Thermo 42i - Page 11

Figures
Thermo Electron Corporation Model 42i Low Source Instruction Manual xi
Figures
Model 42i Low Source Flow Schematic ...................................1-3
Remove the Packing Material ..................................................2-2
Remove the Shipping Screws ...................................................2-2
Model 42i Low Source Rear Panel ...........................................2-4
Atmospheric Dump Bypass Plumbing .....................................2-4
42i Low Source Front Panel Display .......................................3-2
Front Panel Pushbuttons .........................................................3-3
Flowchart of Menu-Driven Software .......................................3-5
Pin-Out of Rear Panel Connector in Single Range Mode ........3-9
Pin-Out of Rear Panel Connector in Dual Range Mode ........3-10
Analog Output in Auto Range Mode ....................................3-12
Pin-Out of Rear Panel Connector in Auto Range Mode ........3-13
GPT System ............................................................................4-4
Inspecting and Replacing the Capillaries .................................5-3
Rebuilding the Pump ..............................................................5-6
Board-Level Connection Diagram - Common Electronics .......6-6
Board-Level Connection Diagram - Measurement System ......6-7
Properly Grounded Antistatic Wrist Strap ...............................7-4
Component Layout .................................................................7-7
Remove the Measurement Bench Screws .................................7-8
Slide Out the Measurement Bench ..........................................7-9
Lower the Partition Panel ......................................................7-10
Replacing the Pump ..............................................................7-12
Replacing a Fan .....................................................................7-13
PMT Cooler and Reaction Chamber .....................................7-14
Replacing the PMT ...............................................................7-16
Replacing the PMT HVPS ....................................................7-17
Cleaning or Removing the Reaction Chamber ......................7-20
NO
2
-to-NO Moly Converter Assembly ................................7-22
Replacing the Solenoid Valve ................................................7-24
Replacing the Ozonator Assembly .........................................7-25
Replacing the Input Board ....................................................7-27
Replacing the DC Power Supply ...........................................7-30
Rear Panel Analog Voltage Output Pins ................................7-31
Replacing the Pressure Transducer ........................................7-34
Replacing the Scrubber ..........................................................7-40
Replacing the I/O Expansion Board (Optional) ....................7-41
Rear Panel Board Connectors ................................................7-41
Replacing the Measurement Interface Board .........................7-44
Replacing the Front Panel Board and the LCD Module ........7-45
Hardware Components ...........................................................8-2
Flow Diagram, Zero/Span Option ..........................................9-2