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Controls 58-C0181/DGT, Instruction Manual

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Manuale di Istruzioni  
Instruction Manual  

58-C0181/DGT Rev. 2 EN 

04/02/2015 

35 

 

3.3

 

Test execution 

 
This chapter describes the user of the digital test hammer to carry out tests. 

3.3.1

 

Criteria to select the impact point 

 
If possible, test vertical surfaces. One should avoid joints, honeycombs and porous areas. 
One should take great care with walls that are less than 10 cm thick and columns that are 
less than 12 cm thick since they could give misleading concrete hammer readings on 
account of their resilience. 

3.3.2

 

Surface preparation 

 
Any plaster or coating covering the concrete should be removed as a first step. 
Slightly uneven surfaces caused by wooden forms can be removed with the carborundum 
stone that is supplied with the instrument (Ref. 7 del in chapter 2.1). 
 

 

 

 

Fig. 3-36

Summary of Contents for 58-C0181/DGT

Page 1: ...MANUALE DI ISTRUZIONI INSTRUCTION MANUAL 58 C0181 DGT Digital Concrete Hammer ...

Page 2: ......

Page 3: ...d controls 14 2 6 Technical specifications 15 3 USE OF THE EQUIPMENT 16 3 1 Charging the batteries 17 3 2 Turning ON the unit and MENUs description 19 3 2 1 UNIT menu 20 3 2 2 STRENGTH menu 20 3 2 2 1 CONVERSION CURVE menu 21 3 2 2 2 Menu SPECIMEN SHAPE FACTOR 23 3 2 2 3 AGE FACTOR Menu 24 3 2 2 4 CORRECTION FACTOR menu 25 3 2 3 STANDARD menu 26 3 2 3 1 USER menu 27 3 2 4 TEST menu 28 3 2 4 1 SPAR...

Page 4: ... 52 This instruction manual is an integral part of the machine and should be read before using the machine and be safely kept for future reference CONTROLS reserves all rights of this manual no part or whole can be copied without the written permission of CONTROLS The proper use of this machine must be strictly adhered to any other use must be considered as incorrect The manufacturer cannot be hel...

Page 5: ...or the compressive strength determination of concrete but with suitable correlations already saved in the instrument it can provide an estimate of in situ compressive strength The EN 13791 suggests the procedure for a specific correlation to the concrete under test The hammer may be used for comparative testing referenced against a concrete with known strength or against a concrete verified as con...

Page 6: ...v 2 EN 2 1 1 Icons appearing in the manual This icon indicates a NOTE please read thoroughly the items marked by this picture This icon indicates a WARNING message the items marked by this icon refer to the safety aspects of the operator and or of the service engineer ...

Page 7: ...ruction Manual 58 C0181 DGT Rev 2 EN 04 02 2015 3 1 2 Manual revision history Revision Date Change description Rev 1 15 January 2015 Manual release Rev 2 04 February 2015 Updated declaration of conformity Re phrased chapter 2 2 ...

Page 8: ...2 2015 58 C0181 DGT Rev 2 EN 4 1 3 Symbols used In this manual and on the equipment itself apart from the symbols indicated on the control panel the following icons are also used Symbol Description Dangerous voltage Conformity to the CE Directive ...

Page 9: ...r who must perform the measurement on the sample to be analyzed in accordance with the instructions provided in this manual The operator is responsible of starting up the equipment performing the test sequence shutting down the equipment and eventually stopping it in case any emergency conditions are met The operator must be trained on the correct use of the machine and the relative safety aspects...

Page 10: ...ifications performed during and after the installation different than those described in this manual The unit is not designed to be used in an explosive atmosphere Installation and any technical intervention must only be performed by qualified technicians authorized by CONTROLS Only authorised personnel can remove the covers and or have access to the components under voltage During normal use if t...

Page 11: ...l not be held responsible for damages caused by the unauthorized use of these functions This will also void the warranty WARNING Failing to perform the recommended maintenance actions or maintenance performed by unauthorized people can void the warranty CONTROLS will not be responsible for maintenance and service actions performed by unauthorized people WARNING Avoid pouring water even accidentall...

