CTS-02V4 User Manual - Raincountry Industrial
Contents
1. Fig 3 1 Model of concrete surface The Xmax is solved by Equation 3 2 and substituted into Equation 3 1 Thus Equation 3 3 can be obtained F aax VMK 3 3 VMK means mechanical impedance and can be obtained by dividing the maximum force generated by the initial velocity of the hammer the initial velocity at the time of impact The spring coefficient K is the index that corresponds to the elastic coefficient on the concrete surface It is known about the correlation between the elastic coefficient and the compressive strength By taking advantage of this fact the compressive strength can be estimated by the concrete tester CTS 02V4 In practice when hammering the maximum impact force is proportional to the 1 2 power of the impact velocity Therefore the impact velocity can be corrected as shown in Equation 3 4 when the mechanical impedance is calculated a VMK S 3 4 10 Nitto Construction Regarding estimation of strength the relationship between the mechanical impedance index value and the elastic coefficient of the concrete is shown in the following Equation 3 5 E aZ 3 5 Here ais a constant number and N is used as 4 if the elastic coefficient is unchanged at NDT range of strain and at the end breaking time or 3 in the case of the normal concrete in taking account the reducing rate of the elastic coefficient The constant number a depends on the maximum strain amount of the concrete In2. Fig 6 6 Screen at First Hammering Table 6 1 Items and Contents pass 5 Mean score of strength index value recorded Number of measured data recorded Strength index value with each Surface deterioration index value Delamination index value with each impact _ 38 Nitto Construction e When the first hammering is completed it is not determined whether the data is adoptable or not MN and N remain 0 If there is nothing wrong with the data hammering should be continued e At the second hammering the data of the first hammering is recorded and the mean score and the numbers of measurement are renewed e If there is something wrong with the measured data press button twice so that the measured data becomes ineffective and is deleted from measured waveform When pressing button and followed by pressing D button judgement of ineffectiveness is released e When finishing the measurement press O button At this stage the number of the measured point and the mean value are settled Please note that the data of the last waveform is not reflected in calculation of the mean score unless D button 1s pressed When pressing D button the screen will return to LOOKUP mode that the recorded data exists See Figure 6 3 e The data cannot be recorded if the impact was too strong or too light in CTS 02V4 Please check the impact strength by trying to hammer a few times prior to a real hammering After hammering ele
3. Name Function Cancel To exit the dialog without changes of thermal clock of CTS 02V4 To set the present date and time for CTS 02V4 from that of PC Set Manual Date To set the arbitrary date and time in YY MM DD H M and S 29 4 6 Processing of Measurement Data 4 6 1 Read in of Data e This is way to check the data stored in CTS 02V4 Nitto Construction e The data consists of Site Number and coordinate number X Y N STR INDEX e CT S 02V4 body is connected to the PC by USB cable e After connection is completed the site number of the stored data will be displayed automatically in the Site Number list box e Click the site number what you want to read the data in Site Number list box e When clicking DATA Read button 1 the data in the selected site number will be displayed in X Y N STR INDEX list box e When clicking the coordinate number in X Y N STR INDEX list box the measured data will be displayed in No STR Index list box You can find the strength value of the concrete and Index value in No STR Index list box Site Number List Box X Y N STR INDEX List Box CTS02V4 PC Connecte4 Where Data wif be saved a List of Usdd Site ata X Y NZZTRZINDEX Ref _ STR Z Index 001 001 02_ 67 0 1 01 002 001 022 81 9 104 001 002 023 74 3 1 04 002 002 021 75 8 1 03 7998 101 83 53 1 03 54
4. See Fig 5 3 This is an initial state e During power on of CTS 02V4 press button for 3 seconds to power off Fig 5 3 SITE Selection Screen _35 Nitto Construction 6 Method of Measurement 6 1 Selection of SITE Number e In the initial state of CTS 02V4 press A or v button to select the SITE number for a storage of the data e When pressing A button SITE number will decrease while pressing v button SITE number will increase e When the data was recorded in SITE it will display as USED shown in Fig 6 1 while the data was not recorded in SITE it will display as EMPTY shown in Fig 6 2 e When SITE number is selected to use press D button e Each SITE number contain X Y coordinate of 128 by 128 and each measured data is recorded in the selected SITE number One hundred of data can be recorded in each coordinate number Fig 6 1 Example of Display for USED Fig 6 2 Example of Display for EMPTY 6 2 Selection of Coordinate Number and Confirmation of Data e When SITE number is selected it becomes LOOKUP mode e LOOKUP mode is a mode to read out the data recorded in CTS 02V4 e When the recorded data exists in the specified SITE number the numbers of the measured data and the mean score of the measured data are displayed as shown in Fig 6 3 e When the recorded data does not exist in the specified SITE number the message of Site File creating shows up and then the screen is displayed as shown in Fig 6 4 Curre
