38DLPlus使用手册.ppt.ppt

Model 38DL PLUSOperation Training,IndexClick on the links below to go directly to the corresponding slide.(Please Note:you have to be in slide show mode for the links to work.),Power Up,The On/Off key is used to turn the 38DL PLUS on and off.,Back toIndex,Model 38DL PLUSDual Element Do-ZERO,Back toIndex,Do-ZERO for Standard Dual Transducers,Press,Uncouple the transducer and make sure the tip is free of any couplant layer.,“Do-ZERO”allows the gage to recognize the transducer for optimal setup.It will also measures the time of flight through the transducer to compensate for transducer wear and changes in temperature.,Note:The 2nd F,Zero can be pressed any time the transducer is uncoupled to update the Zero offset.,Back toIndex,then,2nd F,Do-ZERO for THRU-COAT Transducers,Uncouple the transducer and make sure the tip is free of any couplant layer.,Note:The Zero can be pressed at any time the transducer is uncoupled to update the Zero offset or to turn THRU-COAT On or Off.,“Do-ZERO”allows the gage to recognize the transducer for optimal setup.It will also measures the time of flight through the transducer to compensate for transducer wear and changes in temperature.,Press:,Use,to turn THRU-COAT On or Off,Press EnterPress Enter on“OK”to complete the Do-ZERO,Back toIndex,then,2nd F,Selecting Measurement Units and Resolution,Use,to highlight the Measurement setup then press ENTER,Allows the user to set Measurement Units and Resolution,Press:,Use,to select“units”or“resolution”and,to change the setting,then press Meas,Back toIndex,Main Screen,Back toIndex,Model 38DL PLUSCalibration Standard Dual Transducers,Back toIndex,Standard Dual Element Cal Velocity,Couple transducer to the thick sample press:,Allows the user to calibrate for the speed of sound of the material to be tested.Usually done on a sample representing the maximum of the measurement range.,Uncouple the transducer and enter the known thickness,Once reading is steady press:,Back toIndex,ENTER,Standard Dual Element Cal Zero,A subtracted time measurement is used to compensate for the transit time through the delay line in the transducer and the couplant layer.Cal Zero is usually done on a sample representing the minimum of your measurement range.,Once reading is steady press:,Uncouple transducer and enter the known thickness.Then press the MEAS key to complete the calibration.,Couple transducer to the thin sample press:,Back toIndex,ENTER,Model 38DL PLUSTHRU-COAT Calibration,Back toIndex,THRU-COAT Cal Velocity,Couple transducer to the thick sample press:,Allows the user to calibrate for the speed of sound of the material to be tested.Usually done on a sample representing the maximum of the measurement range.,Uncouple the transducer and enter the known thickness,Once the reading is steady press:,Back toIndex,ENTER,THRU-COAT Cal Zero,A subtracted time measurement used to compensate for the transit time through the delay line in the transducer and the couplant layer.Cal Zero is usually done on a sample representing the minimum of your measurement range.,Once reading is steady press:,Uncouple transducer and enter the known thickness.Press the Meas key to complete the calibration or press the CAL VEL key to calibrate for the velocity of the coating.,Couple transducer to the thin sample press:,Back toIndex,ENTER,Coating Calibration,Couple transducer to a sample with known coating thickness press:,Allows the user to calibrate for the speed of sound of the of the coating material.It is not necessary to calibrate for the coating if the coating value is not being displayed or if the accuracy of the coating thickness is of less importance.,Uncouple the transducer and enter the known coating thicknessPress MEAS to complete the calibration,Once reading is steady press:,Back toIndex,ENTER,Directly enter the velocity in THRU-COAT Mode,Allows the user to directly enter the velocity of the material to be tested.When using THRU-COAT the velocity of the coating can also be entered.,The current velocity will bedisplayed.Use the arrow keysto enter the know velocity.Thenpress MEAS,Press,Press,The current coating velocity will bedisplayed.Use the arrow keysto enter the know velocity.Thenpress MEAS,again,Back toIndex,2nd F,then,2nd F,then,THRU-COAT Measurement Screen,Back toIndex,Model 38DL PLUSCalibration of Single Element Transducers,Back toIndex,Single Element Transducer/Setup Selection,The 38DL PLUS has 21 preset default single element transducer setups stored in its permanent memory and up to 35 user defined custom setups can be entered.To select a default transducer setup press,The user can select one of the default transducer setups or any of the user defined custom setups.,Back toIndex,Then use the,keys to select from the available lists and press ENTER,Then use the,keys to select a transducer setup and press the MEAS key to recall the setup and return to the measure mode.,Single Element Cal Velocity,Couple transducer to the thick sample and press:,Allows the