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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