Manual - SISGEO North America
Contents
1. MULTIPOINT ROD EXTENSOMETER User Manual Multipoint rod extensometer INDICE Introduction Pag 4 Description Pag 4 Preliminary checks Pag 7 Installation Pag 8 Taking measurements Pag 22 Data processing Pag 23 Troubleshooting Pag 24 Maintenance Pag 24 Appendix 1 Pag 25 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 Multipoint rod extensometer_EN_00_12 Page 2 of 25 Notes on the use of product Symbols Identification SISGEO S r l Multipoint rod 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 than 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 manual Check that the product has not been damag2. Multipoint rod extensometer_EN_00_12 Page 24 of 25 Multipoint rod extensometer Appendix 1 THERMISTOR TEMPERATURE CONVERSION Resistance to temperature equation 1 A B LnR C LnR 0732 Where T temperature in C 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 Multipoint rod extensometer __EN_00_12 Page 25 of 25
3. joint Place carefully the rod batch on the bottom Slide the terminal joint on the terminal and mark the terminal tube as shown in the tube until it stops Screw the joint using 2 picture spanners nr 14 Cut it under the mark at 264mm for transducers up to 100mm 364mm for transducers above 100mm SISGEO S r l Multipoint rod extensometer_EN_0O_ 12 Page 11 of 25 Multipoint rod extensometer Screw the pushing rod on the terminal joint and push until the rods are hooked at the bottom Unscrew the pushing rod Assemble the block cap screwing both the threaded rod and the black cap Carry out the same procedure for all the rods Grout the rods using the longer grouting tube A Grouting tube B is for drain and top up Internal nut Protection cap Once the grout hardened release the Install the transducers or screw the protection cap rods unscrewing the internal nut first Assemble the protection cover on the head and then the black joint Now the rod is free to slide in the sleeve It is possible to assemble the transducers or to take readings with digital caliper SISGEO S r l Multipoint rod extensometer_EN_0O_ 12 Page 12 of 25 Multipoint rod extensometer Double reading multipoint fiberglass rod extensometer Unroll the instrument close to the drilling Assemble Insert the instrument within the the rod centering ring If necessary fix with borehole adhesive tape the grouting tubes with t
4. also be used in loose soils with appropriate arrangements for the installation Typical applications are rock pile strains during tunnel excavation rock walls straining and buildings settlement Sisgeo manufactures 2 models e Single reading multipoint rod extensometer mechanical or electric e Double reading multipoint rod extensometer contemporary mechanical and electric measure Multipoint rod extensometer consists in 1 A head where the rods are fixed 2 One or more measuring rods Available in fiberglass steel or invar They are protected from grouting through a protection sleeve Bottom anchors One for each measuring rod to be grouted in the ground 2 grouting tubes Multicore cable optional for connection to a readout ee l Protection cover Double reading multipoint rod extensometer Protection cover Single reading multipoint rod extensometer Multipoint rod extensometer_EN_00_12 Page 4 of 25 SISGEO S r l Multipoint rod extensometer Single reading measuring rods length agreement Middle rod Shortest rod Short grouting tube lt lt Long grouting tube gt Longest rod Double reading measuring rods lenght agreement Longest rod Long grouting tube Short grouting tube Shortest rod General notes Sisgeo supplies fiberglass multipoint rod extensometers rolled up and ready for the installation set up with the requested rod number and leng
5. rod extensometer_EN_00O_12 Page 18 of 25 Multipoint rod extensometer Remove the block cap unscrewing the internal nut first Connect the transducer to the readout and then the black joint Place the transducer in order to read the chosen value Connect transducer s conductors with Put back the head metal protection and close the ones of multicore cable using the the cover with its screws supplied clamps SISGEO S r l Multipoint rod extensometer_EN_00O_12 Page 19 of 25 SISGEO S r l Multipoint rod extensometer EXTENSOMETERS UPWARD INSTALLATION In case the installation will be carried out upward we recommend to harden the rods using for example a plastic tube 30mm ca instead of the centering ring in order to push the rods in the hole Before starting the grouting seal the hole e g with foam or quick setting cement Scheme for upward hole grouting Seal borehole to avoid grout leakage Once the grouting is ended cut and seal the grouting tubes Grouting tubes Multipoint rod extensometer_EN_00O_12 Page 20 of 25 Multipoint rod extensometer ELECTRIC TRANSDUCERS INSTALLATION DTE Before proceeding make sure that the block pin is placed as shown Follow the procedure in reverse to dismantle the transducer Block pin Screw the transducer on the rod Screw the joint on the chromed ring Connect the transducer to the readout place it where needed and block it tig