user to calibrate for the speed of sound of the material to be tested.Usually done on a sample representing the maximum of the measurement range.,Uncouple the transducer and enter the known thickness use in the,keys,Once reading is steady press:,Back toIndex,ENTER,Single Element Cal Zero,A subtracted time measurement used to compensate for the transit time through the delay line in the transducer and the couplant layer.Cal Zero is usually done on a sample representing the minimum of your measurement range.,Once reading is steady press:,Couple transducer to the thin sample press:,Back toIndex,ENTER,Uncouple the transducer and enter the known thickness use in the,keys,Model 38DL PLUSInstrument Lock with Programmable Password,Back toIndex,Instrument Lock with Programmable Password,The instrument lock on the 38DL PLUS allows the user to lock advanced features and functions so that they are not accidently altered or changed.A password can be set so that the locked functions can not be unlocked without knowing the passwordThe following functions can be lockedCalibrationAccess to Setup Menu and SP MenuTransducer RecallDatalogger(except for the save key)The ability to adjust the gainWaveform adjustment parameters,Back toIndex,Note:If the user forgets the password please contact Olympus for the master password.,Instrument Lock,setting a Password,Press,Setting a password is an optional feature and the 38DL PLUS can be locked with out a password.,Back toIndex,Note:If the user forgets the password please contact Olympus for the master password.,Then use the,keys to select Password Set and press ENTER,Use the editing functions to enter a password and press Enter use the,keys to select set and press ENTER.,Instrument Lock with without Password,Press,If a password has been set then the password must be entered in the Instrument Lock screen before any of the functions can be used.If a password has not been set then the password area will be grayed out.,Back toIndex,Then use the,keys to selectInstrument Lock and press ENTER,Use the editing functions to enter a password and press Enter use,keys to select the a function to lock and,lock and unlock it.Highlight set and press ENTER to activate the lock,Example of a locked function,Back toIndex,Model 38DL PLUSUsing the EMAT Transducer,Back toIndex,EMAT Transducer,An EMAT(Electro Magnetic Acoustic Transducer)uses the Magnetostrictive principle to generate shear wave sound energy in ferrous metals that are externally coated with high temperature oxide scale.The EMAT transducer does not require the use of ultrasonic couplant.If the scale is not fully bonded to the surface of the steel,the shear wave sound energy will not be transmitted into the metal.,Back toIndex,EMAT Transducer,EMAT transducers are designed to be a quick way of determining the approximate wall thickness without removing the external oxide scale.The E110-SB EMAT transducers generate shear sound waves in the steel material.The EMAT transducers create a non-focused signal and is designed to give a good estimate of the remaining wall thickness(+/-0.010 in or+/-0.25 mm)EMAT transducers are relatively insensitive to small internal pits.The minimum capability is approximately 0.080 in.(2.0mm),Back toIndex,Connecting the E110-SB EMAT Transducer,E110-SB,LCB-74-4,38DL PLUS,The 1/2XA/E110 filter adapter must be plugged in to the transducer connectors located at the top of the 38DL PLUS.The E110-SB can then be connected to the 1/2XA/E110 adapter box using a standard Lemo to BNC cable.(LCB-74-4),The 38DL PLUS will automatically recall the default setup for the E110-SB(EMAT)transducer when the Adapter and E110-SB is plugged in.The gage is now ready to take thickness measurements of steel that is coated with external scale using the default setup.,Back toIndex,EMAT Transducer Calibration,For best accuracy it is recommended that the 38DL PLUS be calibrated using samples with external scale and known wall thickness.Perform the same Cal Vel and Cal Zero procedure that is outlined for any single element transducer.,Back toIndex,Using Gain with the EMAT Transducer,When using the EMAT transducer it will often be necessary to adjust the gain level in order to make proper echo detection.This is due to the variation in signal amplitude caused by changes in the external oxide thickness and surface conditions.,Gain too low echo not detected,Gain set properly set for echo detection,Press,Back toIndex,then Use the,keys to adjust the Gain Value,Waveform Controls,A-Scan Range AdjustDelay AdjustEcho Detection for Dual Transducers Freeze Mode,Zoom ModeDisplay Brightness AdjustManual Gain Adjust for Dual Transducers Extended Blank for Dual Transducers,Back toIndex,A-Scan Range Adjust,Press,Allows the operator to cycle through the fixed ranges of the waveform display.The range should be set so that the echo from your thickest material will be on screen.,Successive presses of the RANGE key toggles through the different ranges.,Back toIndex,Delay