Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Demeq Manuals
  4. Test Equipment
  5. QH5-D
  6. User manual

Demeq QH5-D User Manual

Portable hardness tester
Hide thumbs

Advertisement

Quick Links

Download this manual

Advertisement

loading
Need help?

Need help?

Do you have a question about the QH5-D and is the answer not in the manual?

Questions and answers

Summary of Contents for Demeq QH5-D

  • Page 2 P/N: QHD 501 – ENG – Rev 3 – 2012...
  • Page 3 Chapter 1 First steps Know the QH5 1.1.1 Front panel 1.1.2 Connectors Install or replace batteries Connecting the impact device Using the impact device 1.4.1 Loading the impact body 1.4.2 Release and measure The “Q” key Display illumination and contrast 1.6.1 Display backlight illumination 1.6.2...
  • Page 4 3.2.2 Alarm settings 3.2.3 Set histogram range 3.2.4 Select language 3.2.5 Unit information General configuration options 3.3.1 Set time and date 3.3.2 Set time and date format 3.3.3 Set keypad sensitivity 3.3.4 Set auto-off time 3.3.5 Adjust display contrast 3.3.6 Beep activation 3.3.7 Introduction screen...
  • Page 5 Quick memory menu (Mem key) Connecting to PC with DataCenter Datalogger configuration 4.8.1 Configure communications 4.8.2 Capture modes 4.8.3 Advanced configuration Tips on how to measure correctly Technical specifications Additional information Unit maintenance QH5 accessories Error messages Our website: www.demeq.com Technical Support...
  • Page 6 And thank you for purchasing a QH5 rebound hardness tester. 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 7 The information included in this manual applies to all QH5 series portable hardness testers including models D, G and M. 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 QH5 impact hardness testers.
  • Page 8 This manual provides all of the information needed to configure and operate the QH5 hardness tester. However there are additional factors that can 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 portable hardness testing.
  • Page 9 The measured Leeb value (HL) represents a direct hardness value that is converted to other hardness units such as Brinell, Vickers, Rockwell and Shore. Both the HL value and another selected hardness unit are displayed on the unit screen simultaneously. There are a number of available impact devices and each one of them is different and ideal for specific applications.
  • Page 10 Impact device type D This is the standard device in impact hardness testing because it measures in all of the units and materials covered with the QH5. The type D impact device covers the widest range of applications. Impact device type DC This device type, just like impact device type D, can also measure in all units and materials but features a much shorter body (50mm) making ideal for measurements in hard to reach places that cannot be...
  • Page 11 Impact device type E Impact device E uses a synthetic diamond tip (all other impact device types use tungsten carbide tips). The diamond tip allows it to measure harder test pieces such as those made out of template steel. This device type measures steel only and extends the Vickers range to 1211HV (device type D measures up to 940HV).
  • Page 12 Impact body Energy (N*mm) Mass (g) Surface test piece requirements Rugosity ISO Rugos. RT (µm) Rugos. RA (µm) Minimum test piece weight (Kg) Stand alone With solid support Coupled with 0.02 paste Minimum test piece thickness (mm) Coupled Surface thickness —...
  • Page 13 This section provides an overview of basic impact device components. Figure 3: Impact device components Figure 3 is a representation of the most important parts that make up an impact device and the procedure used to remove the impact device tip.
  • Page 14 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.
  • Page 15 Figure 1.1: Front of the unit Graphic LCD display with LED backlight illumination Move Left key / View partial statistics (Stat) Move Up key / Manually store a value (Store) Move Right key / Switch to graphical measure mode screen (Graph) Menu key / Enter and exit measure screen / Exit and return to menus (Home)
  • Page 16 Move Down key / Quick access to memory menu screen options (Mem) Change backlight illumination key (On, Off, Auto) Enter key / Edit values on the measure screen (Edit) key: Power On and Shutdown (touch and hold for 2 seconds) / Make quick and short touches to activate special features 10.
