TRIME-FM - Earth Observing Laboratory
Contents
1. If you use it on DC you have to connect the provided DC cable to the cigarette lighter Note In passenger cars 12 16 V DC only 4 to 6 cells battery packs 4 8 7 2 V can be charged In trucks 24 32 V DC you can charge 4 to 10 cells battery packs 4 8 12 V Environmental reference Rechargeable batteries are not to be disposed in domestic waste Surrender used batteries to your dealer or rather to the battery collecting point 222. FM should measure automatically The cyclic measuring mode mode C can be set by the program TRIMESET whereas the cycle time can be chosen 1 1 9 PC Connection via RS232 The TRIME FM can be connected to a PC via the RS232 connector and the appropriate cable in order to carry out data logging changing the operating mode or calibration As long as the PC is connected the power off automatic is disabled to prevent switching off It is to be considered that the internal battery is discharged as long as the PC is connected 1 1 10 Power supply Supply current Technical Data Resolution Repeating accuracy Measurement range Temperature range Temperature caused value drift Standard interface Calibration Case 7V 15V DC 600 mA h battery capacity 8mA standby 200mA while 10 15sec measuring time 0 1 0 3 0 100 15 C 50 C expanded temperature ranges on request max 0 5 analogue output 0 1V or 0 4 20mA RS232 V24 IMP232 MICRONET calibrated for mineral soils but individually adaptable per software weatherproof robust aluminium die cast IP65 The measuring accuracy and range as well as the tolerable range of bulk electrical conductivity depends on the corresponding probe AGISTURE 21 4 TOR LEVEL 64 STATUS BATTERY Connector for analogue cable Calibration plug battery charger Pin 1 Reserved Pin 2 Reserved Pin 3 Analog Out 0 1V Pin 4 An
3. and when drilling under very dry conditions For these soils other drilling methods are recommended e g pre boring with an Edelman auger washing mud into the cavity around the tube Losses in accuracy must then be accepted and measurements immediately after installation are not recommended Problems can also arise in swelling and shrinking soils since cracks develop especially along the access tubes 2 3 Measuring experiences The new TRIME technique was thoroughly tested in the field and compared both to neutron probe measurements and thermo gravimetrically determined values Gravim Water Content Vol 0 10 20 30 40 50 TRIME Water Content Vol Figure 3 Comparison of TRIME measurements and gravimetric water content determination for a clayey soil Figures 5 and 6 show a comparison of water content determinations for a loess and for a heavy clay made with a neutron probe Wallingford the TRIME T3 probe and the gravimetric method In contrast to the neutron probe which is not suitable for measurements near the surface due to radiation losses to the atmosphere TRIME has no problem at all to measure directly at the soil surface 10 IMKO y MICROMODULTECHNIK GMBH Water Content Vol Neutron probe 5 TRIME probe Gravimetric Figure 4 Comparison of neutron probe TRIME T3 and gravimetric method for water content determinations in a loess soil Water Content Vol 10 20 30 40 50 60 de
4. TRIME FM User Manual i a ee p TRIME FM i x IMKO MICROMODULTECHNIK F GMBH Thank you for buying IMKO Should you have any queries please don t hesitate to contact your local distributor or address directly to IMKO Micromodultechnik GmbH Im Stoeck 2 D 76275 Ettlingen Germany Phone 49 7246 5921 0 Fax 49 7246 90856 e mail info imko de internet http www imko de as of April 15 2001 Table of contents 1 TRIME FM2 FM3 Field Measurement Device Version P2 or P3 3 1 1 Functional Description 3 1 1 1 Manual Operation 3 1 1 2 Probe Connection 3 1 1 3 Basic Alignment 3 1 1 4 Display Functions Error Messages 3 1 1 5 Battery Operation 4 1 1 6 Battery Charger 4 1 1 7 External Power Supply 4 1 1 8 Data Logger Operation 4 1 1 9 PC Connection via RS232 4 1 1 10 Technical Data 5 1 2 Probe Dimensions 6 1 3 Preparation Rods 7 1 4 Mounting of Spare Rods with O ring Seals 8 2 The TRIME T3 Tube Access Probe 9 2 1 Introduction 9 2 2 Measuring Field 9 2 3 Measuring experiences 10 2 4 Summary 11 Access Tubes and Augers 12 Instructions for Access Tube Installation 13 4 1 Fixing of the rubber bung 13 4 2 Inserting T3 into the TECANAT tube 14 5 Basic Alignment with the Calibration Set 15 5 1 What is abasic alignment 15 5 1 1 What are the benefits of the calibration set for the user 15 5 2 How to make the basic alignment 16 5 2 1 Preparation of the glass beads 16 5 2 2 Basic
