TSI Incorporated 8525, Operation And Service Manual

Page: 56 / 67

Chapter 5
48
Symptom Possible Cause Corrective Action
Counts seem
too low
(below
expected
values).
Low on alcohol.
Particle count in area
really
is low.
Moisture buildup inside
alcohol cartridge.
Plugged sample tube.
Wrong sample tube: too
long, wrong material
(causing particle loss).
Pump problem causing
low (or no) flow.
Instrument is being
operated in wrong
environment: too hot, too
cold, too humid.
Inferior or contaminated
alcohol.
Unit needs calibration
and/or servicing.
Replenish alcohol in wick.
N/A
Change alcohol wick inside
alcohol cartridge.
Straighten tube; remove
obstruction.
Use factory supplied sample
tube only!
Listen for pump operation.
Check pump flow with
flowmeter: should be approx.
0.7 L/min. Operate in specified
environment only.
Change alcohol wick inside
alcohol cartridge. Use only
approved alcohol.
Return to factory for service.
Does not
turn on. Not pressing on/off switch
properly.
Batteries are dead.
AC adapter is not plugged
into unit. Press and hold on/off switch for
one second.
Replace batteries.
Connect AC adapter.
No keypad
response. Keypad defective. Return to factory for service.
“LO ALC”
message Alcohol wick is depleted.
Excess moisture
accumulation. Refill alcohol cartridge.
Remove wick, replace with
spare wick and allow wick to air
dry in a clean location.