QS3 - demeq.com
Contents
1. Do not mix new and old batteries Always replace both batteries Rechargeable batteries type NiMH can be used but will result in less time of continuous operation 4 Chapter 1 QS3 User Manual j Do not remove batteries while the unit is powered as this may affect the Data Logger See Apendix Additional information Error Messages 1 3 Connecting the transducer The QS3 has two type Lemo 00 connectors located on top of the unit Because this is the standard for most dual crystal probes you could basically connect any probe to your QS3 Keep in mind that the gain may need to be adjusted when changing probes To connect the probe simply align any of the male connectors located at the end of the transducer cable to any of the female connectors located on the gauge and press gently until connected To release the probe hold the knurled section on the male connectors and pull gently away from gauge until released Figure 1 5 Connecting the transducer Chapter 1 5 QS3 User Manual 1 4 The Q key The has three functions 1 When the unit is off touch for 2 seconds to power on the unit 2 When the unit is on touch for 2 seconds to shutdown the unit 3 With the unit on making short touches to the will activate special functions described in each chapter of this manual 1 5 Display backlight illumination and contrast Backlight illumination and contrast options can be changed from any2. Gain and other more general settings such as Beep Keypad Sensitivity and AutoOff time Hold Last a Unit Info Figure 3 13 Unit configure menu 3 6 1 Select language Language Touch Wa on Language which is also identified with a flag to view available language options Use the cursor keys to scroll available nglish Spanish language options and touch to select Portuguese Touch to save and exit this menu Figure 3 14 Language menu options 22 Chapter 3 QS3 User Manual 3 6 2 Set keypad sensitivity Key Sens This option allows you to set the keypad sensitivity The higher the number is that you set here the more sensitive the keypad will be Touch on Key Sens and use the AIV keys to change the keypad sensitivity Touch to save and the keypad will already be working with the new sensitivity level Key Sense ies Key Sense SS or Figure 3 15 Key sensitivity and confirmation screens To confirm the change in sensitivity touch Ol If you touch any other key or the counter that appears on your screen reaches 0 0 the sensitivity will return to its previous setting The factory default setting is 50 Under special conditions we suggest that the sensitivity level be changed Tips L If the unit will be operated using security gloves we lt recommend that the sensitivity level be raised To make the keypad harder simply lower the sensitivity level In applications where the front
3. coupling gel as it may be added to the thickness value of the actual test piece being measured Always do the zero calibration using the calibration disk located in the front of the unit particularly when changing transducers Know the velocity of the material you will be measuring or have a reference test piece made of the same material you will be measuring and of a known thickness value so that you can precisely determine the material velocity based on Its thickness Gain levels are set from factory with the optimal values that correspond to the transducer that was shipped with your unit When a transducer is changed gain will usually need to be adjusted to optimize transducer functionality Apendix QS3 User Manual Technical Specifications Measuring principal Measuring range Transducer frequency Measuring frequency Pulser tension V Path Units Resolution Material velocity Calibration Alarms Languages Datalogger Conecction to PC QS3 DL only Display Keypad Battery life Operating temp Enclosure Weight Apendix Pulse Echo 0 6 mm to 500 mm Pulse Echo 2 to 10 MHz 4 Hz Adjustable 20 V to 210 V Automatic correction Millimeters and Inches 0 01 mm from 0 60 to 99 99 mm 0 1 mm from 100 0 mm and above 0 001 in from 0 040 to 9 999 0 01 in from 10 00 in and above 100 to 19999 m S 3 937 to 787 3 in ms Auto 1 Point Minimum Audible and visual English Spanish Portuguese Up to 500
4. screen in the unit 1 5 1 Es backlight illumination Touch to change the backlight illumination Figure 1 6 Backlight illumination options 6 Chapter 1 QS3 User Manual 1 5 2 Disolay contrast When you touch the white dot located in the center of the vertical scrolling bar between the AIV keys a contrast window will open Move your finger towards the top and or bottom of the dotted line to adjust the contrast on your display Figure 1 7 Display contrast adjustment 1 6 Locking and unlocking the keypad To lock the keypad place your finger on the white dot located in the center of the horizontal scrolling bar between the ES ES keys Move your finger to the right following the dotted line and a window on the unit display will open with the word Lock Continue moving your finger in the same direction until you enter locked mode The window on the display will close and the locked keypad indicator will show on the top right corner of the unit screen Locked Indicator AZ T rr OTA ie OT dhe a gt lock M ok fh 59882 6 50 59882 6 50 mp Camp Figure 1 8 Locking the keypad 59882 6 58 Chapter 1 7 QS3 User Manual Sliding the finger to the left will unlock the keypad AT er T NAN s Afr AN Unlock EM Gne f e fh 59882 6 50 59882 6 50 59907 6 50 oe OS Figure 1 9 Unlocking the keypad Important j The keypad can only be locked and unlocked in the
