TSI Instruments AEROTRAK 7201-A2F - Page 36

4–6 AeroTrak™ Remote Airborne Particle Counters
Indica t o r LEDs
The two LEDs on the front of the Remote Airborne Particle Counter
provide indication of the particle counter’s operation as described in the
table below.
Indicator
Status
Function
Power/Service
Off
Device is not powered
Green
Power is present and device is
functioning normally
Yellow
Device has a flow error (if equipped with
a flow sensor)
Red
Device has a laser or detector error
requiring service
Counting
Blue
Counting is enabled
Off
Counting is disabled