Demeq QH5-D User Manual Download Page 1

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Summary of Contents for QH5-D

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Page 2: ...P N QHD 501 ENG Rev 3 2012 ...

Page 3: ...t 8 1 7 Locking and unlocking the keypad 8 Chapter 2 Measuring with the QH5 2 1 Numerical measure screen Normal 10 2 1 1 Screen mode 1 Datalogger 10 2 1 2 Screen mode 2 Material 11 2 1 3 Screen mode 3 Statistics 11 2 2 Keys in numerical measure modes 12 2 3 Graphic measure screen Histogram 14 2 4 Keys in the graphic measure screen mode 15 2 5 Set impact device angle 16 2 6 Select material and hard...

Page 4: ...on 29 3 3 7 Introduction screen 29 3 3 8 Owner information 29 3 3 9 Lock configuration options 31 3 3 10 Model upgrade licenses 32 3 3 11 Return to factory default settings 33 3 4 Measuring configuration options Hardness 34 3 4 1 Set impact device angle 34 3 4 2 Select material 35 3 4 3 The Plus key 35 3 4 4 Set group N number 36 3 4 5 Select measure mode 37 3 4 6 Create custom or user units 37 3 ...

Page 5: ...ename a file 49 4 4 4 View file size 49 4 5 Actions over all files 49 4 5 1 Send all files 49 4 5 2 Erase all files 49 4 6 Quick memory menu Mem key 50 4 7 Connecting to PC with DataCenter 51 4 8 Datalogger configuration 52 4 8 1 Configure communications 52 4 8 2 Capture modes 54 4 8 3 Advanced configuration 54 Tips on how to measure correctly Technical specifications Additional information Unit m...

Page 6: ... 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 Special offers for registered customers Firmware and software upgrades at no ch...

Page 7: ...asurement 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 ASTM A956 Correct use of an impact hardness tester requires that you take all of the following into consideration Select the instrument as well as the impact device that ...

Page 8: ...formation can also be found on the internet and through local government agencies as well as in technical institutes All QH5 units operate on the Leeb impact rebound method where the ratio between the impact and rebound velocities of the impact body that is released on the test piece are measured to establish a Leeb hardness value The step by step process is represented in figure 1 as follows 1 th...

Page 9: ...ltaneously There are a number of available impact devices and each one of them is different and ideal for specific applications In this section general information measuring ranges and recommended applications are briefly explained for each impact device type In figure 2 a representation of the physical aspect of each one of the impact device types available for the QH5 is shown Figure 2 Represent...

Page 10: ... tip on impact device type DL allows access to very narrow areas that cannot be measured with any other impact device This device measures steel only Impact device type G This impact device type includes a large hardness tip that is 5mm in diameter and it also releases the highest impact energy at 90 N mm allowing its use over rough surfaces such as those in founded and forged pieces and in grey c...

Page 11: ...tends the Vickers range to 1211HV device type D measures up to 940HV The table below shows detailed technical information on each impact device type Parameter Unit Impact device type D DC D 15 DL C G E General characteristics Length mm 147 86 162 202 141 254 155 Diameter mm 20 20 20 20 20 20 Weight g 75 50 80 100 75 250 80 Max Hardness HV 940 940 950 1000 650 1200 Impact device tip Diameter mm 3 3...

Page 12: ...lone 5 5 5 1 5 15 5 With solid support 2 2 2 0 5 5 2 Coupled with paste 0 1 0 1 0 1 0 02 0 5 0 1 Minimum test piece thickness mm Coupled 3 3 3 1 10 3 Surface thickness 0 8 0 8 0 8 0 2 0 8 Test piece impact indentation On parts up to 300HV Diameter mm 0 54 0 38 1 03 0 54 Depth µm 24 12 53 24 On parts up to 600HV Diameter mm 0 45 0 32 0 90 0 45 Depth µm 17 8 41 17 On parts up to 900HV Diameter mm 0 ...

Page 13: ...easurements that you make the impact tip located on the impact device body must be replaced In order to do this turn the support ring clockwise see figure 3 1 until the ring is released and the impact body falls off figure 3 2 Make sure you catch the impact body or that you work over a soft surface where the impact body can fall on without being damaged Remove and replace the impact tip making sur...

Page 14: ...led instruments always make sure that the operations required for your application are in correct working order 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 e...

Page 15: ...splay with LED backlight illumination 2 Move Left key View partial statistics Stat 3 Move Up key Manually store a value Store 4 Move Right key Switch to graphical measure mode screen Graph 5 Menu key Enter and exit measure screen Exit and return to menus Home ...