5. l l High compressive concrete High Compressive 30 N mm2 150 N mm X The mode and parameters for set up are used for calculation of the actual index values 25 Nitto Construction e When exiting without set up click Not Set Up button 4 e When exiting with set up click Set Up button 49 lt MEASUREMENT gt Table 4 3 e There is a number of measurement items in CTS 02V4 e Those three items Strength Area Mode Strength Point Mode and Reactive Side Impedance make it possible to estimate the compressive strength of the concrete e When you want to read out the compressive strength as N mm directly select Strength Area Mode or Strength Point Mode e When you want to read out the compressive strength as the index value select Reactive Side Impedance e The rest of items is used except for estimation of the compressive strength of the concrete Strength Point Mode e After hammering at the same position of the concrete twenty times the mean score will be calculated e The mean score will be set automatically within 20 range e Among the data measured by hammering twenty times the data beyond the range if any will be excluded automatically from calculation of the mean score e Since then the data beyond the range will not be obtained with restrictions X Except for Strength Point Mode it will not be set the mean score or the range as described above even if hammering at the same position of
6. of batteries Fig 5 1 Battery Pack X Installing the batteries in wrong direction in terms of the electrodes may lead to damages of the battery pack and the instrument Please refrain from combination of old and new or different types of batteries ex manganese and alkaline batteries 5 2 Connection of Hammer Unit e Although the instrument body and the hammer unit are already connected the hammer unit is removable e Hold the grip firmly and withdraw the cable slowly when removing the hammer unit e Plug the hammer unit connecter into the receptor of the instrument body e There exist a direction in the receptor and connector Check the shape of the receptor and connector and plug the connector into the receptor carefully e CTS 02V4 can be stored as connected the instrument body and the hammer unit It is necessary to remove the hammer unit Fig 5 2 Instrument Body and Hammer Unit only in special circumstances Otherwise you don t need to remove it X The connector will not detach by simply pulling the cable Do not pull the cable It may cause breaking of cable and other problems _ 34 Nitto Construction 5 3 Power On and Off e After installing the batteries press the power button 0 for three seconds to power on e Once CTS 02V4 is started up information on version of measurement instrument date and time in the internal clock and parameters set up are displayed and then move to SITE selection screen
7. the case of the concrete that is led the compressive breakdown at 2250ustrain the calibration value in the parameter will be about 10 12 zais Nitto Construction 3 2 Calculation from Waveform The waveform of impact force 1s measured by the accelerometer built in to CTS 02V4 Fig 3 2 shows the waveform of impact force when hammering the concrete The acceleration generated by impact of hammer on the surface of the concrete is actually the decelerated acceleration In other words as shown in Equation 3 6 the impact velocity is given by time integration until the acceleration reaches the maximum and the maximum impact force can be computed by multiplying the mass of hammer by the maximum acceleration based on the law of inertia F a MA Vama f Al 3 6 Ve max f Al Here Ais the acceleration and 72 is the time that acceleration reaches the maximum Time when hammer is Time when hammer is pushing onto the concrete Frm pushed back by the concrete max gh E For a Fmax Fig 3 2 Waveform In the actual concrete the time until the impact force becomes the maximum is the process that the hammer is pushing onto the concrete surface and the elastic deformation is resulting active phase On the other hand the time after the impact force reaches the maximum is the process that the hammer is pushed back by recovering the elastic deformation of the concrete surface reactive phase CTS 02V4 focuses on the reactive
8. the concrete twenty times and will be calculated the simple mean score Table 4 3 Explanation of MEASUREMENT Estimation for l Contents Compressive Strength It can be readable as N mm directly It is not applied Strength statistical processing such as the range setting or no Area Mode restriction for obtaining the data even if hammering at the same position of the concrete twenty times It can be readable as N mm directly When hammering Strength l at the same position of the concrete the range will be set Point Mode with restriction for obtaining the data It can be calculated from the entire waveforms by Impedance impact force It is not possible to estimate the compressive strength of the concrete 26 Nitto Construction l l It can be calculated from the first half of peak of the Active Side X lt waveforms by impact force It is not possible to estimate Impedance the compressive strength of the concrete It can be calculated from the latter half of peak of the waveforms by impact force It is necessary to convert for Reactive Side estimation of the compressive strength of the concrete Impedance Please convert the compressive strength using the conversion formula or the calibration chart provided by manufacturer X The mode and parameters for set up are used for calculation of the actual index values e When exiting without set up click Not Set Up button 4 e When exiting wit