  • Page 17 The QH5 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).
  • Page 18 Figure 1.4: Replace / Insert batteries Notes Always use new alkaline top brand batteries for extended battery life. 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 19 Important Do not remove batteries while the unit is powered as this affect Datalogger (See Appendix: “Additional information, Error Messages”) The QH5 uses a type Lemo 0B 3-pin connector located on top of the unit. All dmq impact devices are provided with Cal-Tag technology allowing you to easily switch or replace impact devices with no need to calibrate the unit.
  • Page 20 The procedure explained herein is applicable to all impact device types except for impact device type DC as it does not use a spring loading mechanism. Place the impact device over the surface you want to measure and load by gently pushing the moving body of the impact device in the same direction as the test piece surface.
  • Page 21 have 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 each chapter of this manual.
  • Page 22 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 23 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 24 The QH5 can display measurements in 3 distinct numerical measuring modes or screens each one showing specific information. To switch numerical measure screens touch the key. Figure 2.1: Measure screen mode-1 Leeb hardness value where L is Leeb and x is the impact device type Datalogger mode indicator: X: Off - M: Manual - A: Auto + (plus) or –...
  • Page 25 Impact device angle indicator (Page 16) 10. User selected hardness unit (Page 19) 11. Average hardness value in the hardness unit selected by the user 12. Position of the last stored value (Column, Row) 13. Name of the open file where values are being stored (Page43) User selected test piece material (Page...
  • Page 26 17. Minimum hardness value within the group 18. Average deviation within the group Number of (N) values indicator for real time statistics (Page 20. Average within the group 21. Maximum hardness value within the group 22. Range within the group 23.
  • Page 27 Figure 2.4: Measure screen in mode-2 select / edit mode  To select angle touch (the angle can be changed even while measurements are being made).  To select hardness unit touch  Touch to select material. Always use the keys to edit the values in any given field and touch to save.
  • Page 28 : Short touches allow you to switch between the three measure screen modes. Touch for 2 or more seconds to shutdown the unit. : Changes the backlight illumination. : Enters the direct access function established by the user. : Set display contrast. : Lock and unlock keypad.
  • Page 29 Leeb hardness value where L is Leeb and x is the impact device type Hardness value in the hardness unit selected by the user Battery level indicator Impact device angle indicator High alarm indicator (Page 23) Graphic of average value within group 10.
  • Page 30 Figure 2.6: Graphic measure screen in select / edit mode Use the to edit and to save the change in the hardness unit touch In rebound hardness testers that use a separate impact device, the angle in which the impact device is used, can affect the hardness value. In order to avoid erroneous measurements set the electronic unit to the same angle in which the impact device will be used.
  • Page 31 The QH5 offers you three ways of changing the impact device angle:  From the measuring screen touch to enter the select / edit mode and touch to select angle. Edit using and touch to save.  Touching the key as long it was set to Angle in the direct access options that can be set for this key (Page35).
  • Page 32 The QH5 offers three ways to change hardness unit:  On the numerical measure screen touch to enter the select / edit mode and touch to select unit. Edit using the cursor keys and touch to save.  Touching the as long it was set to Unit in the direct access options that can be set for this key (Page 35)
  • Page 33 The instructions explained in this chapter apply to all of the menus in the unit. To scroll QH5 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 herein.
  • Page 34 The text editor is used to input, modify and delete; letters, numbers and symbols. Figure 3.3: Alphanumeric editor screens Selected key Cursor Text to be edited Virtual keyboard Use the cursor keys on the unit to scroll the virtual keyboard until you find the character that you want to use and touch to select.