Page 16: ...old for 2 seconds Make quick and short touches to activate special features 10 The key Direct measure screen access from any menu screens User selectable functions 11 Horizontal scrolling center point lock and unlock keypad on measure screen 12 Vertical scrolling center point adjust LCD contrast Figure 1 2 Unit connectors 1 Impact device connector type Lemo 0B 2 USB mini connector to connect to PC...

Page 17: ...n 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 Figure 1 3 Removing batteries ...

Page 18: ...teries 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 ...

Page 19: ...ices with no need to calibrate the unit Universal non brand impact devices can also be used as long as they have the same connector but dmq does not guarantee their performance To connect the impact device simply align the red dot on the male connector with the red dot on the female connector located on the unit and press gently until connected see figure 1 5 To release the impact device hold the ...

Page 20: ...ce is now loaded and ready to be used Once the impact device has been loaded use one hand to firmly hold the bottom of the impact device the part that touches the surface you want to measure against the surface and use your other hand to press the release button located on top of the impact device After pressing the button the impact tip will hit the test piece surface and a hardness value will im...

Page 21: ...h 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 Backlight illumination and contrast options can be changed from any screen in the unit Touch to change the backlight illumination Figure 1 6 Backlight illumination options ...

Page 22: ... contrast adjustment To lock the keypad place your finger on the white dot located in the center of the horizontal scrolling bar between the keys Move your finger to the right following the dotted line and a window on the unit display will open with the message Lock see figure 1 8 Continue moving your finger in the same direction until you enter blocked mode The window on the display will close an...

Page 23: ...Chapter 1 9 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 ...

Page 24: ... mode 1 1 Leeb hardness value where L is Leeb and x is the impact device type 2 Datalogger mode indicator X Off M Manual A Auto 3 plus or minus measured value indicator as it relates to the nominal value in differential mode Page 37 4 Battery level indicator 5 Hardness value in the selected hardness unit 6 Icon indicating that a value was stored 7 Blocked keypad icon indicator Page 8 8 Impact devi...

Page 25: ...er 12 Position of the last stored value Column Row 13 Name of the open file where values are being stored Page43 14 User selected test piece material Page 17 15 Number of N values indicator for real time statistics Page 36 Figure 2 2 Measure screen mode 2 Figure 2 3 Measure screen mode 3 16 Leeb hardness value where L is Leeb and x is the impact device type ...

Page 26: ...n all three numerical measure screen modes have the following functions Touch to generate real time statistics based on the number of N stored values at the time this function is activated Touch to manually store the measurement in the memory Touch to switch to the real time graphic histogram mode Touch to exit the measure screen and enter the main menu Touch to view quick memory access options To...

Page 27: ... touch Touch to select material Always use the keys to edit the values in any given field and touch to save Notes The material can only be changed in the numerical measure screen in mode 2 Page 11 The angle and hardness unit can be changed in any measure screen mode When the hardness unit is changed statistics graphics and the actual hardness value on screen are set to zero ...

Page 28: ...nters the direct access function established by the user Set display contrast Lock and unlock keypad The QH5 allows you to view graphic representations of measured values in real time and in two screen modes Figure 2 5 Graphical measure screens mode 1 and mode 2 1 Maximum hardness value within the group 2 Minimum hardness value within the group 3 Average within the group ...

Page 29: ...d hardness unit 12 Histogram bars that represent individual group values 13 Average deviation within the group 14 Range within the group Key functions in the two graphic measure screen modes are the same as in the numerical measure screen modes Page12 except for the following keys Go to the numerical measure screen mode Access the select edit mode Touch this key and 2 flashing arrows will appear o...

Page 30: ...t 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 Figure 2 7 Icons corresponding to the impact device angles ...

Page 31: ...s depend on the impact device that is connected to the unit Before measuring make sure that the impact device you will be using meets your needs in terms of the material hardness unit and hardness range in which you want to measure The QH5 offers you three ways to change the material On the numerical screen in mode 2 only Page 11 touch to enter the select edit mode and touch to select the material...

Page 32: ...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 From the main menu under Unit Page 22 For detailed information on all of the possibilities in terms of the materials hardness units and hardness ranges in which you can measure please refer to the tables in the Appendix Tips on how to measure correctly Page 56 ...

Page 33: ...ch the end of the menu and move to the next menu option it becomes circular as shown herein 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 To go to the measuring screen touch from the main menu or touch from any other menu in the unit Figure 3 2 Going to the measure screen ...

