Campbell Scientific TGA200A TGA Series Trace Gas Analzyers - Page 13

Table of Contents

G-1.

Swagelok® insert

............................................................................

G-3

G-2.

Front and back Swagelok® ferrules

................................................

G-3

G-3.

Swagelok® plug

..............................................................................

G-4

G-4.

Swagelok® cap

...............................................................................

G-4

H-1.

TE-cooled laser assembly installed in a TGA 200A

.......................

H-1

H-2.

TGA input module

..........................................................................

H-2

H-3.

TGA output module

........................................................................

H-2

H-4.

Modules mounted into TGA200A electronics

................................

H-3

H-5.

Cryocooler feedthrough holes with grommets (above) and plugs

(below)

.........................................................................................

H-5

H-6.

Older style TGA input module shipped with TGA100s

..................

H-7

H-7.

Older style TGA output module shipped with TGA100s

................

H-7

H-8.

Older style two-piece detector holder and short cell

.......................

H-8

H-9.

Newer style combined detector holder/short cell (shown with

newer style cable)

........................................................................

H-9

I-1.

Special control cable

.........................................................................

I-1

I-2.

Location of first thermistor probe attachment

...................................

I-1

I-3.

Location of second thermistor probe attachment

..............................

I-2

I-4.

Thermistor cable wiring to analog inputs

..........................................

I-3

I-5.

Control cable connection

..................................................................

I-3

Tables

1-1.

Historical Summary of Campbell Scientific Trace Gas Analyzers

......

1

3-1.

Parts Included with the TGA200A

.......................................................

3

4-1.

Part Numbers for Available Gas Species Lasers

................................

11

4-2.

Available AC Mains Power Cords by Region

...................................

12

4-3.

Power Module Mounting Brackets

....................................................

12

4-4.

Sample Air Dryer Specifications

.......................................................

19

5-1.

Typical Measurement Noise

a

.............................................................

29

5-2.

Physical Specifications of TGA Variants

...........................................

29

7-1.

Appearance and Function of Line Lock Icons

...................................

57

7-2.

Suggested Naming for Gas Names Setting

........................................

59

7-3.

TGA Instruction

.................................................................................

92

7-4.

Descriptions of TGAStatus Values

....................................................

94

A-1.

Discontinued Cryogenic Lead-salt Lasers

.......................................

A-1

A-2.

TE-cooled Lasers

............................................................................

A-2

A-3.

Replacement Cables for TGA Dewars

............................................

A-2

A-4.

Suggested Reference Gas Concentrations

.......................................

A-5

C-1.

Example Laser Temperature Optimization Data

..............................

C-2

F-1.

Recommended Passband Settings

....................................................

F-4

F-2.

Processing Lags for EC filters

..........................................................

F-5

F-3.

Summary of TGA Update Times

.....................................................

F-5

F-4.

Sample Cell Residence Time as a Function of Sample Cell

Volume and TGA Model

..............................................................

F-6

G-1.

Available Plastic Tubing Sizes, Construction, and Usage

Guidelines

....................................................................................

G-2

G-2.

Dimensions and Part Numbers for Swagelok® Inserts

...................

G-3

G-3.

Dimensions and Part Numbers for Swagelok

®

Ferrules

..................

G-3

G-4.


®

Plugs

......................

G-4

G-5.


®

Caps

.......................

G-4

I-1.

Control Parameters for TGA Thermistors

..........................................

