TSI Instruments DustTrak 8520, Operation And Service Manual

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Chapter 5
Troubleshooting
The table below lists the symptoms, possible causes, and recommended
solutions for common problems encountered with the D
UST
T
RAK
monitor.
Symptom Possible Cause Corrective Action
Erratic zero
reading. Leak.
Dirty inlet port and/or
sample tube.
Sample nozzle missing.
Internal filter(s) not
installed properly
(leaking).
Check connections for leaks.
Replace zero filter.
Tighten inlet cap.
Clean inlet port. Clean or
replace tubing.
Remove inlet port cap and
check sample nozzle. Replace
if missing.
Inspect internal filter wells to
make certain the filters and o-
rings are seated properly.
Replace internal filters if
necessary.
No display. Unit not switched on.
Low or dead batteries.
Batteries installed
backwards.
Dirty battery contacts.
Switch unit on.
Replace the batteries or plug in
the AC adapter.
Observe polarity indication on
battery holder diagram.
Clean the battery contacts.
No keypad
response. Display/Lockout switch
in lockout position. Slide lockout switch to normal
position (to the right).
Incorrect
function
displayed. Two keys have been
pressed at the same time. Press only one key at a time.