  • Page 35: Front Panel

    Move cursor to the right Delete character on which cursor is on Enter and exit Figure 3.5: Quick access keys for the virtual keyboard editor Touch the key to open the direct access keyboard to the most commonly used virtual keyboard keys. Each virtual key corresponds to a key on the front panel of the unit as follows: : Move the cursor to the left : Erase the character on which the cursor sits...
  • Page 36 The main menu is the first list of options you will see when you exit the measure screen and it includes the most important settings. Touch from the measuring screen to access this menu. Figure 3.6: Main menu Touch on Unit in the main menu to open the list of available hardness units.
  • Page 37 Notes The units in (Figure 3.7) are for an impact device type D. Remember that hardness units depend on the impact device that is connected to the unit (Page 56). Hardness units HU1 and HU2 are user units (Page 37). The QH5 has high and low alarm conditions that alert the operator when the measurement is greater than the value set for the high alarm and or when the measurement falls below the value set for the low...

  • Page 38: Display Backlight Illumination

    Light: Visible alarm that activates the display backlight illumination causing it to flash. Here you can set high and low values (hardness range) that will be represented on the vertical axis of the graphical measure screen or histogram. Figure 3.9: Set histogram range values Touch on Histo Range to open the histogram menu.
  • Page 39 Select Unit Info to view information including owner data as well as the software version that your unit is running. To switch between unit information screens touch the keys. To return to the main menu touch Note The information required to obtain model upgrade licenses is included in this option.
  • Page 40 Choose Set Clock to open the time editor and use the cursor keys to set the time. Touch to save and to enter the date editor screen. After you change the date touch to save and exit. Figure 3.12: Time and date edit screens Choose Clock Format to open the menu that allows you to set the time format (12Hs or 24Hs) and the date format (D/M/Y –...
  • Page 41 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. Figure 3.14: Key sensitivity setting and confirmation screens To confirm the change in sensitivity touch .
  • Page 42 The unit will shutdown automatically if no key is touched or no measurement is made after a time set by you. Touch on AutoOff to set the time before the unit automatically shuts down. Touch the keys to set the time and touch to save and exit.
  • Page 43 Tips Contrast on LCD screens can change with temperature. Use the contrast option to compensate for changes caused by temperature to maintain optimal viewing conditions. Beep refers to the sounds that the unit makes when keys are touched and when the audible alarm is active. Touch to enable or disable the beep option.
  • Page 44 The user information that can be changed includes the following: Name: Set or change the owner name. Phone: Set or change the telephone number. Name@: Set or change the e-mail (before the @). @Domain: Set or change the domain for the e-mail (after the @). Edit Pass: Allows you to change the password needed to access this menu.
  • Page 45 Certain configuration options on your QH5 unit can be locked in order to avoid unwanted changes. Use of the locking options allow a supervisor to optimize unit configuration settings required for a specific test and then pass the unit on to an operator for him or her to conduct the actual measurements knowing that the unit has been properly configured and that the settings cannot be changed.
  • Page 46 QH5 models can be changed with software licenses that you can purchase from dmq. If you want to purchase an upgrade license we will need to know the following information:  Unit model  Unit serial number  The type of license that you would like to purchase Touch on Licenses to view all licenses available for your unit (checkmarks indicate...
  • Page 47 Figure 3.21: Response messages after a license is entered If the license number that you entered is correct the unit will show an updated license screen where the newly purchased license appears followed by a checkmark. Choose Set Default to return to the original factory default general configuration options.

  • Page 48: Set Impact Device Angle

    Select Hardness from the main menu to display measuring configuration options. Correctly setting these options is critical in obtaining reliable hardness measurements. Figure 3.23: Measuring configuration options menu Touch on Angle to select the angle in which the impact device will be used.
  • Page 49 Touch on Material to select the material that corresponds to the test piece that you want to measure. The options available in this menu will depend on the impact device connected to the unit (Page 56). Use the keys to scroll all menu options and touch to select.
  • Page 50 Store: To manually store measurements using this key. Go to Grid: Touch to go to the grid in the open file. In order to obtain reliable measurements with your QH5, we recommend that you take at least 3 (three) measurements (within 3- 4mm from one another) and use the average of all 3 values as your final hardness measurement.
  • Page 51 Touch on Measure to open the measure modes options menu. Figure 3.27: Measure mode options menu and set nominal value The modes in which measurements are represented are: Absolute: The unit displays the real measured value. Differential: The value displayed is a result of the value obtained from calculating: Differential = Real value –...
  • Page 52 In order to create a user unit you must select a material (the closest one to a material in the predetermined list) that you will be measuring, and you must also choose a hardness unit. After selecting the material and hardness unit touch on Custom Units to view available the User Unit 1 and User Unit 2 menu.
  • Page 53 symbol will appear indicating that the value on screen is the average of the N measurements. Right below the average value the number that appears after can be changed to match the known hardness value of the test piece sample. When you touch the new reference point will be saved and the menu will change giving you two new options:...
  • Page 54 To enter the second reference point, follow the same procedure that you used to enter the first one. User units are called HU1 and HU2. In the hardness unit selection menu, newly created user units will be followed by the hardness unit that they where based on.
  • Page 55 Important Because user units are created to measure uncommon materials and alloys they are approximate measurements that can present a greater degree of error when compared to the materials in the predetermined unit list. To know how precise a user unit really is you should work with several test piece samples of known hardness values that when measured should give you the approximate same error.
  • Page 56 device type must be selected manually. When you do a manual selection make sure that the selected impact device corresponds to the impact device that is connected to the unit. The tip of the impact device is subject to wear that comes from regular use.
  • Page 57 In order to optimize the use of the Datalogger in your QH5 it is important that you understand how data is organized. In the QH5 data is stored in 8 individual files with alphanumeric names. Each file contains a grid with columns and rows. And each grid contains columns (identified with consecutive letters;...
  • Page 58 Select Memory from the main menu to view all menu options for the Datalogger. This chapter explains how to create, organize, and view files. Figure 4.2: Memory menu Touch on Files and use the cursor keys to navigate the list of files in the unit.
  • Page 59 Remember that only one file can be open at any given time so whenever a new file is created, if a file was already open, the file that was open will be closed. Once a file has been closed, it cannot be reopened and new values can no longer be stored.
  • Page 60 Touch on View Data to view the contents of the file. Touch to exit the file. Figure 4.6: File view in grid format To move inside the grid use the cursor keys and touch to jump to the last column containing data. Touch on a value to open a histogram that includes that same value as well as the...
  • Page 61 Touch to open the quick access menu that allows you to go directly to a position inside the grid. Select the Row, Column, and Cell using the keys. Figure 4.8: Quick access menu options in a grid Row: Enter a row number using the cursor keys so that when you touch the grid will position itself directly on that row.
  • Page 62 Touch in the histogram to open the quick access menu that allows you to obtain statistical information on the group of values being displayed. Figure 4.9: Quick access menu options in a histogram Error: Displays the number of errors and error percentage values in the batch based on the high and low alarm settings.

