Thermo Scientific 48i Instruction Manual page 16

Contents
Chapter 5
Chapter 6
Chapter 7
x Model 48i Instruction Manual
Zero Air Generator ........................................................................... 4-1
Compression ................................................................................. 4-2
Drying .......................................................................................... 4-2
Scrubbing ...................................................................................... 4-2
Flow Meter(s) and Controller(s) ....................................................... 4-2
Pressure Regulator for CO Standard Cylinder .................................. 4-2
Mixing Chamber .............................................................................. 4-3
Output Manifold ............................................................................. 4-3
Pre-Calibration ................................................................................... 4-3
Calibration .......................................................................................... 4-3
Connect the Instrument ................................................................... 4-3
Zero Adjust ...................................................................................... 4-4
Span Adjust ...................................................................................... 4-5
Calibration Frequency ...................................................................... 4-6
Periodic Zero and Span Checks ........................................................... 4-6
HI and LO Multi-Point Calibration ................................................... 4-7
Default Coefficients ......................................................................... 4-7
Cal Point 1, 2, and 3 Adjust ............................................................. 4-7
References ........................................................................................... 4-9
Preventive Maintenance ................................................................................. 5-1
Safety Precautions ............................................................................... 5-1
Replacement Parts ............................................................................... 5-2
Cleaning the Outside Case .................................................................. 5-2
Cleaning the Optics ............................................................................ 5-2
IR Source Replacement ....................................................................... 5-3
Fan Filter Inspection and Cleaning ..................................................... 5-3
Leak Test and Pump Check Out ......................................................... 5-4
External Leaks .................................................................................. 5-4
Leaks Across the Optional Zero/Span and Sample Solenoid Valves .. 5-5
Pump Rebuilding ................................................................................ 5-5
Disassembly .................................................................................. 5-5
Assembly with New Diaphragm and Valve .................................... 5-8
Troubleshooting ................................................................................................. 6-1
Safety Precautions ............................................................................... 6-1
Troubleshooting Guides ...................................................................... 6-1
Board-Level Connection Diagrams ..................................................... 6-5
Connector Pin Descriptions ................................................................ 6-7
Service Locations ............................................................................... 6-20
Servicing ............................................................................................................. 7-1
Safety Precautions ............................................................................... 7-3
Firmware Updates ............................................................................... 7-4
Accessing the Service Mode ................................................................. 7-4
Thermo Fisher Scientific