5. able top of at least 10cm The probe must now be stuck vertically into the dry glass beads Both container and TRIME instruments shouldn t touch metal objects too Now knock laterally to the container to achieve that the glass beads fit closely to the probe rods Then start the first measurement by pressing the START button After the measurement is finished the second reference value is displayed e g 43 8 The probe has now to be stuck into the water saturated glass beads As described above please take care that the cable is not in contact with metal objects and itself The probe rods must be completely and vertically inserted into the glass beads The cable must not put force on the probe Knock slightly laterally to the container for a close fitting of the glass beads to the probe rods Now start the second measurement by pressing the START button After the measurement time has expired and the calibration is completed and the next probe can be calibrated If you want to terminate the calibration work remove the calibration connector To check the calibration success measure in dry and saturated glass beads and verify the results with the reference values The calibration would have to be repeated if the deviations are too great 16 JE IMKO MICROMODULTECHNIK F GMBH STEP LIST BASIC ALIGNMENT Connect the probe P3 etc to the TRIME FM Press button for switching on the TRIME FM Display shows TRIME System Software V
6. alignment procedure 16 EMV EMI Precaution 18 7 Instructions for Wiring 19 7 1 Water tight connectors and cable confection for use with the environmental measurement system ENVIS 20 8 Operating instructions ACS series 21 1 TRIME FM2 FM3 Field Measurement Device Version P2 or P3 1 1 Functional Description The TRIME FM is a portable moisture measurement instrument which has been developed for mobile field use It can additionally be supplied with an external power supply It is connectable to a data logger or a PC for automated data logging 1 1 1 Manual Operation The manual operation is very easy Pressing the START button switches on the TRIME FM Pressing the button once again starts the measurement The message Measuring disappears after about 10 seconds and the measured values of the water content and the TDR level are displayed on the first two lines The TDR level can be used to assess the electrical conductivity of the soil or material The instrument switches off about three minutes after the last operation in order to save battery power 1 1 2 Probe Connection There is a build in non volatile memory EEPROM inside the probe connector where all calibration data is stored e g cable length probe geometry and calibration coefficients Therefore several probes can be used with the same TRIME FM It is possible to connect probes with different cable lengths and different calibration data according to the device
7. alog Out 0V Pin 5 SelfCal Pin 6 R T IMP Bus Pin 7 COM IMP Bus 60 ol TRIME FM front view MICROM ODS LTZCIINIK GME Connectable probes for TRIME FM2 Coax cable Probe Probe Probe Probe P2G P2Z P2 P2D TTV Probe connector Connectable probes for TRIME FM3 Connector for id external power supply Probe Probe Probe Tube Probe oto RS232 V24 P3 P3Z P3S T3 front view Pin 1 U 9V 15V DC max 250mA Pin 2 RxD Pin 3 ah Battery charger Sy of Sa i oO I T A roi PR external battery AC banana plugs Wz CaS l box AC Connector MILL MM ILL IEE MILIEU IL T MUT LIE IIE MMMM IL IL IL DUMM HH HH HM AIL ILL 1 2 2 Rod Probe P2Z u Q CO 160 o Rod diameter 6mm 3 Rod Probe P3Z Oo 160 o 100 Tanner arrangement Probe Dimensions 2 Rod Probe P2G 88 40 6 Rod diameter 6mm 3 Rod Probe P3 30 160 All pins can be replaced 15 115 2 Rod Miniatur Probe Probe P2 P2D With screw 2 32 for optional tube extension oO LO To oO ooo LO CO rr Oo Different length 50 80 100mm Rod diameter 2 4mm Rod diameter 3 5mm 3 Rod Probe P3S 30 wz 110 Pe Rod diameter 3 5mm Ww for tube g ext
8. approximate measuring volume The elliptical measuring volume enables a higher representation to be achieved by several measurements rotating the probe after each measurement and calculating the mean value The following experiment illustrates the high penetration depth of the measuring field In a bucket of 50 cm diameter filled with water saturated glass beads a moisture of 44 vol is measured Measuring in a smaller bucket see Fig 3 would result in essentially lower measuring values due to an amount of air within the measured volume saturated glass beads with water content of 40 by vol smaller bucket reducing the measurement field measurement field plastic bucket Figure 2 Influence of a too small measuring volume on water content determination IMKO y MICROMODULTECHNIK F GMBH Note that the necessity of a close contact between access tube and material is vital for reliable measurements and that the tubes should be installed by our recommended method e For example at an assumed water content of 15 vol an air gap of 1 mm around the whole length of the tube would result in an underestimation of 1 2 vol e Atawater content of 25 vol the error would be 5 vol e At very high water contents 50 vol errors may reach 10 vol e Inthe case of a water filled gap under conditions of saturation the gap error would be much smaller Problems may arise however in very inhomogeneous soils
