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Panametrics MG2 Скачать руководство пользователя страница 120

910-257B

October 2005

Page 8-4

MG2 Series

3.

Sound Attenuation

Sound attenuation or absorption in many organic materials, such
as low density plastics and rubber, occurs when sound is
attenuated very rapidly at the frequencies used in normal
ultrasonic thickness gauging. Therefore, the maximum thickness
that can be measured in these materials is often limited.

8.2

Transducer Selection

For any ultrasonic measurement system (transducer plus thickness
gage) there will be a minimum material thickness below which valid
measurements will not be possible.

Normally this minimum range will be specified in the manufacturer's
literature. As transducer frequency increases, the minimum
measurable thickness decreases. In corrosion applications, where
minimum remaining wall thickness is normally the parameter to be
measured, it is particularly important to be aware of the specified
range of the transducer being used. If a dual is used to measure a test
piece that is below its designed minimum range, the gage may detect
invalid echoes and display an incorrectly high thickness reading. The
table below lists approximate minimum measurable thicknesses in
steel for the standard transducers used with the Panametrics-NDT

TM

MG2 gage. Note that these numbers are approximate. The exact
measurable minimum in a given application depends on material
velocity, surface condition, temperature and geometry, and it should
be determined experimentally by the user.

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Содержание MG2

Страница 1: ...USER S MANUAL MG2 MG2 XT MG2 DL Ultrasonic Thickness Gages Part No 910 257C...

Страница 2: ...y Olympus NDT All rights reserved No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or by any information st...

Страница 3: ...ration 3 3 3 4 Material Velocity Calibration 3 4 3 4 1 Material Sound Velocity Unknown 3 4 3 4 2 Material Sound Velocity Known 3 6 3 5 Zero Calibration 3 7 3 6 THRU COAT Calibration MG2 XT and DL 3 8...

Страница 4: ...16 4 8 Diff Mode 4 17 4 9 Clock Setup 4 18 4 10 Resets 4 19 4 10 1 Measurement Reset 4 19 4 10 2 Master Reset 4 21 4 10 3 Database Reset 4 22 4 11 Activating Waveform Option 4 22 4 12 Optional Wavefor...

Страница 5: ...Creating Data Files 5 4 5 3 1 Standard Editing Commands 5 4 5 3 2 Creating Files From a Computer 5 6 5 3 3 Creating Files From the MG2 DL 5 6 5 4 Opening a File 5 15 5 5 Saving Data 5 16 5 6 Using the...

Страница 6: ...ature Measurements 8 6 9 Maintenance and Troubleshooting 9 1 9 1 Routine Care and Maintenance 9 1 9 2 Transducers 9 1 9 3 Error Messages 9 2 9 4 Turn On and Low Battery Problems 9 2 9 5 Measurement Pr...

Страница 7: ...ms and provide replacement equipment if necessary Warranty Olympus NDT guarantees MG2 Series Ultrasonic Gages to be free from defects in materials and workmanship for a period of two years twenty four...

Страница 8: ...ustomer will pay shipping expenses both ways Olympus NDT offers an optional third year warranty coverage at an additional cost under the same terms at the time of purchase Olympus NDT reserves the rig...

Страница 9: ...001 01mm or 01 1mm easy calibration for unknown material velocity and or transducer zero and automatic power off MG2 XT Features include Automatic probe recognition quick compensations for transducer...

Страница 10: ...user set nominal reference value THRU COAT that displays the thickness of the coating and the true metal thickness using a single backwall echo Echo to Echo that displays the true metal thickness and...

Страница 11: ...easurement Rate of 20 per second Fast Minimum Mode Freeze Mode Zero Compensation Mode Display Hold Blank Inches millimeter Mode Low Battery Indicator 150 Hour Battery Operating Time Battery Saver Two...

Страница 12: ...s and between 20 C and 500 C in temperature The MG2 series makes full use of its microprocessor to offer selectable advanced measurement features Moreover the MG2 Series continuously adjusts the recei...

Страница 13: ...ility range sensitivity and accuracy The MG2 DL built in datalogger allows a simple method for recording thickness readings and for labeling each point with an identification code and can store up to...