Page 12: ...the end of its useful life Therefore at the end of its useful life the owner should dispose of the product in a suitable collection point for electrical and electronic products provided by the local authorities The correct disposal of this product and the subsequent treatment encourages the manufacture of products using re cycled materials and limits the environmental impact of the product caused ...

Page 13: ...nuale di Istruzioni Instruction Manual 58 C0181 DGT Rev 2 EN 04 02 2015 9 1 7 CE declaration This page shows a copy of the CE declaration The original is supplied with the equipment as a separate document ...

Page 14: ...iple and the related technical details 2 1 Instrument description Refer to the next pictures to identify the main parts of the equipment Fig 2 1 Ref Description 1 6 key keyboard 2 128x64 pixel display 3 Micro USB port 4 ON OFF switch 5 Cable for power supply and USB connection to PC 6 Multi voltage frequency battery charger 7 Grinding stone 8 Reset button 8 ...

Page 15: ...gher accuracy and stability of the readings not affected by wear and tear setting of the impact angle no longer required a check of the device reliability can be performed during each impact even without the calibration anvil Pressing the rod of the hammer against the surface to be examined will charge the spring When the rod is completely retracted within the body of the hammer it will automatica...

Page 16: ... battery 1600 mAh capacity Measure and display of the test angle thanks to the integrated triaxial inclinometer Correlation curves between rebound index and compression resistance user selectable Correlation curves between index and compressive strength user customizable Automatic conversion of rebound index and compressive strength equivalent MPa N mm2 kg cm2 psi Calculation of means standard dev...

Page 17: ...Manuale di Istruzioni Instruction Manual 58 C0181 DGT Rev 2 EN 04 02 2015 13 2 4 Identification plate The identification plate is located on the rear side of the isntrument Fig 2 2 ...

Page 18: ... the equipment Use the following buttons to move among the different menus to select the previous item in the menu to select the next item in the menu ENT to activate the selected item and access the submenus ESC to return to the previous menu Buttons and allows moving horizontally among the rows and or select the different buttons on the screen Fig 2 3 ...

Page 19: ...ltage 110 240V 50 60Hz 1Ph Frequancy 50 60 Hz Method of power entry External multirange charger with dedicated cable Battery Ion Lithium 1600mAh Impact energy 2 207 Nm Measuring range From 10 to 100 N mm2 Internal memory 2 Mb Display Monochrome 128x64 pixel Keyboard Membrane 6 key Net weight approx 1 3 Kg Overal dimension with estende rod approx 360 x 80 x 60 mm Environmental conditions Operating ...

Page 20: ...OF THE EQUIPMENT This chapter describes the operator s interface and the execution of a test WARNING We recommend the operator to perform the checks listed in the Maintenance section at the beginning of each working session If you encounter anomalies notify your authorized technicians ...

Page 21: ...ical outlet having the characteristics described in chapter 2 6 Fig 3 1 The charger is constituted by a multi stage transformer with USB connection to connect to the cable provided and from 5 interchangeable plugs The charging cycle is optimized if performed with the instrument off During charging the red LED next to the USB port will remain on Normally the charge takes about 4 hours Charge the ba...

Page 22: ...attery fully charged and in good efficiency the instrument can be used for approximately 7 10 hours before recharge depending on its status this parameter is clearly subordinate to the type of use NOTE The batteries have a small leakage current therefore we recommend to recharge them periodically e g once a month even if the instrument remains unused ...

Page 23: ...side panel Ref 4 in chapter 2 1 a yellow dot denotes the ON position of the switch The display will show a screen with CONTROLS logo and the firmware version of the unit Fig 3 3 Here follows the MAIN MENU Fig 3 4 It allows selecting among the following options UNIT STRENGTH STANDARD TEST MEMORY SERVICE SETTINGS The following chapters describe the different options available ...

