Thermo Scientific 42i Instruction Manual page 15

Chapter 8
Thermo Fisher Scientific
Analog Output Calibration ............................................................... 7-32
Analog Input Calibration .................................................................. 7-33
Calibrating the Input Channels to Zero Volts ................................ 7-33
Calibrating the Input Channels to Full-Scale ................................. 7-34
Pressure Transducer Assembly Replacement...................................... 7-35
Pressure Transducer Calibration........................................................ 7-36
Temperature Control Board Replacement......................................... 7-38
Ambient Temperature Calibration .................................................... 7-39
Fuse Replacement ............................................................................. 7-40
Scrubber Replacement....................................................................... 7-40
I/O Expansion Board (Optional) Replacement ................................. 7-41
Digital Output Board Replacement................................................... 7-43
Motherboard Replacement................................................................ 7-43
Measurement Interface Board Replacement ...................................... 7-44
Flow Transducer Replacement .......................................................... 7-45
Flow Transducer Calibration............................................................. 7-46
Front Panel Board Replacement........................................................ 7-48
LCD Module Replacement ............................................................... 7-49
Service Locations............................................................................... 7-50
System Description .......................................................................................... 8-1
Hardware ............................................................................................ 8-1
NO -to-NO Converter ....................................................................... 8-2
2
Mode Solenoid................................................................................. 8-2
Reaction Chamber ........................................................................... 8-2
Optical Filter.................................................................................... 8-3
Pressure Transducer ......................................................................... 8-3
Sample Flow Sensor ......................................................................... 8-3
Ozonator............................................................................................. 8-3
Ozonator Flow Switch ..................................................................... 8-3
Photomultiplier Tube ......................................................................... 8-3
Photomultiplier Tube Cooler .............................................................. 8-3
External Pump .................................................................................... 8-3
Sample Capillary .............................................................................. 8-3
Dry Air Capillary ............................................................................. 8-4
Software .............................................................................................. 8-4
Instrument Control.......................................................................... 8-4
Monitoring Signals........................................................................... 8-4
Measurement Calculations ............................................................... 8-5
Output Communication .................................................................. 8-5
Electronics .......................................................................................... 8-6
Motherboard.................................................................................... 8-6
External Connectors...................................................................... 8-6
Internal Connectors ...................................................................... 8-6
Measurement Interface Board .......................................................... 8-7
Measurement Interface Board Connectors..................................... 8-7
Model 42i Trace Level Instruction Manual
Contents
xi