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MiniMax

Bolt Tension Monitor

Note:

Enter the known ultrasonic length of the bolt that was documented and

stored in the previous section. We will consider this ultrasonic length to be the

actual physical length from this point forward. Reminder: It was stored in the

first column of the probe zero group.

8) Press the

and

arrow keys multiple times to scroll the highlighted

value.

9) Press the

and

arrow keys multiple times to scroll the digit

locations.

10) Repeat steps

8 & 9

until the

PHY LEN 1

value is correctly displayed.

11) Press the

key to return to the

One Point Zero List

, or

to cancel

entering the

PHY LEN 1

value.

12) Press the

and

arrow keys multiple times to scroll through the

One

Point Zero List Items

until

VELOCITY

is highlighted.

13) Press the

key to display the

Digits Edit Box

Note:

Enter the velocity value of the bolt that was documented in the previous

section. Reminder: The value was written down and scribed on the side of the

bolt, and is the velocity used for the probe zero bolt.

Содержание MiniMax v2.0

Страница 1: ...OPERATION MANUAL DAKOTA ULTRASONICS MiniMax v2 0 Ultrasonic Bolt Tension Monitor P N P 156 0005 Rev 3 00 June 2019...

Страница 2: ......

Страница 3: ...A NEW GROUP TO STORE MEASUREMENTS 11 3 5 SETTING THE APPROXIMATE LENGTH 19 3 6 MEASURING REFERENCE LENGTHS 22 3 7 MEASURING ELONGATIONS 23 CHAPTER FOUR KEYBOARD MENU CONNECTOR REFERENCE 25 4 1 MENU KE...

Страница 4: ...TER EIGHT MEASURING SYSTEM ZERO CALIBRATION 45 8 1 INTRODUCTION 45 8 2 CALIBRATION ZERO MISNOMER 45 8 3 CREATING A GROUP TO DOCUMENT ZERO CALIBRATION DATA 46 8 4 AUTO ZERO CALIBRATION 54 8 5 USING A S...

Страница 5: ...13 2 CONTRAST 148 13 3 BACKLIGHT 149 13 4 GRAPHICS OPTIONS LOOK FEEL 150 13 5 PULSE 152 13 6 PULSER VOLTAGE 153 13 7 DAMPING 154 13 8 DIGITIZER 155 13 9 POLARITY 156 13 10 ALARM MODE 157 13 11 KEY CLI...

Страница 6: ...UP 182 15 5 USING THE DEFAULT SETUP 184 15 6 SELECTING A LANGUAGE 185 CHAPTER SIXTEEN SOFTWARE FILE TRANSFER UPGRADES 187 16 1 COMPUTER SYSTEM REQUIREMENTS 187 16 2 INSTALLING DAKVIEW 187 16 3 COMMUNI...

Страница 7: ...chanical methods and the MiniMax are complimentary and used in conjunction Dakota Ultrasonics maintains a customer support resource in order to assist users with questions or difficulties not covered...

Страница 8: ...eath 1 3 Warranty The Dakota Ultrasonics MiniMax carries a two year limited warranty The warranty only applies to MiniMax units being operated as described in this manual Software and hardware failure...

Страница 9: ...new user careful consideration of this entire manual is highly recommended 2 2 New to fastener measurement Assuming you are familiar with ultrasonics but unfamiliar with fastener measurement the chapt...

Страница 10: ...our bolting applications Let s have a brief look at the screens you ll be looking at most often A Repeatability Stability Indicator Indicates the reliability of the measured bolt length When all the v...

Страница 11: ...Markers Measurement scale of length K Units Displays the current measurement units being used English Metric L Gain The current gain setting can be adjusted at any time while in measurement mode M Te...

Страница 12: ...y multiple times to tab left through the hot menu cells Refer to Chapter Four for additional definitions and information on the keypad and menu items Hot Menu Items Note Log and Temp are also listed i...

Страница 13: ...x Bolt Tension Monitor 7 End DATA UTILS XFER NEW TEMP MODE UPGRADE GAUGE EDIT ALARM CAPTURE TO FILE OPEN ALARM LOW ABOUT CLOSE ALARM HIGH DELETE ONE FILE KEY CLICK DELETE ALL DATA SET DATE SHOW DATE S...

Страница 14: ...nsducer and plug it into the MiniMax 3 If a temperature sensor is being used connect the sensor to the MiniMax 3 3 Setting up the MiniMax Please Read In this section the MiniMax will be setup in its s...

Страница 15: ...tab right and the key multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items 3 Use the and arrow keys multiple times to scroll through the sub menu items until...

Страница 16: ...ITS is highlighted 3 Press the and arrow keys to scroll through the unit options IN inches IN HR inches hi resolution MM millimeters and MM HR millimeters hi resolution Note The high resolution option...

