Related Manuals for Campbell TGA200
Summary of Contents for Campbell TGA200
- Page 1 TGA200 Trace Gas Analyzer Overview 9/11 C o p y r i g h t © 2 0 1 1 C a m p b e l l S c i e n t i f i c , I n c .
- Page 3 Warranty “PRODUCTS MANUFACTURED BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. (“Campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified on the corresponding Campbell invoice.
- Page 4 SCIENTIFIC, INC., phone (435) 227-2342. After an applications engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific's shipping address is: CAMPBELL SCIENTIFIC, INC.
-
Page 5: Table Of Contents
2-1. Schematic diagram of TGA200 optical system ........3 2-2. TGA200 laser scan sequence ..............4 5-1. Real-time graphics screen................6 6-1. Concentration time series showing response of TGA200 .......9 6-2. Frequency response of the TGA200............9 Tables 6-1. Typical Concentration Measurement Noise ..........7 6-2. - Page 7 TGA200 Trace Gas Analyzer Overview The TGA200 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 TGA200 is a rugged, portable instrument designed for use in the field. It can measure one of...
-
Page 8: System Components
TGA200 Trace Gas Analyzer Overview 1. System Components Figure 1-1 illustrates the main system components as well as additional equipment needed to operate the TGA200. These system components include: • TGA200 Analyzer • Sample intake (15838 shown): Filters the air sample and controls its flow rate. -
Page 9: Theory Of Operation
2. Theory of Operation 2.1 Optical System The TGA200 optical system is shown schematically in Figure 2-1. The optical source is a lead-salt tunable diode laser that operates between 80 and 140 K, depending on the individual laser. The TGA200 LN2 Laser Dewar includes a laser mount that can accommodate one or two lasers. -
Page 10: Laser Scan Sequence
High-Current Phase High Current Phase (Temperature (Temperature Stabilization) Stabilization) Laser Laser Current Current Zero Current Phase Zero-Current Phase (Laser Off) (Laser Off) Omitted Used in Calculation Detector Detector Response Response 2 ms 2 ms FIGURE 2-2. TGA200 laser scan sequence... -
Page 11: Concentration Calculation
D = ratio of sample to reference absorbance 3. Trace Gas Species Selection The TGA200 can measure gases with absorption lines in the 3 to 10 micron range by selecting appropriate lasers, detectors, and reference gas. Lead-salt tunable diode lasers have a limited tuning range, typically 1 to 3 cm within a continuous tuning mode. -
Page 12: Multiple Ramp Mode
TGA200 Trace Gas Analyzer Overview 4. Multiple Ramp Mode The TGA200 can be configured to measure two or three gases simultaneously by alternating the spectral scan wavelength between nearby absorption lines. This technique requires that the absorption lines be very close together (within about 1 cm ), so it can be used only in very specific cases. -
Page 13: Specifications
2208.575 Methane 3017.711 Ammonia 1065.56 The TGA200 multiple-scan mode can be used to measure suitable pairs of gases. Typical performance for some examples is given in Table 6-2. TABLE 6-2. Typical Concentration Measurement Noise for Multiple Scan Lasers Wave number... -
Page 14: Tga200 Frequency Response
1.5 ‰ 0.3 ‰ 6.2 TGA200 Frequency Response There are several issues related to the frequency response of the TGA200, including measurement rate, sample rate, digital filtering, synchronicity, and flow and pressure in the sample cell. Measurement rate: 500 Hz... -
Page 15: Concentration Time Series Showing Response Of Tga200
TGA200 Trace Gas Analyzer Overview Time (seconds) FIGURE 6-1. Concentration time series showing response of TGA200 Frequency (Hz) FIGURE 6-2. Frequency response of the TGA200. The blue line is the measured response, the red line is the model response, the green line is the ideal... -
Page 16: Physical Specifications
TGA200 Trace Gas Analyzer Overview 6.3 Physical Specifications Length: 211 cm (83 in) Width: 47 cm (18.5 in) Height: 55 cm (21.5 in) Weight with peltier-cooled detectors: 78.6 kg (173 lb) Weight with LN2 detectors: 84.1 kg (185 lb) Power Requirements... - Page 18 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)
Need help?
Do you have a question about the TGA200 and is the answer not in the manual?
Questions and answers