SEC - Signature Process Gas Analyzer - Brochure

Operation / DescriptionThe SEC Signature is a self-contained optical gas analyzer designed for non-intrusive continuousmonitoring of process gases. The infrared optical system is self-compensating for most aging,environmental, and contamination effects resulting in excellent measurement integrity. An industrystandard analog output provides complete remote alarm, fault and calibration signals. The analog outputfrom the device can be connected to chart recorders, data acquisition systems or a processcontrol system.The SEC Signature measures infrared light absorption due to molecular resonances. The monitor istuned to the infrared signature of the target gas or vapor, measuring light at wavelengths absorbed by thetarget gas and at wavelengths not absorbed by the target gas. The gas concentration is determined bycalculating the ratios of the analytical and reference levels. Embedded linearization algorithms keep theoutput accurate over the entire measuring range and embedded compensation algorithms maintainmeasuring accuracy over changing environmental conditions.The SEC Signature employs a reliable, directly opposed optical system. No mirrors or reflectingsurfaces are used in this device. The anodized aluminum surfaces of the optical chamber are heated todiscourage condensation. Sapphire windows protect the optics eliminating the corrosive effects found inmany process monitoring applications.Once the unit is spanned to a specific mid range gas concentration (a one time operation), routinecalibration consists of only rezeroing the device periodically.Features • Capable of continuous monitoring for gas vapors• Low cost• Infrared sensing technology• Designed for nonextractive sampling installation• Virtually maintenance free• Explosion proof• Immune to poisoning and etching• Designed for harsh environments• Compact and lightweight• Fast response time• Simple calibration• Self-compensating optical bench (patented)• Linear output• Unaffected by humidity and pressure• Heated optical chamber• Low power consumption• Operates in anaerobic atmospheres• Continual self diagnostics• 4 to 20 mA outputSEC SSiiggnnaattuurreeProcess Gas Analyzer© 6/09Range (adjustable): EtO 0-2000mg/literHydrocarbon 0-100% VOLCO2 0-20% VOLModel: EtO P/N 142-0597Hydrocarbon P/N 142-1014CO2 P/N 142-0848Construction: Anodized aluminum and sapphireMechanical Connection: 3/4” NPTWeight: 18 ouncesAccuracy: +_ 5% of reading or +_ 3% full scale(Whichever is greater)Repeatability: +_ 2%Operating Voltage: 18 - 32 VDC -- -- --Max. Power Consumption: 6 wattsCurrent Draw (@24 VDC): 250 mA (average)450 mA (peak)Analog Output: 0-20 mA (sourced)Digital Output: Interactive P.C. linkWire Connections: Red wire (+ 24 VDC) -- -- --Black wire (D.C. common)Blue wire (4-20 mA output signal)White wire (Calibration / digital interface)SpecificationsSensor Electronics Corporation5500 Lincoln Drive, Minneapolis, Minnesota 55436 U.S.A. • (800) 285-3651 • (952) 938-9486 • FAX: (952) 938-9617Email: sales@sensorelectronic.com • website: www.sensorelectronic.com© 6/09Current Output Status4-20 mA Normal measuring mode0.0 mA Unit Fault0.2 mA Reference channel fault0.4 mA Analytical channel fault0.8 mA Unit warm up1.0 mA Optics fault1.2 mA Zero drift fault1.6 mA Calibration fault2.0 mA Unit spanning2.2 mA Unit zeroing4.0 mA Zero gas level5.6 mA 10% Full Scale8.0 mA 25% Full Scale12 mA 50% Full Scale16 mA 75% Full Scale20 mA Full Scale>20 mA Over-rangeApprovals: CSA, CERating: Class 1, Div 1, Groups B,C,D(-40C to 50C)Humidity: 0-99% (Non-condensing)Operating Temperature: 0-65º COperating Pressure: 1 PSIA - 55 PSIAInstallation Category: Cat. 1, PollutionDegree 2Dimensions