Страница 17: ...to display the list material types 3 Press the and arrow keys multiple times to scroll through the material list until the appropriate type is highlighted 4 Press the key to display the confirmation...

Страница 18: ...keys multiple times to scroll through the sub menu items until NEW is highlighted 3 Press the key to display the New Group Edit Box 4 Press the and arrow keys multiple times to scroll through the new...

Страница 19: ...save the Group Name and return to the Group List Items menu or to cancel entering the Group Name Creating a Group Note 1 Press the and arrow keys multiple times to scroll through the new Group List It...

Страница 20: ...menu or to cancel entering the Group Note Selecting the Number of Bolts in the Group Note A group can contain up to 250 bolts There must be at least 1 bolt in a group 1 Press the and arrow keys multip...

Страница 21: ...d 7 Press the key to display the Digits Edit Box and re enter the NUM BOLTS 8 Press the key to save the NUM BOLTS and return to the Group List Items menu or to cancel entering the NUM BOLTS Selecting...

Страница 22: ...displayed 7 Press the key to display the Digits Edit Box and re enter the NUM READS 8 Press the key to save the NUM READS and return to the Group List Items menu or to cancel entering the NUM READS I...

Страница 23: ...eat steps 3 4 until the START BOLT NUM value is correctly displayed 6 Press the key to save the START BOLT NUM and return to the Group List Items menu or to cancel entering the START BOLT NUM Note If...

Страница 24: ...keys multiple times to scroll through the new Group List Items until INCR DIR is highlighted 2 Press the and arrow keys multiple times to toggle the Increment direction NONE NORTH EAST SOUTH or WEST 3...

Страница 25: ...e lengths 3 5 Setting the Approximate Length In order to utilize the AUTO SET feature of the MiniMax when measuring reference lengths the MiniMax has to know where to start looking for the detection W...

Страница 26: ...to scroll the highlighted value 4 Press the and arrow keys multiple times to scroll the digit locations 5 Repeat steps 3 4 until the ALEN value is correctly displayed 6 Press the key to return to the...

Страница 27: ...u items until APPROX LEN is highlighted 3 Press the key to display the Digits Edit Box 4 Press the and arrow keys multiple times to scroll the highlighted value 5 Press the and arrow keys multiple tim...

Страница 28: ...target cell cursor to the desired storage location Note The approximate lengths must always be located in the first column A for all bolts in the group 4 Place a small amount of couplant on the trans...

Страница 29: ...ime by pressing the key 3 7 Measuring Elongations Now that the reference lengths have been measured and saved we re ready to start measuring elongation values We ll start off by assuming the bolt has...

Страница 30: ...is only used when measuring reference lengths If the key is accidentally pressed press it again to turn the high speed mode off 2 Press the key to save the current elongation in the highlighted cell...

Страница 31: ...menu tab groups These tab groups then contain sub menu items or functions The sub menu items have been organized in tab groups according to how closely they are related to the individual tab group na...

Страница 32: ...gst the tab groups let s have a look at how to move around in the sub menu items as follows Getting Around in the Sub Menu Items 1 Use the and arrow keys to scroll through the sub menu items until the...

Страница 33: ...een selected above this function displays and calculates the actual measurement screen containing the known physical length velocity and temperature coefficient of the calibration standard versus the...

Страница 34: ...a by the user if necessary STRESS FACTOR This feature allows the user to edit the stress factor at anytime Once a material type is selected the stress factor of the selected material type is stored in...

Страница 35: ...the area at anytime Refer to page 106 for further info EFFECTIVE LENGTH The length of the region of the fastener under stress the distance between the nut plus some amount of additional stress that o...

Страница 36: ...pulser option selected The standard setting is 150 volts This enables the MiniMax to offer greater penetration for difficult material types or increased resolution on noisy materials Refer to page 153...

Страница 37: ...OLD1 Enables the user to set the sensitivity level of Gate1 The amplitude of the signal must reach or exceed the threshold level before a measurement is detected Refer to page 135 for further info 4 8...

Страница 38: ...essible Refer to page 184 for further info LANGUAGE Provides the user the ability to select different languages for the MiniMax Refer to page 185 for further info 4 10 DATA Menu NEW Allows the user th...

Страница 39: ...its purchased with the automatic temperature compensation option and probe Note Contact Dakota for information on upgrading the MiniMax Refer to page 91 for further info ALARM Toggles alarm mode on of...

Страница 40: ...mary functions of the CLR key are to clear a measurement from a grid or sequential log files cell location or set an obstruct backspace in an Alpha Edit Box If a user has already saved a measurement a...

Страница 41: ...on keys 4 18 ENTER key The ENTER key is used in the overall menu selection process to activate list and edit boxes display and save measurements to a group file location 4 19 AUTO SET Key The AUTO SET...

Страница 42: ...Press the key once to display the measure screen and multiple times to advance the cursor to the next cell right or to advance to the next cell left until the desired function is highlighted 2 Press...