9. aution to remove air bubbles is to stir slightly while filling in the glass beads The container must now be knocked against the ground some times to achieve a constant density The surplus water must be poured out until the thickness of the water film above the glass beads is below 2mm The water saturated glass beads should be in a temperature range between 20 C and 25 Please note that the electrical conductivity of the water saturated glass beads medium increases already after a few days storage Therefore the glass beads must be washed again before the next calibration 5 2 2 Basic alignment procedure The basic alignment can be done with both the calibration connector only TRIME FM and the calibration program SMCAL please read the information about the basic alignment with SMCAL in the file README TXT in the subdirectory BASICCAL of the SMCAL disk Only the procedure with the calibration connector is described in the following Before starting the essential calibration connect the probe to the TRIME FM and press the START button to switch on the instrument After this dummy measurement is finished you can plug in the calibration connector at the side of the TRIME FM The display shows the first reference value of dry glass beads for the appropriate probe e g 2 8 The probe cable must now be unwound and spread out in a way that the cable doesn t touch itself Moreover it must have a distance to metal objects e g metal t
10. by plugging the calibration connector Please refer to the chapter Basic alignment with the Calibration Set A calibration for a specific material cannot be established by using the calibration connector 1 1 4 Display Functions Error Messages The LC display of the TRIME FM has four lines with 20 characters each Almost all messages which can be displayed are changeable that means they can be translated to the desired language The modification of the texts can be done by the program TRIMETXT Generally the third line is used to display status and error messages It indicates whether measuring is active or the battery is just being charged or discharged Occurred errors are indicated with error number and address Error numbers between 1 and 29 are internal errors which are displayed without additional text TDR may be defective TDR electronic or probe cable defective 31 TDR level not found TDR level searching lasted too long may occur with bad signal quality due to conductive soil or material 1 1 5 Battery Operation The internal chargeable battery has a capacity of 600 mAh which allows about 300 measurements This is only an approximate value and dependent on a lot of influences like ambient temperature pauses between the measurements measured material and age of the battery The measuring operation should be terminated as soon as the error message Battery is empty appears If the battery capacity is not suf
11. e calibration data for this data set and to download it into the TRIME probe you need the calibration program SMCAL IMKO y MICROMODULTECHNIK GMBH 5 2 How to make the basic alignment 5 2 1 Preparation of the glass beads First the glass beads which are supplied with the calibration set have to be prepared The preparation of the dry glass beads is uncritical Fill up one of the containers until the rods of the probe could completely be inserted To achieve a constant density knock the container several times against the ground After a long usage of the glass beads the density increases Therefore they should be poured out into another bucket and poured back to achieve the original density The preparation of the water saturated glass beads is more critical because water dissolves Na2O and K O from glass This causes a rising pH value and an increased electrical conductivity This property is most intensive with new glass beads Therefore the glass beads should be washed intensively with tap water in a large container e g 10 litre bucket Fill a bucket with water stir the beads under water and then pour out the water This procedure should be done at least five times each time with fresh water Ifthe glass beads have been in use for a longer time three times is enough Now the second calibration container has to be filled with water in order to be able to fill in the glass beads without remaining air bubbles An additional prec
