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Testing Procedure

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Another option is to attach the accelerometer to the surface of the
specimen without using the accelerometer support. It can be
attached to the specimen using an adhesive mounting base. Wax
is usually provided with the system to attach the accelerometer on
the surface of the specimen (as shown in Fig. 19).

Figure 19: Testing setup using the accelerometer support

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Содержание V-E-400

Страница 1: ...V E 400 Emodumeter Operator s Manual Original Instructions Revision February 2017 ...

Страница 2: ......

Страница 3: ...chanical electronic photocopying recording or otherwise without prior written permission of James Instruments No patent liability is assumed with respect to the use of the information contained herein Moreover because James Instruments is constantly striving to improve its high quality products the information contained in this manual is subject to change without notice Every precaution has been t...

Страница 4: ...e and number of data points 11 Trigger Level 12 Review Menu 13 System Setup 14 Changing Date 14 Erase Memory 16 Display Cursor 17 Battery Operation 18 Battery Charge 19 Simple Guidelines for Battery Maintenance 20 Upload Menu 21 Test Bench 22 Accelerometer 23 Testing Procedure 25 Longitudinal Frequency Mode 25 Transverse Frequency Mode 29 Torsional Frequency Mode 32 Emodulinx Introduction 35 Featu...

Страница 5: ...ection Menu 46 Review Menu 47 Upload Menu 48 FFT Menu 50 Tips and Troubleshooting 51 Sampling Frequency and frequency resolution 51 Contact accelerometer 51 Trigger level 51 Gain 51 Missing Drivers Emodulinx 52 Safety 54 Specifications 55 Sales Numbers 55 Warranty Information 56 Repair Policy 61 ...

Страница 6: ... Resistance of 2008 Concrete to Rapid Freezing and Thawing EN 61000 6 3 Electromagnetic compatibility EMC Generic 2007 standards Emission standard for residential commercial and light industrial environments EN 61000 6 2 Electromagnetic Compatibility EMC 1999 Part 6 2 Generic Standards Immunity for Industrial Environments I hereby declare that the equipment named above has been designed to comply ...

Страница 7: ... test bench for longitudinal flexural and torsional resonance measurements to take specimens up to 28 x 6 x 6 a miniature accelerometer is used as a receiver and a set of 6 hardened steel balls are used to generate the vibrations on the sample by a mechanical impact In order to obtain the resonance frequency of the sample the received signal is analyzed in the time domain and the frequency spectru...

Страница 8: ...Instrument Contents List 2 www ndtjames com Instrument Contents List Each Emodumeter comes with the following items included in the carrying case Figure 1 Emodumeter Contents ...

Страница 9: ...t Resonant Frequency Tester encased in a durable protective case 3 Instruction Manual Operating instructions for Emodumeter 4 AC Power Adapter Used to power the Emodumeter and recharge the unit 5 240 VAC Adapter Plug 6 USB Cable Serial cord used to connect the Emodumeter to a PC to upload data 7 Accelerometer Pickup Cable Connected to Sensor Accelerometer ...

Страница 10: ...Testing Bench Contents List 4 www ndtjames com Testing Bench Contents List Each Emodumeter comes with a testing bench which has the following items included Figure 2 Testing Bench Contents Contents List ...

Страница 11: ...er Cushions 4 5 Mounting Bolts Slide on Mounting Rod 6 Sensor Mounting Rod Assembly 7 Knurled Clamp Nuts Used to Hold Sample and Item 11 8 Pick Up Mount Bracket Assembly Used to Hold Sensor Accelerometer 9 Torsion Block 2 Used with Item 12 10 Impactor Set 6 8 10 12 14 and 16mm 11 Clamp Bar Used to Hold the Sample in Place 12 Torsion Block 1 Base For Sensor Placement along Concrete Sample Used with...

Страница 12: ...Emodumeter Overview 6 www ndtjames com Emodumeter Overview The following is an overview of all of the external features of the Emodumeter Figure 3 Emodumeter Overview ...

Страница 13: ...ues needed for calculations The left arrow This key allows you to scroll through various settings The right arrow This key allows you to scroll through various settings The Enter key Pressing this key allows you to choose main menu selections The enter key also allows you to prepare the Vu Con for testing mode Pressing the enter key once will give you a message Emodumeter is Ready Pressing the key...

