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DMTA-10043-01EN, Rev. C, July 2016

Chapter 9

60

The microprocessor also directs the receiver/detector to identify the transducer type
using the I.D. pin of the transducer. Calibration values and gage setups are saved in
non-volatile RAM (random access memory). The keyboard informs the
microprocessor of user-entered changes of mode, values, and so on.

Figure 9

‑

1 27MG block diagram

Battery

Power
supply

ROM

RAM

LCD

Keyboard

Pulser

AGC
amplifier

Detector

Control and

Measure

Transducer

USB

For software

upgrade only

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Содержание 27MG

Страница 1: ...ual This instruction manual contains essential information on how to use this Olympus product safely and effectively Before using this product thoroughly review this instruction manual Use the product...

Страница 2: ...ccuracy of the information contained therein and corresponds to the version of the product manufactured prior to the date appearing on the title page There could however be some differences between th...

Страница 3: ...Safety Symbols 6 Safety Signal Words 7 Note Signal Words 7 Warnings 8 Battery Precautions 9 Equipment Disposal 9 CE European Community 9 WEEE Directive 10 China RoHS 10 Korea Communications Commission...

Страница 4: ...tion 36 5 4 Material Velocity Calibration 37 5 5 Zero Calibration 39 6 Measurements 41 7 Additional 27MG Gaging Features 43 7 1 Adjusting the Backlight 44 7 2 Activating the Freeze Mode 45 7 3 Adjusti...

Страница 5: ...and Maintenance 69 11 2 Transducers Maintenance 69 11 3 Error Messages 70 11 4 Battery Problems 70 11 5 Setup Do Problems 70 11 6 Measurement Problems Diagnostic 70 11 7 Self Diagnostics 71 11 8 Gage...

Страница 6: ...DMTA 10043 01EN Rev C July 2016 Table of Contents vi...

Страница 7: ...List of Abbreviations DIAG diagnostic DIFF differential EFUP environment friendly use period IP Ingress Protection LOS loss of signal Max maximum Min minimum NiMH nickel metal hydride PDF portable doc...

Страница 8: ...DMTA 10043 01EN Rev C July 2016 List of Abbreviations viii...

Страница 9: ...e locations shown in Figure i 1 on page 1 The symbols are described in Table 1 on page 2 and Table 2 on page 3 If any or all of the labels or symbols are missing or illegible please contact Olympus Fi...

Страница 10: ...ion of Conformity for details Contact your Olympus representative for more information The regulatory compliance mark RCM label indicates that the product complies with all applicable standards and ha...

Страница 11: ...will not leak or chemically deteriorate while in the product The EFUP for the 27MG has been determined to be 15 years Note The Environment Friendly Use Period EFUP is not meant to be interpreted as t...

Страница 12: ...DMTA 10043 01EN Rev C July 2016 Labels and Symbols 4 Figure i 2 Risk of electrical shock on T R connectors inner conductors T R1 and T R2 connectors inner conductors...

Страница 13: ...her than its intended use It must never be used to inspect or examine human or animal body parts Instruction Manual This instruction manual contains essential information on how to use this Olympus pr...

Страница 14: ...jury and or equipment damage do not disassemble modify or attempt to repair the instrument Safety Symbols The following safety symbols might appear on the instrument and in the instruction manual Gene...

Страница 15: ...formed or adhered to could result in death or serious personal injury Do not proceed beyond a WARNING signal word until the indicated conditions are fully understood and met The CAUTION signal word in...

Страница 16: ...e Follow the installation and operation procedures It is imperative to respect the safety warnings on the instrument and in this instruction manual If the equipment is used in a manner not specified b...

Страница 17: ...g so could expose the cell contents which are corrosive and explosive Do not short circuit the battery terminals A short circuit could cause injury and severe damage to a battery making it unusable Do...

Страница 18: ...symbol indicates that the product must not be disposed of as unsorted municipal waste but should be collected separately Refer to your local Olympus distributor for return and or collection systems av...

Страница 19: ...e 27MG has been tested and found to comply with the limits for an industrial device in accordance with the specifications of the EMC directive FCC USA Compliance This equipment has been tested and fou...

Страница 20: ...at has not been subjected to excessive abuse attempted unauthorized repair or modification Inspect materials thoroughly on receipt for evidence of external or internal damage that might have occurred...

Страница 21: ...rt Olympus is firmly committed to providing the highest level of customer service and product support If you experience any difficulties when using our product or if it fails to operate as described i...

Страница 22: ...DMTA 10043 01EN Rev C July 2016 Important Information Please Read Before Use 14...

Страница 23: ...kness measurement applications With the 27MG you only need access to one side of a part in order to obtain nondestructive measurements of the thickness of corroded pitted granular and other difficult...

Страница 24: ...irement of the IP65 rating Ingress Protection rating Olympus cannot guarantee any level of Ingress Protection rating once the instrument seals have been manipulated You must use sound judgment and tak...