Page 24: ...e measures of compressive strength The possible alternatives are N mm2 MPa kg cm2 and psi The desired unit is selected when you press the ESC key to return to the MAIN MENU Fig 3 5 3 2 2 STRENGTH menu Allows you to set various parameters for the calculation of the estimate of compressive strength from the rebound index Fig 3 6 This menu contains the following items in turn ...

Page 25: ...ys Smooth and dry surfaces Fig 3 7 Pressing the ENTER key you can view the coefficients used to determine the conversion curve PORTLAND already saved in the instrument The relationship used to determine the estimate of resistance to compression is the following where Rc is the estimated value for compressive strength I is the measured rebound index A B C and D are set coefficients these coefficien...

Page 26: ...ere f can be configured according to the following formulas Where Rc is the estimated value of the compression strength I is the measured rebound index f is the translation gathered with experimental tests For the calculation of the final estimate of the compressive strength several correction factors can be consider that take into account the shape of the sample The age of the concrete being test...

Page 27: ...actor CUBE 150 factor1 CYLINDER 100x200 factor 0 85 CYLINDER 150x300 factor 0 81 CYLINDER 200x200 factor 0 95 CORE 50x56 factor 1 04 CORE 100x100 factor 1 02 CORE 150x150 factor 1 CUBE 200 factor 0 95 CUBE 300 factor 0 86 Fig 3 10 It is possible to select the type of factor by choosing it from the list and confirm with ENT and it can also be input through the numerical keypad that appears on the s...

Page 28: ...for this coefficient obtained experimentally these values are anyway not binding Età fino a giorni Age up to days 7 50 100 200 400 800 Fattore di età Time factor 1 2 1 0 94 0 87 0 79 0 7 If possible these values should be verified and calculated for each specific type of concrete by means of a campaign of rebound and destructive compression tests on samples properly taken The current value can be ...

Page 29: ...th It is originally set to 1 It can be used to consider external factors for example humidity that might influence the result and is independent from form factors and age The interpretation of this factor is at the discretion of the operator according to his experience The current value can be changed or reset directly to the default value 1 0 Fig 3 13 EDIT it allows entering a coefficient SET 1 t...

Page 30: ...the readings adjusted if necessary to take into account the orientation of the hammer in accordance with the manufacturer s instructions and expressed as a whole number If more than 20 of all readings differ from the median by more than 6 units the entire set of readings shall be discarded NOTE The test hammer 58 C0181 DGT is equipped with an internal inclinometer and therefore does not require co...

Page 31: ...lculated as the median value considering all the readings belonging to this set of measures MEAN the final result of the test is calculated as the average value considering all the reading belonging to this set MEAN W O OUTLIERS the final result of the test is calculated as the average value considering all the reading belonging to this set discarding non significant values according to the criter...

Page 32: ...ating methods SPARE MEASUREMENTS SET OF MEASUREMENTS 3 2 4 1 SPARE MEASUREMENTS menu Allows performing a single measurement and will not take into account the test method previously selected The following screen will be shown after selecting this option Fig 3 19 The instrument is now ready to perform the test After the test the following screen will be shown Fig 3 20 ...

Page 33: ...ously set SHAPE shape of the sample previously sett AGE FACTOR age of the sample previously set CORRECTION FACTOR correction factor previously set The SPARE MEASUREMENT method does not allow saving the test report 3 2 4 2 SET OF MEASUREMENTS menu When selecting the option SET OF MEASUREMENTS the display shows the preliminary number of records in which the result will be saved and the configuration...

Page 34: ...ossible to erase after confirmation the last measurement in the list When the set number of rebounds of the selected method Standard is reached the instrument asks to perform the calculation pressing the button ENT Fig 3 24 The RESULTS shows the progressive number of the test RECORD the mean rebound value the corresponding estimate of the calculated strength resistance and the outcome of conformit...

Page 35: ...OF MEASUREMENTS test method Fig 3 26 It shows the list of test sets stored in the instrument memory For each set it shows the record number the date of storage the number of measurements and the rebound number The buttons and allow scrolling the list faster Selecting of the measurement sets and pressing ENT the list of possible actions appears on the screen Fig 3 27 ...

