User Manual - manuals.decagon.com
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1. tensioLINK bus interface to create a network connectable to a digital logger channel Please read the separate instruction for the tensioLINK amplifier Signal incline of a D6 with tensioLINK amplifier Growth in mm 0 10 20 30 40 50 60 Signal in mV 0 170 340 510 680 850 1000 Status July 2012 11 16 Sensor connection 4 3 1 channel tensioLINK bus module Please read the separate instruction for the tL bus module with descriptions of programming the module measuring interval data upload and using all bus and interface functions Normally the D6 cable is already connected when delivered and the module is pre set to read the D6 Wiring scheme i green red black white toot On channel 2 a further sensor can be connected single ended or resistance for example a temperature probe internal or external Important after installation of the sensor and to start the logging it is necessary to synchronize date and time and to enter a logging interval Reasonable interval for D6 is 10 minutes Check if data is recorded before you leave the site Regularly upload the data and check the battery voltage 12 16 Readjust the measuring range UMS 5 Readjust the measuring range The D6 can measure a circumferential growth up to approximately 50 mm The end of the measuring range is reached when the spring tension gets too high To readjust the sensor open the small head2. C 16 16
3. around the trunk and through the other eyelet The spring must have enough initial tension the tension must be high enough that the sensor is pressed onto the Teflon pad The gap between the two aluminium blocks should be about 4 to 5 cm Place the sensor into the centre of the Teflon pad Clamp a wire end sleeve on the end of the cable or attach a piece of tape to prevent that the cable wires untwist 3 3 Pull relief for the signal cable The signal cable should not just hang down as then the sensor might be pulled out of its position Use a cable tie to fix the cable to a branch or a pole 10 16 Sensor connection UMS 4 Sensor connection 4 1 As full bridge D6 can be connected to a logger which is capable of reading a ratio metric voltage from a strain gage full bridge The resolution depends on the max resolution of the logger The logger resolution must be high enough to resolve the small signal changes Bridge specifications and signal characteristics in chapter 7 Full bridge scheme red green Strain gages white black Screen 4 2 tensioLINK amplifier The amplifier is electronically identical with the amplifier which is integrated in for example in T8 Tensiometer The same functions are available which are for example Amplified voltage output 0 1 V 0 2 V or 0 5 V can be changed with the tensioVIEW software and a USB converter
4. 4 UMS measure to know User Manual D6 Dendrometer D6 with tL UM tensioLINK module UMS GmbH M nchen Art Nr D6 Version 05 2010 Author ma Introduction Content 1 Introduction 1 1 Safety notes 1 2 Guarantee 1 3 Content of supply 2 Product description 2 1 Measuring principle 2 2 Construction 2 3 Sensor slope 2 4 Weatherproofness 2 5 INVAR girth cable 2 6 Teflon bark layer 3 Installation 3 1 Teflon net and plate 3 2 Sensor and steel cable 3 3 Pull relief for the signal cable 4 Sensor connection 4 1 As full bridge 4 2 tensioLINK amplifier 4 3 1 channel tensioLINK bus module 5 Readjust the measuring range 6 Protecting the site 6 1 Theft and vandalism 6 2 Forest inhabitants 7 Appendix 7 1 Technical specifications 7 2 Signal characteristic 7 3 Wiring scheme 8 Your addressee at UMS O WMDAOANA A AUO O 2 16 Introduction UMS 1 Introduction 1 1 Safety notes Electrical installations must comply with the safety and EMC requirements of the country in which the system is to be used Please note that any damages caused by handling errors are out of our control and therefore are not covered by guarantee Lightning Long cables act as antennas and might conduct surge voltage in case of lightning stroke this might damage sensors and instruments Electronic installation Any electrical installations should only be executed by qualified perso