9. 11 1 01 99 19 0 98 64317 101 E 79 10 1 03 76 20 1 02 68 87 1 00 65 98 1 01 66 29 1 00 65 32 1 00 75 29 1 02 83 6 1 04 1 01 Fig 4 9 Screen at Start up 4 6 2 Confirmation of Parameters fates SET UP CTS02V4 Timer Set e When confirming what parameters were used for the measured data specified by clicking the coordinate number in X Y N STR INDEX list box click Show Parameter button e You can find the parameters used for measurement 30 Nitto Construction 4 6 3 Displaying of Waveforms e When clicking Show Wave Form button dialog of displaying waveform is appeared as shown in Fig 4 10 e Please refer to the list of the name of button and its function as shown in Table 4 6 The first waveform at the measurement point will be displayed in this dialog The measured waveform number estimated strength value and Index value are displayed at the top of the dialog shown in red box of Fig 4 10 X These values are recalculated by the program of PC and may be different slightly from the measured values with CT S 02V4 It can be checked in this dialog whether the waveform is measured accurately or not Wave 0017010 STR 23g 3N mm2 Index O5 mm Ee oo Fig 4 10 Dialog of Displaying Waveform Table 4 6 List of Name of Button and its Function To display the previous waveform To display the next waveform To enlarge waveform To display th
10. 1200 relatively shallow site The waveform is Force 1000 S00 bilaterally symmetric in common with Baer healthy surface but there are some aoe characteristics such as relatively small TA maximum value of the impact force and long Timen contact time with hammer It can be observed that the impact position shows the same behavior as the leaf spring The waveform shows the fine bell shape but the duration time of the impact force becomes longer because of the low rigidity in comparison to the healthy concrete 4 4 1000 800 600 400 200 0 0 500 1000 1500 ma 2000 Time 4 s 800 Nitto Construction Waveform of impact force when hammering on the surface of concrete with delamination Case 2 This waveform can be observed when the concrete is about to detach when hammering The normal waveform cannot be obtained because the reactive force is not generated when hammering Note that the horizontal axis time axis is totally different from the other waveforms Waveform of impact force when hammering on the concrete with the aggregate delamination This waveform can be obtained when hammering the concrete surface with the aggregate delamination caused by freezing and thawing action or running water action Many local peaks are observed and cause a jagged waveform pattern It is thought to be due to repeat the phenomena that the hammer impacts on t
11. A Batteries Power Supply l About 12 hours of Continual Usage l USB is used to connect to PC Connection to PC l It is workable as USB device Maximum data to be recorded 128x128x128x100 Nitto Construction 2 3 Precautions for use The hammer unit is precision measuring equipment It is not a real hammer Please handle it with care The instrument is made for concrete testing Do not use it to hammer nails or other hammering uses It may lead to damages to the sensor The hammer side of the hammerhead is used for making contact The hammerhead will eventually flaw the surface after many hits If the flaws are not major however it will have no effect on the measurements Usually it is enough to use light impact force Do not hammer too strong It may lead to damages to the sensor The opposite side of the hammer side is the safety cap yellow colored plastics of the sensor Do not use the cap side to make contact It may lead to damages to the sensor The CTS 02V4 is not waterproof or water resistant Please do not use it during rainfall or areas of extreme high humidity It may lead to damages to the instrument When hammering please use while lightly holding onto the grip The instrument cannot produce accurate results if hammered while holding the shaft or hammerhead Please contact at a right angle when hammering the concrete Diagonally hammering the concrete will not produce accurate res
12. CIS O2V4 User Manual Nitto Construction CTS 02V4 User Manual Safety Precautions Thank you very much for purchasing CTS 02V4 Before using the product please read this user manual carefully to use CTS 02V4 properly Regarding Symbols This user manual shows following symbols to prevent harm and damages for the users and the other persons Please read the text of this user manual after understanding the definitions of the symbols Disregarding this symbol and improper usage may cause Warning death serious injury or wounds Disregarding this symbol and improper usage may cause A Attention injury or wounds and also cause physical damages to the person Examples of Symbols Symbol OS demonstrates prohibited acts In some cases a specific content of prohibition is written in or near Figures Handling of the measurement instrument Do not put CTS 02V4 close to fire It may cause a fire or damages because heat sensitive material such as polyvinyl chloride is used for CTS 02V4 Do not put CTS 02V4 at any places that are at risk of spilling water oil chemicals etc It may cause a fire or failure of the instrument Do not throw CT S 02V4 into a fire It may cause a fire or injuries from explosion Nitto Construction instrument from dropping An allowable load is 1 kg Do not use to put anything else around shoulder It may cause injury Do not disassemble the instrument It may cause injury