I-4

vii

Section	Page
Revision and Copyright Information	1
Limited Warranty	3
Assistance	4
Precautions	5
Table of Contents	7
1. Introduction	15
2. Cautionary Statements	16
3. Initial Inspection	17
4. Overview	17
4.1 System Components	20
4.1.1 Standard Components	21
4.1.1.1 TGA Power Module	21
4.1.1.2 TGA Accessory & Tool Kit	22
4.1.1.3 TGA Test Intake	22
4.1.1.4 TGA Leak Check Nozzle	22
4.1.1.5 TGA SDM Cable	23
4.1.1.6 Plastic Tubing	23
4.1.1.7 CAT5 Ethernet Crossover Cable	23
4.1.1.8 Serial Data Cable	24
4.1.1.9 TGA TEC Support Software and Operating System	24
4.1.2 Optional Components	25
4.1.2.1 Laser	25
4.1.2.2 AC Mains Power Cord	25
4.1.2.3 Power Module Mounting Brackets	26
4.1.3 Common Accessories	26
4.1.3.1 TGA Reference Gas Connection	26
4.1.3.2 TGA Insulated Enclosure Cover	27
4.1.4 Other Accessories	28
4.1.4.1 TGA Air Sample Intake	28
4.1.4.2 TGA Heated Intake Filter & Orifice	28
4.1.4.3 TGA High-Flow Filter Holder	28
4.1.4.4 Sample Vacuum Pump	29
4.1.4.5 Bypass Vacuum Pump	31
4.1.4.6 Sample Air Dryer	32
4.1.4.7 TGA Rotameter	35
4.1.5 Support Software	36
4.1.6 Replacement Parts	36
4.1.6.1 TGA Heated Intake Filter	36
4.1.6.2 Filter Element	36
4.1.6.3 TGA Filter Elements, 47mm (Qty 100)	37
4.2 Theory of Operation	37
4.2.1 Optical System	37
4.2.2 Laser	39
4.2.3 Dewars	39
4.2.4 Detectors	39
4.2.5 Laser Scan Sequence	40
4.2.6 Concentration Calculation	41
5. Specifications	42
5.1 Measurement Specifications	42
5.2 Physical Specifications	43
5.3 Power Requirements	43
6. Installation	44
6.1 Analyzer Installation	45
6.1.1 Plumbing Connections	47
6.1.2 Data Output Connections	49
6.1.3 Power	51
6.2 TGA Software Installation	53
6.2.1 Installation of PC Software	53
6.2.2 Updating TGA Operating System	54
6.2.3 Configure Ethernet Connection	56
6.2.4 Set TGA Serial Number and Identification String	59
6.2.5 Run the PC Software	60
6.3 Detailed Setup Instructions	60
7. Operation	60
7.1 Routine Operation	60
7.1.1 Startup Procedure	60
7.1.2 Routine System Checks	61
7.1.3 Shutdown Procedure	62
7.2 Software User Interface	63
7.2.1 Connect Window	63
7.2.2 Status Window	65
7.2.3 Settings Window	66
7.2.3.1 Laser	67
7.2.3.2 Detectors	73
7.2.3.3 Calculations	75
7.2.3.4 Other	80
7.2.4 Laser Window	84
7.2.4.1 View Less/View More	85
7.2.4.2 Tabbed/Expand	86
7.2.4.3 Display Mode	87
7.2.4.4 Colors	95
7.2.5 Find	95
7.2.6 Graph	98
7.2.7 Data	101
7.2.8 Files	102
7.3 Data Output	104
7.3.1 SDM Output	104
7.3.1.1 Syntax	105
7.3.1.2 Remarks	105
7.3.2 TGA Output to PC	108
7.3.3 TGA Analog Outputs	108
8. Troubleshooting and Maintenance	108
8.1 Lasers and Detectors	108
8.2 Reference Gas	109
8.3 Filtration and Sample Cell Cleaning	109
8.4 Sample Pumps	109
Appendix A. Configuring TGAs for Specific Gas Species	111
A.1 Laser Selection	111
A.1.1 LN2-cooled lasers	111
A.1.2 TE-cooled Lasers	111
A.1.3 Dewar Cables	112
A.1.4 Changing Lasers	112
A.2 Reference Gas	114
A.3 Detectors	116
A.4 Finding the Absorption Line	116
A.5 Air Gap Purge	117
Appendix B. Optical Alignment	119
B.1 Optical Alignment of TGA100 and TGA100A	119
B.1.1 Initial Alignment	122
B.1.2 Horizontal and Vertical Alignment	123
B.1.3 Focus Adjustment	124
B.1.4 Reference Detector Coalignment	125
B.2 Optical Alignment of TGA200 and TGA200A	125
B.2.1 Configure the TGA PC Software	127
B.2.2 Initial Alignment	127
B.2.3 Horizontal and Vertical Alignment	130
B.2.4 Focus Adjustment	131
Appendix C. Optimizing Laser Parameters	133
C.1 Laser Temperature	133
C.2 Zero Current	137
C.3 High Current	139
C.3.1 High Current Count	142
C.4 Omitted Data Count	143
C.5 Modulation Current	143
C.6 Laser Maximum Temperature and Laser Maximum Current	144
C.7 Laser Multimode Correction	144
Appendix D. Optimizing Detector Parameters	147
D.1 Detector Gain and Offset	147
D.2 Detector Preamp Gain	147
D.3 Detector Temperature	147
D.4 Detector Linearity Coefficients	148
Appendix E. Calibration	151
Appendix F. TGA Frequency Response	153
F.1 Measurement Rate	153
F.2 Sample Rate	153
F.3 Digital Filters	154
F.4 Synchronicity	156
F.5 Sample Cell Residence Time	157
Appendix G. Using Swagelok® Fittings	159
G.1 General Notes	159
G.2 Assembly	159
G.3 Common Replacement Parts	160
Appendix H. Upgrading Early Generation TGAs to TE-cooled Laser	163
H.1 TGA200	163
H.1.1 Basic Upgrade	163
H.1.2 Detectors	166
H.1.3 Power Module	166
H.1.4 Purge Boot	166
H.2 TGA100A	166
H.2.1 Basic Upgrade	166
H.2.2 Detectors	167
H.2.3 Holes in Enclosure for Cryocooler Refrigerant Tubes	167
H.2.4 Temperature Control Upgrade	167
H.2.5 Power Module	168
H.2.6 Purge Boot	168
H.3 TGA100	168
H.3.1 Basic Upgrade	168
H.3.2 CPU Module	168
H.3.3 Input and Output Modules	168
H.3.4 Detectors and Detector Cables	169
H.3.5 Temperature Controller	171
Appendix I. Install Temperature Control Upgrade	173
I.1 Install Thermistor Probes	173
I.2 Connect the Control Cable	175
I.3 Enter Control Parameters	176
I.4 Testing	176
I.1 Operation	177

Campbell Scientific TGA200A TGA Series Trace Gas Analzyers - Page 13

Tables, Sample Cell Residence Time as a Function of Sample Cell

Page 13 highlights