6. ed 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 Below are the symbols used to catch reader s attention on the manual Pay particular attention to the following instruction Instruments can be identified From a production lot number written on the Compliance Certificate From a serial number s n engraved indelibly on the instrument From a label on the instrument From a label on the cable Multipoint rod extensometer _EN_00_12 Page 3 of 25 Introduction Description SISGEO S r l Multipoint rod extensometer Multipoint rod extensometers are used to measure the movements between the head and the anchor points installed at selected depths They are mostly employed in rocks but they can
7. he rods Hold up the head and grout the rod Once the grouting is ended cut the tubes using the longer grouting tube A close to the plate Grouting tube B is for drain and top up SISGEO S r l Multipoint rod extensometer_EN_00O_12 Page 13 of 25 Multipoint rod extensometer Internal nut Once the grout hardened release the rods Remove the metal protection of the head unscrewing the internal nut first and then the unscrewing the four screws allen key nr 4 black joint Connect transducer s conductors with the Put back the head metal protection and ones of multicore cable using the supplied close the cover with its screws clamps SISGEO S r l Multipoint rod extensometer_EN_0O_ 12 Page 14 of 25 Multipoint rod extensometer Double reading multipoint steel or invar rod extensometer Terminal tube Unroll the instrument close to the drilling Locate among the rods the terminal tubes Assemble the rod centering ring If they are within a plastic net and have a female thread on one side necessary fix with adhesive tape the grouting tubes with the rods Insert the instrument within the Hold up the head borehole SISGEO S r l Multipoint rod extensometer_EN_00O_12 Page 15 of 25 Multipoint rod extensometer rod quick joint a Remove the metal protection of the head Screw a bottom quick joint on a rag unscrewing the four screws allen key nr 4 Screw another rod un
8. htening the joint If necessary connect transducer s conductors with the ones of multicore cable using the supplied clamps SISGEO S r l Multipoint rod extensometer_EN_0O_ 12 Page 21 of 25 Multipoint rod extensometer Taking Taking measurements with digital caliper mechanical measure measurements Remove the cover from extensometer s head and the protection cap If necessary assemble the extensions on the Switch on the caliper select the unit of caliper measurement mm or inch Take the caliper to stop and reset with ZERO key Insert the caliper as shown place it on the chromed ring and push the rod until stops Take note of the value on the display Taking measurements with electric transducer Manual readings are taken connecting the conductors to a readout according to the following scheme Current loop 4 20 Red mA sensors VW Vibrating wire Black VW sensors VW White Thermistor Green Thermistor To obtain reliable measures with current loop instruments we recommend a warm up time not less than 10 seconds For automatic measures connect the instrument to a readout SISGEO S r l Multipoint rod extensometer_EN_00_12 Page 22 of 25 Data Processing SISGEO S r l Multipoint rod extensometer The digital caliper displays a displacement value in the chosen unit of measurement The transducer displays an electric value that has to be converted as follows Linear facto
9. is for drain and top up SISGEO S r l Multipoint rod extensometer_EN_0OO_ 12 Insert the instrument within the borehole Internal nut Once the grout hardened release the rods unscrewing the internal nut first and then the black joint Now the rod is free to slide in the sleeve It is possible to assemble the transducers or to take readings with digital caliper Page 8 of 25 Multipoint rod extensometer Protection cap Install the transducers or screw the protection cap Assemble the protection cover on the head SISGEO S r l Multipoint rod extensometer_EN_00O_12 Page 9 of 25 Multipoint rod extensometer Multipoint steel or invar rod extensometer Terminal tube eer Unroll the instrument close to the drilling Locate among the rods the terminal tubes Assemble the rod centering ring If they are within a plastic net and have a necessary fix with adhesive tape the female thread on one side grouting tubes with the rods Insert the instrument within the Hold up the head borehole Screw a bottom quick joint on a rod SISGEO S r l Multipoint rod extensometer_EN_00O_12 Page 10 of 25 Multipoint rod extensometer Screw another rod until is blocked Insert in the hole the rod with the Carry on for the entire length quick joint downward Hold it with Attention don t drop the rods the gripper and follow the convention The last rod must be the terminal on page 5 tube gt Terminal
10. m Possible cause Unstable measure Cable shield not connected Connect the shield Electromagnetic fields generated Identify and remove the by engines generator antennas cause welders or high voltage lines nearb Wire not detected Cable cut or damaged Repair the cable Cable splicing kit available at SISGEO Measure the resistance between Red and Black conductors acceptable values 15002 15 Consider cable length for model OWE116000 is about Wiring not connect Make proper wiring mA transducers Problem Possible cause fete Unstable measure Wiring not connected Make proper wiring 0 mA measure Overrange Cable cut or damaged Repair the cable Cable Splicing kit available at SISGEO measure 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 sisgeo 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