Страница 43: ...d on the back label of the MiniMax Note Rechargeable batteries can be used however they must be recharged outside of the unit in a stand alone battery charger USB Type B Connector Refer to Diagram The...

Страница 44: ...Send a pulse of energy toward an object in this case the opposite or reflecting end of the fastener and then measure the time between the initial pulse and the returning echo While the concept is com...

Страница 45: ...5 MHz pulse Therefore a lower frequency transducer is able to achieve an echo in a longer bolt or in a bolt made of metal with higher resistance to sound transmission attenuation While the lower frequ...

Страница 46: ...ducer and the end of the bolt will prevent the sonic energy from crossing The gap must be filled with a suitable coupling fluid Normally a liquid ultrasonic couplant is applied between the transducer...

Страница 47: ...l be transmitted toward the side wall and reflect along the bolt yielding poor signal quality and possible measurement errors Avoid alignment errors exceeding 2 degrees Figure 2 Rough and angled trans...

Страница 48: ...cause significant errors Avoid Rough reflecting bolt ends As shown in Figure 4 if the reflecting end of the bolt is rough or curved most of the reflected energy will be dispersed and a weak or distor...

Страница 49: ...MiniMax Bolt Tension Monitor 43 Figure 6 Reflection in a bending bolt...

Страница 50: ...cting the proper frequency the following items should be taken into consideration Higher frequencies are typically a better choice when measuring smaller diameter bolts as the sound is better focused...

Страница 51: ...em Since every zeroed MiniMax makes the same time measurement the systems give the same result and are interchangeable System Zeroing is only required if More than one MiniMax or transducer will be us...

Страница 52: ...d conditions of the application itself 8 3 Creating a Group to Document Zero Calibration data The first step is to setup a group to document our probe zero data By doing this all the values and settin...

Страница 53: ...Items until NAME is highlighted 5 Press the key to activate the Alpha Edit Box 6 Press the arrow keys to highlight the appropriate alpha characters 7 Press the key to select a character and advance to...

Страница 54: ...l through the new Group List Items until NOTE is highlighted 2 Press the key to activate the Alpha Edit Box 3 Press the arrow keys to highlight the appropriate alpha characters 4 Press the key to sele...

Страница 55: ...olt is used the group will contain 1 bolt If the 3 6 cal bars are being used then the group should contain 2 bolts If the triple sided glass block is being used then the group should contain 3 bolts 1...

Страница 56: ...gs Per Bolt Note A bolt can have up to 51 possible measurements and 1 initial length L REF There must be at least one reading per bolt Since this group is being created to store Zero Cal Data and veri...

Страница 57: ...splay the Digits Edit Box and re enter the NUM READS 8 Press the key to save the NUM READS and return to the Group List Items menu or to cancel entering the NUM READS If there s not enough memory avai...

Страница 58: ...eys multiple times to scroll the digit locations 5 Repeat steps 3 4 until the START BOLT NUM value is correctly displayed 6 Press the key to save the START BOLT NUM and return to the Group List Items...

Страница 59: ...keys to scroll through the new Group List Items until INCR DIR is highlighted 2 Use the and arrow keys to toggle the Increment direction NONE NORTH EAST SOUTH or WEST 3 When the correct Increment dir...

Страница 60: ...ignal quality and calibration standard used may not always work If valid signals cannot be acquired during the auto set routine the MiniMax will report Can t find stable echo Before eliminating this o...

Страница 61: ...menu items until ZERO MODE is highlighted 3 Press the and arrow keys multiple times to scroll the zero mode options until the AUTO option is displayed Note The auto option will perform a two point zer...

Страница 62: ...arrow keys multiple times to scroll the highlighted value 9 Press the and arrow keys multiple times to scroll the digit locations 10 Repeat steps 8 9 until the PHY LENGTH value is correctly displayed...

Страница 63: ...c for the 3 6 bars supplied by Dakota Ultrasonics If the glass block is used it should be set to 0 The reason for this is because glass has a very low temperature coefficient 18 Press the and arrow ke...

Страница 64: ...and display the new velocity and zero values or to cancel the calibration Note If was pressed to calculate the new values pressing the key once will display the CAL menu to review the new ZERO value...

Страница 65: ...eys multiple times to scroll the highlighted value 29 Press the and arrow keys multiple times to scroll the digit locations 30 Repeat steps 21 22 until the VELOCITY value is correctly displayed 31 Pre...

Страница 66: ...with both ends ground and polished can make a simple and effective calibration standard The primary objective is to verify a zero value prior to measuring to avoid measurement errors if the MiniMax tr...

Страница 67: ...til TYPE is highlighted 3 Press the key to display the list of material types 4 Press the and arrow keys multiple times to scroll through the material list until the appropriate material is highlighte...