12. e screw auger with handle clamp device for the rubber bung and an internal steel guide protection tube Deliverable is a small version without soil anchors for setting of glass fibre tubes with 1m length A steel cutting shoe is glued into the access tube The screw auger that moves easily within the guide tube is used to drill out soil to about 0 1m below the cutting shoe Depending on soil homogeneity the tube can be hammered 5 10cm into the soil This cycle is repeated until the tube is fully installed The internal protection tube is then removed and the access tube can be sealed by a rubber bung 12 IMKOy MICROMODULTECHNIK GMBH 4 Instructions for Access Tube Installation The following instructions should be taken account of Ramming Head Fixation with Clamp Device Screw Pull for best position Plastic Inlet Internal Steel Guide and TECANAT Protection Tube Access Tube 0 6m 1m or 2m long os Steel Cutting Shoe of Access Tube 4 1 Fixing of the rubber bung The ramming head the TECANAT access tube and the internal steel guide and protection tube are one unit The internal protection tube has to lie on the cutting shoe of the access tube before it can be fixed with a screw to the ramming head This fixation is necessary to secure the shoe against being squeezed out by the returning force of the hammer blow The access tube however is fixed to the ramming head b
13. e against rain 13 MICROMODULTECHNIK GMBH 4 2 Inserting T3 into the TECANAT tube When you are going to work with your TRIME T3 tube access probe Press the spring mounted wave guides to the probe body when you insert the T3 probe into the tube Thereby you avoid ripping off the spring mounted wave guides able ook K 0 S dp OD os Ben k A TRIME FM3 or TRIME IPH Se SENER TECANAT plastic tube T 3 Pa Vee N en A 7 N 7 2 ee a t z m ae gt Please note Should you use new T3 probes eight wave guiding plates instead of two in old GFK tubes we advice to carefully chamfer the inner top side of the GFK tube Thereby you avoid ripping off the spring mounted wave guides Please note With the T3 comes three aluminium rods which can be screwed together They can be used to orientate the T3 probe in the borehole IMKOy MICROMODULTECHNIK GMBH 5 Basic Alignment with the Calibration Set Coax cable TRIME Probe ae water ER dry glass saturated beads glass beads Calibration Connector 5 1 What is a basic alignment The basic alignment serves to compensate the cable length and tolerances of the probe mechanics thickness of the rod coating rod length etc After two measurements one in dry and one in water saturated glass beads the calibration data is calculated and stored in the TRIME probe s connector Every TRIME probe must be calibrated before i
14. ension A 1 3 Preparation Rods For the protection of the rod tips it is necessary to use the preparation rods for probe P2 P2Z P2G and P3 A defect and blank rod is sensitive against electrostatic charge and can destroy the electronic 1 4 Mounting of Spare Rods with O ring Seals 4 put silicon grease to the threads of the rods new spare rod are greased at works 5 screw the rods into the probe body 3 push the seals to the basis of the borings where the threads begin IMKOy MICROMODULTECHNIK GMBH 2 The TRIME T3 Tube Access Probe 2 1 Introduction The measuring of soil water content with Time Domain Reflectometry is now a well established method However water content profiling is not possible with conventional TDR rod probes The TRIME tube probe was developed for this reason Since 1994 the TRIME T3 has found numerous applications in earth and environmental sciences fulfilling even the most exacting requirements 2 2 Measuring Field The effective penetration depth of the probe is about 15 cm with the highest sensitivity in the immediate vicinity of the access tube and decreases exponentially with distance Figure 3 shows the electric field distribution of the probe and the approximate measuring volume p lt a Z p gt effective measurement volume i Q 1 1 LJ equipotential lines aluminum plates Figure 1 Electric field distribution of the TRIME probe and
15. ersion 2 3 SN XXXX serial number of the TRIME FM Connect the calibration connector at the 7 pin flange connector of the TRIME FM Display shows BASIC CALIBRATION Ldry glass beads Reference 2 9Vol Put the P3 probe into your dry glass beads read Preparation of the glass beads p 16 Press button for starting the measurement Display Shows 1 BASIC CALIBRATION Ldry glass beads Checking TDR Cir cuit Display shows 2 BASIC CALIBRATION L dry glass beads Measuring Display shows 3 BASIC CALIBRATION 2 sat glass beads Reference 43 Vol Put the P3 probe into your saturated glass beads Read the description of the TRIME FM user manual too Press button for starting the measurement Display shows 1 BASIC CALIBRATION 2 sat glass beads Checking TDR Cir cuit Display shows 2 BASIC CALIBRATION 2 sat glass beads Measuring Display shows 3 BASIC CALIBRATION Ldry glass beads Okay next probe Reference 2 9Vol Probe is calibrated You can connect the next P3 probe for calibration begin with step CJ You finished calibration work Then unplug the calibration connector 17 IMKO y MICROMODULTECHNIK F GMBH 6 EMV EMI Precaution EMV EMI precaution by means of ferrite filters ensures better disturbance suppression Ferrite filters are clipped to both ends of the probe cable They are important for an improved measurement accuracy EMV EMI Ferrit Filter q a snap