Страница 14: ...Menu Layout 8 www ndtjames com Menu Layout Figure 4 Emodumeter Function Flow Chart ...

Страница 15: ...n enable is On mode the unit will trigger with the impact of the hardened steel ball on the surface of the sample Caution the system can be triggered with another event different than the impact of the steel ball on the sample Once the unit is in the mode Run enable is On any contact with the specimen cable or accelerometer can trigger the instrument with a meaningless signal Figure 5 Emodumeter s...

Страница 16: ...obtain one of these values according to the testing Mode selected the output of the test and will use the user input value for the other variable The other option that the user can control in the Setup Menu is the shape of the specimen According to the user selection different parameters related to the dimensions of the specimen will appear in the same screen The user can change the values using t...

Страница 17: ...ens The smaller the sample the lower the gain shall be The gain can be adjusted from 1 to 500 The gain is the ratio of an output quantity to an input quantity The gain options are as follows 1 5 10 25 50 100 250 and 500 Sampling rate and number of data points The user can select the sampling rate and the number of points to sample the signal according to the specific applications or standards requ...

Страница 18: ... allow the user to identify frequencies with the needed accuracy and in the required range of frequencies Trigger Level The Trigger level is adjusted in percentages 10 20 30 40 50 60 70 80 and 90 Pressing the escape keys the system returns to the main menu so test can be started Lower trigger level should be used when testing small samples The Trigger Level should be set to a level that the system...

Страница 19: ...m 13 Review Menu The review menu allows the user to review previously recorded test results All the results and parameters used in the test are presented in this menu The user can review the FFT or the time domain signal as well ...

Страница 20: ...figuration The user can change the date on the instrument erase data or change the display colors It also allows monitoring the battery operation The Emodumeter can only be set to use the English language Changing Date Press the up or down key until you get to the system setup menu option Figure 8 Press Enter the setup Menu sub screen should appear ...

Страница 21: ...n minute has been set Month 10 Press the right or left arrow keys to set the proper month press the down arrow key when month has been set Date 12 Press the right or left arrow keys to set the proper date press the down arrow key when date has been set Year 2003 Press the right or left arrow keys to set the proper year You have properly set the correct date and time of 10 12 2003 1 00 PM press the...

Страница 22: ...he main menu screen Erase Memory Press the up or down key until you get to the system setup menu option Press Enter The Setup Menu sub screen should appear Scroll through the Setup menu using the up or down arrow key Select the Erase Memory option by pressing Enter The display should read the following Figure 11 ...

Страница 23: ...ng the Escape key will return you to the Main Menu Screen Display Cursor Press the up or down key until you get to the system setup menu option Press Enter The Setup Menu sub screen should appear Scroll through the Setup menu using the up or down arrow key Select the Display option by pressing enter Pressing the left or right arrow keys will give the option to choose Black Lines or White Lines ...

Страница 24: ...then the battery s life At full charge the bottom of the display will show BATTERY 100 Note This value may be inaccurate if the battery counters were reset without properly charging the unit The battery status can be viewed in the System Menu under the Battery Operation mode Fig 14 15 When the charger is supplying power to the unit the battery is charging and the charge counter Charge CTR will inc...

Страница 25: ...then to the charger input on the unit s front panel Although it is recommended for the unit to be OFF during a charge the user can monitor the charging process in the screen above 2 If the Charge counter slows to a stop and does not increase this is an indication the charge is complete The battery now has a full charge and needs to be reset To do BATTERY STATUS DISCHARGE CTR xxxx CHARGE CTR xxxx D...

Страница 26: ...lows for 4 6 hours of continuous field testing 5 To extend the battery s run time in the field to turn OFF the background light Simple Guidelines for Battery Maintenance 1 When allowed to discharge and charge regularly the end user will experience a better Battery life span or cycle 2 Lithium ion batteries do not need to be fully charged as the charger can aid its performance 3 Shallow discharges ...

Страница 27: ...at room temperature 9 Replacing or repair of the battery should be done by a trained James Instruments technician Please follow the repair procedure found in the manual check the Table of Contents in your manual Upload Menu Connect the unit to the correct serial port of the P C using the supplied serial cable Press the up or down key until you get to the system Upload menu option Press Enter The U...

