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48C
Thermo Electron 48C User Manual
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MODEL 48C
GA
S FILTER CORRELA
TIO
N CO A
NALYZER
INSTRUCTIO
N MANUA
L
P/N 42P255
THERMO ELECTRON CORPORA
TION
ENVIRONMENTA
L INSTR
UMENTS
27 FORGE PA
RKWA
Y FRA
N
KLIN MA
SSA
CHUSETTS 02038
(866) 282-0430 Toll Free
(508) 520-0430 Int
ernational
(508) 520-1460 Fax
www.t
h
er
mo
.
co
m/
ei
d
3Mar2004
The 220V option complies with 89/336/EEC directive for electromagnetic compatibility.
2
Table of Contents
Default Chapter
5
Table of Contents
5
Chapter 1 Introduction
15
Principle of Operation
15
Specifications
17
Chapter 2 Installation
19
Lifting
19
Unpacking
19
Setup Procedure
19
Analog Output Cover Installation
22
Startup
24
Chapter 3 Operation
25
Display
25
Pushbuttons
25
Run Pushbutton
25
Menu Pushbutton
26
Enter Pushbutton
26
Help Pushbutton
26
Pushbuttons
26
Software Overview
26
Power-Up Screen
28
Self Test Screen
28
Run Screen
29
Main Menu
29
Range Menu
30
Single Range Mode
31
Dual Range Mode
31
Autorange Mode
32
Gas Units
34
CO Range
35
Custom Ranges Menu
37
Custom Range Screen
38
Averaging Time
39
Calibration Factors Menu
40
CO Background Correction
41
CO Background
42
CO Span Gas
43
CO Span Coefficient
44
Calibration Menu
45
Calibrate Zero
46
Instrument Controls Menu
48
Temperature Correction
49
Pressure Correction
50
Baud Rate
51
Instrument ID
52
Screen Brightness
53
Service Mode
54
Time
55
Date
56
Diagnostics Menu
57
Program Number
58
Voltages
59
Temperatures
60
Pressure
61
Flow
62
Sample/Reference Ratio
63
AGC Intensity
64
Motor Speed
65
Test Analog Outputs
66
Zero
67
Fullscale
68
Ramp
69
Option Switches
70
Alarms
71
Internal Temperature
72
Min and Max Internal Temperature Limits
73
Chamber Temperature
74
Min and Max Chamber Temperature Limits
75
Pressure
76
Min and Max Pressure Limits
77
Flow
78
Min and Max Flow Limits
79
Bias Voltage
80
Min and Max Bias Voltage Limits
81
AGC Intensity
82
Min and Max AGC Intensity Limits
83
Motor Speed
84
CO Concentration
85
Service Mode Menu
87
Pressure
88
Flow
89
Intensity Check
90
A/D Frequency
91
Temperature Compensation Coefficient
93
Initial S/R Ratio
94
Hi or lo Multi-Point Calibration
95
Relay Logic
98
Set Test Display
99
Internal Option Switches
100
Remote
101
Zero/Span and Sample Solenoid Valves
101
Double Range and Autorange
102
Lock
102
Spares
102
Chapter 4 Calibration
103
Equipment Required
103
CO Concentration Standard
103
Zero Air Generator
103
Flow Meter(S) and Controller(S)
104
Pressure Regulator for CO Standard Cylinder
105
Mixing Chamber
105
Output Manifold
105
Pre-Calibration
105
Calibration
105
Connect Instrument
105
Zero Adjust
106
Span Adjust
106
Additional Concentration Standards
108
Calibration Curve
108
Frequency of Calibration
108
Periodic Zero and Span Checks
108
References
109
Hi and lo Multi-Point Calibration
110
Default Coefficients
110
Cal Point 1, 2, and 3 Adjust
110
Chapter 5 Preventive Maintenance
113
Spare Parts
113
Cleaning the Optics
113
IR Source Replacement
114
System Leaks and Pump Check out
114
External Leaks
115
Chapter 6 Troubleshooting
117
Troubleshooting Guide
117
Chapter 7 Servicing
121
Safety Precautions
121
Replacement Parts List
122
IR Source Replacement
124
Correlation Wheel Replacement
124
Chopper Motor Replacement
126
Optical Bench Replacement
126
Optical Switch Replacement
127
Bench Heater and Bench Heater Power Supply Replacement
127
Preamplifier/Detector Assembly Replacement
128
Pump Rebuilding
128
Pump Replacement
129
Pressure Transducer Replacement
130
Flow Sensor Replacement
130
Input Signal Conditioning Board Replacement
131
DC and Bias Power Supply Boards Replacement
131
Capillary Removal
132
Optional Zero/Span and Sample Solenoid Valve Replacement
132
Analog Output Adjustment
132
Pressure Transducer Adjustment
134
Temperature Sensor Adjustment
135
Fuse Replacement
136
Chapter 8 Theory of Operation
139
Electronics
139
DC Power Supply
139
Bias Power Supply
139
Detector and Preamplifier
140
Input Signal Conditioning Board
140
Temperature Control Board
141
The Microprocessor System
141
Display Module
141
Processor Board
141
Analog to Digital Board
141
Digital/Analog Board
141
C-Link Board
141
Software
142
Subassemblies
143
Optical Bench
143
Correlation Wheel and Chopper Motor
143
Infrared (IR) Source
143
Flow Components
144
Temperature and Pressure Transducer
144
Chapter 9 Optional Equipment
145
Rack Mounts with Slides
145
Internal Zero/Span and Sample Solenoid Valves
147
Zero/Span Check
147
Remote Activation of Zero/Span and Sample Valves
150
Input Pins
151
Instrument Status Outputs
152
4-20 Ma ISOLATED CURRENT OUTPUT
153
Teflon Particulate Filter
154
Purge Housing
154
Instrument Handle
156
Appendix Awarranty
157
Appendix B Rs-232 Commands
160
4
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Thermo Electron 48C Specifications
General
Brand
Thermo Electron
Model
48C
Category
Measuring Instruments
Language
English
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