16. ess tube and decreases exponentially into the medium Therefore the insertion method of the access tube is very important Small version nl para without soil S anchors for a access tubes Pre boring Fixing Be UDE with 1m length with an of the Ramming head lt BARK FR Edelman rubber with clamp device ee i auger bung X a BE gt TECANAT a Pa Auger access ae F equipment for Se the direct setting of the access tubes into x homogeneous I Support soils pillar with clamp device ancho Internal NEN SS steel guide i and P a protection a gt tube am gt o ik le evice D i B R OP 9 af for gt d rubber o 2 A oS bung 7 i T Steel cutting shoe z ee Q O ze of access tube Pre boring of bore holes with standard augers destroy the soil texture because it is difficult t0 come to a good and close contact of the access tube inside the soil With the described auger equipment it is possible to set the access tubes directly into homogenous soils without pre boring In very stony soils it is not possible to use this method Therefore it could be possible to use an Edelman Auger for pre boring and closing the air gaps with mud Changes in soil structure and a delay time up to 4 weeks before it is possible to come to precise measurement values must then be accepted The IMKO auger equipment consists of access tube support pillar with three soil anchors ramming head with clamp devic
17. f the distribution modules by yourself please make sure that the cable seals fit tightly Only cables with a sheath diameter of 5 to 8mm should be used In case of smaller diameters water may enter the connector the distribution box or the measurement device and may alter measurements or even destroy the equipment IMKO supplies special seals 2 All unused connectors have to be protected by blind covers IMKO supplies all equipment respectively all open connecting terminals protected by blind covers Additional ones can be obtained by IMKO 3 When installing the connectors special attention has to be paid to the connectors being threaded with care The threads have to be aligned correctly to ensure efficient tightness In addition the connector should only be hand screwed i e without use of tools e g pliers A thin coating of grease should be applied to the threads of the threaded ring and to the connector socket in order to ensure easy removal even after long periods of use 20 MICROMODULTECHNIK GMBH 8 Operating instructions ACS series Use of the charger Automatic charger discharger for 4 10 cells nickel cadmium and nickel metalhydrid battery packs 4 8 12 0 V with a capacity of 500 5000 mAh ACS 410p traveller 800 9 000 mAh Features e Micro controller controlled charging Test phase at the beginning of the charging in order to recognize and indicate defect battery packs Short circuit detection and electronic pro
18. ficient or battery operation is not desired at all an external battery or power supply may be connected via the RS232 connector Attention Charging is only allowed with the supplied ACS charger 1 1 6 Battery Charger The micro controlled charging method of the ACS charger guarantees an optimised battery lifetime 1 Regarding the battery lifetime the discharging mode is most favourable It is started by pressing the yellow button However it is not harmful for the battery to use the charging mode if the charging shall be carried out fast i e in up to 4 hours The discharging mode lasts between 6 and 7 hours The charger can remain connected as long as one likes The battery can not be damaged by it Please refer to the charger operating instructions on page 21 1 1 7 External Power Supply An external power supply 9 15V 300mA can be connected via the RS232 cable In this case the internal battery is disconnected and the instrument is supplied by the external power only It doesn t switch off then but remains on as along as the external voltage is connected Therefore the data logger operation requires an external power supply It is even possible to connect an external battery if the capacity of the internal battery is not sufficient 1 1 8 Data Logger Operation The TRIME FM comes with an analogue output of 0 1V in order to make data logging with external devices possible For this data logger operation the TRIME