Страница 25: ...igure 1 2 The 27MG connections The universal serial bus USB and Transmit Receive transducer connectors are located on the top of the 27MG see Figure 1 3 on page 18 The USB connector on the 27MG is onl...

Страница 26: ...nctions are the same for both keypads On the international keypad the text labels on many keys are replaced by pictograms In this document keypad keys are referred to using the English label in bold a...

Страница 27: ...se the MEAS key at any time to return to the measurement screen The yellow keys are related to calibration Table 3 on page 19 lists the key functions available on the 27MG keypad Table 3 Keypad functi...

Страница 28: ...position to the right Velocity calibration Switches to the semiautomatic material velocity calibration mode Velocity Opens a screen allowing you to view and manually change the sound velocity Zero cal...

Страница 29: ...6 Instrument Description 21 Power Turns the instrument power on or off LCD Adjust Turns on or off the backlight feature that internally illuminates the LCD screen Table 3 Keypad functions continued En...

Страница 30: ...DMTA 10043 01EN Rev C July 2016 Chapter 1 22...

Страница 31: ...bottom right corner of the screen The 27MG can be powered by three AA sized batteries by a computer through its USB connector or by a commercially available 5 volt USB power supply When using batteri...

Страница 32: ...el operating parameters update rate set to 4 Hz The nominal alkaline battery operating times for new batteries is 150 hours under normal conditions typical 30 hours continuous with back light The batt...

Страница 33: ...ed Do not disassemble heat above 50 C 122 F or incinerate the batteries To replace the batteries 1 Ensure that the 27MG is turned off 2 Disconnect any cables that are connected to the 27MG 3 Remove th...

Страница 34: ...ons 9 Reinstall the optional protective rubber boot if required 10 Press the power button to turn on the 27MG instrument 11 To answer the battery type setup question displayed at the bottom of the scr...

Страница 35: ...measurement screen contains the elements described in Figure 3 1 on page 27 Figure 3 1 The measurement screen The measurement screen is the main screen of the 27MG software From anywhere in the 27MG s...

Страница 36: ...3 2 Parameter Screens The 27MG setup parameters are logically grouped in tabs that can be accessed using the 2nd F and down arrow SETUP front panel keys Figure 3 3 on page 29 shows the MEAS tab as an...

Страница 37: ...er screen example In the remainder of this document the above procedure is summarized by the simple instruction to select a specific parameter or list and its value For example In the MEAS tab set UNI...

Страница 38: ...DMTA 10043 01EN Rev C July 2016 Chapter 3 30...

Страница 39: ...s ease of use Further explanation of these default conditions can be found in later sections of this manual These conditions may be changed after the operator becomes familiar with the advanced featur...

Страница 40: ...to the calibration instructions To operate the 27MG Ultrasonic Thickness Gage for the first time the initial setup must be completed To perform the initial setup 1 Plug the transducer into the connec...

Страница 41: ...e 4 2 on page 33 Figure 4 2 The Zero screen 5 You are now ready to make measurements The current units are indicated on the right of the display Alternate between millimeters MM and inches IN by press...

Страница 42: ...DMTA 10043 01EN Rev C July 2016 Chapter 4 34...

Страница 43: ...f block procedure must be done when the gage is turned on when the transducer is changed and whenever the transducer temperature changes significantly Material velocity calibration or CAL VEL Done usi...

Страница 44: ...de When measurements are being made on surfaces that are significantly above or below room temperature 2nd F CAL ZERO Do ZERO should be pressed to compensate for any temperature changes in the transdu...

Страница 45: ...upled to the thin calibration block should be within 0 20 mm 0 010 in of the correct thickness If the indicated thickness is two or more times the actual thickness of the thin calibration block with a...

Страница 46: ...or unknown material velocity 1 Update the transducer zero compensation by wiping the transducer face clean of all couplant and pressing 2nd F CAL ZERO Do ZERO 2 Couple the transducer to the block 3 Pr...

Страница 47: ...for a known material velocity 1 In measurement mode press 2nd F CAL VEL VEL The current velocity will be displayed 2 This number may then be changed to the desired value using the and arrow keys 3 Pr...

Страница 48: ...epted if the LOS flag is displayed 5 Uncouple the transducer and use the and arrow keys to enter the thickness of the standard 6 Press the MEAS key to complete the calibration and return to measuremen...

Страница 49: ...k or material at the spot to be measured In general the smoother the material surface the thinner the couplant may be Rough surfaces require more viscous couplant such as gel or grease Special couplan...

Страница 50: ...DMTA 10043 01EN Rev C July 2016 Chapter 6 42...

Страница 51: ...versatile instrument The following additional features can be accessed directly from the keypad Backlight Freeze Gain adjust Material gain sensitivity optimization Default gain restoration Other featu...

Страница 52: ...auto backlight mode which only turns the backlight on when a reading is being made and then turns it off five seconds after LOS To select auto backlight 1 Press 2nd F SETUP 2 Use to select the SYSTEM...