Страница 14: ...910 257C March 2006 Page 1 6 MG2 Series...

Страница 15: ...ator becomes familiar with the advanced features of the gage Note The default value for sound velocity is only an approximation of the sound velocity in the test block material The sound velocity of l...

Страница 16: ...p end of the MG2 case Note When unplugging a transducer pull ONLY on the molded plug NOT on the cable Step 2 Press the ON OFF key to turn the gage on The transducer should NOT be coupled to the test p...

Страница 17: ...ep 5 You are now ready to make measurements The current units are indicated on the right of the display Inches IN or millimeters MM may be changed to the alternate measurement units by pressing 2ndF S...

Страница 18: ...ep 2 Press the tip of the transducer to the surface of the material to be measured Use moderate to firm pressure and keep the transducer as flat as possible on the material surface Step 3 Read the mat...

Страница 19: ...ucer is changed and whenever the transducer temperature changes significantly 2 Material Velocity Calibration or CAL VEL Done using a thick test block of the measured material with known thickness or...

Страница 20: ...o and the ZERO flag are displayed do ZERO Figure 3 1 Do Screen To do the Transducer Zero Compensation wipe any couplant from the transducer face and press 2nd F Cal Zero Do Zero The gage will momentar...

Страница 21: ...Cal Zero Do Zero Step 2 Couple the transducer to the thick calibration block Step 3 Press CAL VEL Step 4 When the thickness reading is stable press the ENTER key Step 5 Uncouple the transducer from th...

Страница 22: ...the 2nd or 3rd multiple echo Do not attempt to do a Velocity and Zero calibration under this condition Doing so will cause an error Instead correct the cause of the doubling Either the calibration blo...

Страница 23: ...of all couplant and pressing 2ndF Cal Zero Do Zero Step 2 Couple the transducer to the block Step 3 Press the CAL VEL key Step 4 When the thickness reading is stable press the ENTER key Step 5 Uncoup...

Страница 24: ...Sound velocity in all materials changes with tempera ture For maximum accuracy the calibration block should be at approximately the same temperature as the samples to be measured 3 4 2 When Material S...

Страница 25: ...acy of measurements but simulating actual surface conditions on the calibration block can help to improve results The exact thickness of the sample must be known Step 1 First update the Transducer Zer...

Страница 26: ...is a special feature that measures the true metal thickness of coated or paint materials This feature only requires a single backwall echo and is recommended for applications with heavy corrosion whe...

Страница 27: ...calibration follow these steps Step 1 Couple the transducer to a thick calibration block Press CAL VEL while in the THRU COAT Measurement mode Step 2 Press ENTER when the reading is stable Step 3 Unc...

Страница 28: ...ion block Press CAL VEL while in the THRU COAT Measurement mode Step 2 Press ENTER when the reading is stable Step 3 Uncouple the transducer from the material and enter the thickness of the block usin...

Страница 29: ...Echo to Echo feature or it may be necessary to remove the coating 3 7 Echo to Echo Calibration The Echo to Echo measurement feature allows the MG2 XT and MG2 DL to measure remaining wall thickness of...

Страница 30: ...ndard that does not exceed a thickness of 0 500 12 5mm and is thicker than 0 100 2 5mm and press CAL VEL Step 3 When the reading is stabilized press ENTER Step 4 Uncouple the transducer from the mater...

Страница 31: ...March 2006 910 257C MG2 Series Page 3 13 within the thickness range of 0 100 0 500 2 5 mm 12 5 mm...

Страница 32: ...910 257C March 2006 Page 3 14 MG2 Series...

Страница 33: ...ration However they make the gages more versatile instruments The following additional features may be accessed directly from the keypad Additional features may be accessed in the setup mode To access...

Страница 34: ...isibility in normal to high ambient light conditions to be viewed in low to zero ambient light conditions To switch backlight On Off MG2 and MG2 XT Press the Light Bulb key MG2 DL Press 2nd F Freeze L...

Страница 35: ...b Step 3 Use the key to highlight Backlight Mode Step 4 Use the and keys to change between Normal and Auto Step 5 Press MEAS to return to the measure mode with the new settings To adjust Contrast The...

