3-18 AeroTrak
®
Handheld Airborne Particle Counter
To acknowledge the alarm and silence the buzzer, tap the alarm
icon .
• In Differential modes (Δ), disabling one or more channels will
disable all threshold alarms. Other alarms are not affected.
• While in beep mode, a threshold of 0 will not trigger an audible
alarm even if Alarm is enabled.
• Concentration display is unavailable in Beep mode.
The Channel Configuration screen has restrictions that must be
noted when Differential mode () is selected.
When differential Δ particle count or concentration () is
selected, the total number of counts is the number of particles
between enabled bin sizes. When particle concentration is
cumulative (Σ), the total number of counts includes all particles
larger than the bin size.
In Differential Display/Alarm mode, there are two constraints:
• If alarming is desired, all channels must be enabled.
• If channel selection is desired, then all alarms must
be disabled.
The controls work in a mutually exclusive manner. When any of the
channel “Enable” boxes are unchecked, all “Alarm” enable boxes
will be cleared. When any of the “Alarm” boxes are checked, all of
the channel “Enable” boxes will become checked.
For the Cumulative modes (), there are no such constraints. Any
combination of “Enable” and “Alarm” selections can be made.
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