Страница 28: ...ll be ready to be transmitted to the PC Test Bench Center support the basic support has been arranged for the accelerometer to be on the axial center line of a 6 x 12 cylinder or 6 x 6 square section specimen For 4 dia or 4 x 4 section a spacer marked 4 is placed on the basic support and for 3 dia or 3 x 3 specimens a second spacer marked 3 is added to the 100 spacer Torsion spacer blocks spacer b...

Страница 29: ...ld be touching the specimen The use of the accelerometer support allows placing the accelerometer at the required location The accelerometer should be inserted through the rubber ring and then the cable should be connected to the accelerometer microdot connector The accelerometer does not need to be screwed to the mounting stud base when using it with the accelerometer support The testing setup us...

Страница 30: ...e of the specimen without using the accelerometer support It can be attached to the specimen using an adhesive mounting base Wax is usually provided with the system to attach the accelerometer on the surface of the specimen as shown in Fig 19 Figure 19 Testing setup using the accelerometer support ...

Страница 31: ... length of the specimen m d diameter of cylinder m t b dimensions of cross section of prism m t being the driver or impact direction in which it is driven Note It is important to distinguish between t and b for transverse frequency G assumed Modulus of Rigidity value in order to compute μ Usually the user has to input the value of G in G Pa obtained in a previously run Torsional test E assumed Mod...

Страница 32: ...e the elastic constants of the specimen If only frequency values are required the system will assume default values and the elastic constants are not going to have any meaning When testing for the fundamental longitudinal resonant frequency there is one nodal point at the center on the longitudinal direction of a prism or cylinder and the specimen should be placed on the test bed center support at...

Страница 33: ...sed to assure good contact between them a coupling agent may be required to assure intimate contact The support may now be locked by using the knurled clamping screws The accelerometer may also be placed on the surface of the specimen without using its support It could be attached on the surface of the specimen by using wax and pressing it against the surface as described in the Review Menu chapte...

Страница 34: ...2 to 4 different screens For concrete specimens the resonance frequency will generally be in the range 1 kHz to 10 kHz depending on the dimensions of the specimen see Figure 22 Figure 22 Range of longitudinal fundamental resonant frequencies of concrete prism and cylinder specimens The system will calculate the dynamic Poisson s ratio according to eq ii using the obtained value of E from the Longi...

Страница 35: ...ould be µ 0 17 The system will calculate the dynamic Young s Modulus of elasticity according to e q iii using obtained and computed parameters M mass of the specimen kg n fundamental transverse frequency Hz t b dimensions of cross section of prism m t being in the direction in which it is driven distinguish between t and b is important for transverse frequency C 1 6067 L T d 4 Ns kg m for a cylind...

Страница 36: ... enable is On will appear on the screen Then tap the specimen using a hardened steel ball the instrument will trigger and a signal will appear in the screen In order to obtain the spectrum of the signal and the resonance frequency the down arrow key should be pressed On the screen will appear the message calculating spectrum please wait It will take a few seconds The system will obtain the fundame...

Страница 37: ...1 28 1 29 1 29 0 07 1 38 1 38 1 39 1 39 0 08 1 48 1 49 1 49 1 5 0 09 1 6 1 61 1 61 1 62 0 1 1 73 1 74 1 75 1 76 0 12 2 03 2 04 2 05 2 07 0 14 2 36 2 38 2 39 2 41 0 16 2 73 2 75 2 77 2 8 0 18 3 14 3 17 3 19 3 22 0 2 3 58 3 61 3 65 3 69 0 25 4 78 4 84 4 89 4 96 0 3 6 07 6 15 6 24 6 34 Figure 24 Values of Correction Factor T Note Values for Poisson s ratio for concrete normally vary between about 0 1...

Страница 38: ...ng the obtained value of E from the Transverse test and assuming a value of G that shall be input before to run the Transverse test In order to obtain a meaningful result of Mu it is recommended to run a Torsional test before to obtain a value of G and then input this value as a parameter to compute the Poisson s ratio Mu E 2G 1 ii E Dynamic Young s Modulus of elasticity obtained according eq iii ...

Страница 39: ...LR A N s2 kg m2 R 1 for a circular cylinder R 1 183 for a square cross section prism R a b b a 4a b 2 52 a b 2 0 21 a b 6 for a rectangular prism whose cross sectional dimensions are a and b m with a less than b A cross sectional area of test specimen m2 Size of the specimen inches Approximate range of Frequency Hz 6 x 6 x 30 1150 1800 6 x 6 x 28 1200 1920 4 x 4 x 30 1150 1800 4 x 4 x 20 1800 2700...

