SEC Signature DIR Dual Gas Analyzer Brochure

Operation / DescriptionThe SEC Signature DIR is a self-contained dual chamber optical gas analyzer designed for non-intrusive con-tinuous monitoring of process gases. The infrared optical system is self-compensating for most aging, envi-ronmental, and contamination effects resulting in excellent measurement integrity. An industry standard ana-log output provides complete remote alarm, fault and calibration signals. The analog output from the devicecan be connected to chart recorders, data acquisition systems or a process control system.The SEC Signature DIR measures infrared light absorption due to molecular resonances. The monitor is tunedto the infrared signature of the target gas or vapor, measuring light at wavelengths absorbed by the target gasand at wavelengths not absorbed by the target gas. The gas concentration is determined by calculating theratios of the analytical and reference levels. Embedded linearization algorithms keep the output accurate overthe entire measuring range and embedded compensation algorithms maintain measuring accuracy overchanging environmental conditions.The SEC Signature DIR employs a reliable, directly opposed optical system. No mirrors or reflecting surfacesare used in this device. All optical surfaces are heated to discourage measurement error due to condensa-tion. Rugged sapphire windows protect the optics eliminating the corrosive effects found in many processmonitoring applications. Once the unit is spanned to a specific mid range gas concentration (a one time operation), routine calibrationconsists of only rezeroing the device periodically.Features • Capable of non-intrusive continuous monitoring for 2 different gas vapors• 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 system (patented)• Linear outputs• Programmable heated optical chamber• Independent pressure compensation input• Operates in anaerobic atmospheres• Continual self diagnostics• Dedicated 4 to 20 mA output for each channelSEC Signature DIRDual Infrared Process Gas Analyzer© 10/06© 10/06SEC Signature DIR Dual Infrared Process Gas AnalyzerSPECIFICATIONSRange (adjustable): EtO 0-2000mg/liter Rating: Class 1, Div 1, Groups B,C,DHydrocarbon 0-100% VOL (-40 to + 75º C) PendingCO2 0-100% VOL Humidity: 0-99% (Non-condensing)H2O 0-100 mg/literH2O 0-300 mg/liter Operating Temperature: 0-75° CModels: EtO/H2O Operating Pressure: 1 - 55 PSIAHydrocarbon/H2OCO2/ Hydrocarbon Installation Category: Cat. 1, Pollution Degree 2Construction: Anodized aluminum and sapphire Dimensions: 5.5” (H) x 4.25” (W) (inches)Mechanical Connection: 3/4” NPT Weight: 3 lbsAccuracy: ± 5% of reading or ± 3% full scale (Whichever is greater)Repeatability: ± 2%Operating Voltage: 18 – 32 VDC - - - Max. Power Consumption: 35 wattsCurrent Draw (@ 24 VDC): 1.0 A (average)Analog Outputs: Ch 0: 0-20mA (sourced)Ch 1: 0-20mA (sourced)Digital Output: Interactive P.C. link (White Wire)Input Compensation Channel: 4-20mA (400?)Wire Connections: Red wire (+ 24 VDC) - - - Black wire (D.C. common)Blue wire (4-20 mA output signal Ch 0)Yellow wire (4-20 mA output signal Ch 1)White wire (Digital interface)Brown wire (Compensation input)Sensor Electronics Corporation5500 Lincoln Drive, Minneapolis, Minnesota 55436 USA(800) 285-3651 • (952) 938-9486 • Fax: (952) 938-9617 www.sensorelectronic.com • sales@sensorelectronic.comCurrent Output Status .4-20 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-range