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Campbell Scientific TGA200A TGA Series Trace Gas Analzyers - Page 60

Run the PC Software, 6.3 Detailed Setup Instructions, 7. Operation, 7.1 Routine Operation

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TGA Series Trace Gas Analyzers The identification string is also displayed and edited on the Settings tab of the Device Configuration Utility. The identification string is intended as a device nickname and to be a more user friendly way than the serial number by which to identify which TGA is connected to the PC software. The identification string is displayed at the top of the toolbar when the TGA software is connected to a TGA. The identification string can be any text, up to 19 characters. 6.2.5 Run the PC Software Start the TGA Windows (for LN2-cooled laser) or TGA TEC (for TE-cooled laser) software, which will bring up the toolbar. Descriptions of the toolbar functions are given in greater detail in Section 7.2, Software User Interface. 6.3 Detailed Setup Instructions When the TGA is first installed, or if it is reconfigured (for example, with a new laser) the operational parameters must be set for optimal performance. Appendices A through E give detailed instructions to configure the TGA for a specific gas species, performing the optical alignment, optimizing the laser parameters, optimizing the detector parameters, and calibration. If the TGA has already been configured, see Section 7.1.1, Startup Procedure, for routine startup instructions. 7. Operation 7.1 Routine Operation Once the TGA has been set up, it should be checked periodically to verify proper operation and to perform routine maintenance. Consistently recording operating parameters such as pressure and detector signals is strongly encouraged. Significant changes in these values from one operational period to the next, is often indicative of problems with the system. 7.1.1 Startup Procedure 1. This section describes the routine procedure for starting the TGA. If the TGA is equipped with a LN2 cooled laser, cool the laser dewar. NOTE If the TGA is equipped with a TE-cooled laser, it will be cooled automatically. 2. If the TGA is equipped with LN2-cooled detectors (used for long wavelength operation), cool the detectors with liquid nitrogen. NOTE If the TGA is equipped with the standard TE-cooled detectors, they will be cooled automatically. 3. Start the sample vacuum pump. 4. Turn on the reference gas. A regulator pressure of 0 psig and a flow rate of approximately 10 ml/min are recommended. 46

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

Match case Limit results 1 per page

TGA Series Trace Gas Analyzers

The identification string is also displayed and edited on the

Settings

tab of the

Device Configuration Utility

. The identification string is intended as a device

nickname and to be a more user friendly way than the serial number by which

to identify which TGA is connected to the PC software. The identification

string is displayed at the top of the toolbar when the TGA software is

connected to a TGA. The identification string can be any text, up to 19

characters.

6.2.5 Run the PC Software

Start

the TGA Windows

(for LN

-cooled laser) or

TGA TEC

(for TE-cooled

laser) software, which will bring up the toolbar.

Descriptions of the toolbar

functions are given in greater detail in Section 7.2,

Software User Interface

6.3

Detailed Setup Instructions

When the TGA is first installed, or if it is reconfigured (for example, with a

new laser) the operational parameters must be set for optimal performance.

Appendices A through E give detailed instructions to configure the TGA for a

specific gas species, performing the optical alignment, optimizing the laser

parameters, optimizing the detector parameters, and calibration. If the TGA

has already been configured, see Section 7.1.1,

Startup Procedure

, for routine

startup instructions.

Operation

7.1

Routine Operation

Once the TGA has been set up, it should be checked periodically to verify

proper operation and to perform routine maintenance. Consistently recording

operating parameters such as pressure and detector signals is strongly

encouraged.

Significant changes in these values from one operational period to

the next, is often indicative of problems with the system.

7.1.1 Startup Procedure

This section describes the routine procedure for starting the TGA.

the TGA is equipped with a LN

cooled laser, cool the laser dewar.

If the TGA is equipped with a TE-cooled laser, it will be cooled

automatically.

If the TGA is equipped with LN

-cooled detectors (used for long

wavelength operation), cool the detectors with liquid nitrogen.

If the TGA is equipped with the standard TE-cooled detectors,

they will be cooled automatically.

Start the sample vacuum pump.

Turn on the reference gas. A regulator pressure of 0 psig and a flow

rate of approximately 10 ml/min are recommended.

NOTE