EGM-4 Environmental Gas Analyzer for CO2 For Users Who Demand Portability, Accuracy, Reliability And Long Term Stability For over 25 years, PP Systems has been manufacturing high quality CO2 infrared gas analyzers for researchers worldwide. The EGM-4 is designed for applications that demand a high degree of accuracy and control with minimal maintenance. Calibration System Features The design of the EGM-4 ensures an inherent • High precision, compact CO calibration stability that has been confirmed by 2 analyzer over 25 years experience in gas analysis technology. • Accuracy: < 1% of span concentration over calibrated range The EGM-4 does not require CO • Lightweight, field portable 2 recalibration (we recommend periodic checks to confirm system • Built-in sampling pump integrity). The EGM-4 employs a non-dispersive, • Automatic pressure and temperature compensation infrared measurement technique, coupled with • High resolution LCD display microprocessor-based signal processing, to achieve • Voltage, current and digital (RS232) output excellent stability and specificity to CO2. Our innovative “Auto-Zero” technology ensures fast • Visual and audible alarm warm-up, long term stability, accuracy and analyzer • Integral data logging capability calibration. It also minimizes the effects on span (gas sensitivity) of sample cell contamination, source For Use In: aging, changes in detector sensitivity and changes • Plant physiology • Air-sea surface exchange (pCO in pre-amplifier gain. 2) • Soil CO2 efflux • Animal/insect respiration Measurement Ranges • Whole canopy assimilation • Environmental toxicology The EGM-4 can be supplied with two different • Global change studies • Volcanology optical benches. One bench is optimized for • CO measurement of CO 2 sequestration • Bioremediation 2 in the ranges of 0-1,000 ppm up to 0-30,000 ppm and another optimized • Forest & agricultural meteorology • Porometry for 0-50,000 or 0-100,000 ppm. For users that want to recalibrate the gas analyzer to a new level, this The sensor inputs (I/O), analog and can easily be achieved as long as it is within the digital output (RS232), 4-20mA output range for that particular optical bench. and gas connections are conveniently located on the top of the EGM-4. Portability The EGM-4 is a compact, lightweight (1.9 kg) instrument that is packaged in a rugged aluminum enclosure. It can be supplied with either a 12V lead acid battery (up to 4 hours continuous use) or 12V NiMH battery (up to 8 hours continuous use) making it an ideal instrument for field applications. For laboratory studies, it can be operated continuously from mains power using the AC power supply that is included. EGM-4 Environmental Technical Specifications Gas Analyzer for CO Analysis Method Recording 2 Non-dispersive infrared, configured as an absolute Manual (by keypress) or automatic at user selected absorptiometer with microprocessor control of intervals between 1 and 250 minutes. Integral Sampling Pump linearization. Keypad Measurement Range Custom, tactile keypad. The EGM-4 features an integral, long life air sampling CO2: 0-1,000 ppm (µmol mol-1) Data Storage 0-2,000 ppm (µmol mol-1) pump that can be controlled for applications that 512K Battery backed RAM (1,000 records). 0-5,000 ppm (µmol mol-1) require both dynamic and static measurements. 0-10,000 ppm (µmol mol-1) Response Time 0-20,000 ppm (µmol mol-1) Display/Analog Output: 1.6 seconds For dynamic measurements, the pump operates 0-30,000 ppm (µmol mol-1) Analog Output at a flow rate of approximately 350 ml/min. Static 0-50,000 ppm (µmol mol-1) 4-20 mA, 0-1V, 0-2V, 0-3V, 0-4V, 0-5V (Linear). 0-100,000 ppm (µmol mol-1) measurements are performed by simply disabling Digital (RS232) Output Custom ranges up to 100,000 ppm upon request. 9600 baud/8 data bits, 1 start bit/2 stop bits/ no the integral pump and injecting a gas stream Measurements are automatically corrected for parity. ASCII format. temperature and pressure. directly into the gas analyzer for analysis. Display Accuracy High contrast 2 x 16 character LCD. Data Storage and Output < 1% of span concentration over the calibrated range, but limited by the accuracy of the calibra-Power Supply 12V rechargeable lead acid battery providing Measurements can be recorded manually or tion gas mixture. up to 4 hours continuous operation or 12V NiMH automatically at user selected intervals. Data Linearity rechargeable battery providing up to 8 hour con- < 1% throughout the range. tinuous use. Battery life may be reduced when is safely stored in battery backed RAM and can Stability EGM-4 is used with add-on sensors/accessories. be later output to a PC in standard ASCII format. Automatic Zero at regular intervals, corrects for Power Consumption sample cell contamination, source and detector 12V @ 0.7A (warm-up) Analog and digital output is available for use with ageing and pre-amplifier gain changes. 12V @ 0.4A (normal operation) external data loggers or for display, collection and Sampling Pump Gas Connections Integral DC pump operating at a flow rate of recording from an external PC using the Windows® Two barbed fittings (inlet and exhaust) for use 350 ml/min. Pump can be disabled for static with 1/8” (.125”) ID tubing. software included. measurements on demand. Housing Gas Flow Rate Through Analyzer High impact, aluminum enclosure. Flexible, Versatile User Interface Minimum flow rate: 200 ml/min Maximum flow rate: 500 ml/min Operating Environment The EGM-4 is an extremely powerful and versatile -5° C - 50° C, non-condensing. In dirty Environmental Sensor Interface environments, external air filtration is required. instrument. The following accessories/sensors can Two inputs available for use with external sensors (humidity, temperature, PAR, oxygen, Dimensions be used with the EGM-4 enhancing measurement soil respiration, etc.). 18 cm (W) x 21.5 cm (H) x 6.3 cm (D) capability: Air Filter Weight • 1.9 kg Humidity sensor Filtered sample line (hydrophobic). • Calibration Soil respiration chamber PP Systems is continuously updating its products and Default value preset in factory (built-in initializa- • reserves the right to amend product specifications Soil temperature tion). Automatic calibration by keypad if required. without notice. • PAR CO2 Control Windows is a registered trademark of Microsoft High and low set points. • Corporation. Temperature/PAR Alarm • Canopy assimilation Audio alarm • Oxygen Real Time Clock Distributor • Accuracy > 1 minute per month at 25° C, operating Steady state porometer temperature 0-70° C. Automatic correction for month end and leap years. For further information, please contact us at: The EGM-4 is supplied with a Windows® based software program 110 Haverhill Road for transferring and logging sensor data. The sensor data may be Suite 301 recorded manually or automatically depending on user specified settings. Stored records (ASCII) can be later imported into your Amesbury, MA 01913 U.S.A. favorite spreadsheet program for further analysis. TEL +1 978-834-0505 On-line help is available to guide you every step of the way. FAX +1 978-834-0545 Copyright © 2009 EMAIL sales@ppsystems.com PP Systems. All rights reserved. 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