Adjust,Press,then,The delay function is used to adjust the beginning(left side)of the waveform.The user can delay a portion of the signal off screen so they can view the important part of the waveform in greater detail.,Delay,Back toIndex,2nd F,Then use the,To adjustthe waveform delay,Echo Detection with Dual Element Transducers,Echoes must be greater in amplitude than 20%of screen height in order to be detected.,20%,Echo not detected,Echo detected,20%,Back toIndex,Freeze Mode,Press:,Freeze allows the user to freeze both the waveform and thickness display,once the FREEZE key is pressed.The display can be reset by pressing the FREEZE key again or by pressing the SAVE or MEAS keys.,Press FREEZE again to return to a live measurement display.,Back toIndex,Press,Zoom centers the measured echo on the waveform display.The Zoom will automatically track the measured echo and assure that it remains in the center 60%of the screen.,Press ZOOM again to return to the previously set range.,Zoomed Waveform,Back toIndex,Un-Zoomed Waveform,Zoom,Single and Dual Element,Mode 1,Zoom will adjust the range and delay so the interface echo is placed at 10%screen width.The user can adjust the range and the gage will maintain the position of the interface echo.,Zoomed Waveform,Un-Zoomed Waveform,Press ZOOM again to return to the previously set range,Back toIndex,Press,Zoom,Single Element,Mode 2,Zoomed Waveform,Un-Zoomed Waveform,Press ZOOM again to return to the previously set range,Zoom will adjust the range and delay so the interface echo is placed at 10%screen width.The user can adjust the range and the gage will maintain the position of the interface echo.,Back toIndex,Press,Zoom,Single Element,Mode 3,Display Brightness Adjust,Press,Allows the user to adjust the contrast of the display for optimum viewing in any lighting condition.,Back toIndex,DISPLAY,Then use,To select between 0,25,50,75 and 100%,Use,to highlightDisplay Brightness,Manual Gain Adjust Dual Element Transducers,Press,Allows the operator to adjust the receiver Gain in 1 dB increments.Once an echo is above the 20%detection point,adjusting gain will not effect the calibrated accuracy.,Pressing the GAIN key twice prior to adjusting the gain will recall the last set gain value.,Back toIndex,Then use,adjust,Extended Blank for Dual Element Transducers,Press,Allows the operator to extend a blank from the sound entry point to the max of the displayed range.,To select EXT BLANK,Back toIndex,Extended Blank,Then use,to adjust,Then use,Extended Blank,Gage reading noise signal above detection point.,Extended Blank set correctly.Gage making proper back wall detection.,NOISEDETECTED,PROPERDETECTION,Back toIndex,Extended Blank,Model 38DL PLUSEcho-to-Echo Mode,Back toIndex,Echo-to-Echo with Dual Element Transducers,Press,then,The Echo-to-Echo function allows the 38DLPlus to make thickness readings between multiple backwall echoes.This function can be used to measure the true metal thickness on most painted and coated materials.,Use the,keys to select the measurement mode and press ENTER,Back toIndex,2nd F,Auto Echo-to-Echo,Dual Element Transducers,The 38DLPlus will automatically make thickness measurements between the highest amplitude backwall signal and the second highest amplitude backwall signal.The normal 20%echo detection rules do not apply to Automatic Echo-to-Echo measurement mode.,Note:The standard detection marker is replaced with a bracket drawn between the two measured echoes.,AEtoE:Auto Echo-to-EchoMEtoE:Manual Echo-to-Echo,Echo-to-Echomarker,Back toIndex,Press the WAVE ADJ key then use the,keys to select between Gain,Extended Blank and E1 Blank Use,to adjust the parameter,Manual Echo-to-Echo,Dual Element Transducers,The user controls signal detection by adjusting the receiver gain and two blanking gates.The gage will automatically detect the highest amplitude echo and the next signal.,E1 Blank,ExtendedBlank,Back toIndex,Echo-to-Echo Measurement Tips,Backwall 1,Shear wave Echo,Backwall 2,Improper detection usingManual Echo-to-Echo,Proper detection using Blank adjustment,Back toIndex,E1 Blank,E1 Blank,Note:Shear wave echoes can cause Echo-to-Echo measurement problems with the D790 in the thickness range of.600”-1.00”.We recommend using the D797 for the thicker Echo-to-Echo measurements or D7906 in Echo-to-Echo or in THRU-COAT mode.The delay material of the D7906 reduces shear wave echo propagation,D7906 in THRU-COAT or Echo-to-Echo Mode,Back toIndex,D7906 in Thru-Coat mode on a 1.00 test block,D7906 in Echo-to-Echo mode on a 1.00 test block,Echo-to-Echo,No Multiples,No reading with Echo-to-Echo on aheavily corroded sample,Thru-Coat on a heavily corroded sample,Back toIndex,Model 38DL PLUSTemperature Compensation Feature,Temperature Compensation Feature,The sound velocity in steel changes approximately 1%per 1000F(550C)change in temperature as recommended by ASME Standard E 797-95.,Compensated Thickness=Time of Flight*V0(1+k(T1-T0)2,V0=Velocity at CalibrationT0=Temperature at Calibrati