Страница 36: ...a situation when the user wishes to hold a displayed thickness reading This is helpful for high temperature thickness measurement applications to limit the transducer contact time The freeze can also...

Страница 37: ...d detection threshold to prevent any transducer related or material related noise from being seen as a thickness echo This works well in most corroded material gaging applications However in certain s...

Страница 38: ...thickness It is best to guess low if you are uncertain Step 3 Couple the transducer to the material sample and press MEAS Optimization will be performed and the gage will return to the Measure Mode Th...

Страница 39: ...which the material is not coated or painted If this Measure Mode is used on painted material the thickness of the paint will be added to the thickness reading Auto Echo to Echo Mode makes thickness m...

Страница 40: ...tup tabs Step 2 Use the to highlight the MEAS tab Step 3 Use the key to highlight Meas Option and to select Standard Auto Echo to Echo or Manual Echo to Echo Waveform Mode only Step 4 Press MEAS to re...

Страница 41: ...ut the gage in Min or Max scanning mode This feature allows the user to scan over an area and quickly determine the minimum or maximum thickness Min Mode displays live thickness values and recalls the...

Страница 42: ...keys to highlight the MEAS tab Step 3 Use the key to highlight Min Max and the keys to select among Off Min or Max Step 4 Press MEAS to return to the Measure Mode 4 5 5 Hold Blank Hold Blank controls...

Страница 43: ...e allows the user to display the measurement update rate The user can select between Normal 4 Hz and Fast 20 Hz Note Changing to the fast update rate will greatly affect the battery life of the MG2 Se...

Страница 44: ...the MEAS tab Step 3 Use the key to highlight CAL Lock and to select between Off and On Step 4 Press MEAS to return to the Measure Mode 4 5 8 ID Overwrite MG2 DL Only ID Overwrite allows the user to lo...

Страница 45: ...ix Backlight Mode 36DL PLUS Output 4 6 1 Beeper Beeper allows the user to turn the audio beeper of the MG2 Series gages on and off The Beeper is set to On by default and will generate an audio beep wh...

Страница 46: ...mains powered up until the user turns the unit Off or the battery voltage becomes low To change Inactive Time Step 1 Press 2ndF Setup to display the setup tabs Step 2 Use the keys to highlight the Sys...

Страница 47: ...has been turned on When Backlight Mode is set to Normal the backlight will stay on until it is turned off When Backlight Mode is set to Auto and the backlight is turned on it will stay on while a thi...

Страница 48: ...the keys to highlight the System tab Step 3 Use the key to highlight 36DLP Output and to select between On and Off Step 4 Press MEAS to return to the Measure Mode 4 7 High Low Alarms MG2 XT and MG2 DL...

Страница 49: ...to highlight Enable and to select On or Off Step 4 Press the key to highlight Lo Alarm and then press key and use the and keys to edit the low alarm set point Step 5 Press the ENTER key to highlight...

Страница 50: ...the key to highlight Enable and to select On or Off Step 4 Press the ENTER key and then use the key to highlight Diff Value Use the and keys to slew to the Diff set point Step 5 Press MEAS to return t...

Страница 51: ...key to highlight Day and use the keys to set the day Step 8 Press the key to highlight Set Cancel and use the keys to select Set or Cancel Step 9 Press Enter when Set is highlighted to set the clock a...

Страница 52: ...Unit Inches Resolution Standard Min Max Off Hold Blank Blank Measure Rate Normal CAL Lock Off ID Overwrite Off MG2 DL only Beeper On Inactive Time On Radix Period Backlight Mode Normal 36DLP Output Of...

Страница 53: ...nt to it s default values and also deletes the database on the MG2 DL Note Caution should be used when performing a Master Reset because it will cause the gage to delete all stored thickness readings...

Страница 54: ...reset has been per formed the thickness data cannot be retrieved To perform Database Resets Step 1 Press 2ndF Setup to display the setup tabs Step 2 Use the keys to highlight the Reset tab Step 3 Use...

Страница 55: ...standard Thickness Mode If the Live Waveform Option has been purchased then the optional software will already have been loaded and activated When this feature is activated a Waveform tab appears in t...