Page 36: ...ment The rows can be scrolled horizontally by using the buttons and Fig 3 28 3 2 5 2 ERASE Allows erasing the selected set of measurements Confirmation is requested before proceeding Fig 3 29 3 2 5 3 ERASE ALL Allows erasing ALL the set of measurements stored in the memory Confirmation is requested before proceeding Erased measurements cannot be restored Fig 3 30 ...

Page 37: ... 2 7 SETTINGS menu This menu contains entries for the configuration of the user interface and internal clock The settings are retained even after power off Fig 3 31 3 2 7 1 LANGUAGE The language selected from those available is used after the restart of the hammer Use the ESC key to keep the current selection Fig 3 32 3 2 7 2 KEYBOARD SOUND Enables disabile the tone when pressing a button of the k...

Page 38: ...0181 DGT Rev 2 EN 34 3 2 7 3 DATE AND TIME Allows setting the clock of the instrument It allows entering DAY MONTH YEAR HOURS MINUTES SECONDS Press ESC to select the next parameter to set Fig 3 34 At the end it requires confirmation to set the clock Fig 3 35 ...

Page 39: ...s and porous areas One should take great care with walls that are less than 10 cm thick and columns that are less than 12 cm thick since they could give misleading concrete hammer readings on account of their resilience 3 3 2 Surface preparation Any plaster or coating covering the concrete should be removed as a first step Slightly uneven surfaces caused by wooden forms can be removed with the car...

Page 40: ...0 W grinder be used with a grinding wheel diameter of 120 mm approximately and at a speed of 6000 r p m 3 3 3 Uso of the test hammer 1 Turn ON the instrument via the switch of the side panel Ref 4 in chapter 2 1 2 From the MAIN MENU select the option TEST and press ENT 3 Select the type of measurements to perform SPARE MEASUREMENT or SET OF MEASUREMENTS 4 Press ENT until the message READY is shown...

Page 41: ... get to the end of the stroke of the rod the test hammer will strike 8 After the stroke retract the test hammer until the rod is fully extracted The screen will show the test result Single test Set of measurements Fig 3 39 9 Use the arrows on the keyboard to scroll among the different parameters on the screen 10 Repeat this procedure for the number of strokes requested by the selected STANDARD ref...

Page 42: ...g the program Here are the computer requirements to properly run the software Microprocessor AMD Intel 1 6Ghz or higher Operating system Microsoft Windows XP 7 8 32 or 64 bit RAM memory 500Mb or higher Hard drive at least 300Mb of free space CD drive To install the program 1 Load the CD into the drive of the PC 2 In case the installation does nota start automatically run the file SETUP on the CD n...

Page 43: ...al 58 C0181 DGT Rev 2 EN 04 02 2015 39 4 Click on the icon to proceed Fig 3 42 5 The installation will proceed automatically and the following screen will be shown at the end Fig 3 43 6 The installer of the program had created an to run it ...

Page 44: ...lick on the icon created by the installer to run the program the main screen will be shown Fig 3 44 3 4 2 1 Main screen Connect the test hammer to the PC using the USB cable provided and turn the instrument ON The status on the PC screen will be CONNECTED Fig 3 45 The following tools are available on the toolbar Fig 3 46 Connected ...

Page 45: ...he test Impacts number of strokes carried out Results measured rebound index Angles referred to each measurement taken measured by the internal inclinometer Average rebound mean value of the measured rebound index Standard deviation calculated from the gathered rebound indexes Average angle mean value of the angles measured by the internal inclinometer Standard reference standard selected for the ...

Page 46: ...ing full data for the test both in graphical and tabular format Fig 3 48 3 4 2 3 DATE AND TIME UPDATE menu Selecting the icon allows synchronizing the clock of the instrument with the clock of the PC 3 4 2 4 SAVE menu Selecting the icon allows saving the test data stored in the instrument in a file csv format ...

