Campbell Scientific TGA100 Trace Gas Analyzer Manual - Manual (Page 12)

1 OVERVIEW
The TGA100 Trace Gas Analyzer measures trace gas concentration in an air sample using tunable diode laser
absorption spectroscopy (TDLAS). This technique provides high sensitivity, speed, and selectivity. The TGA100 is a
rugged, portable instrument designed for use in the field. It can measure one of a large number of gases by choosing
appropriate lasers and detectors. It incorporates several features that make it ideal for measuring fluxes of trace gases
using gradient or eddy covariance techniques. A vacuum pump continuously pulls the air sample through the analyzer,
which measures the concentration of the trace gas at a 10 Hz rate. The TGA computer provides the user interface;
controlling the analyzer, and calculating, displaying, and storing data in real time.
1.1 System Components
Figure 1-1
Figure 1-1. TGA100 System Components
illustrates the main system components as well as additional equipment needed to operate the TGA100.
These system components include:
• TGA100 Analyzer: The analyzer optics and electronics, mounted in an insulated fiberglass enclosure.
• TGA100 PC: A desktop computer, supplied as part of the TGA100.
• Fiber optic cable (7737-L): Connects the TGA100 analyzer to the TGA100 PC.
• Sample Intake (15838 shown): Filters the air sample and controls its flow rate.
• Sample pump (RB0021-L shown): Pulls the air sample and reference gas through the analyzer at low pressure.
• Suction hose (7123): Connects the analyzer to the sample pump. Supplied with RB0021 sample pump.
• Reference gas: tank of reference gas, with pressure regulator (supplied by user).
• Reference gas connection (15837): Flow meter, needle valve, and tubing to connect the reference gas to the
analyzer.
TGA100 Analyzer
Reference Gas Sample Pump
TGA100 PC
Sample Intake
Fiber Optic
Cable
Reference Gas Connection
Suction Hose
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