Page 34: ...yboard 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 Touch the key to move to the upper case virtual keyboard and to the numbers and symbols keyboard as seen on figure 3 3 There are 4 keys that are common to all virtual keyboard screens Figure 3 4 Common virtual keyboard keys 1 Move cursor to the left ...

Page 35: ...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 Move the cursor to the right Undo Erase the character to the left of the cursor Enter and exit To close the direct access keyboard and continue using the virtual keyboard touch ...

Page 36: ...es 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 Use the keys to scroll the menu Touch to select the hardness unit Touch to save and exit this menu Figure 3 7 Hardness unit options menu ...

Page 37: ...e set for the high alarm and or when the measurement falls below the value set for the low alarm Touch on Alarms to open the alarm menu options Touch on High or Low to open the numbers editor where you can set alarm values using the cursor keys Touch to save the alarm value that you entered and to return to the previous menu Figure 3 8 Alarm menu options Alarm types that you can choose include Bee...

Page 38: ...istogram range values Touch on Histo Range to open the histogram menu Touch on High or Low to open the numbers editor where you can set values using the cursor keys and touch to save the new value and return to the previous menu Touch on language which is also identified with a flag to view available language options Use the cursor keys to navigate available language options and touch to select To...

Page 39: ...h the keys To return to the main menu touch Note The information required to obtain model upgrade licenses is included in this option Touch on the Configure option to open the general configuration options menu Use the keys to scroll the menu Touch to select any of the menu options Touch to exit and to return to the previous menu Figure 3 11 General configuration options menu ...

Page 40: ...Clock Format to open the menu that allows you to set the time format 12Hs or 24Hs and the date format D M Y M D Y Touch on the option you wish to select and touch to save and exit Figure 3 13 Date and time format menu options This option allows you to set the keypad sensitivity The number that you set here has a direct relationship to the sensitivity of your keypad meaning that the higher the numb...

Page 41: ... other key or the on screen counter 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 If the unit will operated using security gloves we recommend that the sensitivity level be raised To make the keypad harder simply lower the sensitivity level In applications where the fr...

Page 42: ...he keys to set the time and touch to save and exit Touch to exit without making changes Figure 3 15 AutoOff time setting screen Contrast settings allow you to turn your screen lighter or darker where 1 is the lightest and 32 is the darkest Touch on Contrast and use the keys to change the contrast on your screen Touch to save or touch to exit without making changes Figure 3 16 Screen contrast setti...

Page 43: ...le or disable the beep option The introduction screen is the first screen that you see after the unit is turned on and includes owner information such as name telephone number and e mail Touch to enable or disable this option This option allows you to enter owner information the info that would appear on the introduction screen Touch on Set ID enter the password the factory default password is 123...

Page 44: ... 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 Notes To set or change text see page 20 When showing user information the e mail address is displayed as Name Domain Important The factory default password is 12345 You can change this password after adding your user information ...

Page 45: ... has been properly configured and that the settings cannot be changed Touch on Locks enter your password and then touch again to view the configuration options that can be locked Figure 3 18 Enter password and options lock menu Each option is followed by a lock indicating whether the feature is locked closed lock or unlocked open lock Touch on each of the following options to lock or unlock Config...

Page 46: ...d like to purchase Touch on Licenses to view all licenses available for your unit checkmarks indicate active licenses Figure 3 19 Licenses screen To enter the new license number that you purchased touch or to exit and return to the previous screen touch Use the cursor keys to enter the license number and touch to save Figure 3 20 Enter license screen After you enter the new license number the unit...

Page 47: ... screen where the newly purchased license appears followed by a checkmark Choose Set Default to return to the original factory default general configuration options Touch and a confirmation screen will appear Touch to confirm and return to the previous menu or touch to exit without making changes Figure 3 22 Set factory default settings confirmation screen ...

Page 48: ...measurements Figure 3 23 Measuring configuration options menu Touch on Angle to select the angle in which the impact device will be used Use the keys to scroll all menu options and touch to select To exit without making changes touch Figure 3 24 Set Impact device angle menu The angle you select here will also show on the measuring screen with the corresponding icon ...

Page 49: ...scroll all menu options and touch to select To exit without making changes touch Figure 3 25 Materials menu In the measuring screen the is used to quickly access any of the options below as configured by you Touch on to open all quick access options Figure 3 26 Quick access options menu for the Plus key Quick access options that can be set for the key are Angle To change the impact device angle Un...

Page 50: ...stical purposes and to set the number of columns in the Datalogger Every N number of values all statistical data for any given group is automatically updated and the group is closed in the Datalogger Partial statistics can be viewed at anytime by touching the key Touch on Group N to open the numbers editor where you can set the N number Touch to save and then touch to exit Note Every time the hard...

