6-28
Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
problem may be that this value will not be stable over time so even if it is
reset to zero, it may drift over time.
Note
: When the Data Type is changed from Concentration to Electrometer
Current (and back), a command is sent to the instrument by the
software to change this mode. The command takes approximately 5
seconds to complete. You may see the message shown in
Figure 6-28.
Figure 6-28
Changing Data Export Modes Dialog Box
The next step is to clean the column as indicated in the sections above.
Figure 6-29
Software Showing Raw Electrometer Noisy Channel