Страница 56: ...Press ENTER to accept Step 7 Power the unit Off then On again to complete the Live Waveform activation 4 12 Optional Waveform MG2 XT and MG2 DL Only The Live Waveform option for MG2 XT and MG2 DL Ser...

Страница 57: ...te that the MG2 DL can save approximately 8000 thickness readings or 350 waveforms with thickness Rectification Allows the user to select the rectification of the displayed waveform Selections are Ful...

Страница 58: ...e keys to select the Waveform tab Step 3 Press or to scroll to Enable Step 4 Press to choose On or Off Step 5 Press or ENTER to scroll to Zoom Step 6 Press to choose On or Off Step 7 Press or ENTER to...

Страница 59: ...or key to change the range to the next higher or lower range set point or the keys to increase or decrease the waveform delay 4 13 Waveform Adjust Mode MG2 XT and MG2 DL Only The Waveform Adjust Mode...

Страница 60: ...4 Press 2nd F Gain while viewing the Gain parameter to set the Gain back to its default value Step 5 Press MEAS to exit the Waveform Adjust Mode with the parameters at their adjusted values 4 13 1 Man...

Страница 61: ...and DSP and are amplitude independent Echo Below the 20 Screen Gradicule Echo Detection Echo Above the 20 Gradicule Note Normally when the gain is set to its default value the waveform is ADC d Autom...

Страница 62: ...Blank allows the operator to extend a blank from the sound entry point to the maximum of the displayed range When the extended blank is set the gage measures to the first valid echo after the end of...

Страница 63: ...cho1 Blank The E1 blank adjustment is only selectable when the gage measurement type is set to Manual Echo to Echo This Blank is used to block out the trailing edge of the first detected backwall echo...

Страница 64: ...Echo to Echo Step 1 Press 2nd F SETUP to enter the Setup Menu Step 2 Use the keys to select the MEAS tab Step 3 Use the key to select MEAS OPTION Step 4 Use the keys to select MAN E to E Step 5 Press...

Страница 65: ...Backwall Echo E1 Echo1 Blank Set Properly Gage Making Proper Detection Between Successive Backwall Echoes 4 13 4 Range Range Adjust allows the user to adjust the range of the waveform so that the mea...

Страница 66: ...e range to the next higher lower range The available ranges on the MG2 XT and MG2 DL Series gages are fixed based on the transducer being used Waveform Showing 5 00 Range Press to Change Range to 1 00...

Страница 67: ...measured echoes appear on screen Delay Adjust is not available if the waveform Zoom Options is turned on To adjusting the range when in Live Waveform Mode press the keys to increase or decrease the Wa...

Страница 68: ...tion is used to scan over an area and look at how the cross sectional thickness is changing The B scan DB Grid and Optional Waveform are mutually exclusive features Only one of these functions can be...

Страница 69: ...h data is updated or drawn on the screen Choose the B Scan direction based on the direction of transducer movement Left to right Causes the data to start at the right of the screen and scroll to the l...

Страница 70: ...l stop the B scan at its current position when the FREEZE key is pressed Max Thickness Allows the user to set the thickness range for the B scan image This should be set slightly larger than the maxim...

Страница 71: ...wing events occurs The gage encounters a LOS condition Loss of Signal no thickness value When an LOS occurs the B scan stops updating and will start up again if a new thickness reading is acquired A v...

Страница 72: ...o indicate the location of the displayed thickness This is either the Minimum or Current thickness location of the B scan depending on the Freeze option selected The unit displays the thickness and th...

Страница 73: ...ckness value is saved with the B scan image This value can be the current thickness minimum thickness or the thickness at the Review Marker on a frozen B scan The Datalogger can store a maximum of 350...

Страница 74: ...Expanded Liner format 2D Grid files display the rows and columns of the grid file This allows the user to easily see the thickness data being saved to the grid file at the current position Incremental...

Страница 75: ...omatically incrementing to the next ID location the user may press the ID key and use the arrow keys to move to any row or column in the grid file The following are definitions of the available DB Gri...