Page 51: ...d from calculating Differential Real value Nominal value The nominal value is a reference value for the test piece Touch on Nominal to set this value and touch to save To exit without making any changes touch The QH5 allows you to create two customer or user units to measure uncommon materials that are not included in the predetermined list of materials in the unit as well as to measure special al...

Page 52: ...hing choosing user unit 1 or 2 makes no difference and enter the first reference point Figure 3 29 First user unit reference point To enter the first user unit reference point you must make N number of measurements on the test piece of the uncommon material or alloy of a known hardness value Two options will appear on your unit screen N 0 Use the key to reset the counter to 0 if a wrong measuremen...

Page 53: ...reference point to the newly created unit Ready Touch to finish the process for creating a new user unit User units created with one reference point are precise for measurements that are close to the test piece sample hardness used to create the user unit in the first place In order to extend the measuring range for the newly created unit we recommend that another reference point be added using a ...

Page 54: ...reated using two reference points the first point must be of a lower hardness value than the second point or the operation will be automatically cancelled Even though a user unit has a different name for example a user unit created using the Brinell HB hardness unit would be HU1 HB measurements done with this user unit will display hardness values in HB only User units are only available for the m...

Page 55: ...mpact device options menu The options displayed in this menu will depend on your QH5 model In order for you to better understand the relationship that exists between unit models impact devices materials and hardness units as well as hardness ranges please refer to page 56 Use the keys to scroll all menu options and touch to select To exit without making changes touch Figure 3 31 Impact device menu...

Page 56: ...st block at least every 500 impacts to verify its condition And in order to remind the operator we included the Tip Alarm option that is activated when the automatic counter in the unit reaches the limit set by you Select Every to set the alarm limit default value is 500 and use Reset to set the counter back to zero each time the tip is replaced or the impact device is changed Figure 3 32 Set impa...

Page 57: ...ed with a column letter and a row number Figure 4 1 How data is organized in the Datalogger In the above grid structure individual values are stored in a Column Batch Row Cell So for example C 4 764 HL means this value is located in Column C and Row 4 Column or Batch sizes can be set in the number of Group N values Page 36 so that each time this N number is reached a batch is closed and a new one ...

Page 58: ...2 Memory menu Touch on Files and use the cursor keys to navigate the list of files in the unit Figure 4 3 Creating a file Select a file that appears as Empty available file and touch to name the file with up to 10 alphanumeric characters After you enter a name a checkmark will appear next to it meaning that a new file has been created and is ready to be used ...

Page 59: ...iles values can only be viewed Whenever you create a new file and another file is already open a warning screen will ask if you want to close the last file Touch to confirm that you want to close the open file to create open a new one or touch to cancel and return to the menu Figure 4 4 Close file confirmation screen Touch on any file that is not empty and a menu will open with all of the options ...

Page 60: ...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 values included in the foregoing cells within that column Touch to exit and return to the grid Figure 4 7 Columns histogram High and low hardness alarms appear in the histogram as dotted horizontal lines ...

Page 61: ...ptions 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 Column Enter the column letter using the cursor keys so that when you touch the grid will position itself on that column Cell This is a combination of column and row so that you can go to a specific cell after you enter the row number and column letter ...

Page 62: ... and error percentage values in the batch based on the high and low alarm settings Stats View statistical information for the batch including Min Max Range and Mean values Stats View the standard deviation and the percentage coefficient variation for the batch Touch on Send File to send units with Datalogger only a single file to a PC using Windows HyperTerminal or to a printer using an RS232 conn...

Page 63: ... for actions that will affect all files stored in the unit memory Figure 4 10 Actions over all files menu Touch on Send All to send units with Datalogger only all files stored in the unit memory to a PC using Windows HyperTerminal or to a printer using an RS232 connection This option does not work in USB mode The Erase All action permanently deletes all files stored in the unit memory and recovers...

Page 64: ... 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 Figure 4 13 Quick memory menu options In each quick memory menu screen three options are displayed To access these options use the keys To change memory screens use the key as seen on figure 4 13 ...

Page 65: ...ed value Options in the second quick access memory screen Time Inserts the time when the value was stored Auto Activates the auto capture mode Manu Activates the manual capture mode Touch on Connect to enter the waiting to connect mode Touch to exit and cancel the connection Figure 4 14 Connecting to a PC With the unit in waiting to connect make sure that the USB or the RS232 cable depending on th...