Страница 40: ...eter to compute the Poisson s ratio Mu E 2G 1 ii G Dynamic modulus of rigidity obtained according eq iv E Dynamic Young s Modulus of elasticity input by the user the recommended value of E is the obtained in previous Longitudinal or Flexural tests Figure 27 Torsional resonance frequency testing setup rectangular side view Figure 28 Torsional resonance frequency testing setup circular front view ...

Страница 41: ...ts can also be uploaded and graphed to further analyze the Emodumeter data The addition of the remote control functionality makes the Emodumeter a very powerful tool Features The ability to execute a test remotely and graph FFT The ability to review previous test parameters The ability to adjust Test menu Setup menu and E Mu menu parameters These items include the amplifier gain the picture rate t...

Страница 42: ...all menus and settings are the same as the ones found in the Emodumeters menus and settings Consequently the same basic operation and testing procedure mentioned earlier in this manual will be used for Emodulinx Additionally any settings that are changed in Emodulinx will automatically save in the Emodumeter Figure 29 Emodulinx Overview ...

Страница 43: ...rmed and shape of the concrete sample see page 10 Selection Use this menu to select the testing parameters see page 11 12 Review Use this menu to review previously recorded test results see page 13 Upload Use this menu to upload data from the Emodumeter to a PC see page 20 FFT Use this menu to graph FFT see page 13 ...

Страница 44: ...rposes To install the software on your PC follow these instructions To install the software 1 Insert the Emodumeter PC Software CD into the CD ROM drive 2 If the CD does not load the setup automatically go to My Computer double click on the CD under devices and double click on setup exe Figure 30 Installation File Location ...

Страница 45: ...ames com 39 3 The InstallShield Wizard checks for the operating system you are using Figure 31 InstallShield Wizard 4 The InstallShield Wizard dialog appears Click Next to proceed Figure 32 InstallShield Wizard ...

Страница 46: ...ww ndtjames com 5 Accept the terms in the license agreement and click Next Figure 33 License Agreement Screen 6 Complete the customer information fields and click Next Figure 34 Customer Information Screen ...

Страница 47: ... com 41 7 The InstallShield Wizard confirms your installation Click Install to continue Figure 35 InstallShield Wizard Confirmation 8 The installation progress screen appears Figure 36 Installation Progress Screen ...

Страница 48: ...tallation has completed the following message will appear Click Finish to close the dialog Figure 37 InstallShield Wizard Completed 10 The Emodulinx shortcut appears on the desktop as well as the Start Menu Figure 38 Emodulinx Shortcut ...

Страница 49: ...ne end of the USB cable to the PC and the other end to the Emodumeter When connecting to the Emodumeter push the connector down firmly until it clicks This will ensure that the Emodumeter is properly connected After connecting the Emodumeter you may run and use Emodulinx If you are experiencing difficulties refer to the Tips and Troubleshooting section of this manual page 51 ...

Страница 50: ...enu Figure 39 Emodulinx Setup Mode Select the radio button of the type of test you wish to perform Shape Select the radio button that best describes the shape of the concrete sample that you wish to test Mass Specify the mass of the specimen here ...

Страница 51: ...u Transverse E Only Specify the Dynamic Poisson s Ratio here default is 17 b a a b Prismatic Torsional G Only Specify the cross sectional dimensions of the prism where a is less than b b t Prismatic Longitudinal E and Prismatic Transverse E Only Dimensions of the prismatic cross section with the t dimension being the direction of impact ...

Страница 52: ...y the received signal See Tips and Troubleshooting for more information page 51 Sample Rate Use this setting to adjust the sampling frequency Sample Size Use this setting to specify the number of data points sampled Trigger Level Use this setting to adjust the vibration sensitivity of the accelerometer ...

Страница 53: ...eview Number Adjust this number to upload a summary of a given test 1 being the first test that is stored on the Emodumeter Upload Review Click this button after changing the review number to refresh the display window with a review of that particular test ...