Страница 68: ...rough the sub menu items until ZERO MODE is highlighted 3 Press the and arrow keys multiple times to scroll the zero mode options until the FIXED option is displayed Note Each time the arrow keys are...

Страница 69: ...es until the appropriate bolt type is highlighted 8 Press the key to display the confirmation screen 9 Press the key to select the bolt type and return to the menu screen or press to cancel the bolt t...

Страница 70: ...ptions until the ELONG option is displayed 14 Press the key multiple times to tab right and the key multiple times to tab left until the AUTO menu is highlighted and displaying the submenu items 15 Pr...

Страница 71: ...ghted Note Both the Approximate Length and Auto Set feature could have also been set and activated using the Hot Menu Items and key as well However since we are already in the Tab Menu Items it was ju...

Страница 72: ...a for the probe zero bolt we need to document it as outlined in the next section Storing the Reference Length 1 Press the key once to activate measure menu items Press the key multiple times to move r...

Страница 73: ...o calibration bolt In this case calculating the probe zero value forces the new hardware to match with the original If the hardware has not changed the user should not use this feature If the hardware...

Страница 74: ...sed a confirmation screen will appear to warn the user that the zero mode is being changed Press the OK key to advance to the next mode option 4 Press the and arrow keys multiple times to scroll throu...

Страница 75: ...row keys multiple times to scroll the digit locations 10 Repeat steps 8 9 until the PHY LEN 1 value is correctly displayed 11 Press the key to return to the One Point Zero List or to cancel entering t...

Страница 76: ...the and arrow keys multiple times to scroll through the One Point Zero List Items until TEMP COEF is highlighted 19 Press the key to display the Digits Edit Box Note Enter the temperature coefficient...

Страница 77: ...TRASONIC 1 is highlighted 25 Press the key to display the measurement screen 26 Press the key to automatically adjust the settings and measure the calibration standard 27 Press the and arrow keys mult...

Страница 78: ...d it s because the temperature of the bolt has changed In this case the zero value should not be changed but the temperature value should be Therefore the bolt becomes sort of a temperature sensor in...

Страница 79: ...ey to display the Group View Box 3 Press the arrow keys to scroll the stored readings and corresponding display view Notice as the cursor is moved to a different cell the display will be updated with...

Страница 80: ...to national standards The primary advantage of using these bars block versus setting a standard bolt aside as explained in the previous section is the possibility of losing the stand alone bolt Becaus...

Страница 81: ...rometer or other method will be used the temperature mode should be set to manual and the temperature manually entered into the gauge 1 With the menu items still active from the previous section press...

Страница 82: ...ase of a one point calibration 4 Press the and arrow keys multiple times to scroll through the sub menu items until MEASURE ZERO is highlighted 5 Press the key to display the Two Point Zero list box 6...

Страница 83: ...to the Two Point Zero list or to cancel entering the PHY LEN 1 12 Press the and arrow keys multiple to scroll through the Two Point Zero list until PHY LEN 2 is highlighted Note PHY LEN 2 is the actua...

Страница 84: ...is a velocity for each cal bar use the velocity of the longest cal bar as it will be most significant 6 bar If the glass block is being used it will have only one velocity specified for the block 19...

Страница 85: ...and arrow keys multiple times to scroll the highlighted value 27 Press the and arrow keys multiple times to scroll the digit locations 28 Repeat steps 26 27 until the TEMP COEF value is correctly disp...

Страница 86: ...e correct measurement value during calibration the material velocity and temperature coefficient must be set to the same values as in the calibration section and the stress factor set to 1 000 34 Pres...

Страница 87: ...ration unless the transducer transducer cable or instrument has been changed In any event the probe zero calibration should always be checked prior to changing it and only changed if it s required If...

Страница 88: ...This will set the quantity display in terms of elongation Note In order to record the data for both the 3 6 1 3 glass block the CAL DATA group created in an earlier section must be opened 4 Press the...

Страница 89: ...he log followed by pressing the to confirm load from memory or to cancel opening the log file 9 Press the key multiple times to tab right and the key multiple times to tab left until the CAL menu is h...

Страница 90: ...GAIN as well as the POLARITY may need to be adjusted Using a large diameter transducer can produce an extremely strong signal and often the gain can be turned down to allow the user to see the peaks...

Страница 91: ...ept the calibration and return to the Two Point Zero list or to cancel the calibration 24 Press the and arrow keys multiple times to scroll through the Two Point Zero list until CALC ZERO is highlight...

Страница 92: ...the CAL DATA group Note Since the last data point taken was ULTRASONIC 2 or the 6 cal bar press the arrow keys multiple times to highlight A2 for the first reading of the 6 cal bar 36 Press the key to...

Страница 93: ...s to move right and the key multiple times to move left until the LOG cell is highlighted to display the CAL DATA group 41 Press the key to display the CAL DATA group 42 Press the arrow keys multiple...

