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Thermo 48i User Manual
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Model 48
i
Instruction Manual
Gas Filter Correl
ation CO Analyzer
Part number 101891-00
8Apr2005
2
Table of Contents
Default Chapter
3
Table of Contents
3
Chapter 1 Introduction
13
Principle of Operation
14
Specifications
15
Chapter 2 Installation
17
Lifting
17
Unpacking and Inspection
17
Setup Procedure
19
Startup
21
Chapter 3 Operation
23
Display
24
Pushbuttons
25
Soft Keys
26
Software Overview
26
Power-Up Screen
28
Run Screen
28
Main Menu
29
Range Menu
30
Single Range Mode
31
Dual Range Mode
32
Autorange Mode
33
Gas Units
36
CO Range
37
Set Custom Ranges
39
Averaging Time
40
Calibration Factors Menu
41
CO Background Correction
42
CO Span Coefficients
43
Calibration Menu
44
Calibrate CO Background
45
Calibrate CO Coefficient
46
Zero/Span Check Menu
47
Instrument Controls Menu
51
Datalogging Settings
52
Communication Settings
63
I/O Configuration
75
Temperature Compensation
93
Pressure Compensation
94
Screen Contrast
95
Service Mode
96
Date/Time
96
Diagnostics Menu
97
Program Version
98
Voltages
99
Temperatures
101
Pressure
102
Flow
102
Sample/Reference Ratio
103
AGC Intensity
103
Motor Speed
104
Analog Input Readings
104
Analog Input Voltages
105
Digital Inputs
106
Relay States
106
Test Analog Outputs
107
Instrument Configuration
108
Contact Information
109
Alarms Menu
109
Internal Temperature
110
Bench Temperature
112
Pressure
113
Sample Flow
115
Bias Voltage
116
AGC Instensity
117
Motor Speed
119
Zero and Span Check
119
Zero and Span Auto Calibration
121
Concentration
121
Service Menu
123
Single/Dual/Auto Select
124
Pressure Calibration
125
Flow Calibration
128
Initial S/R Ratio
131
Multi-Point Calibration
132
Preamp Board Calibration
135
Temperature Calibration
136
Analog Output Calibration
136
Analog Input Calibration
139
Display Pixel Test
142
Restore User Defaults
143
Password
143
Lock Instrument
144
Change Password
144
Remove Password
145
Enter Password
146
Chapter 4 Calibration
147
Equipment Required
147
CO Concentration Standard
147
Zero Air Generator
147
Flow Meter(S) and Controller(S)
148
Pressure Regulator for CO Standard Cylinder
149
Mixing Chamber
149
Output Manifold
149
Pre-Calibration
149
Calibration
149
Connect the Instrument
149
Zero Adjust
150
Span Adjust
151
Additional Concentration Standards
152
Calibration Curve
152
Calibration Frequency
152
Periodic Zero and Span Checks
152
References
153
HI and lo Multi-Point Calibration
153
Default Coefficients
154
Cal Point 1, 2, and 3 Adjust
154
Replacement Parts
157
Chapter 5 Preventive Maintenance
158
Cleaning the Outside Case
158
Cleaning the Optics
158
IR Source Replacement
159
Fan Filter Inspection and Cleaning
159
Leak Test and Pump Check out
160
External Leaks
160
Leaks Across the Optional Zero/Span and Sample Solenoid Valves
160
Pump Rebuilding
161
Chapter 6 Troubleshooting
163
Safety Precautions
163
Troubleshooting Guides
163
Board-Level Connection Diagrams
168
Connector Pin Descriptions
169
Service Locations
182
Chapter 7 Servicing
183
Safety Precautions
185
Firmware Updates
185
Replacement Parts List
186
Cable List
187
Lowering the Partition Panel
189
Fuse Replacement
190
Fan Replacement
191
IR Source Replacement
192
Filter Wheel Replacement
193
Chopper Motor Replacement
195
Optical Bench Replacement
196
Optical Switch Replacement
197
Bench Heater Assembly Replacement
198
Detector/Preamplifier Assembly Replacement
199
Pump Replacement
200
Pressure Transducer Replacement
202
Pressure Transducer Calibration
203
Flow Transducer Replacement
205
Flow Transducer Calibration
206
Capillary Cleaning or Replacement
207
Optional Zero/Span and Sample Solenoid Valve Replacement
208
Analog Output Testing
209
Analog Output Adjustment
211
Ambient Temperature Calibration
212
I/O Expansion Board (Optional) Replacement
213
Digital Output Board Replacement
215
Motherboard Replacement
216
Measurement Interface Board Replacement
217
Front Panel Board Replacement
218
LCD Module Replacement
219
Service Locations
221
Chapter 8 System Description
224
Hardware
224
Optical Bench
225
Band-Pass Filter
225
Bench Heater Board
225
Chopper Motor
225
Optical Pickup
226
Gas Filter Wheel
226
Infrared Source
226
Pre-Amplifier Assembly with IR Detector
226
Sample Flow Sensor
226
Pressure Transducer
226
Capillary
226
Pump
226
Purge Flow Switch (Optional)
226
Software
227
Instrument Control
227
Monitoring Signals
227
Output Communication
227
Electronics
229
Motherboard
229
Measurement Interface Board
230
Flow Sensor Assembly
230
Pressure Sensor Assembly
230
Bench Heater Board
231
Pre-Amp Board Assembly
231
Digital Output Board
231
I/O Expansion Board (Optional)
231
Front Panel Connector Board
231
I/O Components
232
Analog Voltage Outputs
232
Analog Current Outputs (Optional)
232
Analog Voltage Inputs (Optional)
233
Digital Relay Outputs
233
Digital Inputs
233
Serial Ports
233
RS-232 Connection
234
Ethernet Connection
235
External Accessory Connector
235
Chapter 9 Optional Equipment
237
Internal Zero/Span Assembly
237
Internal Zero Air Scrubber
237
Filter Wheel Purge
238
Calibration Note
238
Teflon Particulate Filter
239
I/O Expansion Board Assembly
239
Terminal Block and Cable Kits
239
Mounting Options
240
Appendix A Warranty
245
Appendix B C-Link Protocol Commands
247
Instrument Identification Number
248
Commands
248
Measurements
254
Alarms
257
Diagnostics
261
Datalogging
262
Calibration
268
Keys/Display
271
Measurement Configuration
273
Hardware Configuration
276
Communications Configuration
278
I/O Configuration
282
Record Layout Definition
286
Format Specifier for ASCII Responses
287
Format Specifier for Binary Responses
287
Format Specifier for Front-Panel Layout
287
Appendix C MODBUS Protocol
293
Serial Communication Parameters
294
TCP Communication Parameters
294
Application Data Unit Definition
294
Function Codes
295
MODBUS Commands Supported
300
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Thermo 48i Specifications
General
Linearity
±1% of full scale
Accuracy
±1% of full scale
Resolution
0.1
Display
LCD with backlight
Precision
±0.5% of full scale
Storage Temperature
-20°C to 60°C
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