Raingauge - Ekotechnika
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1. User Manual for the Raingauge type RG2 RG2 UM 1 1 Delta T Devices Ltd Notices Copyright All rights reserved Under the copyright laws this manual may not be copied in whole or in part without the written consent of Delta T Devices Ltd Under the law copying includes translation into another language Copyright 2002 3 Delta T Devices Limited and Pronamic Co Ltd Patents This raingauge is protected by copyright law and the following patents Patent No UM 27589 AU Pat 565951 EPO Pat 014212 US Pat 4 644 786 CA Pat 126181 Japan Pat 501208 83 Taiwan Reg 74 201292 Components may not be used for other products or purposes without written approval from the manufacturer CE conformity The sensor described in this document is a passive component as defined by the EU EMC Directive 89 336 EEC and is not CE marked When used with Delta T logging systems according to the instructions contained in this document the sensor does not significantly affect the EMC performance when assessed under EN 50081 and EN 50082 If the sensor is used with any other measuring equipment it is the responsibility of the user to ensure the EMC compliance of any such measuring systems Design changes Delta T Devices Ltd reserves the right to change the designs and specifications of its products at any time without prior notice User Manual Version 1 1 May 2003 Delta T Devices Ltd Tel 44 1638 742922 128 Low R2. Repairs and Spares In cases of damage or wear some components are available as replacement parts Check with Delta T 18 Maintenance RG2 User Manual 1 1 Warranty and Service Terms and Conditions of Sale Our Conditions of Sale ref COND 1 00 set out Delta T s legal obligations on these matters Delta T warrants that the goods will be free from defects arising out of the materials used or poor workmanship for a period of twelve months from the date of delivery Technical Support Technical Support is available on Delta T products and systems Users in countries that have a Delta T Distributor or Technical Representative should contact them in the first instance Technical Support questions received by Delta T will be handled by our Tech Support team Your initial enquiry will be acknowledged immediately with a T number and an estimate of time for a detailed reply Make sure to quote our T number subsequently so that we can easily trace any earlier correspondence In your enquiry always quote instrument serial numbers software version numbers and the approximate date and source of purchase where these are relevant Contact details Tech Support Team Delta T Devices Ltd 128 Low Road Burwell Cambridge CB5 OEJ U K email tech support delta t co uk Web site www delta t co uk Tel 44 0 1638 742922 Fax 44 0 1638 743155 RG2 User Manual 1 1 Warranty and Service 19 Troubleshooting Problems Al
3. ally open NO contacts the second with normally closed NC contacts 1 kQ resistors are fitted in series with each switch Use only the NO terminal connections 3 and 4 for the Delta T DL2e data logger ee Switch NO 1 kQ resistor in series with switch contacts inside the RG2 Either Switch NO Common Switch NC e o used Common Soen Ne 10 RG2 Sensor Connections RG2 User Manual 1 1 Cable Up to 100m of cable can be fitted at time of ordering Cable can be extended with similar cable provided the joint is waterproof up to the 100 metre limit Data Requirements Typical common usage Rainfall amount Log hourly or daily totals in mm of rain Rainfall intensity Log totals more frequently e g at 1 or 5 minute intervals RG2 User Manual 1 1 RG2 Sensor Connections 11 Logger Connections DL2e Logger Use with DL2e Counter Channels This diagram shows the wiring connections for the DL2e onboard counter channels 61 or 62 For the DLC1 Counter Card follow identical principles and refer to the DL2e Logger Documentation and Ls2Win on line Help RG2 Wiring Schematic for DL2e OOOOCOCOOODO Note cable polarity is not important Switch NO either Switch Common either OOOOOOOOOO 12 Logger Connections RG2 User Manual 1 1 Settings The example shows the RG2 sensor output connected to counter channel number 61 in the DL2e logger Either wire can be connected to the channel input termin
4. als The cable polarity is not important DL2e Sensor Code RG2 When creating your DL2e logger program with the Ls2Win software check the sensor library for the RG2 code If the RG2 sensor code is already present you can use it in your logger program with any of the two on board counter channels or with channels on the DLC1 Counter card Then choose suitable logging sampling and logging intervals see data requirements in your logging program If the RG2 code is not present in your sensor library you must first import it from a sensor library of additional sensor codes provided by Delta T Check with Delta T for the latest version of the Ls2Win software and sensor libraries Note If your Ls2Win sensor library does not contain the RG2 code you can use the RG1 code instead It will give correct results Other Loggers For making connections to other data loggers please follow the general principles laid out above RG2 User Manual 1 1 Logger Connections 13 Specifications RG2 Specification Table Rainfall intensity range Signal type Reed switch closure NO or closed NC Operating time NO 255 ms NC 190 ms environmental conditions Funnel diameter 159 6 mm inside 165 mm outside Weight excl cable RG2 BP Baseplate Material Weather resistant 6 mm white Foamex Dimensions 300 x 200 mm Raingauge attachment M4x16 screws and nuts 4 off Ground fixings Ground spikes 200 mm 4 off 14 Specification
