Manual - Specto Technology
Contents
1. N U SISGEO gt gt MEXID MINIATURE BOREHOLE EXTENSOMETER User s Manual MEXID miniature borehole extensometer INDEX Description Pag 4 Preliminary checks Pag 5 Installation Pag 5 Wiring Pag 8 Taking measurements Pag 9 Data processing Pag 9 Troubleshooting Pag 10 Maintenance Pag 11 Appendix 1 Pag 12 Information contained herein are property of SISGEO S r l This document is subject to change without notification and is subject to be returned upon request No part of this User s Manual may be reproduced in any form without SISGEO s S r l written permission SISGEO S r l Mexid EN 00 11 Page 2 of 12 Notes on the use of product Disposal Symbols Identification SISGEO S r l MEXID miniature borehole extensometer For a safe and efficient use of the product please read carefully the following instructions before starting any operation Any use of the product other then the one described in this manual shall be considered at user s full responsibility The same applies for any unauthorized modifications In addition to the hereby listed standards the user must comply with the provisions of the current legislation on the matter of personal safety and health of persons in the workplace SISGEO is not responsible for any trouble breakdowns accidents etc due to the lack of knowledge and or confidence or non compliance with with the requirements contained in this manual2. Check that the product has not been damaged during the transport Verify that the package includes all items as well as any requested optional accessories if anything is missing please promptly contact the manufacturer The user must strictly follow all the operations described in this manual Maintenance or repair of the device is allowed only to authorized operators These operators must be physically and intellectually suitable For information about instrument or order spare parts request please always specify data written on the identification label When replacing parts always use ORIGINAL SPARE PARTS The manufacturer reserves the right to make changes without prior notice for any technical or commercial requests We ll try anyway to keep the manuals updated in order to reflect product s revisions updates According to the European Standard 2002 96 CE the device must be disposed in a proper manner The recyclable materials within the device shall be collected by the user in order to avoid the environmental pollution For further information please contact your dealer or local waste disposal service This product must be disposed in a collection point for electronic components recycling Incorrect disposal by the user could be subject to fines Below are the symbols used to catch reader s attention on the manual Warning These operation must be performed from specialized personnel Pay particular attention to the
3. asure Wiring not correct Make proper wiring over range After sales assistance for calibrations maintenance and repairs is performed by Sisgeo s service department The authorization of shipment shall be activated by RMA Return Manufacturer Authorization Fill in the RMA module clicking on http www sisaeo com en assistance repairs Send back the instrument equipment with the complete accessories using suitable packaging or even better the original ones The shipping costs shall be covered by the sender Please return to the following address with suitable delivery document SISGEO S r l Via F Serpero 4 F1 20060 MASATE MI On the delivery document is mandatory to indicate the RMA code received Technical assistance e mail assistance sisgeo com Mexid EN 00 11 Page 10 of 12 MEXID miniature borehole extensometer Appendix 1 THERMISTOR TEMPERATURE CONVERSION Resistance to temperature equation 252080 qut A B LnR C LnR Where T temperature in 9C LnR natural Log of the thermistor resistance A 1 4051x10 coefficents calculated over the 50 to 70 C span B 2 369x10 C 1 019x10 SISGEO S r l Mexid EN 00 11 Page 11 of 12 MEXID miniature borehole extensometer Appendix 2 V V LP DTE ASSEMBLY DTE assembly equipped with Linear Potentiometer having V V signal output Wiring 2 FOLD DTE ASSEMBLY 3 FOLD DTE ASSEMBLY Function Roder Rod 2 Rodas Red Bak Bow Sig
4. d as a spare SISGEO S r l Mexid EN 00 11 Page 8 of 12 Taking measurements Data processing SISGEO S r l MEXID miniature borehole extensometer Manual measurements are carried out by portable readout i e SISGEO CRD 400 New Leonardo connecting the cable wires to the readout flying cable clips Please refer to the above wiring scheme and readout manual for wiring instructions MEXID allows automatic measurements by means of SISGEO ADK 100 data acquisition system or any other suitable datalogger Please refer to the above wiring scheme for wiring instructions For further information please refer to readout and or ADK 100 user manual The following formulas allow to convert the electric measurements into engineer values Linear factor 3 Leng Leiec S mm Polynomial factors gt Leng Leiec X A Letec x B C mm Leng Engineering reading Le ec electric reading S sensitivity factor A B C polynomial conversion factors S A B C factors are stated on DTE Calibration Report With regard to the measuring range rod position of DTE transducers herewith follows the table with the nominal values for both VW and LP DTEs DTE Nominal values rod position The exercise readings refer to the initial reading zero reading ero reading xercise readina Zero reading shall be taken carefully once the installation is performed and the instrument is in operating conditions Example LP DTE rang
