Analyzer O 2/H2 The CIRAS-DC is a dual channel, true Features differential system featuring four • independent infrared gas analyzers High precision, non-dispersive (2 for CO infrared gas analyzers for CO 2 and 2 for H2O). As such, it is 2 CIRAS-DC capable of resolving small differences and H2O between two gas streams in real time. • CO2 Range: 0-2,000 ppm (up to 9,999 ppm) This type of instrument (true differential • analyzer) is the preferred option for plant Fast response photosynthesis and respiration measure- • Analog & digital (RS232) linear ments where differential concentrations output need to be resolved to a high degree of • accuracy and precision. Excellent stability achieved by built-in auto-zero facility • Fully compensated for changes in temperature, pressure and gas interactions • Built-in sampling pump with mass flow controllers • Insensitive to vibration, no moving Dual Channel CO parts ensuring high reliability • Internal & external data logging Data Sheet Technical Specifications Analysis Method RS232 Output Non-dispersive infrared, configured as an Stored/current data output in standard ASCII absolute absorptiometer with microprocessor format at 1200 baud. control of linearization. Analyzer Control The analyzers simultaneously measure All analyzer functions/controls are controlled absolute CO2 and humidity of the reference by the PC (software supplied). and analysis gas streams. The CIRAS-DC For Further Information, Please has 4 independent analyzers for true Real Time Clock Contact Us At: differential measurement. Accuracy: Better than 1 min/month at 25o C. Operating Temperature: 0-70o C. Measurement Range North America CO2: 0-2,000 µmol mol-1 (Optimal Range) Recording Options 0-9,999 µmol mol-1 (Max. Range) By PC or by the instrument. Automatic PP Systems H logging at user selectable intervals between 110 Haverhill Rd., Suite 301 2O: 0-75 mb 10 seconds and 1 hour, controlled by internal Amesbury, MA 01913 U.S.A. real-time clock. Corrections are made for temperature, pressure and foreign gas broadening. Data Storage Tel: +1 978-834-0505 Internal battery backed RAM, stores up to 820 Precision (Absolute) Fax: +1 978-834-0545 records. Memory is maintained during battery CO2: 0.2 µmol mol-1 at 300 ppm change. 0.5 µmol mol-1 at 1,750 ppm Europe 3.0 µmol mol-1 at 9,999 ppm Instrument Status Dectection Indication of instrument malfunction, including H PP Systems 2O: 0.015 mb at 0 mb low battery voltage (< 10.5V) through the 0.020 mb at 10 mb Unit 2, Glovers Court RS232 output. Auto restart if momentary 0.030 mb at 50 mb failure. Bury Mead Rd. Hitchin, Herts SG5 1RT UK Linearity Power Supply Better than 1.0% throughout the range, with External 12V DC power supply with small calibration at 2,000 ppm CO2 or 40 mb. Tel: +44 1462-453411 ripple. Input voltage must not exceed 15V. An optional internal 12V battery can be supplied Fax: +44 1462-431090 Stability (CO2 Analysis) giving up to 2 hours continuous use. Automatic Zero at regular intervals, corrects Email: sales@ppsystems.com for sample cell contamination, source and Power Consumption detector ageing and pre-amplifier gain 12.0 W (initial warm-up) changes. 5.0 W (normal operation) URL: www.ppsystems.com Response Time Operating Environment Electrical: 0.5 seconds 0-45o C, non-condensing. In dirty environ-Display/Analog Output: 1.6 seconds ments, external air filtration is required. Pneumatic: < 5 seconds Housing Air Sampling Powder coated, 1.5mm thick aluminum 100 cm3 min-1 using an integral DC pump. enclosure. Both analysis and reference pumps fitted with mass flow controllers. The analyzer may be Dimensions used in open and closed systems. 280mm W x 205 mm D x 100mm H Environmental Sensor Inputs Weight 3 input channels are available. There is 2.5 kg. integral conditioning of PP Systems’ (Optional, internal battery adds 0.6 kg. to the environmental sensors (%RH, Temperature, weight if used). PAR, etc.). Analog Output (CO2/H2O) PP Systems is continuously updating its 04/0405 8 bit D/A converter giving 0.5% resolution. products and reserves the right to amend Output voltage 0-5V. Both minimum and product specifications without notice. maximum voltage are defined by user.