Страница 76: ...e the Key to enter the DB GRID Setup menu Step 4 Use the and to select a parameter and the and to adjust the setting Step 5 Press the MEAS key to return to the Measure mode and save the adjusted setti...

Страница 77: ...hile DB Grid Is Active Step 1 From Measure mode press the 2nd F ID key The gage displays the ID REVIEW screen Step 2 Use to move to a new grid or ID location For incremental or sequential files only t...

Страница 78: ...rectly to Any ID Location in the Active File Step 1 From Measure mode press the 2nd F ID key The gage displays the ID REVIEW screen Step 2 Press the 2nd F ID again to enter the ID EDIT screen A cursor...

Страница 79: ...ditional ID s stored at the current Row and Column locations Inserted points in incremental or sequential files are shown as added ID s in the current file list To view the inserted or appended ID loc...

Страница 80: ...910 257C March 2006 Page 4 48 MG2 Series...

Страница 81: ...ode Using ID Edit Mode Deleting a File Receiving Files and Using the GageView Interface Program Statistics Reports 5 1 Datalogger Overview The MG2 DL datalogger has a built in file and data management...

Страница 82: ...description of the measurement conditions The additional data stored with each thickness value includes File Name Identifier Units in or mm LOS Loss of Signal Differential Mode Differential Reference...

Страница 83: ...is loaded into a computer and later recalled back to the gage each measurement is always uniquely identified by the file name and ID number where it was initially stored 5 2 1 File Name Structure File...

Страница 84: ...re are references to the use of the MG2 DL Standard Editing Commands These commands are described in the section below 5 3 1 Standard Editing Commands To enter a character or a symbol at any character...

Страница 85: ...March 2006 910 257C MG2 Series Page 5 5 After selecting an alpha character press or to move the cursor position to another character Figure 5 1 Organization of Character Cycle...

Страница 86: ...space 5 3 2 Create Files From a Computer Using GageView See the GageView Interface Program Instruction Manual 5 3 3 Create Files from the MG2 DL To create files from the MG2 DL follow these steps Step...

Страница 87: ...or if the character to the left is a punctuation mark then the ID number cannot increment If an ID number cannot increment after a reading is saved a long error beep sounds and the momentary message C...

Страница 88: ...G2 Series 2 Initial Limit ABC ABD ABE ABZ ACA ACB ZZZ 3 Initial Limit ABC 12 34 ABC 12 35 ABC 12 36 ABC 12 99 4 Initial Limit 001 002 003 009 010 999 Table 5 1 Five Examples of Automatically Generated...

Страница 89: ...March 2006 910 257C MG2 Series Page 5 9 5 Initial Limit 1A 1B 1C 1Z 2A 2B 9Z Table 5 1 Five Examples of Automatically Generated Incremented ID Number Series...

Страница 90: ...ss ENTER Step 5 Use the and keys to select Normal or THRU COAT and press ENTER Normal is for standard files THRU COAT is used when storing thru coat thickness readings Step 6 Use the and keys to selec...

Страница 91: ...3 ABC124 ABC125 ABC135 Example Start ID XY GY End ID XY IB The resulting file would contain the following list of ID numbers XY GY XY GZ XY HA XY IB To create a Sequential File follow these steps Step...

Страница 92: ...se the key to enter the End ID using the editing function Press ENTER Step 9 Use the and keys to select Done or Cancel Press ENTER 5 3 3 3 2 D Grid File A 2 D grid is a sequence of ID numbers arranged...

Страница 93: ...s Page 5 13 continues until the ID number that refers to the last column and last row is reached Note Either the columns or the rows can be selected to incre ment first Refer to the following figure F...

Страница 94: ...is made for each part To create a 2 D Grid file follow these steps Step 1 Press 2nd F File to display the File Tabs Step 2 Use the and keys to select the Create Tab Step 3 Use the key to highlight the...

Страница 95: ...mode the columns after Z will increment AA BB CC Step 12 Use the and keys to select to increment first by Row or Column Press ENTER Step 13 Use the and keys to select Done or Cancel Press ENTER 5 4 O...

Страница 96: ...reading unless ID Overwrite Protection is enabled in Meas Setup Ifyou donot want to save a measurement at a specific ID press SAVE while no measurement is taken The gage will store an LOS condition a...

