EC150 CO 2/H 2O Open-Path Gas Analyzer9CSAT3 sonic reporting rangeFull scale wind: ±65.6 m/sSonic temperature: −50 to 60 °CAuxiliary sensors7BarometerInternal basic barometerAccuracy−30 to 0 °C: ±3.7 kPa at −30 °C, falling linearlyto ±1.5 kPa at 0 °C0 to 50 °C: ±1.5 kPaMeasurement rate: 10.0 HzOptional enhanced barometerManufacturer: VaisalaModel: PTB110Accuracy: ±0.15 kPa (−30 to 50 °C)Measurement rate: 1.0 HzEC150 temperature sensorManufacturer: BetaThermModel: 100K6A1A ThermistorAccuracy: ±0.15 °C (−30 to 50 °C)5.2 Output SignalsThe EC100 electronics can output data from the EC150 by several means.• Campbell Scientific SDM• RS-485• USB• Analog outSynchronous Device for Measurement communications protocol, or SDM, is aproprietary serial interface developed by Campbell Scientific forcommunication between a datalogger and a peripheral or sensor. In almost allcases, SDM is the preferred communications protocol with the exception ofmeasurement heights requiring cable lengths greater than 100 meters. In thiscase, RS-485 output is recommended. See Section 4.6.2.1, SDM Output (p. 5),for details on SDM output, see Appendix C, Alternate EC100 Outputs (p. C-1),for greater detail on RS-485, USB, or analog outputs.SDM communications are output as the FLOAT data type.5.3 Physical DescriptionOptical measurement path length: 15.37 cm (6.05 in)Spatial separation fromCSAT3A sampling volume: 5.0 cm (2.0 in)7 refer to manufacturer’s product brochure or manual for details