13. Screen for Start up Table 4 1 List of Button Name and its Function Connect to To connect CTS 02V4 to the PC 23 Nitto Construction X When unable to connect with CTS 02V4 e Warning dialogue will be displayed as shown below See Fig 4 6 e The program will exit when click OK button e When click F P 2 L cancel button the initial screen will change a little and Connect to CTSO02V4 button will appeared in SET UPCTS 02V4 list shown on the extreme right Fig 4 6 Warning Dialog 24 Nitto Construction 4 3 Set up and Writing in of Measurement Parameters e Click Parameters Set button in the initial screen of CTS 02V4 PC e The dialog window as shown below will be displayed to input the measurement parameters See Fig 4 7 e All parameters in CTS 02V4 can be set using this dialog Measurement Parameters CONCRETE AD Normal High Compressive MEASUREMENT 2 Strength Area Mode Strength Point Mode O Impedance O Active Side Impedance O Reactive Side Impedance Condition 3 Mass of HarmmerLg 380 Sencitivitylm G 0 98 Calibration 12 00 Power Value 4 00 Trigger Level 20 Fig 4 7 Dialog Window lt CONCRETE gt 11 e Select the measuring concrete is Normal or High Compressive by reference to Table 4 2 e The parameters are different in Normal or High Compressive concrete Table 4 2 Selection of Measuring Concrete Normal concrete Normal 10 N mm2 30 N mm
14. and failure of the instrument Disassembling will void the warranty of the instrument battery fluids and a fire or injuries by explosion The following restrictions are extremely important 1 Do not use the combination of different types of batteries such as manganese and alkaline batteries 2 Please refrain from combining old and new batteries 3 Please install the batteries in the right direction in terms of positive and negative electrodes Please remove the batteries from the instrument when left unused for a long period of time Stop immediately using the instrument if it starts to smoke or smell oddly Turn the power of the instrument off remove the batteries and contact our company The hook of the instrument attached to the strap can only support the mass of the instrument itself Do not carry heavy goods on the hook It may cause injury or failure of the instrument by dropping the instrumrnt Nitto Construction Maintenance Do not wipe exterior parts with the liquid containing benzin or thinner It may be hurmful to the surface of the instrument Miscellaneous 1 The Contents of specifications of the instrument and the user manual may change without prior notice 2 Reproduction of any parts or entirety of the measurement instrument and user manual is strictly prohibited 3 The contents of the user manual were prepared carefully to give accurate information If you have any questions or suspicions how
15. ctronic sound indicates if it is a proper hammering or not X Bleep once Normal Bleep three times Too strong No bleep Too light 6 4 Deletion of Data e CT S02V4 body can delete the data with each coordinate number e When selecting the coordinate number that you want to delete at LOOKUP mode See Fig 6 3 and pressing D button it sounds the beep and the screen of display changes as shown in Fig 6 7 In this state all data recorded in the specified coordinate number will be deleted by pressing button e When you don t want to delete press D button and return to LOOKUP mode See Fig 6 3 You cannot delete all data in SITE at once Fig 6 7 Screen of Deletion of Data 39 Nitto Construction Manufacturer Nitto Construction Co Ltd 1344 5 Oumu Town Oumu Monbetsu Hokkaido 098 1702 Japan Tel 81 158 84 2715 Fax 81 158 88 3031 E mail info nittokensetsu co jp _ 40
16. dged as unlikely surface delamination 2 If STAT value is 1 it is judged as possible surface delamination 3 If STAT value is more than 2 in the active phase it 1s judged as possible aggregate delamination slight injury caused by freezing and thawing etc 4 If STAT value is more than 2 in the reactive phase it is judged as possible aggregate delamination or void severe injury caused by freezing and thawing etc Note There are various types of delamination The delamination that CTS focuses is the aggregate delamination caused by freezing and thawing In case of the 18 Nitto Construction delamination caused by corrosion of reinforcing bar the waveform will be a clear bell shape and changes of STAT value and INDX value may not be observed In such case planar measurement is carried out and location of the delamination may be identified by extraction of location that the STR value is relatively declining Even in this case however it would appear that the detectable depth for delamination is within 50 mm 19 Nitto Construction 4 Operating Instruction for CTS 02V4 PC Program This program is applied to set up of the initial parameters of CTS 02V4 and reading the data recorded in the memory 4 1 Installing of Driver e The device driver for CTS 02V4 should be installed prior to connection of CTS 02V4 to the PC e After connected to the PC CTS 02V4 is recognized as a controllable device e The operating syste
