TSI Instruments 3772 - Page 13

Contents xiii
USB Status .................................................................................... 4-10
Firmware Version ........................................................................... 4-11
Using the Flash Memory Card (3772 only) ....................................... 4-11
Aerosol Instrument Manager
®
Software ............................................ 4-13
Moving and Shipping the CPC .......................................................... 4-13
CHAPTER 5 Technical Description ........................................................ 5-1
Theory ................................................................................................. 5-1
History ................................................................................................. 5-2
Adiabatic Expansion CNC ............................................................... 5-2
Two-Flow Mixing CNC ..................................................................... 5-3
Diffusional Thermal CNC ................................................................. 5-3
Design of the CPC .............................................................................. 5-5
Sensor .............................................................................................. 5-5
Critical Flow ..................................................................................... 5-7
Counting Efficiency and Response Time of the 3772/3771 CPC ....... 5-8
CHAPTER 6 Particle Counting ............................................................... 6-1
Optical Detection ................................................................................. 6-1
Total Count Accuracy .......................................................................... 6-2
Live-Time Counting ............................................................................. 6-2
Coincidence Correction for Pulse Output ........................................ 6-3
Particle Size Selector .......................................................................... 6-4
CHAPTER 7 Computer Interface and Commands ................................ 7-1
Computer Interface ............................................................................. 7-1
USB .................................................................................................. 7-1
Ethernet ........................................................................................... 7-1
Flash Memory Card Specification (3772 only) ................................. 7-5
RS-232 Serial Communications ...................................................... 7-6
Commands .......................................................................................... 7-7
CHAPTER 8 Maintenance and Service .................................................. 8-1
Replacement Parts Kits ...................................................................... 8-2
Draining Butanol from the Butanol Reservoir ..................................... 8-4
Changing the Filters ............................................................................ 8-5
Butanol Fill and Drain Filters ............................................................ 8-5
Micro Pump Filter ............................................................................. 8-6
Removing and Installing the Saturator Wick ....................................... 8-7
Verifying Flow Rate ........................................................................... 8-10
Calibration ......................................................................................... 8-10
Correcting Flooded Optics ................................................................ 8-11
Viewing Analog Pulses ..................................................................... 8-12
Calibration Reminder ........................................................................ 8-14
False Count Check ........................................................................... 8-14
Error Messages and Troubleshooting ............................................... 8-15
Technical Contacts ........................................................................... 8-17
Returning the CPC for Service .......................................................... 8-18
APPENDIX A Specifications .................................................................. A-1
APPENDIX B Firmware Commands ...................................................... B-1
READ Commands .............................................................................. B-1
SET Commands ................................................................................. B-5
MISC (MISCELLANEOUS) Commands ............................................ B-8
HELP Commands .............................................................................. B-9