5. 0 values Manual and Continous capture modes View data in grid or graphic formats USB native or RS232 optional Graphic LCD 128 x 64 pixels with LED backlight illumination and digital contrast adjustment Touch sense with no mechanical parts and sensitivity adjustment 100 hours with 2 each type AA batteries 10 C to 50 C High impact ABS with rubber sides Size is 78x117 x24 mm 200 g with batteries QS3 User Manual Additional information Unit maintenance The QS3 was developed and manufactured for years of trouble free operation and even though the unit does not require special care the following precautions should be considered Avoid contact with corrosive and abrasive substances Do not clean the unit with solvents e Do not leave the unit display exposed to direct solar light for prolonged periods of time as this could damage the display e Remove the batteries if the unit will be stored for an extended period of time e Remove the transducer using the connectors and not the cable e Do not twist or strangle transducer cable e Do not expose the unit to temperatures below 10 C 14 F or above 50 C 122 F Apendix QS3 User Manual QS3 Accessories Apendix QS3 User Manual Error messages Error messages may eventually open on your unit screen and are informational only If one of these messages opens on your display follow the instructions described below and if the pro
6. QS3 has a low alarm that alerts the operator when a measurement falls below the value set for the low alarm Touch on Alarms to open the alarm menu options Touch on Low to open the numbers x editor where you can set the low alarm value eep id using the cursor keys Touch to save and return to the previous menu Screen Light 0 K Figure 3 5 Alarms menu options Any of the following alarm types can be selected Beep Audible intermittent alarm type Screen Visible alarm that causes measurements to be displayed in dotted instead of regular numbers Light Visible alarm that activates the display backlight illumination causing it to flash Chapter 3 17 QS3 User Manual 3 5 Memory menu Henory Select Memory from the main menu to view all memory menu options The options in this menu will be different depending on your QS3 model In the QS3 B stored values can be viewed on the unit display but they cannot be sent to a PC or a printer Values can only be sent to a PC via USB with the QS3 DL using DataCenter software z m iew data mA onnect Erose ALL View data Capture Manu Erose ALL Free 1995 Capture Hanu Free 1995 QS3 B QS3 DL Figure 3 6 Memory menu options based on unit model 3 5 1 Connecting to a PC with Connect DataCenter In the QS3 DL memory menu touch on Connect to enter the waiting to connect to PC mode Touch to exit and cancel the connection onnect pa Conne
7. User Manual English Ultrasonic Thickness Gauges GE QS3 Models B DL www demeg com QS3 User Manual Ultrasonic Wall Thickness Gauges P N QSD 301 ENG Rev 3 2012 Index Chapter 1 Chapter 2 Chapter 3 1 1 1 2 1 3 1 4 1 5 1 6 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 4 3 5 QS3 User Manual First Steps Know the QS5 1 1 1 Front panel 1 1 2 Connectors Install or replace batteries Connecting the transducer The Q key Display illumination and contrast 1 5 1 Display backlight illumination 1 5 2 Display contrast Locking and unlocking the keypad Measuring with the QS3 Measuring screen Keys in the measuring screen Zero calibration Auto Changing the material velocity 2 4 1 Change to a known velocity 2 4 2 Change velocity using a known thickness value Menu system and editing Instructions on using the menu system Main menu Change measuring unit Alarm settings Memory Menu 3 5 1 Connecting to a PC with DataCenter 3 5 2 View data 3 5 3 Erase memory 3 5 4 Capture modes 3 5 0 Free memory NN ODD HD UWN gt 10 12 13 13 13 15 16 16 17 18 18 19 20 21 21 QS3 User Manual 3 6 General configuration options 3 6 1 Select language 3 6 2 Set keypad sensitivity 3 6 3 Adjust gain 3 6 4 Set auto off time 3 6 5 Adjust display contrast 3 6 6 Beep activation 3 6 7 Hold last value 3 6 8 Unit information Apendix Tips on how to measure corre
8. aterials and their velocities Use the cursor keys to scroll the list and touch to select or touch to exit and return to the edit velocity field When a measurement was taken and the velocity is changed a new measurement is automatically displayed that reflects the change in velocity 5902 6 54 Figure 2 3 Material velocity table A short touch will reset the minimum measured value to zero Touch for 2 or more seconds to shutdown the unit s 0 ae Changes the backlight illumination Adjust display contrast Store qe A Lock and unlock the keypad Chapter 2 14 QS3 User Manual 2 3 Zero calibration Auto The QS3 uses a zero delay calibration procedure that is activated by simply coupling the transducer over the calibration disk located in front of the unit 125 005 6 35 a Calibr Done Calibration Disc Front Panel Figure 2 4 Zero calibration procedure When this automatic procedure ends the unit is calibrated to measure steel which is the default material velocity used in this calibration method Tip L In order to measure the thickness of the calibration disk 7 without activating the automatic calibration procedure simple touch the edge of the disk until an icon appears as shown in Figure 2 1 3 Inactive calibration disk indicator Page 9 While still touching the edge of the disk couple the transducer to obtain its thickness measurement When the transducer is cou
9. blem persists please send us a detailed report at www demeg com form Support html Sus Hessoge Figure A 2 System error message Error Internal Error Cause Internal Error Solutions Shutdown the unit wait a few seconds and power back on Contact dmq Attempt to store a value over an existing value Cause Improper unit shutdown Example Removing batteries and powering the unit back on to store values in the Data Logger Solution Download Data Logger values to PC or printer and erase memory If a message with a different number where to appear please contact dmq Apendix QS3 User Manual Our website www demeq com Our website is a powerful customer support tool where you will find the latest information as it relates to your QS3 including e Application notes Manuals and brochures New accessories Technical support Our service department is committed to providing prompt and courteous service Should you encounter any issues with your QS3 please send us a detailed description of your problem to www demeq com form_Support html Apendix P N QSD 501 ENG Rev 3 2012 2012 dmq
10. ct View data CAAA AESA Erose ALL Waiting USB Capture Manu fexit Free 1995 Figura 3 7 Connecting to PC 18 Chapter 3 QS3 User Manual With the unit in waiting to connect make sure that the USB or the RS232 cable depending on the type of connecting cable that you are using is properly connected to both the unit and the PC and click on lt Connect gt in DataCenter When a successful connection is established the files in your unit memory will appear in DataCenter To view their contents simply double click on each file For additional information on dmq DataCenter software refer to the manual included in the CD that you received with your QS3 or download the manual at http www demeq com Download html Note 4 Connection to a PC is only posible with a QS3 DL The 7 QS3 B does not connect to a PC 3 5 2 View data View Dota Touch on View Data to view the contents stored in the memory in a grid format Touch KaJ to exit the grid Figure 3 8 View stored data in a grid format The QS3 stores values in groups of 100 measurements This means that every 100 measurements a new lot is created lots are indicated by letters Chapter 3 19 QS3 User Manual 3 5 3 Erase memory Erase The Erase action permanently deletes all files stored in the unit memory and recovers 100 of the memory capacity Before files are deleted a screen will be displayed asking you to confirm or to cancel this actio
11. ctly Technical specifications Additional information Unit maintenance QS3 accessories Error messages Our website www demeq com Technical support 22 22 23 24 24 25 25 26 26 QS3 User Manual Thank you choosing dmq And thank you for purchasing a QS3 ultrasonic wall thickness gauge Company Statement At dmq we develop manufacture and distribute software and quality control instruments offering innovation and solutions that come as a direct result of listening to your needs as a user We apply some of the latest technology available in the industry to build instruments that are robust precise and easy to operate We are convinced that our products would not be complete without permanent technical and after sales support So in addition to a great product we offer Quick answers to your inquiries Unlimited access to technical information as well as application notes e Special offers for registered customers e Firmware and software upgrades at no charge e Attention to your inquiries and suggestions We hope that the QS3 will meet and exceed your application needs QS3 User Manual General information Models included in this manual The information included in this manual applies to all QS3 series ultrasonic wall thickness gauges including models B and DL Registered trademarks dmq is a registered trademark of demeq S R L and its affiliate companies Important notice The information containe
12. d in this manual is intended to educate users on the operation of the QS3 gauges Failure to read and understand this manual can lead to measurement errors Decisions based on measurements and or results that are erroneous can lead to property damage personal injury or even death Demeq S R L assumes no responsibility as a result of the improper use of our instruments Applicable standards e ASTM E797 User training The user must be trained in ultrasonic testing procedures and on how to properly configure the unit for testing All of the following should be taken into consideration e Understand the theory on sound wave propagation Select the instrument as well as the transducer that is best suited for your application e Know the specific requirements for the test you will be conducting This manual provides all of the information needed to configure and operate the QS3 gauge However there are additional factors that can IV QS3 User Manual affect tests done with this instrument Specific information on those factors is outside the scope of this manual When in doubt you should always seek expert advice or refer to specific textbooks on ultrasonic testing Additional information can also be found on the internet and through local government agencies as well as in technical institutes Measuring Principle The QS3 operates with dual crystal transducers that use the pitch catch principal Dual crystal transducers
13. d short touches to activate special functions and features Calibration disk Horizontal scrolling center point lock and unlock keypad on measure screen Vertical scrolling center point adjust LCD contrast 1 1 2 Connectors Figure 1 2 Unit connectors Receiving transducer connector Type Lemo 00 Emitting transducer connector Type Lemo 00 USB mini connector to connect to PC using a USB cable QS3 DL only Chapter 1 QS3 User Manual 1 2 Install or replace batteries The QS3 is powered by 2 two AA batteries that are placed in the battery compartment located in the back of the unit To gain access to the battery compartment slide the cover as shown in figure 1 3 1 and gently push the extraction ribbon upward and slightly towards the right to release the batteries figure 1 3 2 When you install new batteries first insert the positive end of each battery so that it coincides with the positive pole inside the battery compartment as you see in figure 1 4 1 Always leave the extraction ribbon underneath the batteries AA Size 1 5V l dan l JU i hi Extraction ribbon F I AS aziS vy E am L Battery compartment cover Figure 1 3 Removing batteries Chapter 1 3 QS3 User Manual EE AA Size 1 5V l toe AS Lezisvvy Hi am Battery compartment cover Figure 1 4 Replace Insert batteries s Notes 4 K Use new alkaline top brand batteries only
14. ion to compensate for changes caused by temperature in order to maintain optimal viewing conditions 3 6 6 Beep Activation Beep Beep refers to the sounds that the unit makes when keys are touched and when the audible alarm is activated Touch to enable or disable the beep option Chapter 3 25 QS3 User Manual 3 6 7 Hold last value Hold Last When you enable the Hold last option the last measured value will be displayed on the unit screen even when the transducer is not coupled When hold last is disabled and the transducer is not coupled the unit display will read Touch to enable or disable this option 25 003 s 59807 6 54 59007 6 54 Hold Last mode On Hold Last mode Off Figure 3 19 Measuring screens with hold last value enabled or disabled 3 6 8 Unit information Unit Info Touch on Unit Info to view the hardware and software versions in your unit To view different unit information screens touch the EJ EJ keys To return to the main menu touch oF dne NS3 Soft 1 81 8001 VH 801 8019 Serial 18001 28 61 18 KOev 00012 Hoard 001 001 OS 1 01 8001 UDev 88882 lt C 28 61 18 28 61 18 00014 V Figure 3 20 QS3 unit information screens 26 Chapter 3 QS3 User Manual Tips on how to measure correctly Do not measure outside the thickness range specified for the transducer that you are using Use just enough coupling gel to ensure stable measurements Avoid using excessive
15. measuring screen 8 Chapter 1 QS3 User Manual 2 Measuring with the QS3 2 1 Measuring screen The QS3 measuring screen is represented below o w p y Chapter 1 Ii to 25 002 59882 6 54 Figure 2 1 Measuring screen Icon indicating that a value was stored Locked keypad icon indicator Page 7 Inactive calibration disk indicator Page 12 Coupling indicator Measuring unit Battery level indicator Minimum measured value set to zero touching Q Thickness value in the selected unit Material velocity QS3 User Manual 2 2 Keys in the measuring screen Keypad functionality a Touch to exit the measuring screen and enter the main menu Touch to manually store the measurement in the memory ams Touch to activate the Select Edit mode Flashing arrows will appear over the fields of material velocity and measurement Edit Thickness e Touch to select thickness measurement ar Touch to select material z velocit 8 B si s 6 54 Edit Speed Figure 2 2 Measuring screen in select edit mode Always use the ATV keys to edit the values in any given field and touch to save Note AE 5 The measurement field can only be edited if an actual 7 measurement was taken If the measurement is 0 00 this field cannot be edited 10 Chapter 2 QS3 User Manual Touch the o when editing velocity and a screen will lt appear with the most commonly used m
16. n Touch to cancel and return to the previous menu or touch to begin deleting all files Erase ALL Figure 3 9 Erase All confirmation screen When the erase all action has been confirmed the following screens will be displayed Erase ALL Erase ALL saz C 1007 Erasing Done Figure 3 10 Erase All progress screens After this process is completed all of the cells in the grid will be empty 20 Chapter 3 QS3 User Manual 3 5 4 Capture modes Copture Touch on Capture to select the mode in which values will be stored in the Datalogger Figure 3 11 Memory capture modes menu The QS3 has the following capture modes Manual Touch the key to store values Auto When the transducer is coupled measurements are continuously stored 3 5 5 Free memory Free Free memory is followed by a number representing the remaining memory that is available to store data and is represented in number of cells Touch on Free to view the remaining number of free cells and the free memory space as a percentage of the unit total memory Free Henory Free Henory 4995 i Ok Figura 3 12 Remaining memory screens Chapter 3 21 QS3 User Manual 3 6 Unit configuration Conf igure Touch on the Configure option located Key Sense 58 on the main menu to open the general Goin S configuration options menu for the QS3 that Autolff 6 includes measurement related settings such as Contrast 16