Page 66: ...included in the CD that you received with your QS5 or download the manual at http www demeq com Download html In the memory menu touch on Configure to open the Datalogger configuration options menu Figure 4 15 Datalogger configuration options menu The first two options in the configure Datalogger menu are Mode and Send which allow you to select how the unit will communicate with a PC or a printer ...

Page 67: ...elect whether you will send files to a PC or a printer PC When using an RS232 cable the unit sends data in an optimal format for Windows HyperTerminal 38400 8 N 1 Print Using an RS232 cable and printer the unit sends data in an optimal format for mini printers of 40 columns 9600 8 N 1 Notes The print option can only be used in RS232 Files cannot be directly sent to a USB printer When you use DataC...

Page 68: ... 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 When this option is selected you can also store values when you touch the key Touch on Advanced to access the advanced configuration options menu for the Datalogger Figure 4 18 Advanced configuration options menu ...

Page 69: ...story to enable or disable this option and touch to exit Touch on Clock to set the time and date options that will be recorded by the Datalogger each time a new batch is opened Touch to scroll all menu options and touch to select and exit Touch to exit without making changes Clock menu options include Off The Datalogger does not record date and time Date Each time a new batch is opened the Datalog...

Page 70: ... type D DC D 15 DL C G E Steel and cast steel HB 80 647 80 638 80 647 80 683 90 646 83 663 HV 80 940 80 937 80 940 80 996 84 1211 HRA 61 88 HRB 38 99 38 96 48 100 HRC 20 68 19 68 20 68 20 70 22 71 HS 32 99 33 99 32 100 36 103 MPa 275 2194 275 2180 275 2194 275 2194 305 2194 283 2195 Alloy tool steel HV 80 898 80 935 82 1009 HRC 20 67 20 68 22 70 Stainless steel HB 85 655 HV 85 802 HRB 46 101 HRC 2...

Page 71: ...ks with impact device type G The QH5 M works will all impact devices Do not measure over an indentation caused by a previous measurement The surface you are measuring must clean and dry The minimum surface roughness requirements needed to obtain precise measurements are Impact device type D DC D 15 DL C G E Surface condition rugosity Rugosity N7 N7 N7 N5 N9 N7 Rugos RT µm 10 10 10 2 5 30 10 Rugos ...

Page 72: ...th support 2 4 4 2 4 4 2 4 4 0 5 1 1 5 11 2 4 4 Coupled 0 1 0 22 0 1 0 22 0 1 0 22 0 02 0 04 0 5 1 1 0 1 0 22 Minimum test piece thickness mm inch Coupled 3 6 6 3 6 6 3 6 6 1 2 2 10 22 3 6 6 Superficial 0 8 1 76 0 8 1 76 0 8 1 76 0 2 0 44 0 8 1 76 When working with a portable hardness tester you should always average at least 3 measurements the QH5 does real time statistics and the measurements mu...

Page 73: ...uring on curved surfaces Control your impact device on a reference test block at least every 500 impacts to check its condition Always make sure that the unit has been correctly configured for material impact device type and impact device angle Do not use lubricants or grease in the mechanical parts of your impact device The impact device is cleaned using the brush included with the unit ...

Page 74: ...Brinell Vickers Shore Rockwell A B and C Resolution Entire Hardness Range Leeb 1 HL Brinell 1 HB Vickers 1 HV Shore 0 1 HS Rockwell 0 1 HRA B C Measuring Range 150 HL to 990 HL Precision 0 5 800 HLD 4 HLD Real Time Statistics Maximum Minimum Medium Range and Standard Deviation Alarms High and Low Visible and Audible Languages English Spanish and Portuguese Datalogger Up to 32500 values in 8 files ...

Page 75: ... 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 Weight 200g with batteries ...

Page 76: ...he following precautions should be considered Avoid contact with corrosive and abrasive substances Do not clean the unit with solvents Do not leave the unit display exposed to direct solar light for prolonged periods of time as this could damage the display Remove the batteries if the unit will be stored for an extended period of time Remove the impact device using the connector and not the cable ...

Page 77: ...pe G impact device wtih Cal Tag QHP 001 Test block HLD QHP 101 Certified HLD test block QHP 002 Test block HLG QHP 102 Certified HLG test block QHA 012 Set of support rings 12 each QHG 001 Coupling paste small QHG 002 Coupling paste large QHL 103 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 ...

Page 78: ...ml 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 Removing batteries and powering the unit back on to store values in the Datalogger Solution Download Datalogger values to PC or printer and erase memor...

Page 79: ... information New accessories 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...

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