Contents Teledyne API Ultrafine Particle Monitor - Model 651
x 07506C DCN6727
Front Panel .......................................................................................... 35
Display.............................................................................................. 35
Status Messages .............................................................................. 36
Indicator Light ................................................................................... 36
Back Panel........................................................................................... 37
Internal Instrument Components ......................................................... 38
Optics Module................................................................................... 38
Vacuum Supply ................................................................................ 38
Water System ................................................................................... 39
Fans.................................................................................................. 39
Circuit Boards ................................................................................... 39
Internal Clock.................................................................................... 39
Data Communication Ports .............................................................. 40
CHAPTER 5.........................................................................................................43
Instrument Operation..........................................................................................43
Operating Precautions ......................................................................... 43
Recommended Operation Procedures ................................................ 43
Outdoor Operation Procedures ........................................................ 43
Standard Operation Procedures....................................................... 44
Warm-up .............................................................................................. 45
Display/User Settings .......................................................................... 45
HOME Screen .................................................................................. 45
STATUS Screens ............................................................................. 45
SETUP Screens ............................................................................... 47
TOTAL Screen.................................................................................. 51
CHAPTER 6.........................................................................................................53
Technical Description..........................................................................................53
Theory.................................................................................................. 53
Design of the Model 651...................................................................... 54
Sensor .............................................................................................. 54
Flow System ..................................................................................... 56
Critical Flow ...................................................................................... 56
Temperature Control ........................................................................ 57
Vacuum Supply ................................................................................ 57
Inlet Pressure Measurement ............................................................ 57
Water Removal System.................................................................... 58
Counting Efficiency and Response Time of the Model 651................. 58
CHAPTER 7.........................................................................................................61
Particle Counting.................................................................................................61
Total Count Accuracy ..........................................................................61
Live-Time Counting.............................................................................. 62
Concentration Measurement ............................................................... 63
Totalizer Mode ..................................................................................... 65
CHAPTER 8.........................................................................................................67
Computer Interface, Commands, and Data Collection....................................67
Computer Interface .............................................................................. 67