19. om the mains when not in use Do not plug in the charger in case of damaged cabinet or power plug 21 MICROMODULTECHNIK GMBH Operation The charger starts charging automatically as soon as a battery pack is installed and the charger is plugged in Usually the battery packs are brought into contact by the plugs which are enclosed the supply If the red LED after the test phase about 10 seconds still keeps flashing check the polarity of the battery pack Please gather the changing of the polarity of the battery pack out of illustration No 5 If the red LED is flashing again after the test phase and does not switch over to permanent light for charging either the battery pack is defect or the battery pack might also not have the right number of cells less than 4 cells 4 8V or more than 10 cells 12 0 V The test phase is followed by the charging procedure red LED is permanent on After the charging procedure the charger switches automatically over to trickle charge green LED is flashing red LED is off The starting of the discharging procedure occurs by pressing about 2 seconds the button for discharging 3 However this discharging procedure should only take place after the test phase After discharging which can in individual cases last for several hours the charger automatically switches over to charging Use in motor vehicles and trucks only ACS 410 mobile The ACS 410 mobile can be plugged into a 12 32 V DC outlet
20. pth cm Figure 5 Comparison of neutron probe and TRIME T3 for water content determinations an illitic clay Some materials especially very clayey soils and soils with high organic contents can afford material specific calibrations due to their different dielectric behaviour A limiting factor in TDR measuring is the bulk soil electrical conductivity For the TRIME T3 tube probe bulk soil electrical conductivity should not exceed 1 dS m Note that bulk soil electrical conductivity is a combination of the pore water electrical conductivity and the surface conductivity of the soil matrix Due to the tortuous nature of the conductivity path in the soil soil type dependent the bulk soil conductivity is much lower than the electrical conductivity of the pore water and it is dependent on water content 2 4 Summary The TRIME tube probe is a promising new tool for determining water content profiles with the TDR method Fast routine and non destructive measurements of water content without the use of hazardous radioactive materials are possible A measuring accuracy of 2 vol is possible provided that soil and access tube are in close contact and bulk soil electrical conductivity doesn t exceed 1 dS m 11 IMKO y MICROMODULTECHNIK F GMBH 3 Access Tubes and Augers The penetration depth of the measurement field of the 44mm TRIME tube access probe is up to 150mm into the soil The measurement sensitivity is the highest near the acc
21. snap here here ZCAT 2035 rod probe tube probe 18 snap here A EM Ferrit Filter id ZCAT 1518 a TRIME FM Measuring Start SZ rmerm Analog BAR ersion f IMKO er 71 ON ZCAT 2035 U RS232 cable IMKO y Instructions for Wiring In diesem Bereich i Buchseneinsatz Geundenne einfetten female insert coupling ring In this area place a thin coat of grease H lse mit Feder Shell with spring i Dichtring T gasket 4 Laie aa me rl Druckring Druckschraube iL ve a E i a Ka k L thrust coilar pressing screw HERRE i il j nz S Dichtring a FPE 1 a gasket Fi Druckring j Piching T I 7 thrust coilar gasket i i Druckschraub am j ruckschraube i pressing screw rr i L El An den schwarz markierten Bereichen den Siliconkleber so dick auftragen da Dichtring und Kabel wasserdicht verklebt sind At the black marked areas apply silicon glue so thick O Ring that the gasket and the Gewindering coupling mng cable are sticked together and are waterproofed 19 IMKO y MICROMODULTECHNIK F GMBH 7 1 Water tight connectors and cable confection for use with the environmental measurement system ENVIS Dear Customer water tightness of the sensor modules IP65 and the connectors IP67 can only be guaranteed by observing the following 1 Incase of carrying out the cabling o
22. t can supply proper measurement results It is very important that the probe is calibrated with the device it belongs to This calibration is regularly done by IMKO before the delivery of new probes Please note that probes can only be used with the TRIME device they were calibrated with 5 1 1 What are the benefits of the calibration set for the user With the calibration set you can easily calibrate probes on your TRIME instrument by yourself The calibration set offers the following advantages to you 1 If defective probe rods must be changed you are able to make the required basic alignment by yourself You can calibrate probes purchased later with your TRIME instrument by yourself If you have two or more instruments you can change the configuration of instruments and probes anytime by a new calibration of the appropriate probes to the specific instruments You would have to send instruments and probes to us in any of the above cases where basic alignment is required if you have no calibration set IMKO will charge calibration costs Moreover you will save the forwarding charges and you will not have to interrupt your measuring campaign if you calibrate by yourself However the calibration set allows only to make a basic alignment of the TRIME probes You can not change the standard calibration for specific materials with it For this purpose a measurement data set must be created with this specific material In order to calculate th