17. e concrete from mechanical impedance index value If you choose the type of the concrete it will be set up automatically This is a trigger value of the measured one You can set up l between 0 80 If you reduce the numbers it becomes to Trigger Level l l react with a weak impact In case of the concrete please set up over 40 X The mode and parameters for set up are used for calculation of the actual index values e When exiting without set up click Not Set Up button 4 e When exiting with set up click Set Up button 49 28 Nitto Construction 4 4 Browsing of Parameters The parameters can be confirmed using Show Parameter button e When clicking the button Q the parameters can be displayed You cannot however edit or write the parameters After confirmed the parameters press Exit button to exit the dialog 4 5 Set up for Timer e Click Timer Set button at the initial screen of CTS 02V4 PC e The dialog window for setting date and time is shown in Fig 4 8 e Please refer to the list of the name of button and its function as shown in Table 4 5 e Present Date appeared is the date and time in internal clock for the PC not for that of CTS 02V4 e YY MM DD H M and S means Year Month Day Hour Minute and Second at the time of opening the dialog Set Timer of CTSO2V4 Set Manual Date Fig 4 8 Dialog Window for Setting Date and Time Table 4 5 List of Name of Button and its Function
18. e initial waveform all measured data To exit the dialog 231 Nitto Construction 4 6 4 Copy of Data e When clicking Data Copy button the data of the specified SITE will be transferred to the PC X However the following warning message See Fig 4 11 will be displayed if the storage folder in the PC side is not specified Fig 4 11 Screen of Warning e In this case please input the folder name in Where Data will be saved shown on top of the screen Otherwise select the folder from the browser See Fig 4 12 available by clicking Ref button 4 or create a new folder E Desktop d Public JE Computer gt EF Network Control Panel E Recycle Bin DRIVER Fig 4 12 Screen of Browser X The data copied in the PC is shown in Fig 4 13 e Area csv 4D is the csv file to make a drawing of a map of the strength distribution based on the data measured in area mode The mean score of the measured data is written in the 128 by 128 cells e In Measure csv 49 the mean scores of the index value Index value and Status value are recorded in order of measurement 3c Nitto Construction In Over All csv 49 all data about the measurement time measuring point and the number of times of measurement are recorded e The data of waveform is recorded as the value of AD conversion directly in WaveForm aaa bbb ccc csv where aaa is X axial location bbb is Y a
19. e that the driver you choose will be the best match for your hardware Nitto Construction Browse For Folder Select the folder that contains drivers for your hardware My Documents ig My Computer Sg Local Disk C Gg CTS 02v4 D C Program C the user s Manual E TUSBOE47 iy Doc E E DRIVER i sub To view any subfolders click a plus sign above j Cancel Fig 4 4 Screen when Selected Install from a list or specific location Advanced 4 When installing the device driver unsuccessfully e Start up the device manager from control panel and search for unknown device If you find unknown device click it to renew the driver in advanced setting 22 Nitto Construction 4 2 Start up of CTS 02V4 PCprogrum e Once the device becomes usable a program CTS 02V4 PC exe starts up e The initial screen is shown below See Fig 4 5 e If the measured data exists in CTS 02V4 body the site number that was used for the measurement will be displayed in Site Number list box shown on the extreme left Where Data will be saved List of Used Site Site Data Site Number xX Y N STR INDEX No STR Index CTSso24 Connect to No STR lndex OWVO Site Number X Y N STR INDEX List Box List Box List Box SET UP CTSO2V4 DATA Read List DATA Copy Application Exit Fig 4 5 Initial
20. ed Waveform 3 4 Measured Value 3 5 Allowable range for Each Index Value Chapter4 Operating Instructions for CTS 02V4 PC Program 4 1 Installing of Driver 4 2 Start up of CTS 02V4 PC Program 4 3 Set up and Writing in of Measurement Parameters 4 4 Browsing of Parameters 4 5 Set up for Timer 4 6 Processing of Measurement Data 4 6 1 Read in of Data 4 6 2 Confirmation of Parameters 4 6 3 Display of Waveforms 4 6 4 Copy of Data 4 6 5 Deletion of Data Chapter5 Operating Instruction for CTS 02V4 Body 5 1 Installing of Batteries 5 2 Connection of Hammer Unit 5 3 Power On and Off Chapter6 Method of Measurement 6 1 Selection of SITE Number 6 2 Selection of Coordinate Number and Confirmation of Data 6 3 Measurement 6 4 Deletion of Data Nitto Construction You must read below prior to use CTS 02V4 Thank you very much for purchasing CT S 02V4 Before usage of the product please read this user manual carefully first in order to deliver superior performance of CTS 02V4 and to continue to use it for many years After reading please keep the user manual and the certificate close to the area of first use if needed 1 Name of Various Parts 1 1 Measurement Instrument Body Table 1 1 Table 1 1 Name of Various Parts of Measurement Instrument Body Receptor for l l D l To be used for connecting CTS 02V4 body to hammer unit Connection USB Port To be used for transferring data from CTS 02V4 body to PC To display the measurement modes a