5. ed E 4 o Dana S ep E S eee Eee eel S aa Es Pa a a o 2 f a os TES A Ft 4 8 3S ia A eL al A oO SL EZE 5 53 1 co o N o o Left Circumferential variations of a fir tree with largest extent before sunrise shrinking during the day Dry period from 3 8 to 6 8 and rising extent caused by rainfall starting on 7 8 9 8 10 8 11 8 7 8 8 8 6 8 5 8 4 8 Datum Umfangsschwankungen mm Right Circumferential variations from August to October with measuring interval 30 minutes 28 10 14 10 28 9 14 9 14 8 28 8 Datum 6 16 Product description UMS 2 2 Construction Clip sensor Signal cable eo INIT Teflon plat aT eflon plate Meme a ae Teflon net ST TTEA LE Scheme of the installed D6 Four strain gages wired as a Wheatstone full bridge are appliqued in the apex of the metal strip on the upper and bottom side By this the temperature elongation of the metal strip is compensated The sensor works as a beam in bending Changes in the bending cause a measurable change in the resistance of the strain gages Due to the stiffness of the material and the small dimensions of the strain gages this is quite linear in the finite range of the apex The strain gages are applied when the metal strip is flat Then the signal is zero and rises the more the strip is bended Therefore the output signal is t
6. he highest at the beginning of a measurement and decreases with on going growth This has to be considered when programming a data logger If the D6 is connected to a tensioLINK amplifier or tensioLINK module they have a configuration in which a growth is a positive signal 7 16 Product description 2 3 Sensor slope The signal response curve of the D6 has a negative slope The signal does not correspond to the circumference of the tree but indicates changes of the circumference For example a growth of 1 mm will lead to a decrease of the output signal by 0 6 mV with stabilised excitation voltage of 5 Vpc 2 4 Weatherproofness All parts are made of stainless material The strain gage bridge is temperature compensated Measurements when frost occurs are not reasonable The strain gages have a sealing which is absolutely watertight and stays lastingly elastic The watertight layer is a black polymer adhesive IP68 which remains sticky Thus a further red rubber polymer is applied Any gaps or holes in the red layer do not reduce the water tightness of the strain gage sealing 2 5 INVAR girth cable The girth cable is made of INVAR steel Unique feature of the material is a temperature elongation of less than 1 um per meter and Kelvin The cable is stainless though a nickel oxide layer will develop on the cable looking like rust and oxidation But this stain even makes the cable surface harder and acts as a furthe
7. ive incline AUm AL 0 13 mV mm x Us V With 5 V DC excitation voltage stabilised AUm AL 0 65 mV mm U V integer value of the applied excitation voltage e g Up V 5 for Us 5V 14 16 Appendix UM messure to know 7 3 Wiring scheme Only for 8 pin cable type CC 8 Connection scheme Configuration of 8 pin cable and plug Wiring connections Signal Wire Pin Function Vin white 1 Supply 6 18 Voc GND brown 2 Supply minus A OUT 1 green 3 Analog signal plus A OUT ellow 4 Analog signal minus Digital grey 5 Digital OUT RS485 A pink 6 RS485 A 2 wire RS485 B blue 7 RS485 B 2 wire A OUT 2 red 8 Analog output 2 SDI12 or SDI12 N oO WN lw Cut off not required wires or portect from short cut 15 16 8 Your addressee at UMS Sales and Dipl Ing Martin Naleppa technical support Tel 49 89 126652 14 Email mn ums muc de UMS GmbH UMS D 81379 M nchen massure to know Gmunderstr 37 www ums muc de Tel 49 89 126652 0 Fax 49 89 126652 20 Strictly observe rules for disposal of equipment containing electronics Within the EU disposal through municipal waste prohibited return electronic parts back to UMS R cknahme nach Elektro G WEEE Reg Nr DE 69093488
8. le by the charging level of the xylem or the swelling of the bark and are depending on the time of the day weather conditions humidity and temperature The transpiration over the leaves starting at sunrise leads to a reduction of the circumference Accordantly the stopping of transpiration after sunset leads to an increase of the circumference Both are measurable with the D6 dendrometer as well as variations due to dry periods or precipitation Trees can have daily variations of 0 5 mm to 2 5mm 4 16 Product description a UMS measure to know Further outstanding features of the D6 are the non destructive way of installation the nearly friction less conduction of the cable and the coverage of the complete circumference For a large scale determination of the wood increment it can be advantageous to additionally install D1 tree girth tape measures Tagesverlauf 20 7 07 3 6 Sun rise 3 5 3 4 Z 7 i Z T S F Reihe1 i l Umfang mm Uhrzeit One day variations measured with a D6 5 16 Product description 12 8 3 8 g E a S oL lil 4 O i E rer bests lead ee a Ie 7 4 PS oO F ecaa 4 s ol d 2 o N ET Sages ers cre Leen Geel Bae Pte S Ieee a a o 3 o A EE eae ee ee eter eL __ 3 bee eps erate e
