6-1
C H A P T E R 6
Troubleshooting
Instrument is being operated outside
temperature or relative humidity
specifications.
Operate instrument within
specifications.
Internal parts have been damaged
because instrument was stored at a
temperature greater than 122°F (50°C).
Return to factory or factory authorized
service centers for service.
Instrument has contamination on the
optics due to condensation or
excessive loading.
Return to factory or factory authorized
service centers for service.
Laser or pump control is damaged.
Return to factory or factory authorized
service centers for service.
Unit is due for calibration.
Return to factory or factory authorized
service centers for service.
Instrument does not turn on.
Battery is not charged.
AC cord is not plugged into unit.
Recharge battery or connect to
AC power.
Connect AC cord.
Instrument does not meet
zero count specification
(<1 particle/5 mins).
Particles are in the instrument chamber.
Run the instrument for one-half hour
with a filter and then recheck the
zero count.
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 before
attempting zero count test. If instrument
has heavier contamination, purge of
1 hour or longer may be needed.
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.
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