5. e 50mm mA readings S 0 32051 mA mm A 6 984 E 04 B 3 137 E 00 C 1 264 E 01 Lo 12 050 mA L 16 048 mA L gt Ly gt Compression Using Linear factor Li Lo S 16 048 12 050 0 32051 12 47mm Polynomial Factor Li x A L x B C Lo x A Lox B C 37 522 25 0590 12 46mm Temperature Reading Using readout units such as SISGEO CRD 400 New Leonardo temperature will be displayed directly in C degrees Celsius if the resistance value is read the conversion formula or the table in Appendix 1 can be used Mexid EN 00 11 Page 9 of 12 Troubleshooting Maintenance SISGEO S r l MEXID miniature borehole extensometer MEXID is a fully assembled instrument and DTE replacement maintenance is not allowed Checks of malfunctioning are limited to the following x LLI O 2 C T Z lt x r LL LLI LL O gt Measure DTE shaft out of range not stable Cable shield not connected Connect the shield Electromagnetic fields generated by engines generator antennas Shield the signal cable welders or high voltage lines nearb Wire Cable cut Repair the cable not detected Cable splicing kit available at SISGEO Cable damaged Measure VW coil resistance by portable Ohmmeter Acceptable values are in the range of 150Q 15 Wiring not correct Make proper wiring Measure Wiring not correct Make proper wiring not stable Measure Wiring not correct Make proper wiring 0 mA Me
6. er nr 20 or 24 and unscrew the threaded cap 2 using the spanner nr 46 Warning don t twist the cable Once the grout hardened remove the fixing plate unscrewing the three screws with allen key nr 4 SISGEO S r l Mexid EN 00 11 Page 6 of 12 MEXID miniature borehole extensometer Extract the plate removing the two screws with allen key nr 3 Turn the threaded rod by wrench nr 10 counterclockwise and remove it Once extracted the threaded rod lock the M8x12 screw with the bonded washer supplied with MEXID separately for waterproofing SISGEO S r l Mexid EN 00 11 Page 7 of 12 MEXID miniature borehole extensometer Close MEXID screwing the threaded cap fix plate by screws and tight the cable gland Wiring MEXID is available with e Vibrating wire transducer assembly VW DTE assembly e Linear potentiometer transducer assembly LP DTE assembly Herewith follows the wiring scheme for both VW and LP 4 20mA current loop assembly for 2 fold DTE 3 fold DTE and 4 fold DTE assembly Function Rods Rod 2 Thermistor_ Tw too fe vatow wro Sex me ome TIT we 3 FOLD DTE ASSEMBLY NENNEN 1 sea Freer Temo sare e Deme YC 4 FOLD DTE ASSEMBLY Red white Black white Yellow White it Green erent Blue revo 6a remo are O TT 3 fold and 4 fold DTE assembly are equipped with two thermistors one of them considere
7. following instruction Instruments can be identified e From a production lot number written on the Compliance Certificate e From a serial number s n engraved indelibly on the instrument e From a label on the instrument e From a label on the cable Mexid EN 00 11 Page 3 of 12 Description fixing plate Multirod transducer assembly grouting tube fiberglass rod with protection sleeve fiberglass rod with protection sleeve bottom anchor bottom anchor SISGEO S r l MEXID miniature borehole extensometer Mexid EN 00 11 MEXID is a small diameter electric transducers multi rod extensometer for application in stable and open boreholes The system consists of e multirod head assembly 50mm OD equipped with 2 3 or 4 linear built in displacement transducers DTE and multicore cable e fibre glass measuring rods with nylon sleeve e groutable anchors MEXID is fully preassembled at factory with the measuring rods supplied at the fixed lengths The longest rod is identified as 1 the other rods are numbered clockwise by decreasing lengths Both vibrating wire VW and linear potentiometer LP transducers DTE are available with 50mm and 150mm range pre set at 50 of the full scale Grouting tube is supplied separately Page 4 of 12 MEXID miniature borehole extensometer Preliminary MEXID shall be installed in a stable and open borehole checks The use of a temporary protection cas
8. ing is possible but very delicate because the system has to be fixed set at the surface Suitable diameter is BQ borehole size 46 55mm For the first meter the borehole shall be enlarged up to 75mm since the grouting tubes will be used Before starting installation is recommended to e check the integrity of the instrument and if all the components have been delivered correctly e take control readings by portable readout i e CRD400 Useful tools metric e Allen keys n 3 4 6 e Spanner n 20 24 46 e Wrench n 10 Installation Phase 1 Groutin Grouting tubes orange are supplied separately The two grouting tubes shall be cut to the desired lengths the shorter shall be approx 1 5m long the longest 2m over the longest rod Fix the longest grouting tube to the rod with adhesive tape l Fixing plate N Seal borehole to avoid grout leakage SISGEO S r l Mexid EN 00 11 Page 5 of 12 MEXID miniature borehole extensometer Upward installation Transducer assembly Seal borehole to avoid grout leakage Once the grouting is ended cut and seal the grouting Grouting tubes Phase 2 Release of the transducer assembl MEXID is supplied with the transducers blocked in order to prevent rod movements during grouting In order to unlock the transducers follow the sequence 1 to 7 Fixing plate Release the cable gland 1 with the spann
9. nal Red White Black White Brown White ew sue vew Grey Function Rod 1 Rod 2 Rod 3 Rod 4 Signal Red White Black White Brown White Yellow White For manual readings use CRD 400 only with V V LP interface Please select voltage on main menu Connect the clips A B C to the colored cable wires as reported in the following table 2 FOLD DTE ASSEMBLY CRD 400 clips Rod 1 Rod 2 T Vcc 3 FOLD DTE ASSEMBLY CRD 400 clips Rod 1 Rod 2 Rod 3 Red Black Brown Red White Black White Brown White B w www ew 8 s vw s m SISGEO S r l Mexid EN 00 11 Page 12 of 12
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