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Related Manuals for Kipp & Zonen LAS MkII ET System
Summary of Contents for Kipp & Zonen LAS MkII ET System
- Page 1 Instruction Manual LAS MkII ET System...
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Page 2: Important User Information
Dear customer, thank you for purchasing a Kipp & Zonen instrument. It is essential that you read this manual completely for a full understanding of the proper and safe installation, use, maintenance and operation of your new LAS MkII ET System. Please read this manual in conjunction with the instruction manual for the LAS MKII scintillometer. -
Page 3: Table Of Contents
Via the COMBILOG display ..................... 25 Calibration coefficients ......................... 25 Data files ............................26 Combilog 1022 configuration file for LAS MkII ET system ............27 MAINTENANCE AND RECALIBRATION ........................... 28 Check the power is on ........................28 Check COMBILOG date and time ....................28... - Page 4 Check sensor condition ......................... 28 Check cables and connections ...................... 28 Check condition of the tower, guy wires and anchoring ............. 28 Download the data from the COMBILOG: ..................29 Check the LAS MkII Scintillometer ....................29 SPECIFICATIONS ..................................29 TROUBLE SHOOTING ................................
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Page 5: Introduction
(due to rainfall or irrigation) minus the amount of loss of water (due to evapo-transpiration, surface run-off and drainage). The LAS MkII ET System has been developed to provide area-representative surface fluxes of sensible heat (H) and latent heat (L E). -
Page 6: Key Parts Of The Las Mkii Et System
Key parts of the LAS MkII ET system The LAS MkII ET system consists of four parts; a LAS MKII scintillometer, an extended set of meteorological sensors with a mast, a data logger in a weatherproof enclosure, and data processing software to run on a Windows®... -
Page 7: Installation
2 INSTALLATION Please follow the instructions in this section carefully for the mechanical and electrical installation of the LAS MkII ET System. Do not turn on power to the transmitter, receiver or data logger until instructed to do so. Ensure that fixings and mountings are securely tightened when instructed to do so. -
Page 8: Meteorological Sensors And Mast
2.1.2 Meteorological sensors and mast The following items are included with the meteorological sensors and mast: Temperature sensor x 2, upper and lower Range C to +60 Output PT-100 (4-wire) Calibration 0.03ºC 1/10 DIN accuracy Wind speed sensor Operating temperature C to +80 Range 0 to 60 m/s... - Page 9 Output 20 mV Mast, telescopic Height 4 m maximum Guy wires 3 stainless steel wires with securing pins Baseplate With socket for mast Lightning protection Mast top rod and earth spike U-shaped - wind speed and direction sensors Mounting arms 2-sided - upper temperature sensor and NR Lite2 1-sided - lower temperature sensor...
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Page 10: Nr Lite2 Net Radiometer
2.1.3 NR Lite2 Net Radiometer The mast includes a mounting arm for the Kipp & Zonen NR Lite2 net radiometer. Net radiation sensor, NR-Lite2 Operating temperature -40 °C to +80 °C Range ± 2000 W/m ~ ± 20 mV Output 2.1.4 COMBILOG Data Logger The data logger is fitted in a stainless steel weather-proof enclosure with a clamp for the mast. -
Page 11: Site Selection Procedure
Site selection procedure This section provides information on selecting an appropriate installation site. 2.2.1 LAS MkII scintillometer For the general installation and site requirements of the LAS MkII scintillometer please refer to its manual. For reliable air (C ) and flux (H and LvE) measurements it is important to meet the installation requirements of the scintillometer. -
Page 12: Assembling The Meteorological Mast And Sensors
Assembling the meteorological mast and sensors 2.4.1 The mast Assemble the mast horizontally on the ground in accordance with the dimensions shown below. -
Page 13: The Mounting Arms And Sensors
The safe clamping zone of each section is indicated by red stripes on each mast section, as shown below. 1. The nominal mast height of 4 m is achieved when clamping the sections at their lower marks. 2. The guy wires are supplied pre-assembled to triangular collar. This must be slid over the upper section of the mast, as shown above, before fitting any other items. -
Page 14: Installing The Mast
When the temperature sensors are positioned too close to each other no reliable direction for the temperature gradient can be measured, particularly during the day. The minimum distance between the sensors is 1.7 m. The lower temperature sensor should not be mounted more than 1m above the ground (or the effective surface height, such as the mean level of grass or a crop around the mast). -
Page 15: Mounting The Data Logger Enclosure
The 3 guy ropes should have moderate and equal tension, do not put a bending force on the mast. 3. Fix down the base plate of the mast with 4 smaller securing pins. 4. Finally, drive in the lightning rod earth spike Check the guy wire tension and the mast alignment frequently. -
Page 16: The Soil Heat Flux Sensors
The installation should now be as in the drawings above. Note Check that the net radiometer is horizontal using the bubble level on its upper surface. The soil heat flux sensors The last sensors to be installed are the soil heat flux plates. Place them on the same side of the mast as the net radiation sensor (towards the equator) and at a spot that is not disturbed by footsteps. -
Page 17: Sensor Overview
Do not position the plates directly beneath the net radiation sensor, as they may disturb the measurements Depending on the soil type and the presence of vegetation the plates should be buried at a depth of about 30 mm for bare soil conditions or just beneath the surface of fully covered soil (a few mm). In the latter case the amount of ‘missing’... -
Page 18: Connecting The Sensors
Connecting the sensors Note that the air pressure sensor (P) is pre-installed inside the data logger enclosure. All cables (signal and power) enter the data logger enclosure at the bottom through weatherproof cable glands and connect to the over-voltage protection (OVP) module terminals as in the following table. The over-voltage protection blocks have spring-loaded terminals. - Page 19 Analogue input channels Instrument Wire / Function Logger Terminal Input Yellow Pressure sensor AIN1 Green AGND (Thermopile +) Net Radiation AIN2 Blue (Thermopile −) AGND UCn2 from LAS MkII AIN3 Yellow AGND Green UDemod from LAS MkII AIN4 Make link wire to pin 35 AGND White Upper Temperature (T1)
- Page 20 AGND 12 VDC Power Output Terminals Instrument Wire / Function Terminal Power Pink / Brown Wind Speed Grey / White +12 V Pink / Brown Wind Direction Grey / White +12 V Pressure sensor Blue In COMBILOG Enclosure +12 V 12 VDC Power Input Customer Cable Wire...