9. less screws with a 1 5 hexagon key on the side where some additional cable is left Release some cable to relax the spring then tighten the hexagon screw again If the cable is crimped too much replace the cable 6 Protecting the site 6 1 Theft and vandalism A proper protection against theft and vandalism should be given for example by fencing or signs explaining the research project 6 2 Forest inhabitants The measuring setup should be protected from forest inhabitants A collar can keep mice from running up the tree Cables should be protected against rodent bites for example with plastic protection tubes Fix cables to branches or poles 13 16 Appendix 7 Appendix 7 1 Technical specifications Sensor Strain gage full bridge Measuring range 0 50 mm circumferential growth resettable Supply 5 15 Voc stabilised Bridge resistance 350 Ohm Max current burden 50 mA Non linearity 1 Reasonable min logger 5 um resolution Operating temperature gt 0 C Temperature resistance 30 C 50 C Temperature error lt 4 um K Sealing IP 68 Materials Aluminium stain less steel Teflon with supply voltage 5V 10V Measuring range for lt 50 mV to 0 mV lt 100 mV to 0 mV 0 50 mm growth negative incline Max signal to destroy the max 100 mV max 200 mV strain gages Estraing gage max lt 1 7 2 Signal characteristic Linearized negat
10. nnel 1 2 Guarantee UMS gives a guarantee of 12 months against defects in manufacture or materials used The guarantee does not cover damage through misuse or inexpert servicing or circumstances beyond our control The guarantee includes substitution or repair and package but excludes shipping expenses Please contact UMS or our representative before returning equipment Place of fulfilment is Munich Gmunder Str 37 3 16 Product description 1 3 Content of supply Delivery includes D6 clip sensor Teflon plate 16 5 x 3 cm Invar steel measuring cable length corresponding to tree circumference Teflon net length corresponding to tree circumference Per order 1 hexagon key size 1 5 Cable ties 4 per D6 Connection options Standard 4 pin cable 120 cm with free wires Fixed 4 pin plug M12 for connecting standard cables CC 4 tensioLINK amplifier fixed non detachable with D6 cable Available output tensioLINK bus or analog connectable with 8 pin cables CC 8 tensioLINK bus module stand alone 1 channel logger 2 Product description 2 1 Measuring principle The D6 Dendrometer measures the annual growth as well as diurnal circumferential variations with a high resolution provided that the connected data acquisition system offers a sufficient resolution Thus the total dimension change as well as the reversible variations can be determined Reversible variations are caused for examp
11. r anticorrosive protection 2 6 Teflon bark layer The friction of a wire or band with direct contact to the bark would prevent that small regression of the circumference are conveyed to the sensor With the Teflon net the circumferential measuring cable moves almost frictionless all variations around the complete trunk also from the opposite side of the trunk are conducted smoothly to the sensor 8 16 4 UMS Installation oaasuns than The net structure has further advantages The net adapts to the growth The tension of the cable is distributed evenly avoiding constriction The bark is not sealed off 3 Installation 3 1 Teflon net and plate Lead cables ties trough the holes on the Teflon pad and connect it with one end of the Teflon net Cut the net depending on the tree circumference lead it around the trunk and connect it to the other end of the pad Important Teflon net and pad must be fixed tightly with enough tension to stay in its position and to fit closely to the stem 9 16 Installation 3 2 Sensor and steel cable Lead the measuring steel cable around the trunk and cut it off with the required length The length should be 5 cm longer than the circumference to allow a readjustment of the cable when the end of the measuring range is reached Then insert one end of the cable into the eyelet on the Aluminium block and fix it with the screw requires 1 5 hex key Lead the cable
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