nomad HB3289-01 Users Handbooks
                                                                    | |
Contents
| 
The bucket assembly is adjusted totip each time an amount of waterproportional to 0.2 mm of rainfall hascollected in one or other side of the bucket.Therefore, each time the bucket tips, a signalproportional to precisely 0.2 mm of rainfall issent to the logger.The gauge has a body and funnelconstructed of aluminium alloy, with anaccurately machined “Septum Ring”.The aluminium base plate isequipped with levelling screws and a spiritlevel for precise adjustment.6.7.1 Rainfall Sensor SpecificationPart number: 187060DTransducer: Tipping BucketAperture: 400 cm²Resolution: 0.2 mm per tipAccuracy: ±1%Capacity: UnlimitedOperating temp: 1°C to 85°CSupply Voltage: 7 - 20 V DC (supplied from environmentalcase)Power Consumption: Typically 2-3 mAOutput calibration: Debounced 0 to 5 V pulses.Cable: 9 m cable supplied6.8 Soil Temperature SensorThis is an additional sensor available for usewith “Special” Nomad Weather Systems.The soil temperature sensor isconnected by cable to an auxilliary junctionbox. Clip this box to the lower part of thetripod, and connect the output cable to the7-pin socket in the bottom panel of a specialsystem environmental case.The sensor is designed to be installed at any depth, by digging a smallhole to the required depth, locating the sensor then back filling. This techniqueavoids the requirement for multi-length probes, and is simpler and more reliablethan attempting to insert long thin probes into hard soil. The sensor may beused to measure ground surface temperature by installing in the top 1 cm of thesoil sample.6.8.1 Soil Temperature Sensor SpecificationPart number: 120620BSensor type: Semi conductor current generatorMeasuring range: -40°C to 60°CCalibrated accuracy: ±0.5°C between -20 to + 50°CSupply voltage: 7 to 15 VPower consumption: Typically <1 mAOutput calibration: Nominally 1.5 V at 0°C and 1.8 V at 50°CStandard Sensors02024Figure 16: Tipping bucket rainfallsensor01061Figure 17: Soil temperature sensorPage 46 of 68NOMAD Portable Weather StationUsers Handbook |
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine