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Summary of Contents for DMQ QSV-B
- Page 2 P/N: QSD 101 – ENG – Rev 2 – 2012...
- Page 3 Chapter 1 First Steps Know the QSV 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 Chapter 2 Measuring with the QSV Measuring screen Keys in the measuring mode...
- Page 4 3.5.4 Capture modes 3.5.5 Available memory Caliper selection 3.6.1 Connecting the caliper General configuration options 3.7.1 Select language 3.7.2 Set keypad sensitivity 3.7.3 Adjust gain 3.7.4 Adjust pulser excitation voltage 3.7.5 Set auto-off time 3.7.6 Adjust display contrast 3.7.7 Beep activation 3.7.8 Hold last value 3.7.9...
- Page 5 And thank you for purchasing a QSV ultrasonic velocity gauge. 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.
- Page 6 The information included in this manual applies to the QSV ultrasonic velocity gauge only. dmq is a registered trademark of demeq S.R.L and its affiliate companies. The information contained in this manual is intended to educate users on the operation of the QSV velocity gauge. Failure to read and understand this manual can lead to measurement errors.
- Page 7 should always seek expert advice or refer to specific textbooks on measuring the sound velocity of materials using an ultrasonic velocity gauge. Additional information can also be found on the internet and through local government agencies as well as in technical institutes. The QSV operates with dual crystal transducers that use the “pitch- catch”...
- Page 8 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.
- Page 9 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.
- Page 10 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.
- Page 11 Figure 1.1: Front of the unit Graphic LCD display with LED backlight illumination Move Left key Move Up key Menu key / Enter and exit measure screen / Exit and return to menus (Home) Enter key / Edit values on the measure screen (Edit) Move Down key / / Manually store a value (Store) Chapter 1...
- Page 12 Change backlight illumination key (On, Off, Auto) key: Power On and Shutdown (touch and hold for 2 seconds) / Make quick and short touches to activate special functions and features Calibration block 10. Horizontal scrolling center point (lock and unlock keypad on measure screen) 11.
- Page 13 The QSV is powered by 2 (two) AA batteries that are placed in the battery compartment located in the back of the unit. To 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).
- Page 14 Figure 1.4: Replace / Insert batteries Notes Use new alkaline top brand batteries only. 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. Chapter 1...
- Page 15 Important Do not remove batteries while the unit is powered as this may affect the Data logger (See Appendix: “Additional information, Error Messages”) The QSV 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 QSV.
- Page 16 has three functions: When the unit is off, touch for 2 seconds to power on the unit. When the unit is on, touch for 2 seconds to shutdown the unit. With the unit on, making short touches to the will activate special functions described in later chapters of this manual.
- Page 17 The display contrast on all dmq units is digital. Touch the white dot located in the center of the vertical scrolling bar between the keys and 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.
- Page 18 Sliding the finger to the left will unlock the keypad. Figure 1.9: Unlocking the keypad Important The keypad can only be locked and unlocked in the measuring screens. Chapter 1...
- Page 19 Figure 2.1: Measuring screen Icon indicating that a value was stored Locked keypad icon indicator (Page 8) Inactive calibration disk indicator (Page 16) Coupling level indicator Unit Battery level Indicator Minimum measured value Velocity measured in the unit that you selected Thickness of the test piece being measured Chapter 2...
- Page 20 Keys in the measuring screen have the following functionality: : Touch to exit the measure screen and enter the main menu. : Touch to manually store the measurement in the memory. : Touch to activate the Select / Edit mode. Two flashing arrows will appear over the fields of velocity and thickness.
- Page 21 Tips Touch the when editing velocity and a screen will appear with the most commonly used materials and their velocities as seen in (Figure 2.3). Figure 2.3: Materials velocity list table Use the keys to scroll the list and touch to select or touch to exit and return to the edit velocity field.
- Page 22 The QSV uses a zero (delay) calibration procedure that is activated by simply coupling the transducer over the calibration disk located in front of the unit. 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.
- Page 23 With a QSV-DLC you can connect a caliper to the unit that is used to measure the test piece thickness. In order to measure sound velocity you must always know the part thickness. The measuring procedure is explained below: Measure the test piece thickness with the caliper connected to the QSV.
- Page 24 The thickness that you saved to the unit will only be changed when a new thickness is measured with the caliper and saved. 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: ...
- Page 25 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. Touch to enter the Select / Edit mode. Touch to edit the velocity field. ...
- Page 26 The instructions explained in this chapter apply to all of the menus in the unit. To scroll QSV menu options use the cursor keys. When you reach the end of the menu and move to the next menu option it becomes circular as shown below.
- Page 27 The main menu is the first list of options that appears when you exit the measure screen and it includes the most important settings. Touch from the measuring screen to access this menu. Figure 3.3: Main menu Each main menu option is explained in the following items. Touch on Unit in the main menu to open the list of available units.
- Page 28 QSV can store up to 5000 values that can be viewed on the unit display and or transferred to a PC via USB using dmq DataCenter. Figure 3.6: Memory menu options on Connect to enter the “waiting to connect” mode.
- Page 29 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 QSV or download the manual at http://www.demeq.com/Download.html...
- Page 30 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 action. Touch to cancel and return to the previous menu or touch to begin deleting all files.
- Page 31 Touch on Capture to select the mode in which values will be stored in the Data logger. Figure 3.11: Memory capture modes menu The QSV has the following capture modes: Manual: Touch the key to store values. Auto: When the transducer is coupled measurements are continuously stored.
- Page 32 This menu gives you two options for use of a caliper connected to the QSV. Enable Activate by touching the key to use the caliper and manually save thickness measurements from the caliper to the QSV. Figure 3.13: Caliper options menu In Auto Thickness mode the measurements that you take with the caliper are automatically saved to the unit until the transducer is coupled.
- Page 33 The cable has two LEDS indicating the connection has been established. The QSV will read values obtained with the caliper when the same measuring unit (metric / inch) is set on both the unit and the caliper. Touch on the Configure option located on the main menu to open the general configuration options menu for the QSV that includes measurement related...
- Page 34 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. on Key Sens. and use the Touch keys to change the keypad sensitivity. Touch to save and the keypad will already be working with the new sensitivity level.
- Page 35 on Gain to change the gain level (signal sensitivity). The Touch 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 keys to adjust the gain value and touch...
- Page 36 When measuring small or thin materials high tensions produce saturated echoes that can affect measurement results. Avoid high tensions especially in small diameter transducers as this could damage the transducer. For the standard 5MHz transducer the tension should not exceed 150V. Large diameter transducers can be set to higher tensions.
- Page 37 Touch to save or touch to exit without making changes. Figure 3.21: Screen contrast settings Tips Contrast on LCD screens can change with temperature. Use the contrast option to compensate for changes caused by temperature in order to maintain optimal viewing conditions.
- Page 38 Figure 3.22: Measuring screen with hold last enabled or disabled QSV models can be changed with the purchase of model upgrade licenses available from dmq. In order to purchase a license you must provide all of the following information: ...
- Page 39 Use the cursor keys to enter the license number and touch to save. Figure 3.24: Enter new license number screen After entering your new license number the unit will respond with one of the following messages: Figure 3.25: Response messages after a license is entered If the license number that you entered is correct the unit will show an updated license screen that will include your newly activated license (now followed by a checkmark).
- Page 40 on Unit Info to view the hardware and software versions Touch in your unit. To view different unit information screens touch the keys. To return to the main menu touch Figure 3.26: QSV unit information screens Chapter 3...
- Page 41 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 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.
- Page 42 Measuring principal Pulse-Echo Measuring range 100 m/s a 19999 m/s Transducer frequency 2 to 10 MHz Measuring frequency 4 Hz Pulser tension Adjustable 20 V to 210 V V-Path Automatic correction. Units Millimeters and Inches. Resolution 1 m/S from 100 to 19999 m/s 0,1 in/ms from 4,0 to 787,0 in/ms Material thickness 1 to 500 mm...
- Page 43 The QSV 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. ...
- Page 44 No. Description QSM 300 Small high impact carrying case QSC 003 InSize caliper interface cable QSC 004 Mitutoyo caliper interface cable QSS 201 2Mhz transducer – 15 mm diameter QSS 501 5Mhz standard transducer – 10 mm diameter QSS 701 7Mhz transducer –...
- Page 45 Figure A.2: System error message Error 1 Internal Error Cause Internal Error Solutions Shutdown the unit, wait a few seconds, and power back on. Contact dmq. Error 2 Attempt to store a value over an existing value. Cause Improper unit shutdown (Example:...
- Page 46 Our website is a powerful customer support tool where you will find the latest information as it relates to your QSV including: Application notes Manuals and brochures New accessories Our service department is committed to providing prompt and courteous service.
- Page 47 P/N QSD-101-ENG-Rev 2-2012 ©2012 dmq...
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