68 | 866-660-8864 | fax 503-296-2529 | www.senvainc.com FEATURES Display and menu ▪ Easy set point and calibration adjustments. Set offsets for CO2 CT1O Outdoor CO2 Sensor LCD display with field calibration menu 2000/5000/10000 ppm CO2 Integrated set-point relay Field replaceable element Internal heater for increased operating range DESCRIPTION Senva CO2 sensors maximize energy savings by ensuring optimal ventilation. Measuring exterior CO2 levels ensures optimized economizer control. The CT1O series is an outside air sensor with NDIR sensing element and features that include a standard LCD, setpoint relay, menu selectable auto-calibration and provision to offset the reading +/-250ppm. APPLICATIONS ▪ Controlling ventilation in response to occupancy ▪ Economizer control ▪ Facilitates compliance with ASHRAE 62.1 standard for air quality Easy to install and maintain ▪ Integrated display and push-button menus for field selectable scale, calibration, and operational modes ▪ Dual 4-20mA and 0-5V/0-10V output (jumper select- able) ▪ Integrated high-reliability solid-state set-point relay is ideal for direct control applications; easy to set up thanks to LCD High reliability reduces call backs ▪ Non-dispersive infrared sensing element (NDIR) ▪ 15+ year life expectancy on CO2 sensing element ▪ Industry leading 7-year limited warranty on electron- ics; NDIR module 3 years High accuracy for improved system performance ▪ Internal heater for reliable outdoor operation ▪ Selectable auto-calibration mode returns sensor to baseline values ▪ ±30ppm, ±3% of reading 7 year limited warranty PROUDLY MADE IN USA CHigher Reliability, Faster Installation, Superior Accuracy | Sense the difference | 69 AIR QUALITY ORDERING OUTDOOR AIR QUALITY CO2OA Series To order replacement sensor elements, please consult factory Enclosure D = Duct O = Outdoor Temperature A = None B = Transmitter C = 100Pt (385) D = 1000Pt (385) E = 10k type 2 F= 10k type 3 G = 10k type 3 w/11k shunt H = 3k I = 2k2 J = 1k8 K = 20k L = 100k Display (LCD) D = Display X= None CT1 O - 3 SPECIFICATIONS Power Supply12-30VDC, 50mA max / 24VAC (1) , 100mA max. Analog Outputs Dual Analog3-wire 4-20mA and 0-5V/0-10V (2) (dip switch selectable) Output scaling CO20 - 2000 (default) or 0 - 5000/10000 ppm (selectable) Output Scaling Temp 32 to 122oF (0-50oC) or -40 to 140oF (-40-60oC) (Switch Selectable) Digital Setpoint OutputProgrammableSolid-state, 1A @ 30VAC/DC, N.O. CO2 Sensor Perfor- mance TypeNon-dispersive Infrared (NDIR) Accuracy ±(30ppm + 3% of reading) (400-2000ppm), -10-50ºC, 0-85%RH ±(50ppm+ 5% of reading) (2000-5000ppm), -10-50ºC, 0-85%RH <5000ppm consult factory Response time 60s to 90% reading Output update rate1s Operating Environment14 to 122oF (-10 to 50ºC), 0 to 95% RH LCD Menu Setup Pa- rameters SPH , Setpoint, Hi (On point)500ppm to full-scale (800ppm default) SPL, Setpoint, Lo (Off point) 400ppm to full-scale-50 (700ppm default) SCL , Scaling0-2000ppm (default), 0-5000ppm, 0-10000ppm ADJ, AdjustmentOffset adjustment +/-250ppm (0 default) CAL, Calibration modeAutomatic mode ON or OFF (default=ON) RUN, Run modeDisplays CO2 in ppm Operating Environment Temperature-4 to 122ºF (-20 to 50oC) Humidity0-95% non-condensing Enclosure MaterialABS/Polycarbonate Enclosure Rating Nema 1; Add drain holes to enclosure bottom to achieve Nema 3R rating Dimensions4.0’ h x 4.4”w x 2.1”d (+6.8” probe) AgencyComplianceCE, RoHS (1) One side of transformer secondary is connected to signal common. Dedicated transformer is recommended. (2) 15-30VDC/24VAC power supply voltage required for 10 volt output. (3) When operating unit outside of each element’s specified operating temperature, accuracy may be reduced.Next >