5. matically tips everytime there is exactly the specified weight of water in it The raingauge consists of three main parts e the funnel collector push fit attachment to base e the base box e the measuring spoon assembly Full internal construction details are give in the section on Specifications Mounting the Sensor Mounting Considerations The RG2 is supplied with aluminium angle brackets to fit the box at the base of the unit You can use these to mount the raingauge on any suitable horizontal surface Four M4 mounting holes at 30 mm x 138 mm rectangular pitch spacing are provided by the angle brackets Ground mounting is generally preferred It is scientifically accepted that a raingauge mounted at 1 5 m above ground will collect about 7 less rain than an identical unit mounted on the ground Mount the raingauge with its axis vertical Small deviations from the vertical will not significantly affect the accuracy of rainfall collection Use a spirit level across the top of the funnel to verify the alignment if necessary Note that water emerges from the slots in the base during rainfall Warning Do not block the slots in the base of the unit Take care to prevent blockage by insect or leaf debris RG2 User Manual 1 1 Installation 7 Baseplate type RG2 BP This is a rectangular Foamex plate of durable plastic for mounting the raingauge on the ground Attach the raingauge to the base plate holes countersunk u
6. n 2 Recalibration You can check the calibration and adjustment of your RG2 as follows e Weigh or measure exactly 0 5 litre 500 ml or 500 g of water e Drip the water slowly into the funnel over a period of about 30 minutes e Check the number of tips registered with an appropriate measuring device connected to the RG2 cable The correct value is 125 tips e Turn the adjustment screw clockwise to increase the number of tips or anti clockwise to decrease the number Do this by small amounts and repeat the test after each adjustment Rainfall Intensity Response Note that in circumstances where the rainfall rate is very high the rain amount registered is slightly less accurate as shown by the chart below This is a common feature of raingauges employing tipping spoons or buckets and is not usually a significant factor Figure 1 Intensity curve 0 20 mm imp Input mm min per rm Measured 5 Measured mm min RG2 User Manual 1 1 Specifications 17 Maintenance Routine Maintenance Mostly these are practical considerations e Remove accumulations of leaves or vegetation material from the funnel and its grill e Remove the funnel and inspect the spoon mechanism Clear the slots in the base of the unit to allow measured rain to escape e Check that the raingauge remains mounted vertically e Check the calibration from time to time as described above
7. nderneath using four countersunk screws and nuts provided 300 6 P Secure the baseplate to the ground or soil with four spikes using the corner mounting holes Finally make sure the raingauge is vertical 8 Installation RG2 User Manual 1 1 Mast Mount type RG2 M This mount can be used on the Delta T M2 Mast or S Pole using the U bolts provided In fact it can be attached to almost any vertical or horizontal pole with a diameter in the range of 30 to 50 mm The raingauge centre line is positioned approximately 250 mm from the centre line of the mast 223 Mes 305 2 80 Use the small amount of play in the U bolt fittings to ensure that the raingauge is mounted vertically even if the support poles are not perfectly aligned A typical requirement is to mount the top of the funnel 1 5 m above the ground level As far as possible make sure that the raingauge does not shield other sensors on the mast for example wind sensors and is not itself shielded from receiving rainfall RG2 User Manual 1 1 Installation 9 RG2 Sensor Connections Outline Specs Output sensitivity 0 2 mm rain per tip contact closure Sensor Wiring The raingauge is fitted with 6m of 2 core cable with bare wire ends as standard The cable cores may have a variety of colours The switch wiring polarity is not important Two reed switches are fitted one with norm
