TSI Instruments Aerotrak 9303 - Instrument does not meet zero count specification (<1 particle;5 min).; Battery does not charge; Low Battery Indicator; Software does not connect to unit

6-2 AeroTrak
®
Handheld Airborne Particle Counters
Symptom
Possible Cause
Corrective Action
Instrument does not
meet zero count
specification
(<1 particle/5 min).
HEPA filter is not
connected properly
and room air is leaking
into the HEPA filter
assembly.
Check that the HEPA
filter has been tightly
connected to the inlet.
Check that rubber O-ring
(black) on the inlet is
in place.
Residual particles
from previous samples
are shedding off
internal parts and into
the optics.
Purge instrument by
running the instrument for
10 to 15 minutes or
longer before attempting
zero count test.
The filter assembly or
inlet are dirty or
contaminated with
particles.
Clean the HEPA filter
fitting or run an extended
test to clean out particles.
An internal component
has been damaged
due to operation
outside of temperature
specifications or one
or more excessive
bumps or jolts, and
electronic noise is
inducing false counts.
Return to factory or
factory authorized service
centers for service.
A leak has developed
in the aerosol flow
path.
Return to factory or
factory authorized service
centers for service.
Internal optics have
become dirty.
Return to factory or
factory authorized service
centers for service.
Battery does not
charge
The battery may not
be installed or is
disconnected.
Check battery.
Low Battery Indicator
Low battery.
Recharge battery or
connect AC cord
Software does not
connect to unit
No connection or
power.
Check that USB is
connected to instrument
and instrument is
turned on.
Unit is running a
sample or in a sub
menu.
Stop sample and make
sure screen shows main
view.