Страница 94: ...d redo the zero cal procedure in its entirety The next section outlines the verification procedures Verifying the Probe Zero at a Later Time 1 Press the key once to activate the menu items tab Press t...

Страница 95: ...ransducer and attach it to one end of the cal standard Rotate the transducer clockwise and counter clockwise applying a small amount of pressure to eliminate any excess couplant between the transducer...

Страница 96: ...all the columns B ZZ for each individual bolt Therefore no adjustments to the MiniMax should be necessary 10 If the elongation is 0005 and In Spec Press the key to save the current reading in the hig...

Страница 97: ...The thermal expansion of the fastener and the ultrasonic change in velocity as a result of temperature are two separate effects However for the purpose of the MiniMax they are combined in a single fa...

Страница 98: ...o scroll the highlighted value 6 Alternatively press the key to display the Digits Edit Box 7 Press the and arrow keys multiple times to scroll the highlighted value 8 Press the and arrow keys multipl...

Страница 99: ...menu is highlighted and displaying the submenu items 2 Press the and arrow keys multiple times to scroll through the sub menu items until TEMP MODE is highlighted 3 Press the and arrow keys multiple t...

Страница 100: ...t or fastener and not accidentally removed or misplaced during the measurement process Selecting Automatic Temperature Mode 1 Press the key once to activate the menu items tab Press the key multiple t...

Страница 101: ...material the result will always be an average value of that sample 10 2 Velocity Calibration A velocity calibration is generally performed by adjusting the velocity in the MiniMax to the point where t...

Страница 102: ...to display the list of bolt material types 7 Press the and arrow keys multiple times to scroll through the material list until the appropriate material type is highlighted Note If the material type i...

Страница 103: ...Press the key to display the Digits Edit Box 13 Press the and arrow keys multiple times to scroll the highlighted value 14 Press the and arrow keys multiple times to scroll the digit locations 15 Rep...

Страница 104: ...tion This will help to eliminate any potential measurement errors caused by changing the sound path 19 Press the key and the Ultrasonic Length of the bolt will be displayed Note Alternatively the key...

Страница 105: ...to set the Velocity and return to the menu screen or to cancel entering the Velocity 28 Finally press the key to return to the measurement screen The ultrasonic length displayed should now match the...

Страница 106: ...ical or electronic height gages Averaged values of length measurement with mechanical and electric micrometers A Dakota Ultrasonics MiniMax Ultrasonic Bolt Tension Monitor A minimum of three sample bo...

Страница 107: ...the bolt Rotate the transducer clockwise and counter clockwise applying a small amount of pressure to eliminate any excess couplant between the transducer and bolt Be sure to always place the transdu...

Страница 108: ...y a drop of couplant to the bolt or transducer and attach it to one end of the bolt Rotate the transducer clockwise and counter clockwise applying a small amount of pressure to eliminate any excess co...

Страница 109: ...ure range only The primary thing to consider is to use a respectable temperature range with at least 5 different temperature points The following procedure outlines the process for experimental determ...

Страница 110: ...mperature Factor L0 Ultrasonic Length at Beginning Temperature T0 LT Ultrasonic Length at Ending Temperature T T0 Beginning Temperature T Ending Temperature Calibrating the Temperature Factor 1 Stabil...

Страница 111: ...at the target temperatures T1 through T5 48 68 88 and 108 0 F other similar range with 5 temperatures measuring the ultrasonic lengths L1 through L5 respectively This process must be done for each of...

Страница 112: ...between load and elongation is a function of the elasticity of the bolt material and the geometry of the bolt in the application being measured Hooke s Law expresses this relationship E L AE l P Hooke...

Страница 113: ...of Elasticity of the Bolt Material From Manufacturer The effective length is the average length of the fastener under stress when a load is applied For an applied constant load the elongation of a fas...

Страница 114: ...erial constants are unknown or cannot be calibrated in a laboratory environment In cases such as these a field calibration is the most accurate means of calibration A field calibration is accomplished...

Страница 115: ...ich method is most suitable for the application and producing the best results 11 3 Performing a Field Calibration This section outlines the necessary procedures to perform a field calibration to dete...

Страница 116: ...tiple times to tab left until the DATA menu is highlighted and displaying the submenu items 2 Press the and arrow keys multiple times to scroll through the sub menu items until NEW is highlighted 3 Pr...

Страница 117: ...o the next field of the Group Name 8 Use the key to backspace if necessary 9 Repeat steps 6 8 until the Group Name is completed 10 Press the key to save the Group Name and return to the Group List Ite...

Страница 118: ...riate alpha characters 4 Press the key to select a character and advance to the next field of the Group Note 5 Use the key to backspace if necessary 6 Repeat steps 3 5 until the Group Note is complete...

