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Operating Manual

UMP-2

Version: 29/10/18

Umwelt-Geräte-Technik GmbH

| Eberswalder Str. 58 | D-15374 Müncheberg | Tel.: +49 (0) 33 43 2 - 89 575 |

www.ugt-online.de

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UMP-2 combined soil humidity, conductivity and temperature

sensor

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Summary of Contents for UMP-2

Page 1: ...nual UMP 2 Version 29 10 18 Umwelt Geräte Technik GmbH Eberswalder Str 58 D 15374 Müncheberg Tel 49 0 33 43 2 89 575 www ugt online de Seite 1 von 12 UMP 2 combined soil humidity conductivity and temperature sensor ...

Page 2: ... 2 General information 5 2 1 Measuring principle of soil moisture sensors 5 2 2 Schematic design of the UMP 2 6 2 3 Technical data 7 3 Mode of operation of the UMP 2 8 3 1 Water content measurement 8 3 2 Electrical conductivity measurement 8 3 3 Temperature measurement 9 4 Installation 10 4 1 Optimization of the measurement 11 4 2 Data output 12 ...

Page 3: ...urement and time spent on installation and servicing In addition soil disturbance is reduced because only one sensor has to be installed in order to measure three soil properties In Addition to the cable based sensor wireless UMP 2 are also available designed for a different usage UMP 2 Connection to the data logger by cable Data storage on the data logger output via an interface on laptop or remo...

Page 4: ...e any questions or feedback Email info ugt online de or support ugt online de Phone 49 0 33432 89 575 Fax 49 0 33432 89 573 If contacting us by email or fax please include as part of your message your instrument serial number your name address phone and a description of your problem or question Please read these instructions before operating your UMP 2 sensor to ensure that it performs to its full...

Page 5: ... the ability to drive on ground and in environmental and landscape protection both as a decision criterion for planned measures and as an important indicator Since a direct determination of the water content by weighing is not possible in the field indirect procedures are deployed to determine the volumetric water content to obtain non destructive and continuous measurements in the field The volum...

Page 6: ...riants Fig 1 The probe is waterproof and can be completely buried for a depth or horizontal installation It is made of plastic or stainless steel while the measuring rods antennas are always made of stainless steel Regular maintenance is not necessary On request the measuring rods can also be produced in other lengths In this case the measuring frequency also changes Figure 1 schematic design of t...

Page 7: ...nt range 0 100 vol water content Accuracy 2 Resolution 0 1 vol water content Electrical conductivity Measurement range 0 001 5mS cm Optional measurement extension to 40mS cm possible Accuracy 1 Resolution Temperature Measurement range 40 60 C Accuracy 0 5 C across the entire temperature range Resolution 0 01 C Interfaces Digital RS485 Analogue output 3 X 0 1 5 V Including 1 5 m cable with M12 sens...

Page 8: ...n ε of 2 to 5 The dielectric constant of the soil water mix lies between these two levels and is higher the more water there is in the soil Using the calculated dielectric constant the volumetric soil water content is then determined according to the Topp Davis equation The ε value can also be called up when making independent water content calculations using other mathematical formulas 3 2 Electr...

Page 9: ...ectrical conductivity measurements in order have the same origin for all measured values A timespan of 6 minutes should be allowed to achieve a reliable temperature measurement If the UMP 2 is placed on the surface in the ground it is necessary to take into account that sunlight and temperature fluctuations in the atmosphere have a falsifying influence on the measurement of the temperature This is...

Page 10: ...ennas must be completely inserted into the ground because the soil moisture is determined for the entire length of the antennas After the installation the UMP 2 is directly connected to the data logger via an analogue cable The programming of the data logger is usually done by specialized UGT staff If desired the programming of the logger can be adapted by the user on their own Please see the data...

Page 11: ...el and undamaged The correct position of the antennas to each other is crucial for the accuracy of the measurement results Be careful while pushing the antennas into the soil In case of a high penetration resistance avoid the use of more force but rather try to install the probe again at another spot For very rigid soil pre drilling is advised When installed the sensor must not be moved By doing t...

Page 12: ...logger The sensor measures continuously the energy is supplied by the data logger The data is transmitted and stored at the logger from where it can be retrieved via cable or sent to a PC via a modem When combined with UGT loggers the data is available as csv or txt file for further editing Terminal assignment UMP 1 Colour Function Signal Measurement range rt 12V bl GND gn RS485 B ws RS485 A ge Vo...

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