Страница 97: ...an ID location For this reason the gage has two file types for saving data Normal Standard one thickness saved THRU COAT Thickness of coating and thickness of steel saved The gage will not store diff...

Страница 98: ...ong to locate the desired ID by pressing and To change the current ID Location to a new ID which does not yet exist in the database This mode is useful when you want to include additional measurement...

Страница 99: ...8 1 Delete a Range of ID s in a File Note When deleting a range of ID s in an incremental file both the ID and the stored value will be deleted Note When deleting a range of ID s in a sequential or 2...

Страница 100: ...o edit the Start ID using the editing function keys Press ENTER Step 7 Press to edit the End ID number using the editing function keys Press ENTER Step 8 Use or to choose Delete or Cancel Press ENTER...

Страница 101: ...the Delete tab Step 4 Press or to select Delete File Press ENTER Step 5 Press or to highlight the file Step 6 Press ENTER to select the file for deletion Step 7 Use or to choose Delete or Cancel Step...

Страница 102: ...with new data or a LOS value You may enable ID Overwrite and the gage will display a message that states whether data already exists at an ID location To enable ID Overwrite Step 1 Press 2nd F SETUP t...

Страница 103: ...gage This has two benefits 1 Thickness survey data previously saved with ID s and stored in a computer file may be retrieved to the gage at a later date to guide you through the measurement sequence u...

Страница 104: ...ce program for the MG2 DL GageView is a Windows based program compatible with Windows 2000 and XP It can create inspection database files load data files and generate reports GageView is compatible wi...

Страница 105: ...25 Step 4 Press or to select Report on File Press ENTER Step 5 Use and to scroll to files Step 6 Press ENTER to select the file Step 7 Use or to choose Report or Cancel Step 8 Press ENTER Step 9 Pres...

Страница 106: ...File tabs Step 2 Press to scroll to the Stats tab Step 3 Press to enter the Stats tab Step 4 From Report On press or to select Report on ID Range Press ENTER Step 5 Use to edit Start ID using the edi...

Страница 107: ...March 2006 910 257C MG2 Series Page 5 27...

Страница 108: ...910 257C March 2006 Page 5 28 MG2 Series...

Страница 109: ...s 0 01 0 1 Inches 0 001 0 01 MEASUREMENT RATE Standard Mode 4 measurements per second Fast Min Mode 20 measurements per second MATERIAL VELOCITY RANGE 0 0200 0 7362 in S 0 508 18 699 mm S TRANSDUCER Z...

Страница 110: ...ax Flags M m _ 4 Diff Alarm Flags D A H L _ B C 5 Gain Flag GL GH GO _ 6 Measure Mode Flags STD THRU AEtoE 7 Measure Rate Normal Fast 8 Stored Thickness C 9 Units IN MM 10 LOS Flag LOS _ 11 Help Text...

Страница 111: ...ing thickness using a single backwall echo with D7906 SM and D7908 transducers Thru Paint Echo to Echo Time interval between two successive backwall echoes for elimination of paint and coating METRIC...

Страница 112: ...705 MG2 XT and MG2 DL models use the transducers listed above and D7906 SM and D7908 DATALOGGER MG2 DL only STORAGE CAPACITY 8000 thickness measurements or 350 waveforms with thickness with the Wavfor...

Страница 113: ...CATION NUMBERS 10 alphanumeric characters character set A Z 0 9 and the special characters FILE FORMATS Incremental sequential 2 dimension grid DATALOGGER FEATURES Save Reading at ID Review Stored Con...

Страница 114: ...910 257C March 2006 Page 6 6 MG2 Series...

Страница 115: ...side of the transducer where they are converted back into electrical signals The gage precisely measures the time interval between the excitation pulse and the first echo signal and subtracts a zero o...

Страница 116: ...910 257C March 2006 Page 7 2 MG2 Series...

Страница 117: ...f the pits to the inside wall The conventional technique is to measure unpitted metal thickness ultrasonically measure pit depth mechanically and subtract the pit depth from the measured wall thicknes...