Страница 54: ...stored on the Emodumeter Upload Test Click this button after changing the test number to upload the stored data of that particular test The upload takes a few minutes A bar will display underneath that shows that the upload is in progress and it will disappear when the upload is complete Save Test Click this button to save the uploaded test to your PC ...

Страница 55: ...www ndtjames com 49 Upload All Tests Click this to upload all stored tests on the Emodumeter Save All Tests Click this to save all tests from the Upload All Tests operation to your PC ...

Страница 56: ...FFT Menu Run Enable Check this box right before you are ready to test so the device can begin gathering data After performing the test the FFT graph eventually displays in Emodulinx Save FFT Click here to save the current FFT data to your PC ...

Страница 57: ...s of 20 kHz or higher are recommended Contact accelerometer It is important to place the accelerometer in contact with the specimen Checking accelerometer contact before impact the specimen with the hardened steel ball is recommended Coupling between accelerometer and specimen assures proper testing results For more information please refer to the recommendations presented in the Operating Instruc...

Страница 58: ...signal seems to be cut off by the frame of the plot the gain should be reduced On the other hand when the signal on the screen is very small in relationship to the plot frame the gain should be increased The ideal gain is the one where the waveform should be horizontally center in the graph and the features of the waveform can be easily seen on the screen Figure 44 Time domain signal obtained usin...

Страница 59: ...ce Manager appear with a small yellow exclamation point this means that the device was detected but there are no supported drivers available on the PC 3 Make sure the Emodulinx install CD is inserted Right click the device icon with the exclamation point and select Update Driver Software Select Browse my computer for driver software Click the Browse button and navigate to your CD drive Double clic...

Страница 60: ...54 www ndtjames com Figure 46 Device Manager Safety Do not submerge unit in water This can cause electrical shock ...

Страница 61: ...60 mV g 0 979 mV m s2 Battery 14 4 Volt 4 8 hours continuous use Display 320 by 240 backlit for daylight use Storage 200 plus readings Software Requirements Windows compatible 9x me 32MB RAM Impactors Set of 6 hardened steel balls Operating Temp Range 0 C to 40 C Sales Numbers Part Description V E 400 Emodumeter Standard Test System V E 410 Emodumeter Instrument only V E 1020 Accelerometer V E 103...

Страница 62: ...se Warranty shall not apply where the equipment manufactured or supplied has been subject to accident alteration misuse abuse improper storage packing force majeure improper operation installation or servicing In addition the following shall constitute the sole and exclusive remedies of Buyer for any breach by James of its warranty hereunder a New Products James warrants the equipment manufactured...

Страница 63: ...livery of the subject item s of the original purchaser of such item s The price for each such extended limited warranty coverage period shall be as determined by the Company from time to time and all such purchases of any extended warranty coverage periods shall only be effective upon a completed purchase order and payment directly between James and the original purchaser of any such item s The ex...

Страница 64: ...king condition to be capable of being adjusted to meet James printed specifications if any for accuracy and performance as to the particular model type during the period of warranty applicable as stated above ii For Repair Services James warrants repair work performed under the direct control and supervision of James personnel for a period of three 3 months from the date repairs are completed eith...

Страница 65: ...rt of the contract between Buyer and the Company The Company prices can not include the cost of any related inspections or permits or inspection fees 4 Notices Notice by either the Company or Buyer will be made only by facsimile or similar electronic transmission effective on the first business day after confirmed receipt or by letter addressed to the other party at its address as provided in this...

Страница 66: ...to submit to the personal jurisdiction of the federal and or stale courts silting in Chicago Illinois U S A and agree that such courts may be utilized if necessary to obtain injunctive or any other relief The Hague Convention and the United Nations Convention on Contracts for the International Sale of Goods shall not apply to the construction or interpretation of these Standard Terms and Condition...

Страница 67: ...ve the option of paying an express service fee of 10 percent of the purchase price of said instrument plus the repair cost With this service you can receive the instrument back within 3 working days in the USA 5 working days for Europe International repair shipments must contain a commercial invoice listing the instrument being returned and must contain the words Country of manufacture USA Instrum...

Страница 68: ...es com James Instruments Inc 3727 N Kedzie Chicago IL 60618 4503 USA Tel 773 463 6565 Fax 773 463 0009 James Instruments Inc Europe Windmolen 22 7609 NN Almelo The Netherlands Tel 31 0 548 659032 Fax 31 0 548 659010 ...

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