Thermo Scientific 42i Instruction Manual page 17

Chapter 8
Thermo Fisher Scientific
Firmware Updates ............................................................................... 7-4
Accessing the Service Mode ................................................................. 7-4
Replacement Parts List ........................................................................ 7-4
Cable List ............................................................................................ 7-6
External Device Connection Components .......................................... 7-6
Removing the Measurement Bench and Lowering the Partition Panel 7-8
Pump Replacement ............................................................................. 7-9
Fan/Filter Replacement ..................................................................... 7-10
PMT Cooler and Reaction Chamber Assembly Replacement ............ 7-11
Photomultiplier Tube Replacement .................................................. 7-13
PMT High Voltage Power Supply Replacement ................................ 7-14
PMT Voltage Adjustment ................................................................. 7-16
Reaction Chamber Cleaning or Removal .......................................... 7-17
NO -to-NO Converter Replacement ................................................ 7-18
2
Solenoid Valve Replacement ............................................................. 7-20
Ozonator Assembly Replacement ...................................................... 7-21
Ozonator Transformer Replacement ................................................. 7-23
Input Board Replacement ................................................................. 7-23
Input Board Calibration .................................................................... 7-25
DC Power Supply Replacement ........................................................ 7-25
Analog Output Testing ..................................................................... 7-26
Analog Output Calibration ............................................................... 7-29
Analog Input Calibration .................................................................. 7-30
Calibrating the Input Channels to Zero Volts ................................ 7-30
Calibrating the Input Channels to Full-Scale ................................. 7-30
Pressure Transducer Assembly Replacement ...................................... 7-31
Pressure Transducer Calibration ........................................................ 7-32
Temperature Control Board Replacement ......................................... 7-34
Ambient Temperature Calibration .................................................... 7-35
Fuse Replacement ............................................................................. 7-36
Scrubber Replacement ....................................................................... 7-36
I/O Expansion Board (Optional) Replacement ................................. 7-37
Digital Output Board Replacement ................................................... 7-39
Motherboard Replacement ................................................................ 7-39
Measurement Interface Board Replacement ...................................... 7-40
Flow Transducer Replacement .......................................................... 7-41
Flow Transducer Calibration ............................................................. 7-42
Front Panel Board Replacement ........................................................ 7-44
LCD Module Replacement ............................................................... 7-45
Service Locations ............................................................................... 7-46
System Description .......................................................................................... 8-1
Hardware ............................................................................................ 8-1
NO -to-NO Converter ....................................................................... 8-2
2
Mode Solenoid ................................................................................. 8-2
Reaction Chamber .............................................................................. 8-2
Contents
Model 42i Instruction Manual xi