Страница 119: ...ow keys multiple times to scroll the highlighted value 4 Press the and arrow keys multiple times to scroll the digit locations 5 Repeat steps 3 4 until the NUM BOLTS value is correctly displayed 6 Pre...

Страница 120: ...value is correctly displayed 6 Press the key to save the NUM READS and return to the Group List Items menu or to cancel entering the NUM READS 7 Press the key to display the Digits Edit Box and re ent...

Страница 121: ...ltiple times to scroll through the new Group List Items until START BOLT NUM is highlighted 2 Press the key to display the Digits Edit Box 3 Press the and arrow keys multiple times to scroll the highl...

Страница 122: ...s menu or to cancel entering the START BOLT NUM Selecting the Auto Increment Direction The Auto Increment feature gives the user the ability to specify which direction to advance the cursor after stor...

Страница 123: ...UP is highlighted 2 Press the key to accept the group parameters and activate the confirmation screen 3 Press the key to save the New Group or the key to cancel the New Group setup and return to the D...

Страница 124: ...highlighted 2 Press the key to display the Group View Box 3 Press the arrow keys to scroll the target cell cursor to the desired storage location Note The first column must be used to store reference...

Страница 125: ...steps assume that the user has previously selected a similar material type for the list of materials and the approximate length of the bolt has been entered Therefore the MiniMax is currently setup a...

Страница 126: ...Known Load value is correctly displayed 9 Press the key to store the Known Load and return to the measurement screen or to cancel entering the Known Load 10 Increase the applied load to approximately...

Страница 127: ...le times to scroll the highlighted value 19 Press the and arrow keys multiple times to scroll the digit locations 20 Repeat steps 18 19 until the Known Load value is correctly displayed 21 Press the k...

Страница 128: ...reen Note The regression or vector coefficient will be displayed The closer this number is to 1 the better the fit or least amount of error 4 Press the key to accept the calculation or the key to canc...

Страница 129: ...is required as the measurement is simply a difference equation The stress factor and velocity will typically not vary more than 5 in total over the entire range of possible steel fasteners Therefore t...

Страница 130: ...specific detection point The RF waveform view is recommended when initially setting up the MiniMax for an application The user can consider either a full RF wave or split screen RF option This displa...

Страница 131: ...right and the key multiple times to tab left until the DISP menu is highlighted and displaying the submenu items 2 Press the and arrow keys multiple times to scroll through the sub menu items until VI...

Страница 132: ...For both RF and Rectified views it s important to note that a measurement must fall inside the displays viewable range in order to see the waveform However even if the waveform is outside of the view...

Страница 133: ...n Markers Measurement scale of length K Units Displays the current measurement units being used English Metric L Gain The current gain setting can be adjusted at any time while in measurement mode M T...

Страница 134: ...o move right and the key multiple times to move left until the WIDTH cell is highlighted 2 Press the and arrow keys multiple times to scroll the highlighted value 3 Alternatively press the key to disp...

Страница 135: ...TH is highlighted 3 Press the and arrow keys multiple times to scroll the value When the correct width is being displayed proceed to step 8 4 Alternatively press the key to display the Digits Edit Box...

Страница 136: ...LAY cell is highlighted 2 Press the and arrow keys multiple times to scroll the highlighted value 3 Alternatively press the key to display the Digits Edit Box 4 Press the and arrow keys multiple times...

Страница 137: ...ess the and arrow keys multiple times to scroll the value When the correct Delay is being displayed proceed to step 8 4 Alternatively press the key to display the Digits Edit Box 5 Press the and arrow...

Страница 138: ...m If you turn it up too much you can t hear the music clearly If it s turned down too much you can t hear it at all The procedures to adjust the Gain are outlined below Adjusting the Gain using the Ho...

Страница 139: ...ess the key once to activate the menu items tab Press the key multiple times to tab right and the key multiple times to tab left until the TUNE menu is highlighted and displaying the submenu items 2 P...

Страница 140: ...urn to the measurement screen and begin taking readings The step size of the gain increment can also be adjusted by the user The procedure to set a specific gain increment amount is outlined below Adj...

Страница 141: ...el entering the Step Size 9 Finally press the key to return to the measurement screen and begin taking readings 12 5 Gate The MiniMax is equipped with a single gate typically used to block or eliminat...

Страница 142: ...ine at the top of D represents the GATE The starting point of GATE has been adjusted just beyond the noise A so that the MiniMax ignores the noise and detects on the true back wall reflection C Altern...

Страница 143: ...the and arrow keys multiple times to scroll the highlighted value 5 Press the and arrow keys multiple times to scroll the digit locations 6 Repeat steps 4 5 until the GATE value is correctly displaye...

Страница 144: ...correctly displayed 8 Press the key to set the Gate value and return to the menu screen or to cancel entering the Gate value 9 Finally press the key to return to the measurement screen and begin takin...

