Thermo 42i - Page 7

Contents
Thermo Electron Corporation Model 42i Low Source Instruction Manual vii
Service Menu ........................................................................3-82
PMT Voltage Adjustment..................................................3-83
Range Mode Select.............................................................3-83
Converter Set Temperature................................................3-84
Pressure Calibration ...........................................................3-84
Input Board Calibration.....................................................3-87
Temperature Calibration....................................................3-89
Analog Output Calibration ................................................3-90
Analog Input Calibration ...................................................3-92
Ozonator Safety .................................................................3-94
Extended Ranges................................................................3-94
Dilution Ratio....................................................................3-95
Display Pixel Test ..............................................................3-95
Restore User Defaults.........................................................3-96
Password ...............................................................................3-97
Set Password ......................................................................3-97
Lock Instrument ................................................................3-98
Change Password ...............................................................3-98
Remove Password...............................................................3-99
Unlock Instrument ............................................................3-99
Chapter 4 Calibration........................................................................................4-1
Equipment Required...............................................................4-1
Pre-Calibration .......................................................................4-1
Calibration..............................................................................4-2
Connecting the GPT Apparatus...........................................4-3
Dynamic Parameter Specifications for Gas Phase Titrator....4-4
Adjusting Instrument Gain ..................................................4-6
Preparing NO, NO
x
, and NO
2
Calibration Curves .............4-9
Calibration in Dual Range and Auto Range Mode................4-12
Calibrate Low NO .............................................................4-13
Calibrate Low NO
x
............................................................4-13
Calibrate Low NO
2
............................................................4-14
Calibrate High NO............................................................4-15
Calibrate High NO
x
..........................................................4-15
Calibrate High NO
2
..........................................................4-16
Zero and Span Check............................................................4-16
Chapter 5 Preventive Maintenance ...............................................................5-1
Safety Precautions ...................................................................5-1
Replacement Parts...................................................................5-2
Cleaning the Outside Case......................................................5-2
Ozonator Air Feed Drying Column Replacement ...................5-2
Capillaries Inspection and Replacement ..................................5-2