
to save the configuration.
6-5.2.4
CURRENT SMOKE LEVEL
Displays smoke level in real-time in percent of full-scale as well as in %/m or %/ft. (depending on system
configuration).
6-5.2.5
DETECTOR SENSITIVITY RANGE
Allows the Detector's sensitivity range to be chosen. There are two ways to use this feature. Either (a)
Select the sensitivity range by monitoring the current smoke level and adjusting the sensitivity higher or
lower to the desired level, or (b) Use the Auto-Setup feature and let LaserNET automatically select the
sensitivity range of the Detector. If the range does not seem to be sensitive enough, adjust the range to the
desired level.
6-5.2.6
CUMULATIVE ALARM DELAY OPTION
This option is used only if the Alarm Delay option in Paragraph 6-5.2.3 is used. When enabled, this option
prevents an alarm levels delay time from starting until the alarm level below it has activated by completing
its own delay time. In order for this option to work, a time delay must be programmed for each level.
To enable this feature:
1. Check the Cumulative Alarm Delays box.
2. Select
<OK>
to save the configuration.
6-5.2.7
DAY/NIGHT ALARMS OPTION
Allows for a different smoke level threshold and smoke level time delay to be used during the day and at
night. The day smoke thresholds are typically higher and the time delays longer than at night. This is to
adjust for ambient conditions caused by high activity that may be present during the day, and therefore
might cause unwanted alarms.
To enable the day/night option:
1. Check Day/Night Alarms.
2. The Day Start Time field will show the factory default or programmed value. Select this field and enter
the new value in 24-hour format.
3. The Night Start Time field also shows the factory default or programmed value. Select this field and
enter the new value in 24-hour format. The Night Detector light on the main screen will be green during
the programmed night period.
4. Select
<OK>
to save the configuration.
6-5.3
Faults
The thresholds for airflow faults and time delays for fault conditions are configured in this paragraph.
To begin, select
Options>Configure>Faults
. The Faults window (Figure 6-9) opens, giving the current
settings.
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