WMA-4 CO2 Analyzer For Users Who Demand 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 WMA-4 is designed for applications that demand a high degree of accuracy and control with minimal maintenance. Calibration The design of the WMA-4 ensures an inherent calibration stability that has been confirmed by over 25 years experience in gas analysis technology. The WMA-4 does not require CO2 recalibration (we recommend periodic checks to confirm system integrity). The WMA-4 employs a non-dispersive, System Features infrared measurement technique, coupled with microprocessor-based signal processing, to achieve • High precision, compact CO2 analyzer excellent stability and specificity to CO • Accuracy: < 1% of span concentration over calibrated range 2. Our innovative “Auto-Zero” technology ensures fast • Operation from AC and DC power inputs warm-up, long term stability, accuracy and analyzer • Built-in sampling pump and flowmeter calibration. It also minimizes the effects on span • Automatic pressure and temperature compensation (gas sensitivity) of sample cell contamination, source • High resolution LCD display aging, changes in detector sensitivity and changes in pre-amplifier gain. • Voltage, current and digital (RS232) output • Visual and audible alarm (high and low CO2) Measurement Ranges • Rugged IP65 enclosure The WMA-4 can be supplied with two different • Compatible with PID controllers for control of CO2 optical benches. One bench is optimized for measurement of CO • Integral data logging capability 2 in the ranges of 0-1,000 ppm up to 0-30,000 ppm and another optimized for 0-50,000 or 0-100,000 ppm. For users that want For Use In: to recalibrate the gas analyzer to a new level, this • Growth chambers • FACE sites can easily be achieved as long as it is within the • Environmental control rooms • Breweries range for that particular optical bench. • Open top chambers (OTCs) • Ambient air monitoring Integral Sampling Pump • Greenhouses and nurseries • CO2 leakage monitoring The WMA-4 features an integral, long life air sampling • Incubators • Indoor air quality and safety pump designed for continuous operation for long • Fruit storage • Industrial monitoring term measurement and control of CO2. It has a built-in flowmeter for controlling the flow rate through the analyzer. System power, analog and digital outputs and sensor inputs are connected through Power the terminal blocks located inside the The WMA-4 is fitted with a universal power supply. WMA-4 enclosure. Any AC line voltage between 85V AC and 264V AC (and 47Hz to 63Hz) can be applied at the VAC terminals for system power. If AC power is not available, the WMA-4 can be powered by a 12V DC power source for applications that require measurements at remote locations. WMA-4 CO Technical Specifications 2 Analyzer Analysis Method Real Time Clock Data Storage and Output Non-dispersive infrared, configured as an absolute Accuracy > 1 minute per month at 25° C, operating absorptiometer with microprocessor control of temperature 0-70° C. Automatic correction for Measurements can be recorded manually or linearization. month end and leap years. automatically at user selected intervals. Data Measurement Range Recording is safely stored in battery backed RAM and can CO2: 0-1,000 ppm (µmol mol-1) Manual (by keypress) or automatic at user selected 0-2,000 ppm (µmol mol-1) intervals between 1 and 250 minutes. be later output to a PC in standard ASCII format. 0-5,000 ppm (µmol mol-1) Data Storage 0-10,000 ppm (µmol mol-1) Analog and digital output is available for use with 512K Battery backed RAM (1,250 records) 0-20,000 ppm (µmol mol-1) external data loggers or for display, collection and 0-30,000 ppm (µmol mol-1) Response Time 0-50,000 ppm (µmol mol-1) Display/Analog Output: 1.6 seconds recording from an external PC using the Windows® 0-100,000 ppm (µmol mol-1) Analog Output software included. Custom ranges up to 100,000 ppm upon request. 4-20 mA, 0-1V, 0-2V, 0-3V, 0-4V, 0-5V (Linear). Measurements are automatically corrected for Digital (RS232) Output Flexible, Versatile User Interface temperature and pressure. 9600 baud/8 data bits, 1 start bit/2 stop bits/ no parity. ASCII format. The WMA-4 is an extremely powerful and versatile Accuracy < 1% of span concentration over the calibrated Display instrument. The following accessories/sensors can range, but limited by the accuracy of the calibra-High contrast 2 x 16 character LCD. tion gas mixture. be used with the WMA-4 enhancing measurement Power Supply Linearity 85V AC to 264V AC (47 Hz to 63 Hz) or 12V DC. capability: < 1% throughout the range. • Power Consumption Humidity sensor Stability 115V @ .15A (maximum) • Automatic Zero at regular intervals, corrects for PAR 230V @ .075A (maximum) sample cell contamination, source and detector 12V @ 1.3A (maximum), 0.75A (normal operation) • Temperature/PAR ageing and pre-amplifier gain changes. Gas Connections • Oxygen Sampling Pump Two barbed fittings (inlet and exhaust) for use Integral, long life 12V AC diaphragm pump. with 1/8” (.125”) ID tubing. Gas Flow Rate Through Analyzer Housing The recommended flow rate through the analyzer High impact, IP65 enclosure is 200-500 ml/min. A flow meter is included for easy flow adjustment (200-1,200 ml/min). Dimensions 23 cm (W) x 15 cm (H) x 14 cm (D) Environmental Sensor Interface 5 input channels are available for external sensors Weight (terminal block) 1.9 kg Air Filter PP Systems is continuously updating its products and Filtered sample line (hydrophobic). reserves the right to amend product specifications Calibration without notice. Default value preset in factory (built-in initializa-Windows is a registered trademark of Microsoft tion). Automatic calibration by keypad if required. Corporation. CO2 Control High and low set points. Alarm The WMA-4 is supplied with a Windows® based software program Visual (LED) and audio alarm for transferring and logging sensor data. The sensor data may be recorded manually or automatically depending on user specified settings. Stored records (ASCII) can be later imported into your favorite spreadsheet program for further analysis. Distributor On-line help is available to guide you every step of the way. For further information, Dual Channel WMA-4 please contact us at: The WMA-4 can be supplied as a dual channel instrument capable of sampling two separate gas streams through a single CO2 analyzer. An internal solenoid valve switches between the two channels at user selected intervals. Switching can be performed manually or automatically. For remote applications, the WMA-4 can be 110 Haverhill Road operated from a 12V power source. Suite 301 Amesbury, MA 01913 U.S.A. TEL +1 978-834-0505 FAX +1 978-834-0545 Copyright © 2009 PP Systems. EMAIL sales@ppsystems.com All rights reserved. URL www.ppsystems.com