8. ns the specifications and performance of the RG2 and describes its installation with Delta T data loggers You may also need to refer to the Delta T logger User Manual or On line Help RG2 User Manual 1 1 Introduction 5 Installation Unpacking Check for any damage that may have occurred to the consignment in transit Check that the contents of the consignment agree with the Packing List If any damage or shortage is apparent notify the distributors and the carriers immediately Make a note of the sensor s serial number s and check that the cable supplied is the length that was ordered The serial numbers will be needed in any subsequent warranty claims repairs or recalibration The parts supplied may include e RG2 raingauge fitted with the length of cable you ordered including angle brackets e Baseplate for ground mounting e Mast mounting bracket Description of Equipment Outline Diagram Orifice 200 cm2 Inside diametre 159 6mm Outside diametre 165mm ee ww OO WwW GGZ wui Gg 100 mm 6 Installation RG2 User Manual 1 1 The raingauge collects rainfall in the funnel which leads the water down through a grill into a self emptying spoon The spoon is held in place by a magnet which always exerts enough tension to allow the measuring spoon to empty in one quick movement lt 300 ms and then to return to its original position to collect more rain The spoon auto
9. oad Burwell Fax 44 1638 743155 CAMBRIDGE CB5 OEJ e mail sales delta t co uk U K www hitp www delta t co uk Contents Introduction Summary of Features Scope of This Manual Installation Unpacking Description of Equipment Mounting the Sensor RG2 Sensor Connections Outline Specs Sensor Wiring Cable Data Requirements Logger Connections DL2e Logger RG2 Wiring Schematic for DL2e Other Loggers Specifications RG2 Specification Table RG2 BP Baseplate RG2 M Mast Mount Detailed Construction Calibration Rainfall Intensity Response RG2 User Manual 1 1 NYUACQK OH nana Gi 10 10 10 11 11 12 12 12 13 14 14 14 15 15 16 17 Introduction 3 Maintenance Routine Maintenance Repairs and Spares Warranty and Service Terms and Conditions of Sale Technical Support Troubleshooting Problems 4 Introduction 18 18 18 19 19 19 20 20 RG2 User Manual 1 1 Introduction Summary of Features The RG2 raingauge is a professional quality raingauge for ground level or mast mounting with the following features e Patented tipping spoon mechanism e Scientifically designed rain collector funnel e Precipitation measurements to 2 accuracy e Self emptying and frost proof e Styrosun material gives UV heat and frost resistance in all climatic conditions e Standard line replacement item e Ideal for agro meteorological uses Scope of This Manual This manual contai
10. s RG2 User Manual 1 1 RG2 M Mast Mount Mast to gauge distance Approx 250 mm between centre lines Stainless steel 2 0 mm Mast fixings U bolts for mast dia 30 50 mm 2 off Raingauge attachment M4x16 screws and nuts 4 off Detailed Construction Tipping Spoon Mechanism Self emptying spoon Printed circuit board with reed switches Retaining screw Magnet Adjustment screw Angle brackets Holder for spoon Drip catcher Soe RG2 User Manual 1 1 Specifications 15 Section Diagram 9 Funnel with grill 10 Retaining screw 11 Box for measuring unit 12 Measurement unit 13 Angle mounting screw holes x 4 14 Angle fixing screws x4 15 Angle brackets x2 16 Base with grooves for water outlet Calibration Different countries have different standards for rainfall measurements and raingauge testing The RG2 design has been thoroughly tested at the Danish Ministry of Agriculture Dept of Agricultural Meteorology Factory calibration is carefully made using the adjustment screw located beneath the spoon item 5 see above The adjustment screw is sealed with red compound indicating that the adjustment is correctly set for the parameters below Calibration Certificates for individual RG2 raingauges are not issued 16 Specifications RG2 User Manual 1 1 Resolution of the rain collector 0 20 mm per tip Number of tips for 0 5 litre Precipitation in mm rain for 0 5 litre Accuracy of setting Withi
11. ways try to isolate the source of the difficulty This may fall into one of the following areas The Raingauge e ls the rain getting to the spoon e Is the spoon tipping e s the tip action creating a switch closure pulse The Cable e Check for cable damage or connection faults short circuits or open circuits The Data Logger e Check that the data logger channel in use is correctly configured counter channel for switch closure pulses e Remove the raingauge connections and connect a manually operated switch instead to check the channel Doubtful Readings e First check all the above then do a recalibration check Symptom Possible cause or remedy No output from RG2 raingauge Check the RG2 tipping spoon mechanism Zero or low rain readings Broken cable or intermittent open circuit between sensor and logger Wildly variable or high rain Intermittent short circuit in cable readings between sensor and logger RG2 rain amounts appear Recheck the calibration incorrect 20 Troubleshooting RG2 User Manual 1 1
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