Contents xi
2-3 Serial Port Connector on the Back of the Model 3321 .................... 2-4
2-4 I/O Port of the Model 3321 APS™ Spectrometer ........................... 2-5
3-1 Front Panel of the Model 3321 APS™ Spectrometer ..................... 3-2
3-2 Model 3321 Menu Layout ................................................................ 3-3
3-3 Back Panel of the Model 3321 APS™ Spectrometer ...................... 3-5
3-4 24V DC Power Input Pin Designations ........................................... 3-6
3-5 I/O Port Pin Designations ................................................................ 3-7
3-6 Internal Diagram of the Model 3321 APS™ Spectrometer ............. 3-9
4-1 APS™ Spectrometer Menu ............................................................. 4-2
5-1 Aerosol Flow Through the Model 3321 APS™ Spectrometer ......... 5-2
5-2 APS™ Spectrometer Optics Cross Section .................................... 5-4
5-3 Typical Example of a Double Crested Signal .................................. 5-5
A-1 Location of EPROM Chips on APS™ Spectrometer Digital
PC-Board ........................................................................................ A-8
C-1 SERIAL PORT Pin Designations ................................................... C-1
C-2 Serial Command Tables ................................................................. C-4
Table s
3-1 Power Connections for 24V DC Power Input .................................. 3-6
3-2 Signal Levels for I/O Port Configurations ........................................ 3-7
4-1 Description of Menu Items ............................................................... 4-3
A-1 Maintenance Schedule ................................................................... A-1
B-1 Troubleshooting Symptoms and Recommendations ..................... B-1
C-1 Signal Connections for RS-232 Configurations .............................. C-2
C-2 Digital Output Pin Settings ............................................................. C-8
C-3 Analog Voltage Output Settings ................................................... C-10
C-4 Troubleshooting Serial Commands .............................................. C-28
D-1 Specifications of the Model 3321 Aerodyamic Particle Sizer
®
(APS™) Spectrometer .................................................................... D-1
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