21. ever please contact the distribution agent 4 Our company is not responsible for any loss of profits or estimated lost earnings by using the measurement instrument regardless of what is written above Please consent to this in advance 5 This measurement instrument is not designed for use on the equipments or instruments that involve human lives or that require a high reliability Our company cannot take any responsibilities for damages to property accidents or physical injuries caused by using the equipments or instruments 6 In the case that the instrument and software are eligible for strategic materials or services under the provisions of Foreign Exchange and Foreign Trade Control Law export of the instrument or software outside of Japan must be authorized by the Japanese government 2010 Nitto Construction All rights reserved Without approval from Nitto Construction reproduction and making changes of this user manual is prohibited Microsoft Windows 7 Windows XP Windows 2000 and Windows NT are registered trademarks of Microsoft Corporations in U S and worldwide Nitto Construction Contents Chapter 1 Name of Various Parts 1 1 Measurement Instrument Body Table 1 1 1 2 Hammer Unit Table 1 2 Chapter 2 Outline 2 1 Outline of Instrument 2 2 Specification of CTS 02V4 Table 2 1 2 3 Precautions for Use Chapter 3 Index Values 3 1 Fundamental Principles 3 2 Calculation from Waveform 3 3 Examples of Measur
22. h set up click Set Up button 49 2 Nitto Construction lt Condition gt 3 Table 4 4 e The parameters are set up for calculation of the index values e The parameters have been already set up based on the results of the calibration test by the manufacturer at the time of delivery e Some errors will be observed on the estimated strength of the concrete if parameters are changed by the user side e The numerical numbers of the parameters are inherent to the hammer used The parameters are shown in the enclosed certificate of the calibration test e Please confirm whether the parameters are input correctly before using the instrument X The numerical numbers described in this manual are one of examples Please note that the numbers are not the parameters of your instrument X Please note that some errors are observed on the estimated strength of the concrete if you use the other hammer without changes of the numbers of the parameters Table 4 4 Explanation of Condition The weight of the hammer used should be entered The Mass of Hammer l l current weight is 380 g Sou Sensitivity of accelerometer equipped in hammer is input The Sensitivity numerical numbers are inherent to the accelerometer used This is a calibrated numerical number from the measured Calibration index value to the strength This number is determined by the result of the calibration test This is a power value for conversion of the strength of the Power Valu
23. he concrete surface and of an estimated strength of concrete The value corresponds to the cube of mechanical impedance index value in case of high compressive concrete the value corresponds to the fourth power of mechanical impedance index value The measured STR value can be read directly as the estimated compressive strength N mm2 Each of measured values will be varied widely if compared to mechanical impedance index value lt INDX Value gt INDX value is an index value of surface deterioration e The value shows the rate between the initial velocity when the hammer contacts the concrete and the velocity of rebound If the measured body is ideally elastic the value becomes 1 1f the surface is deteriorated the INDX value will increase e When the INDX value is over than 1 5 at any time the strength may be underestimated In such case it is necessary to polish the concrete surface 16 Nitto Construction lt STAT Value gt The STAT value is an index value of the eiaa Local peak delamination The value shows the number of local peaks in Fore the first and second halves of the waveform measured See Figure 3 1 The intended delamination is an aggregated delamination that is exposed by freezing and Tim thawing of concrete or running water If aggregated delamination exists around the Bye a nee ene or yeas concrete surface several local peaks will appear in measured impac
24. he aggregate and the aggregate breaks down The concrete surface for ae such waveform is shown below ere S EME arm 15 Nitto Construction 3 4 Measured Value Three index values STR Value Strength INDX Value Index STAT Value Status can be calculated based on a waveforms of impact force in CTS 02V4 The calculated values can be seen in the display lt STR Value gt e STR value is an index value of strength of the concrete e Both of the mechanical impedance index value and the spring constant index value can be used to estimate the compressive strength of the concrete By means of set up of parameters you can select for which value should be used Difference between Mechanical Impedance Index Value and Spring Constant Index Value Mechanical Impedance Index Value The strength calibration chart should be used to estimate the compressive strength of the concrete based from the measured STR value e Even if the variance of STR values was small the variance of estimated compressive strength of the concrete may be significantly large by the calibration chart Example When the STR value is less than 1 37 change of 0 01 units in STR value results in a change of an average of 0 67 N mm When the STR value is 1 37 and more change of 0 01 units in STR value results in a change of an average 2 09 N mm Spring Constant Index Value Spring constant index value is an index value of spring constant per unit area of t