17. of the unit may be exposed to water and or vapors the sensitivity should be lowered Chapter 3 23 QS3 User Manual 3 6 3 Adjust gain Goin Touch on Gain to change the gain level signal sensitivity The higher the gain the more sensitive the unit will be making it easier to measure lower thickness values But excessive gain can also cause erroneous measurements The gain is typically adjusted when changing transducers Touch the AIV keys to adjust the gain value and touch to save and exit Touch KaJ to exit without making changes Figure 3 16 Adjust gain level 3 6 4 Set auto off time Autolff The unit will shutdown automatically if no key is touched or no measurement is made when you set the auto off time Touch on AutoOff to set the time before the unit automatically shutdown Nutolff m Touch the ATV keys to set the time and 5 touch to save and exit Hin Touch Eas to exit without making changes Figure 3 17 AutoOff time 24 Chapter 3 QS3 User Manual 3 6 5 Adjust disolay contrast Contrast Use this setting to adjust the screen contrast making it lighter or darker where 1 is the lightest and 32 is the darkest Touch on Contrast and use the AIV keys to change the contrast on your screen Touch to save or touch O to exit without making changes Contrast fy Contrast 16 SSS Figure 3 18 Screen contrast settings Contrast on LCD screens can change with temperature Use the contrast opt
18. pled you no longer need to touch the edge of the disk 12 Chapter 2 QS3 User Manual 2 4 Changing the material velocity 2 4 1 Change to a known velocity If you know the velocity of the material you will be measuring you can manually enter the velocity by doing the following Go to the measuring screen e Touch to enter the Select Edit mode e Touch to select the velocity field e Use the cursors to set the velocity and touch to confirm or touch Fay to cancel Touch the P when editing velocity and a screen will appear with the most commonly used materials and their velocities Use the cursor keys to scroll the list and touch to select or touch to exit and return to the edit velocity field 2 4 2 Change velocity using a known thickness value If you do not know the velocity of the material but you know the material thickness you can set the velocity using the material thickness value by doing the following e Measure the material for which you already know the thickness e Lift the transducer and touch to enter the Select Edit mode Touch to select the thickness measurement field Chapter 2 13 QS3 User Manual Use the cursors to set the thickness value and touch to confirm or touch Eau to cancel When editing the thickness value observe that the velocity will change accordingly When changing the material velocity using a known 4 thickness value the unit must have already been calib
19. rated for the transducer being used Page 12 14 Chapter 2 QS3 User Manual 3 Menu system and editing 3 1 Instructions on using the menu system The instructions explained in this chapter apply to all of the menus in the unit To scroll QS3 menu options use the AIV cursor keys When you reach the end of the menu and move to the next menu option it becomes circular as shown below E 2 nglish ae English s Spanish pa Spanish z Portuguese 10 25 Figure 3 1 Example of how a circular menu works To select a menu option touch and to exit and return to the previous menu touch ot To go to the measuring screen touch from the main menu oy Alorns a mi Henory 59007 6 54 Ean Configure gt Figure 3 2 The Home key from the measuring screen Chapter 3 15 QS3 User Manual 3 2 Main menu The main menu is the first list of options that appears when you exit the measure screen Alarms d and it includes the most important settings Henory E Configure gt Touch from the measuring screen to access this menu Figure 3 3 Main menu All available main menu options are explained herein 3 3 Change measuring unit Unit Touch on Unit in the main menu to open the list of available units Use the AIV keys to scroll the menu Touch to select the unit and touch Eag to save and exit this menu Figure 3 4 Units menu 16 Chapter 3 QS3 User Manual 3 4 Alarm settings Alors The