11. r gt Leng Letece S mm Polynomial factors gt Leng Letec X A Letec X B C mm Leng Engineering reading Lelee 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 D L Lo D Displacement Lo Zero reading Li Exercise reading Zero reading shall be taken carefully once the installation is performed and the instrument is in operating conditions Example LP DTE range 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 Lo gt Compression Using Linear factor Li1 Lo S 16 048 12 050 0 32051 12 47mm Polynomial Factor Li x A Lix 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 Multipoint rod extensometer __EN_00_12 Page 23 of 25 Troubleshooting Maintenance SISGEO S r l Multipoint rod extensometer VW transducers Proble
12. th In both steel and invar multipoint rod extensometers the head with the grouting tubes and the protection sleeve are pre assembled Rods bottom quick joint terminal tubes and terminal joints have to be assembled on site In double reading fiberglass multipoint rod extensometers the transducers are set up to 50 full scale unless otherwise requested in the order Multipoint rod extensometer_EN_00O_12 Page 5 of 25 Multipoint rod extensometer Measuring methods Measures are carried out through an electric transducer electric measure and or with a digital caliper mechanical measure The electric transducer consists in Transducer body Measuring rod Block pin Cable for readout connection Adjustable joint for the head fixing UO BR WN eB Electric transducers DTE can be potentiometer with current loop signal 4 20mA LP or vibrating wire VW and are supplied Dismantled if requested in single reading multipoint rod extensometers Assembled in double reading multipoint rod extensometers The digital caliper is supplied with extensions to be used in case of need SISGEO S r l Multipoint rod extensometer __EN_00_12 Page 6 of 25 Preliminary checks SISGEO S r l Multipoint rod extensometer Extensometers shall be installed in boreholes with stabilized walls Boreholes must have a minimum diameter of e 45 mm for single point extensometers e 101mm for multipoint extensometers In the
13. til is blocked Carry on for the entire length Attention don t drop the rods The last rod must be the terminal tube Remove the block Insert in the hole the rod with caps the quick joint downward Hold it with the pliers and follow the convention on page 5 SISGEO S r l Multipoint rod extensometer _EN_00_12 Page 16 of 25 Place carefully the rod batch on the bottom and mark the terminal tube as shown in the picture Cut it at 107mm under the mark Screw the black joint and the internal nut Repeat it for all rods SISGEO S r l Multipoint rod extensometer_EN_0OO_ 12 Multipoint rod extensometer Pushing rod gt Terminal joint lt Slide the terminal joint on the terminal tube until it stops Screw the joint using 2 spanners nr 14 Screw the pushing rod on the terminal joint and push until the rods are hooked at the bottom Unscrew the pushing rod Assemble the head metal protection Grout the rod using the longer grouting tube A Grouting tube B is for drain and top up Page 17 of 25 Multipoint rod extensometer Once the grouting is ended cut the tubes Once the grout hardened remove the head close to the plate metal protection from the instrument Support bar Fix the transducers to the support bar Fix the transducer rod to the installed through blocks and supplied screws rods allen key nr 4 allen key nr 4 SISGEO S r l Multipoint
14. upper 50 cm the hole must be enlarged up to 140mm in order to install extensomer head We recommend to contact Sisgeo for technical support if the installation would be performed in unstable grounds so that it is necessary to leave the convering in the borehole Before starting the electric transducers installation we recommend to perform a control reading with a readout Useful tools not supplied Double reading Single reading Double reading Single reading multipoint fiberglass multipoint fiberglass multipoint steel or multipoint steel or rod extensometer rod extensometer invar rod invar rod extensometer extensometer Allen key n 4 Spanner n 12 13 2 spanner n 14 Spanner n 12 13 14 24 14 17 24 Adhesive tape Tubular box wrench Allen key n 4 Tubular box wrench n 10 24 n 10 24 Pushing rod Pushing rod assembly kit assembly kit available in Sisgeo available in Sisgeo Adhesive tape Jig saw or cutter Jig saw or cutter Adhesive tape 2 pliers Adhesive tape Multipoint rod extensometer_EN_00_12 Page 7 of 25 Multipoint rod extensometer VERTICAL INSTALLATIONS DOWNWARD Installation Multipoint fiberglass rod extensometer Unroll the instrument close to the drilling Assemble the rod centering ring If necessary fix with adhesive tape the grouting tubes with the rods B Hold up the head and grout the rod using the longer grouting tube A Grouting tube B
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