Страница 118: ...f the transducer and instrument being used Generally an inability to obtain a valid thickness reading at a particular point on a test specimen could be a sign of a seriously degraded wall which may wa...

Страница 119: ...red from individual crystallites in the casting or from dissimilar materials within the composite This effect reduces the ability to discriminate a valid return echo from the back side of the material...

Страница 120: ...terature As transducer frequency increases the minimum measurable thickness decreases In corrosion applications where minimum remaining wall thickness is normally the parameter to be measured it is pa...

Страница 121: ...0 5 25 mm 32 122 F 0 50 C D794 D795 5 0 Straight Rt Angle 0 283 7 2 mm 0 030 2 0 75 50 mm 32 122 F 0 50 C D797 D797 SM 2 0 Rt Angle Straight 0 900 22 9 mm 0 150 25 3 8 635 mm 5 752 F 20 400 C D7226 D...

Страница 122: ...easurements Corrosion measurements at elevated temperatures require special consideration Keep in mind the following points a Be sure that the surface temperature of the test piece does not exceed the...

Страница 123: ...erial sound velocity and transducer zero offset will change with temperature For maximum accuracy at high temperatures velocity calibration should be performed using a section of the test bar of known...

Страница 124: ...rator In general unexplained readings by a corrosion gage merit further testing with a flaw detector g For further information on the use of dual element transducers in corrosion gaging or for informa...

Страница 125: ...ugged devices that need little care They are not indestructible however and a little attention to the following items will result in the longest transducer life The cables can be damaged by cutting pi...

Страница 126: ...rocedure but some may indicate a physical problem with the gage itself Consult Panametrics NDT for further information 9 4 Turn On And Low Battery Problems The bars on the batteries symbol show operat...

Страница 127: ...nt especially on rough or curved surfaces Step 3 Try the same transducer on a smooth flat surfaced test sample Step 4 If the tests above all pass but measurements still cannot be made try Gain Adjust...

Страница 128: ...material properties Extreme non parallelism Excessively sharp curvature 9 6 Self Diagnostics MG2 Series corrosion thickness gages include two self diagnostic screens that permit the user to identify...

Страница 129: ...information about your MG2 series gage Step 1 Press 2ndF Setup to display the setup tabs Step 2 Use the keys to highlight the DIAG2 tab The following results are displayed Gain Internal Calibration BL...

Страница 130: ...is a problem with the transducer SW REV Reports software version 1 00 1 00G Battery Indicates current battery volt age Probe Indicates current attached probe PR TX Indicates the time of flight for the...

Страница 131: ...pad keys VIDEO Tests to assure that pixel locations are functional 9 7 1 KEYPAD TEST The KEYPAD TEST tests to assure that keypad keys are functional The KEYPAD TEST displays an image of the keypad on...

Страница 132: ...e screen to the TESTS tab Step 2 Press the arrow to select KEYPAD TEST and then press ENTER or 2ndF to abort the test Determine visually that the keypad keys are functional Step 3 Press ENTER to Exit...

Страница 133: ...2ndF and use the arrow to move across the top of the screen to the TESTS tab Step 2 Press the arrow to select VIDEO TEST and then press ENTER or 2ndF to abort the test Determine visually that video pi...

Страница 134: ...air any MG2 gage at its Waltham Massachusetts USA factory In addition some local Panametrics NDT dealers can perform repairs 9 9 Replacement Parts And Optional Parts And Equipment Replacement parts fo...

Страница 135: ...uch as composition preferred crystallographic orientation porosity and temperature Therefore for maximum accuracy establish the sound velocity in a given material by first testing a sample of the mate...

Страница 136: ...w 0 087 2200 Nylon fast 0 102 2600 Polyethylene high density HDPE 0 097 2460 Polyethylene low density LDPE 0 082 2080 Polystyrene 0 092 2340 Polyvinylchloride PVC hard 0 094 2395 Rubber polybutadiene...

Страница 137: ...L Folds Experimental Determination of Ultrasonic Wave Velocities in Plastics Elastomers and Syntactic Foam as a Function of Temperature Naval Research and Development Laboratory Panama City Florida 1...

Страница 138: ...910 257C March 2006 Page I 4 MG2 Series...

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