23. tection against reversed battery Battery condition at the beginning of the charging is of no importance for the battery packs Supervision of the charging condition by a micro controller during the whole charging time safety stages like voltage gradient supervision and delta U switch off as well as a safety timer are integrated e possibility of discharging of the battery packs before use by pressing the button after that automatic switching over to the charging e automatic switching over to trickle charge e state indication through illuminated display LEDs Illuminated display red 1 the flashing of the red illuminated display can have different meanings 1 it signs the perfect contact of the battery packs during the test phase about 10 seconds 2 it signs that the battery pack is not connected properly with regard to the pole 3 it signs the defect battery pack or unsuitable amount of cells 4 it signs the discharging after pressing the PRESS button Permanent light signs the charging of the battery packs Illuminated display green 2 battery pack fully charged trickle charge Operating elements Discharging button 3 the discharging is started by pressing the PRESS button for about two seconds Attention Only charge rechargeable Ni Cd Ni MH battery packs By using other batteries there is BEIAK LAMM E mess eka Caution Keep your charger in a dry place indoor use only The charger should be disconnected fr
24. type P2 or P3 The device type P3 allows only the usage of P3 probes and P2 probes can only be connected to P2 devices Probes can only be used at the TRIME FM which they were basic calibrated with To prevent confusion each probe has a label with the serial number of the device which it was calibrated with To screw the probe connector on is only necessary if the instrument is exposed to the weather For manual measurements with several probes it is recommended not to screw on the coupling ring in order to be easy on the thread The insertion of the probes must be carried out very carefully in order to prevent air pockets around the rods or the access tube if the tube probe is used Therefore the insertion of the rod probes with the preparation rods is only recommended if it is not possible to stick them in manually Repeated insertion in the same holes is not recommended too The access tubes should be inserted with our auger equipment Since the highest measuring sensitivity is directly around the rods or the access tube the TRIME FM would measure too low values if there was an air gap In water saturated soils the measured values would be too high The probe rods must be inserted in the soil completely because the probe measures along the whole length of the rods 1 1 3 Basic Alignment The basic alignment can be done without any connection to a PC and without the calibration program SMCAL The TRIME FM is set to the calibration mode
25. y the clamp device Both fixation screw and clamp device should be controlled during the installation process and be re adjusted with the adjustable levers if necessary The screw auger that moves easily within the guide tube is used to drill out soil to about 0 1m below the cutting shoe Depending on soil homogeneity the tube is then hammered 5 10 cm into the soil with a plastic hammer with open support pillar clamps The guide tube is not used for making the hole in the first instance because this could result in soil compaction around the hole which would lead to higher measurement values The access tube support pillar with three ground anchors avoids vibrations that would cause air gaps Then the clamp of the support pillar must be closed and the soil can be removed with the screw auger When the tube reach the support pillar it must be removed and the access tube can be inserted to the final depth without the support pillar The rubber bung can be pushed into the access tube with the screw adapter and the handle the screw adapter can be replaced instead of the screw auger and can be fixed at the bottom of the access tube with two turns of the handle If pushing down the rubber bung turns out to be difficult just apply some talcum powder on the rubber bung sides and into the access tube A plastic collar should be mounted around the tube to prevent water from running down the tube wall and a plastic cap to protect the tub
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