Страница 145: ...ly press the key to display the Digits Edit Box 4 Press the and arrow keys multiple times to scroll the highlighted value 5 Press the and arrow keys multiple times to scroll the digit locations 6 Repe...

Страница 146: ...ultiple times to scroll the value When the correct threshold is being displayed proceed to step 8 4 Alternatively press the key to display the Digits Edit Box 5 Press the and arrow keys multiple times...

Страница 147: ...k Jump to another cycle later in time with greater amplitude Often times transducers have a very slow ramp up time until reaching maximum energy In other words the amplitude of the first cycle is lowe...

Страница 148: ...you re able to notice the peak jump during the process of loading increasing the gain or lowering the threshold will generally correct the error However if it goes unnoticed all your measurements wil...

Страница 149: ...ed value 5 Press the and arrow keys multiple times to scroll the digit locations 6 Repeat steps 4 5 until the DELAY value is correctly displayed 7 Press the key to return to the measurement screen or...

Страница 150: ...timization The Auto Set uses a variety of algorithms evaluating the positive and negative and negative cycles and selects the best phase polarity to use for measurement It also optimizes the gain sets...

Страница 151: ...eps 3 4 until the ALEN value is correctly displayed 6 Press the key to return to the measurement screen or to cancel entering the ALEN The user can also access and set the approximate length from the...

Страница 152: ...lighted value 5 Press the and arrow keys multiple times to scroll the digit locations 6 Repeat steps 4 5 until the Approx Len value is correctly displayed 7 Press the key to set the Approx Len and ret...

Страница 153: ...counter clockwise applying a small amount of pressure to eliminate any excess couplant between the transducer and bolt surface Be sure to always place the transducer in the same location This will he...

Страница 154: ...uring the initial length measurement Rotate the transducer clockwise and counter clockwise making small movements of the transducer position until the active wave matches the symmetry of original wave...

Страница 155: ...d arrow keys multiple times to scroll through the sub menu items until CONTRAST is highlighted 3 Press the and arrow keys multiple times to scroll the CONTRAST value 4 Finally press the key to return...

Страница 156: ...rrow keys multiple times to scroll the BACKLIGHT options 4 Finally press the key to return to the measurement screen and begin taking readings 13 4 Graphics Options look feel The MiniMax has a few gra...

Страница 157: ...MiniMax Bolt Tension Monitor 151 Filled Draws a filled version of the waveform Detect Mark The detect mark is another look and feel option for displaying the detection indicator...

Страница 158: ...There are three pulse width options SPIKE THIN and WIDE with adjustable pulser voltages of 100 150 and 200 volts Longer bolts with attenuative material may be optimized best using the 200 volt settin...

Страница 159: ...the Pulse options 4 Once the Pulse is displayed press the key to return to the measurement screen 13 6 Pulser Voltage The MiniMax has a 200 volt square wave pulser that can be adjusted for specific bo...

Страница 160: ...rrow keys multiple times to scroll the Pulser Voltage options 4 Once the desired Pulser Voltage is displayed press the key to return to the measurement screen 13 7 Damping The MiniMax has a built in d...

Страница 161: ...8 Digitizer The digitizer feature provides additional stability to the measurement by increasing the number of samples This can be beneficial when measuring shorter length fasteners with units set to...

Страница 162: ...ER options 4 Once the desired DIGITIZER setting is displayed press the key to return to the measurement screen 13 9 Polarity Refer to section 12 7 interpreting the Waveform for a detailed explanation...

Страница 163: ...ple times to scroll through the sub menu items until POLARITY is highlighted 3 Use the and arrow keys multiple times to toggle the POLARITY negative or positive 4 Press the key to return to the measur...

Страница 164: ...Toggle Alarm on off 1 Press the key once to activate the menu items tab Press the key multiple times to tab right and the key multiple times to tab left until the UTIL menu is highlighted and displayi...

Страница 165: ...s Edit Box 3 Press the and arrow keys multiple times to scroll the highlighted value 4 Press the and arrow keys multiple times to scroll the digit locations 5 Repeat steps 3 4 until the ALARM LOW valu...

Страница 166: ...le times to tab left until the UTIL menu is highlighted and displaying the submenu items 2 Use the and arrow keys multiple times to scroll through the sub menu items until KEY CLICK is highlighted 3 U...

Страница 167: ...the and arrow keys multiple times to scroll through the sub menu items until SET DATE is highlighted 3 Press the key to display the Digits Edit Box 4 Press the and arrow keys multiple times to scroll...

Страница 168: ...to your desktop and copied into the MiniMax file folder the procedure to upgrade is outlined below Note The firmware file extension is bch and there can only be one bch file in the MiniMax folder Sim...

Страница 169: ...displayed on the screen and save it to a file Each snapshot can be individually named and stored as a tif tagged image file This can be opened using any graphics viewer With the storage capacity of t...