  • Page 63: Text Editor

    Touch on Rename to open the text editor that allows you to change the file name. Touch on Size to view the number of stored values within a single file (and the size of the file as a percentage of total unit memory).
  • Page 64 Touch to cancel and return to the previous menu or touch to begin deleting all files. Figure 4.11: Erase all confirmation screen When the erase all action has been confirmed the following screens will be displayed: Figure 4.12: Erase all progress screen Touch on the measuring screen to open the quick memory menu.
  • Page 65 Options in the first quick access memory screen: Label: Allows you to tag a value with a number from 0 to 65535 so that it can be easily identified in the grid that you open in DataCenter. Tags are not seen in the grids displayed in the unit. Close: Close the current file and opens a new one.
  • Page 66 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 QS5 or download the manual at http://www.demeq.com/Download.html memory menu touch...
  • Page 67 Touch on Mode to select the type of connection. USB: Select USB to connect to a PC using a USB cable (included). You must already have DataCenter installed in your PC. RS232: Select RS232 to connect to a PC or a printer using an RS232 cable (optional).
  • Page 68 Touch on Capture to select the mode in which values will be stored in the Datalogger. Figure 4.17: Memory capture modes menu The QH5 has two modes in which to store values Manual: Touch the key to store values. Auto: Every time a measurement is made, the value is automatically stored in the Datalogger.
  • Page 69 When you enable history the Datalogger will register the unit settings for each measurement that is stored. Information such as gain, trigger, velocity and calibration settings are stored along with the thickness value. This data can only be viewed in DataCenter. When history is enabled the unit memory capacity decreases as more data is stored.
  • Page 70 When selecting the QH5 model that is right for you, you must first choose an impact device type. Select the impact device based on the materials, hardness units, and hardness ranges that you will be measuring by referring to the table below: Impact device type Unit D/DC...
  • Page 71 Impact device type Unit D/DC D+15 Cast aluminum 30~ 165 — — — — — Brass 40 ~173 — — — — — 13 ~95 — — — — — Bronze 60 ~290 — — — — — Wrought copper 45 ~315 —...
  • Page 72 Do not measure test pieces that exceed the maximum hardness limits of your impact device: Impact device type Maximum hardness D – DC – DL – E 890 HL (68 HRC) 960 HL (70 HRC) 750 HL (645 HB) To obtain precise measurements the following minimum mass and thickness requirements must be met: Impact device type D/DC...
  • Page 73 When measuring on curved surfaces the curvature radius should not go above 0.3mm in both concave and convex angles. Always use supporting rings on non-flat surfaces. Figure A.1: Measuring on curved surfaces Control your impact device on a reference test block at least every 500 impacts to check its condition.
  • Page 74 Measuring Principle Impact Leeb Rebound QH5 D Impact Devices D, DC QH5 G Impact Device QH5 M Impact Devices D, DC, DL, D+15, E, G, C Materials Steel and cast steel, Alloy tool steel, Stainless steel, Grey cast iron, Spheroid iron, Cast aluminum, Brass, Bronze, Wrought Copper.
  • Page 75 Connect to PC USB or RS232 Display Graphical 128 x 64 pixels with digital contrast and backlight. 24mm digits. Keypad Touch-Sense keypad with no mechanical parts and sensitivity adjustment. Battery Life 150 Hr with 2 AA type batteries. Working Temperature -10°C to +50°C Enclosure Size ABS 78x117x24 mm with rubber sides.
  • Page 76 To become a part of the dmq family of users and to receive newsletters and promotional offers available only to dmq customers, register your unit at www.demeq.com/form_Register.html The QH5 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: ...
  • Page 77 QH5 D to QH5 M upgrade license QHL 203 QH5 G to QH5 M upgrade license QAC 002 RS232 cable to connect to a PC QAC 003 RS232 cable to connect to a printer For additional information and accessories for your QH5 visit www.demeq.com/Accessories-QH.html Appendix...
  • Page 78 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 problem persists please send us a detailed report at www.demeq.com/form_Support.html Figure A.2: System error message Error 1 Internal Error...

  • Page 79: Model Upgrade Licenses

    To download firmware and software updates to your QH5 you must have dmq DataCenter installed on your PC.. To download the latest updates for your unit refer to www.demeq.com/Download.html Our service department is committed to providing prompt and courteous service. Should you encounter any trouble with your QH5 please send us a detailed description of your problem to www.demeq.com/form_Support.html...

This manual is also suitable for:

Qh5-gQh5-m