METER PHYTOS 31, Manual

Page 1: ...PHYTOS 31 ...

Page 2: ...ger 4 2 3 Interpreting Data 6 2 3 1 Understanding Data from METER Data Loggers 6 2 3 2 Understanding Data from Other Data Loggers 7 3 System 9 3 1 Specifications 9 3 2 Components 10 3 3 Theory 11 4 Service 12 4 1 Calibration 12 4 2 Cleaning and Maintenance 12 4 3 Troubleshooting 12 4 4 Customer Support 13 4 5 Terms and Conditions 14 Index 15 10386 06 10 4 2019 ...

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Page 4: ...ace Section 3 3 It has a very low power requirement which allows for many measurements over a long period of time with minimal battery usage This sensor also has very high resolution which detects very small amounts of water or ice The PHYTOS 31 does not need to be painted before use eliminating the need for individual sensor calibration Prior to use verify the PHYTOS 31 arrived in good condition ...

Page 5: ...llow the steps listed in Table 1 to set up the PHYTOS 31 and start collecting data Table 1 Installation Tools Needed Mounting post or other mounting apparatus Zip ties or 4 40 bolts Preparation Apply Ultraviolet UV Protectant Section 4 2 Mounting Install Sensor to Mounting Post Install the mounting post either in or above the canopy as needed Figure 1 Hold the PHYTOS 31 sensor with the electrode t...

Page 6: ...sensor can also be used with other data loggers such as those from Campbell Scientific Inc The PHYTOS 31 sensor requires excitation voltages in the range of 2 5 to 5 0 VDC and outputs a single ended DC voltage that is proportional to the amount of water on the sensor surface PHYTOS 31 produces an output voltage that depends on the dielectric constant of the medium surrounding the sensor and ranges...

Page 7: ... the PHYTOS 31 3 Set the measurement interval PHYTOS 31 data can be downloaded from these loggers using either ZENTRA Utility or ZENTRA Cloud Refer to the logger user manual for more information about these programs 2 2 2 CONNECT TO A NON METER DATA LOGGER The PHYTOS 31 can be used with non METER third party data loggers Refer to the third party logger manual for details on single ended voltage me...

Page 8: ...sensor cable 2 Strip and tin the wires 3 Wire it directly into the data logger This option has the advantage of creating a direct connection and minimizes the chance of the sensor becoming unplugged However it then cannot be easily used in the future with a METER readout unit or data logger Option 2 Obtain an adapter cable from METER The adapter cable has a connector for the stereo plug connector ...

Page 9: ...portional to the amount of water on the sensor s surface Ice has a much lower dielectric constant than that of liquid water so the sensor output from frost is much lower than that from a similar amount of rain or dew Figure 5 Figure 5 Example raw PHYTOS 31 output 2 3 1 UNDERSTANDING DATA FROM METER DATA LOGGERS With METER data loggers users have two options for interpreting data using number of mi...

Page 10: ...n identify a new wetness threshold from the time series data and calculate wetness duration from the new threshold until the sensor can be cleaned Section 2 3 2 The data in this column only gives a wetness reading every wake interval typically 30 min or more instead of the 1 min wetness resolution available in column 1 and 2 This column can also be used for understanding the phase of the water as ...

Page 11: ...bove the dry output and subsequent readings should be compared to the dry output to determine surface wetness When using a non METER data logger it is important to collect data frequently enough to capture changes in the surface wetness A sampling frequency of 15 min or less is often necessary to accurately capture leaf wetness duration ...

Page 12: ...ure Range Minimum 40 C Typical NA Maximum 60 C NOTE Sensors may be used at higher temperatures under certain conditions contact Customer Support for assistance Cable Length 5 m standard 40 m maximum custom cable length NOTE Contact Customer Support if a nonstandard cable length is needed Connector Types 3 5 mm stereo plug connector or stripped and tinned wires ELECTRICAL AND TIMING CHARACTERISTICS...

Page 13: ...er surface It has a very low power requirement which allows for many measurements over a long period of time such as a growing season with minimal battery usage This sensor also has very high resolution which allows for detection of very small amounts of water or ice on the sensor surface Water on the sensor surface does not need to bridge electrical traces to be detected as is common with resista...

Page 14: ...y The sensor has also been engineered to closely match the radiative properties of real leaves Healthy leaves generally absorb solar radiation effectively in much of the visible portion of the spectrum but selectively reject much of the energy in the near infrared portion of the spectrum The surface coating of the PHYTOS 31 absorbs well in the near infrared region but the white color reflects most...

Page 15: ...YTOS 31 in areas with unusually high radiation loads The PHYTOS 31 comes pretreated with UV protectant but METER recommends reapplying McNett UV Tech every 45 days McNett is the only tested and approved UV blocking system for the PHYTOS 31 To apply McNett UV Tech 1 Wipe sensor clean using water and a clean soft cloth 2 Spray soft cloth with UV Tech spray 3 Rub both sides of the sensor surface with...

Page 16: ...through Friday 7 00 am to 5 00 pm Pacific time Email support environment metergroup com sales environment metergroup com Phone 1 509 332 5600 Fax 1 509 332 5158 Website metergroup com EUROPE Customer service representatives are available for questions problems or feedback Monday through Friday 8 00 to 17 00 Central European time Email support europe metergroup com sales europe metergroup com Phone...

Page 17: ...Service 4 5 TERMS AND CONDITIONS By using METER instruments and documentation you agree to abide by the METER Group Inc USA Terms and Conditions Please refer to metergroup com terms conditions for details ...

Page 18: ...ta logger connecting 3 5 METER logger 4 6 7 non METER logger 4 5 7 requirements 10 E email 13 I installation 2 3 location 2 preparation 2 tools required 2 M maintenance 12 13 O operation 11 S specifications 9 12 electrical and timing 9 10 physical 9 T terms and conditions 14 theory 11 thermal properties 11 troubleshooting 12 13 U UV protectant 2 12 13 W wiring 3 5 ...

Page 19: ...llman WA 99163 T 1 509 332 2756 F 1 509 332 5158 E info metergroup com W metergroup com METER Group AG Mettlacher Straße 8 81379 München T 49 89 12 66 52 0 F 49 89 12 66 52 20 E info europe metergroup com W metergroup de 2007 2010 2012 2018 2019 All Rights Reserved ...

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