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Page 21: Installing The Scintillometer
Adjust the date and time setting of the COMBILOG data logger if necessary. At this stage do not turn on the power to the LAS MKII scintillometer. When the system is working properly, roll up extra lengths of signal and power cables and fix them to the mast behind the data logger enclosure using cable ties. -
Page 22: Software Installation And Configuration
4 SOFTWARE INSTALLATION AND CONFIGURATION The software required for the LAS MKII ET system consists of the following programs: EVATION software to process measured data into surface fluxes and to configure the LAS MkII scintillometer (as an alternative to using the receiver display and menu keys). -
Page 23: Communicating With The Combilog
be configured in order to communicate with the data logger. Select ‘Communication’ and the following window appears. Set the communication parameters to suit the computer, for example: Interface Kind : RS-232 Parameters: ComPort COM1 Baudrate 19200 Char Format Add Timeout 1000 ms Click on ‘OK’. -
Page 24: Original Combilog Module Settings And Programs
5 OPERATION AND MEASUREMENT Once the LAS MKII scintillometer and the weather station have been installed and connected to a power source, the data logger of the LAS MKII ET System will automatically start recoding. REAL-TIME MONITORING OF MEASUREMENTS The measurements can be monitored via the COMBILOG support software or by using the display on the data logger. -
Page 25: Via The Combilog Display
Calibration coefficients Some of the sensors of the LAS MKII ET system are supplied with calibration certificates, for example the net radiation sensor and the soil heat flux plates. The calibration coefficients can be found in either the sensor instruction manuals / certificates or in the original data logger program, which is stored in the COMBILOG’s internal memory. -
Page 26: Data Files
The number of columns (in this case 15) is constant and independent of the sensor configuration of the LAS MkII ET System. If fewer sensors are used dummy values (-9999) are inserted in the ‘empty’ columns for the specific missing sensor. -
Page 27: Combilog 1022 Configuration File For Las Mkii Et System
Combilog 1022 configuration file for LAS MkII ET system... -
Page 28: Maintenance And Recalibration
6 MAINTENANCE AND RECALIBRATION Every time one visits the site, preferably at 2 week intervals, it is recommended to follow the inspection procedure described. Check the power is on Check if the green LED labelled “RUN” on the COMBILOG data logger is activated. If so the display of the COMBILOG should show the actual date and time and the real time measurements of all sensors. -
Page 29: Download The Data From The Combilog
Check the guy wire tension and the mast alignment frequently. If the ground is not firm enough to keep the mast vertical in all weather conditions, use concrete for anchoring. Download the data from the COMBILOG: It is recommended to download data from the COMBILOG every two weeks. ... -
Page 30: Trouble Shooting
8 TROUBLE SHOOTING The LAS MkII scintillometer and the ET System are designed for long periods of operation with little operator maintenance. However, if a problem occurs that cannot be corrected using the standard operating information supplied in the preceding sections of this manual, and in the scintillometer manual use the information below to identify and solve the problem. -
Page 31: Customer Support
9 CUSTOMER SUPPORT If you require any support for your Kipp & Zonen product please contact your local representative in the first instance. The information can be found in the ‘Contact’ section of our website at http://www.kippzonen.com/Contact Alternatively, you can contact us directly at support@kippzonen.com Please include the following information: ... -
Page 32: System Installation Form
SYSTEM INSTALLATION FORM Note As the final step we recommend filling in an Installation Form for the System). This information in this form will be used to configure the EVATION software. General Information Date: …………………… [Year/Month/Day] Installed by: …………………………………………… Station name: ……………………... -
Page 33: Las Mkii Scintillometer
LAS MKII Scintillometer Scintillometer Serial number : …………………… Exact path length (according to GPS or map): …………………… [m] Transmitter Coordinates of LAS MkII transmitter: …………………… [Latitude, …………………… [Longitude, …………………… [Height, m] (above ground) …………………… [Elevation, m] (above sea level) Power adjustment setting: ……………………... -
Page 34: Effective Height Of Las Mkii Scintillometer
Effective Height of LAS MKII Scintillometer The accuracy of the fluxes of sensible heat and evapo-transpiration depends strongly upon the mean height of the LAS MkII optical beam above the surface. In case the area is completely flat the average beam height can be easily derived from the transmitter height and the receiver height. - Page 35 The effective height of the LAS beam can then be calculated as shown below. Beam Receiver Transmitter 6 7 8 ’Reference’...