25. m OS is Windows XP or above with 32 bit only e It is not acceptable for 64 bit version Procedure for Installing Installing Driver for License e Insert the accompanying CD ROM into the PC Execute IINSTALL BAT in TUSBOE47 folder through DRIVER folder e Although several warning messages will be displayed during installing in Windows 7 and VISTA please ignore it and continue to install T xSYSUN BA Fig 4 1 Execution Screen Connection CTS 02V4 Body with PC e Check that CTS 02V4 body is in the initial state after power on e Connect CT S 02V4 body to the PC using an accompanying USB cable e The initial state of CTS 02V4 body will be displayed as shown in Fig 4 2 Fig 4 2 Display Screen of Initial State 20 Installing of Device Nitto Construction e After connecting CTS 02V4 body to the PC the device manager will be started up and be processed for registration of the new device Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for curent and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your permission a h Sees esl Can Windows connect to Windows Update to search for software Yes this time only Oi Yes now and every time connect a device No not this time Click Next to continue Found New Hardware Wizard S
26. nd measurement results Power To be used to power on off for CTS 02V4 Control Panel D Decide To be used when you decide for various purposes a Arrows To be used to select SITE number and coordinate number To install 4 pes Size AA batteries Battery pack employs a slide 6 Battery Pack gate system Nitto Construction 1 2 Hammer Unit Table 1 2 f Table2 2 Name of Various Parts of Hammer Unit To make contact with a target object To protect the sensor D Hammer Cap Do not use the cap side to make contact To protect the sensor Grip Do not use the cap side to make contact Connecting To connect CTS 02V4 body Code It is connected in advance when delivered the instrument Nitto Construction 2 Outline 2 1 Outline of Instrument The concrete tester Concrete Test and Surveyor Type 2 Version 4 1s a non destructive testing instrument that estimates the compressive strength of concrete without causing any damage This instrument applies to estimation of the compressive strength of concrete structures and integrity assessment such as detection of delamination near concrete surface In this user manual the instrument will be referred to as the CTS 02V4 2 2 Specifications of CTS 02V4 Table 2 1 Table 2 1 Specifications of CTS 02V4 Concrete Test and Surveyor Type 2 Version 4 Name CTS 02V4 108mmx169mmx42mm Body Size l l Outshoot is not included Hammer Weight 380g 4 Pcs Size A
27. nt status of instrument Number of Mean score of measured data Fig 6 3 Screen When Recorded Data exists Measured data Fig 6 4 Screen When Recorded Data Does Not exist 36 Nitto Construction e Press lt or gt button for increase or decrease of the X axis in the cordinate X Y e Press A or v button for increase or decrease of the Y axis in the cordinate X Y e When pressing button at LOOKUP mode it returs to the initial state In the specified coordinate number where the measured data has already existed it is not possible to measure newly or additionally 237 Nitto Construction 6 3 Measurement e When selecting the arbitrary coordinate number that the measured data does not exist and then pressing D button it becomes a waiting for measurement screen as shown in Fig 6 5 e When screen becomes a state of waiting for measurement the display will change from LOOKUP mode Fig 6 4 to MEAS mode Fig 6 5 In this state you can start hammering Current status of instrument Fig 6 5 Waiting For Measurement Screen e The data will be renewed with each effective hammering The strength index value STR value the surface deterioration index value INDX value and the delamination index value STAT value will be calculated and displayed in the screen Fig 6 6 shows the screen of display when first hammering is completed and Table 6 1 shows the list of the items and its content
28. phase and used the following Equation 3 7 as an index Here number of a power of velocity can be corrected according the impact velocity 12 Nitto Construction Zr vie 3 7 The active phase has negative effects on measuring the elastic character such as plasticity of the concrete surface due to the deterioration The degree of deterioration on the surface can be calculated from the ratio of the velocity in the active phase V4 to the velocity in the reactive phase Vp 13 Nitto Construction 3 3 Examples of Measured Waveform NOTE The waveforms shown in Table 8 1 are typical examples Various waveforms are measured depending on conditions of the concrete Table 3 1 Examples of Measured Waveform Waveform of impact force when hammering on healthy concrete It can be obtained as nearly bilaterally symmetric waveform at the peak Time s Waveform of impact force when hammering on deteriorated surface of concrete The rising time in the active phase is longer in comparison to the healthy concrete The reason is that the time for the penetration of Time s Rammer with plastic deformation in the deteriorated surface is included In contrast influence of the deteriorated surface is small in reactive phase Waveform of impact force when hammering on the surface of concrete with delamination Case 1 This is the typical waveform that delamination is clearly observed in the