Страница 170: ...en 5 To capture a file press the key to display the list box 6 Use the and arrow keys to scroll through the list items until CAPTURE TO FILE is highlighted 7 Press the key to activate the Alpha Edit B...

Страница 171: ...considering there is a 4 GB internal SD card on the board Each measurement stored can be considered a page of data as it stores the measurement snapshot of the waveform and all the settings of the Min...

Страница 172: ...he key multiple times to tab right and the key multiple times to tab left until the DATA menu is highlighted and displaying the submenu items 2 Use the and arrow keys multiple times to scroll through...

Страница 173: ...t a character and advance to the next field Note Use the key to backspace if necessary 8 Repeat steps 6 7 until the NAME NOTE NUM BOLTS NUM READS START BOLT or INCR DIR is completed 9 Press the key to...

Страница 174: ...rocedures outline this process Storing a Reading Note Once the group has been created it will automatically be displayed as a grid following the create confirmation screen It is located at the bottom...

Страница 175: ...The Group Log can be hidden at any time by pressing the key However in order to display it again the hot menu item LOG must be highlighted When LOG is highlighted press the key to display the group No...

Страница 176: ...ice as the cursor is moved to a different cell the display will be updated with the display view saved with the reading Readings stored in memory are indicated by displaying a MEM in the top left corn...

Страница 177: ...he key multiple times to tab left until the DATA menu is highlighted and displaying the submenu items 2 Use the and arrow keys to scroll through the sub menu items until DELETE ONE FILE is highlighted...

Страница 178: ...ight and the key multiple times to tab left until the DATA menu is highlighted and displaying the submenu items 2 Use the and arrow keys to scroll through the sub menu items until DELETE ALL DATA is h...

Страница 179: ...e times to tab right and the key multiple times to tab left until the DATA menu is highlighted and displaying the submenu items 2 Use the and arrow keys to scroll through the sub menu items until EDIT...

Страница 180: ...to highlight the appropriate alpha characters 7 Press the key to select a character and advance to the next field of the Comments 8 Use the key to backspace if necessary 9 Repeat steps 6 8 until the C...

Страница 181: ...r time The name of the currently active file is always displayed at the top of the Grid Seq Box in measurement mode refer to photo below It s not only important to recognize what file is currently act...

Страница 182: ...menu items until OPEN is highlighted 3 Press the key to display the Grid Seq List Box 4 Use the and arrow keys to scroll through the grids until the target grid is highlighted 5 Press the key to acti...

Страница 183: ...en or active file Closing an Active File 1 Press the key once to activate the menu items tab Press the key multiple times to tab right and the key multiple times to tab left until the DATA menu is hig...

Страница 184: ...needed The user can create as many setup files containing 64 setups per file as is needed 15 2 Opening a Setup Once the MiniMax has been loaded with a number of previously saved setup files for differ...

Страница 185: ...Once the MiniMax parameters and features have be adjusted for an application the user may elect to save these setting to a specific setup location for future use This can potentially save time and red...

Страница 186: ...e the menu items tab Press the key multiple times to tab right and the key multiple times to tab left until the SETUP menu is highlighted and displaying the submenu items 2 Use the and arrow keys to s...

Страница 187: ...characters the key to select characters and the key to backspace through the characters until the Name or Note fields have been edited 7 Press the key to return to the Save Setup Parameters List Box...

Страница 188: ...14 Finally press the key to return to the measurement screen Note The Name and Comments of the Setup can be edited at any time by simply repeating the Save Setup routine described above Therefore the...

Страница 189: ...e times to tab left until the SETUP menu is highlighted and displaying the submenu items 2 Use the and arrow keys to scroll through the sub menu items until DELETE is highlighted 3 Press the key to di...

Страница 190: ...only time this might possibly occur is if the setup file in the MiniMax was somehow corrupted and the user does not have access to a computer to re load the factory setups back into the MiniMax This g...

Страница 191: ...supported However be sure to update your gauge firmware often to check for language additions The steps to select a language are outlined as follows Selecting a Language 1 Press the key once to activa...

Страница 192: ...Dakota Ultrasonics 186 4 Once the desired language is displayed press the key to return to the measure screen...

Страница 193: ...niMax series gauges The MiniMax is equipped with USB acting as a Thumb Drive external storage device when connected to a computer and powered on Therefore the SD memory card can be opened as a drive w...

Страница 194: ...ighted and displaying the submenu items 2 Press the key to display the upgrade confirmation screen followed by pressing key to start the upgrade process Note The MiniMax will power down during the upg...

Страница 195: ...ith respect to this product Dakota Ultrasonics specifically disclaims any implied warranties of merchantability or fitness for a particular purpose Some states or provinces do not allow limitations on...

Страница 196: ......

Страница 197: ...PC Software Firmware Note All software downloads and upgrades are available on our website at no additional charge Take advantage and stay current www dakotaultrasonics com...

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