TSI Instruments 3082, Operation And Service Manual

Page: 171 / 225

Maintenance, Service, and Troubleshooting 6-29
Problem Cause Suggested Action
Instrument fails zero count
test when HV is set to
maximum (±10000V). Dacron screen is contaminated,
wet, or burned out. Replace the Dacron screen (see Cleaning/Changing the
DMA Dacron Screen ).
Cannot find x-axis and y-
axis settings menus There are no buttons to enter x-
axis and y-axis settings menus.
Need to click on axes. On SMPS screen, click on x-axis or y-axis to get options
for changing density, view resolution, units, weights,
and scaling
Cannot figure out how to
change particle density
Retrace time is shown as
>5s Aerosol flow rate read from
impactor is <0.1 l/min. Indicates either low flow rate exiting DMA or improper
impactor installation. Check that impactor has impaction
plate installed.
USB device not recognized
by the 3082 USB drive is formatted as NTFS The 3082 can handle USB devices formatted as FAT,
FAT32, or exFAT. Reformat your USB device to use
one of these file formats.
USB device has a storage
capacity >250 GB Devices with large memory capacities may require up to
2 minutes to be recognized.
Mismatch between inverted
logged data and Aerosol
Instrument Manager
software when looking at
the same data set. Rounding errors in inversion
algorithm. An inverted data mismatch between Aerosol Instrument
Manager software and the 3082 can occur since the raw
data is being processed by two separate inversion
algorithms. Mismatches larger than 0.5% can be
encountered if the multiple charge correction is enabled,
due to mismatch in rounding. The mismatch will not
affect overall scan statistics (i.e., concentration, mean
diameter, etc.) by more than 0.5%.
This mismatch does not exist in the raw data or in scan
properties required to do the data inversion (i.e. mean
free path, gas viscosity, etc.).
Lowest channels return
zero even though CPC is
counting particles CPC efficiency for that channel is
<20%. Default efficiency files in the 3082 ignore contribution of
particles in channels for which CPC efficiency is less
than 20 percent. If you wish to consider this data, you
must know the efficiency at which the CPC is counting
in order to obtain an accurate size distribution. If you do,
import data into the Aerosol Instrument Manager
software and apply your own efficiency correction by
modifying the .EFF file of the CPC.
0 to 3 percent mismatch
between particle diameter
displayed by 3082 and
3080 Differences in values used for
slip correction, mean free path,
and gas viscosity. More accurate values are being used by the 3082
Electrostatic Classifier for determining particle size. The
difference can be as high as three percent. Note that
the 3082 uses the same values currently used by AIM.
Data Logging Error Internal SD card not recognized
during data logging Internal SD card corrupted, or loose, missing. Try
rebooting to re-initialize SD card connection. If problem
persists, contact TSI technical support.
External flash drive disconnected
before sample completed Do not remove flash drive while sampling is in progress.
Error is encountered when
setting Start At Time
(delayed start) between
12 AM and 12:59 AM When in 12-hour format, Aerosol
Instrument Manager software
does not allow sample times to
be entered between 12:00 AM
and 12:59 AM. Close Aerosol Instrument Manager software. Change
PC clock to 24-hour format. Aerosol Instrument
Manager software dialog will change to 24-hour format
and will allow entries between 00:00 and 00:59.