20. rements will be unreliable Each and every time a transducer is changed it must be calibrated to the unit 2 Material sound velocity calibration Because the sound velocities in materials will often vary significantly from published values best results are obtained when the instrument is calibrated on a reference test block made from the same material as that of the actual test piece The block should be flat of a smooth finish and be as thick as the maximum thickness of the test piece Careful consideration by the user must be made when evaluating the accuracy of a thickness value because considerable changes in the sound velocity of a material may have occurred as a result of a treatment So for example a test piece made of steel that has been thermally treated will look the same as a regular test piece made of VI QS3 User Manual untreated steel but the sound velocities vary significantly Instruments should be calibrated before and after testing to minimize errors 3 Transducer selection Transducers must be in good condition and show no visible signs of excessive wear or defects on their surface Badly worn transducers can provide erroneous measurements The thickness of the material being tested must be within the specified thickness range of the transducer and the temperature of the material must also be within the specified temperature range of the transducer 4 Use of couplants Calibration as well as actual testing sho
21. ts must be done in compliance with all applicable regulations About the Software Because of its complexity level software is never really completely error free For this reason in software controlled instruments always make sure that the operations required for your application are in correct working order Warranty Demeq S R L provides a limited warranty for a period of 2 two years on electronic units and for 6 six months on transducers from the date of purchase and may be extended for up to 5 years Every instrument undergoes thorough testing during manufacturing as well as before shipping In the event warranty service where to become necessary dmq and or your local distributor or representative will make a reasonable effort to replace your defective unit with another new or used unit while your instrument undergoes warranty repair VIII QS3 User Manual 1 First steps 1 1 Know the QS3 1 1 1 Front panel Figure 1 1 Front of the unit _ Graphic LCD display with LED backlight illumination 2 Move Left key 3 Move Up key 4 Menu key Enter and exit measure screen Exit and return to menus Home 5 Enter key Edit values on the measure screen Edit Move Down key Quick access to memory menu screen options Mem Chapter 1 al QS3 User Manual 10 11 Change backlight illumination key On Off Auto The Q key Power On and Shutdown touch and hold for 2 seconds Make quick an
22. uld be performed under similar coupling conditions Couplant must be applied in an even and consistent manner to minimize variations in couplant layers that may result in testing errors The amount of couplant should be kept to a minimum and consistent pressure should be applied on the transducer when measuring 5 Conditions under which Doubling may occur Doubling refers to a thickness measurement that displays a reading that is twice or even three times the real test piece thickness Doubling often may happen when trying to measure below and above the specified range for the transducer and when using worn transducers When in doubt the test piece thickness must be measured using other methods and or instruments and the unit must then be calibrated using reference test blocks of known thickness values that are made of the same material as the actual test piece This is very important when measuring unknown test pieces for the first time 6 How temperature may affect calibration When possible calibrate your instrument on site using a test block that is at the same temperature as the test piece in order to minimize errors VII QS3 User Manual Important Safety Information QS3 series thickness gauges are for industrial use only and cannot be used in medical applications The QS3 operates on two AA size batteries We strongly recommend that you use only top brand name alkaline batteries Disposal of your QS3 gauge and its componen
23. use two piezoelectric crystals whereby one crystal is excited with short electrical pulses from the unit sending short acoustic waves into the test piece The second crystal then receives the acoustic waves reflected at the end of the test piece The frequency of the acoustic waves changes between 2 and 10 MHz depending on the probe being used Emision Pulse 1st Echo Receiver Delay 2 Thickness e Figure 1 Transducer acoustic wave representations QS3 User Manual Testing Limitations In ultrasonic testing information is obtained from measuring sound waves Users must be very careful when making assumptions in regards to the entire test piece condition when there are areas that have not been inspected In large and massive test pieces it would be practically impossible to test the entire piece and therefore conclusions for the whole piece based solely on the areas that have actually been inspected should only be done by experienced operators Only trained users should evaluate test pieces that could present erosion and or corrosion Critical Operating Procedures In order to minimize test result errors the following must be observed l Zero calibration Before taking actual measurements the unit and transducer have to be calibrated Calibration of the transducer is also known as zero calibration or delay calibration Page 72 If the unit and transducer are not calibrated or calibrated incorrectly the resulting measu
Download Pdf Manuals
Related Search