29. s This wizard helps you install software for USB Device i gt ff your hardware came with an installation CD SSE or floppy disk insert it now What do you want the wizard to da install the software automatically Recommended eee eee eee meen eee eee seme ee eeeemee ee eememes Pe eeedsaeeeeeeaseeeemeeeseenemeeenanaenes Install from a list or specific location Advanced Click Next to continue Fig 4 3 Screen for Installing When installing from CD ROM as as e Select Install the software automatically Recommended in the screen above See Fig 4 3 e Click Next button When selecting Install from a list or specific location Advanced e Assign device driver to TUSBOE47 DRIVER sub in the screen below See Fig 4 4 e Click Next button e Installing is completed and CTS 02V4 can be recognized 21 Found New Hardware Wizard Please choose your search and installation options gS Search for the best driver in these locations Use the check boxes below to limit or eqpand the default search which includes local paths and removable media The best driver found will be installed Search removable media floppy CD ROM Include this location in the search DATUSBOE4 DRIVER sub Dont search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarante
30. t waveforms e When estimating the strength of the concrete the data that STAT value appeared cannot calculate the index value accurately 1 7 Nitto Construction 3 5 Allowable range for Each Index Value Note Each index value shown below is the experimental value and only the reference value It is possible to change significantly depending on the types and conditions of the concrete It does not guarantee the condition or strength of the concrete Table 3 2 shows the examples of handling of each index value on the strength estimation To estimate the strength the best waveform for the strength estimation is the STR value calculated from the waveform when INDX value is within the range of 0 9 to 1 8 and STAT value is 0 Strength Estimation Table 3 2 Examples of Handling of Each Index Value on al Estimation INDX A t STAT Value Val 0 90 S IDX lt 1 30 1 50 lt IDX lt 2 00 2 00 S IDX Very suitable Suitable A Not really suitable X Not suitable a o oe puso lt mxs150 O a o A Abo o s x px Eo ks x Surface Deterioration 1 If INDX value ranges between 0 9 1 30 it is judged as unlikely surface deterioration 2 If INDX value ranges between 1 31 1 49 it 1s judged as possible surface deterioration 3 If INDX value is more than 1 50 it is judged as likely surface deterioration Estimation of Degree of Surface Delamination 1 If STAT value is 0 it is ju
31. ults There is no problem if hammering within 10 from the right angle The possible measurement time of CTS 02V4 is approximately twelve 12 hours This possible measurement time is affected by the brands and types of batteries or the climate that it is used If using the instrument for an extended period of time please prepare spare batteries Do not energize over DC6V for the power supply It will lead damages of the electronic circuit Do not bend or pull the cable connecting with the hammer and the measurement instrument It may cause cable disconnection or short circuit CTS 02V4 and the hammer unit are precision instruments Please handle it with care Please avoid storing under the high humidity or extremely high or low temperature Nitto Construction 3 Index Values 3 1 Fundamental Principles The concrete structure is considered as the ideal elastic body and the hammer whose mass is M collides against the concrete surface with the initial velocity Vand the spring coefficient of the concrete K See Fig 3 1 In such case the elastic deformation of the concrete surface is generated by the kinetic energy of the hammer When displacement of the concrete surface generated by collision of the hammer is denoted by x it can be shown in Equation 3 1 from the law of energy equilibrium 1 MV gt KX ax 3 1 According the Hooke s law force F can be shown in Equation 3 2 F kKx 3 2 max max
32. xial location and ccc 1s Measurement number Bl 001 STL 001001 PTL i Area 001 csv 7 ish Mesure 001 csv 5 OverAll 001 csv is WaveForm 001 001 001 csv is WaveForm 001 001 002 csv f WaveForm 001 001 003 csv fih WaveForm 001 001 004 csv is WaveForm 001 001 005 csv is WaveForm 001 001 006 csv i WaveForm 001 001 007 csv fi WaveForm 001 001 008 csv is WaveForm 001 001 009 csv isi WaveForm 001 001 010 csv Fig 4 13 Data copied in PC 4 6 5 Deletion of Data e When selecting the site number that you want to delete in Site Number list box and clicking Delete Site button a warning dialog will be displayed as shown in Fig 4 14 If you select OK all data in the selected site will be deleted If you select Cancel it will return without deletion e It is also possible to delete the data by operation of CTS 02V4 body X Once the data was deleted it is impossible to turn it back DELETE SITE DATA P Deleting Selected Site 1 Data Cancel Fig 4 14 Warning Dialog me Nitto Construction 5 Operating Instruction for CTS 02V4 Body 5 1 Installing of Batteries e Four packs of Size AA batteries are used for the power supply e Open the slide gate of the battery pack Fig 5 1 on the reverse side of the measurement instrument e Install the batteries in the right direction in terms of positive and negative electrodes e It is possible to use different brands or types
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