Page 47: ...2 EN 04 02 2015 43 3 4 2 5 OPEN menu Selecting the icon allows opening a csv file previosuly created 3 4 2 6 GENERATE REPORT menu Selecting the icon allows creating a test report with all test data in tabular format use web page format or text format Fig 3 49 ...

Page 48: ...ONTROLS technical personnel CONTROLS will not be held responsible for damages caused by the unauthorized use of these functions This will also void the warranty 3 4 2 8 ADVANCED Not active Allows performing the instrument calibration WARNING The present menu is reserved to CONTROLS technical personnel This procedure shall not be activated unless specifically authorized by the CONTROLS technical pe...

Page 49: ...enance to the equipment is responsibility of the purchaser and must be performed as stated by this chapter Failing to perform the recommended maintenance actions or maintenance performed by unauthorized people can void the warranty WARNING Failing to perform the recommended maintenance actions or maintenance performed by unauthorized people can void the warranty CONTROLS will not be responsible fo...

Page 50: ...of the operator s command Operator Before every working session Check the inclinometer see chapter 4 2 1 Operator Once a year or every time the results are not reliable Check the calibration with the test anvil see chapter 4 2 2 Operator Once a year or every time the results are not reliable General inspection Operator Weekly Cleaning of the mechanical parts see chapter 4 3 Authorized service engi...

Page 51: ...by the tilt sensor possibly using a calibration anvil the display shows the result as follows NORMAL if the speed is in the expected range from 90 to 110 of the reference speed stored during calibration SLOW speed lower than the expected range lower than 90 of the reference speed FAST speed higher than the expected range higher than 110 of the reference speed When the speed is outside the expected...

Page 52: ...calibration anvil normally 81 Fig 4 3 This test includes 5 preliminary strokes and 5 verification strokes The display will show the number of strokes still to be carried out and for those of the verification phase the resulting rebound index At the end the display will show the result of the test Fig 4 4 Fit the instrument rod into the calibration anvil to take the measurements Fig 4 5 ...

Page 53: ... axis of the instrument and the horizontal plane Change the angle and check that the value shown follows the movements It also shows the voltage of the internal battery Fig 4 6 4 2 4 RESET TO FACTORY menu Allows you to reset all configuration parameters to their default values Parameters involved are form factors curve coefficients and corrective factors for the calculation of the strength ...

Page 54: ...move the two part ring 14 Unscrew the cap 1 and remove the spring 12 and all the moving parts NOTE To extract the latter the hammer 7 must be released from the hook 17 2 Strike the plunger head 11 a few light blows with the hammer 7 separating them from the guide rod 8 and the spring 12 Release the spring 10 only at the hammer end 7 leaving it hooked on to the sleeve 13 at the other end 3 Clean th...

Page 55: ...ut the resolution of the most common problems that can occur when using the equipment WARNING Refer to qualified service organization authorized by CONTROLS to carry out service and maintenance procedures CONTROLS has not to be held responsible for damages to the equipment and or injuries to personnel in case the above is not strictly followed ...

Page 56: ...fuse connected in seried to the batteries has been triggered e g a different battery charger has been used and or the instrument has been dropped etc Turn OFF the isntrument via the its switch Connect the instrument to its battery charger the ine supplied with the instrument Disconnect the battery charger Turn ON the instrument via its switch The maximum duration of the battery charge decreases dr...

Page 57: ...Manuale di Istruzioni Instruction Manual 58 C0181 DGT Rev 2 EN 04 02 2015 53 Notes ...

Page 58: ...Manuale di Istruzione Instruction Manual 04 02 2015 58 C0181 DGT Rev 2 EN 54 Notes ...

Page 59: ...Manuale di Istruzioni Instruction Manual 58 C0181 DGT Rev 2 EN 04 02 2015 55 Notes ...

Page 60: ...Manuale di Istruzione Instruction Manual 04 02 2015 58 C0181 DGT Rev 2 EN 56 Notes ...

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