TSI Instruments SIZER 3321, User Manual

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x Model 3321 Aerodynamic Particle Sizer
®
Spectrometer
CHAPTER 5 Theory of Operation ........................................................ 5-1
Sample Flow Path ............................................................................. 5-1
Optics Path ....................................................................................... 5-3
Signal Processing Path ..................................................................... 5-5
APD Module .................................................................................. 5-5
Analog Module ............................................................................... 5-6
Digital Module ................................................................................ 5-7
Particle Coincidence ......................................................................... 5-9
CHAPTER 6 Contacting Customer Service ........................................ 6-1
Technical Contacts ........................................................................... 6-1
Returning the APS Spectrometer for Service ................................... 6-2
APPENDIX A Maintenance ................................................................... A-1
Maintenance Schedule ..................................................................... A-1
Cleaning the Inner Nozzle ................................................................ A-2
Cleaning the Outer Nozzle ................................................................ A-3
Replacing the Filters ......................................................................... A-6
Replacing the EPROM ...................................................................... A-7
Calibrating the APS
TM
Spectrometer ................................................ A-9
APPENDIX B Troubleshooting ............................................................. B-1
APPENDIX C Using Serial Data Commands ....................................... C-1
Pin Connectors ................................................................................. C-1
Baud Rate ......................................................................................... C-2
Parity (7-Bits Even) ........................................................................... C-2
Stop Bits and Flow Control ............................................................... C-2
Commands........................................................................................ C-3
Set Commands ................................................................................. C-5
Action Commands .......................................................................... C-13
Read Commands (Polled) .............................................................. C-16
Unpolled Commands ...................................................................... C-20
Unpolled Record Formats ............................................................... C-23
How to Input Commands and Troubleshoot the Results ................ C-27
Input Guidelines ........................................................................... C-27
Troubleshooting Input .................................................................. C-28
APPENDIX D Model 3321 Specifications ............................................ D-1
Reader’s Comments
F i g u r e s
1 Location of Warning and Information Labels .................................... vi
1-1 Model 3321 Aerodynamic Particle Sizer
®
Spectrometer ................. 1-2
1-2 Double-Crested Signal From Particles Passing Through
Overlapping Beams ......................................................................... 1-3
2-1 Remove the Rubber Feet on the Base Plate to Mount the
Model 3321 on Another Surface ..................................................... 2-2
2-2 Install the Sensor on a Clean, Hard Surface and Provide
Adequate Clearance for Ventilation ................................................ 2-3