Страница 53: ...recommended for all high temperature measurements To adjust the gain from the default gain value From the measurement mode press 2nd F GAIN to toggle between GAIN HIGH to GAIN LOW and DEFAULT GAIN 7...

Страница 54: ...ic material gain sensitivity optimization 1 From the measurement mode press 2nd F ENTER GAIN OPT The gage will display 0 000 2 Use the and keys to select to the approximate wall thickness It is best t...

Страница 55: ...7 6 2 Changing Resolution Resolution allows the user to change the number of decimal points displayed in the thickness display The user can select between STANDARD 0 01 mm 0 001 in and LOW 0 1 mm 0 01...

Страница 56: ...replaces it or until the MEAS key is pressed to reset the maximum When MAX is selected the 27MG automatically changes to a 20 Hz fast update mode To configure the Min Max mode 1 Press 2nd F SETUP to d...

Страница 57: ...eter 1 Press 2nd F SETUP to display the setup tabs 2 Use the keys to highlight the MEAS tab 3 Use the key to highlight MEASURE RATE and the keys to select between NORMAL 4 Hz and FAST 20 Hz 4 Press ME...

Страница 58: ...udio beep when any key is pressed or when an alarm condition has been detected To configure the beeper 1 Press 2nd F SETUP to display the setup tabs 2 Use the keys to highlight the SYSTEM tab 3 Use th...

Страница 59: ...period is used as radix example 0 123 in To change the Radix parameter 1 Press 2nd F SETUP to display the setup tabs 2 Use the keys to highlight the SYSTEM tab 3 Use the key to highlight RADIX and to...

Страница 60: ...ctive but not above or below set points the gage displays an A L When a low alarm condition occurs the gage displays an L H When set points have been violated a high alarm condition occurs and the gag...

Страница 61: ...de are mutually exclusive they cannot be used at the same time If one of these function is activated it will be automatically turned off if the other function is turned on To activate Diff mode 1 Pres...

Страница 62: ...re Rate Normal CAL Lock Off Beeper On Inactive Time On Radix Period Backlight mode Normal Alarm Off Default Values Low 0 000 High 25 000 Diff Off Default Value 0 000 To reset measurement parameters 1...

Страница 63: ...it will reset all the default setup parameters To preset the instrument parameters 1 Press 2nd F SETUP to display the setup tabs 2 Use the keys to highlight the RESET tab 3 Use the key to highlight MA...

Страница 64: ...DMTA 10043 01EN Rev C July 2016 Chapter 7 56...

Страница 65: ...g on material transducer surface conditions temperature Material velocity range 0 508 mm s to 18 699 mm s 0 020 in s to 0 7362 in s Resolution selectable Low 0 1 mm 0 01 in Standard 0 01 mm 0 001 in T...

Страница 66: ...STD 810F 511 4 Procedure I Standards Designed for EN15317 Alarm mode Programmable Hi Low set points with audible and visual indicators Display Display Hold Blank mode Holds or blanks the display afte...

Страница 67: ...ucer are coupled into the test piece travel through it and are reflected back from the opposite side The reflected sound waves or echoes are coupled into the receive side of the transducer where they...

Страница 68: ...the transducer Calibration values and gage setups are saved in non volatile RAM random access memory The keyboard informs the microprocessor of user entered changes of mode values and so on Figure 9 1...

Страница 69: ...cases it will be necessary to file or grind the surface sufficiently flat to permit contact with the face of the transducer In applications where deep pitting occurs on the outside of a pipe or tank...

Страница 70: ...as the accuracy and care with which the gage has been calibrated It is essential that the velocity and zero calibrations be performed whenever the test material or transducer is changed Periodic chec...

Страница 71: ...limited 10 2 Transducer Selection For any ultrasonic measurement system transducer plus thickness gage there is a minimum material thickness below which valid measurements will not be possible Normal...

Страница 72: ...0 040 in to 20 in 20 C to 500 C 5 F to 932 F D791 5 0 Right angle 11 0 mm 0 434 in 1 mm to 500 mm 0 040 in to 20 in 20 C to 500 C 5 F to 932 F D791 RM 5 0 Right angle 11 0 mm 0 434 in 1 mm to 500 mm...

Страница 73: ...5 0 Straight 7 2 mm 0 283 in 0 75 mm to 50 mm 0 030 in to 2 in 0 C to 50 C 32 F to 122 F D797 D797 SM 2 0 Right angle Straight 22 9 mm 0 900 in 3 8 mm to 635 mm 0 150 in to 25 in 20 C to 400 C 5 F to...

Страница 74: ...Couplant H 2 can be used at temperatures up to 398 C 750 F although it will boil as the upper limit is reached Maximum recommended temperatures for Olympus couplants are provided in Table 7 on page 6...

Страница 75: ...or crack detection and cannot be relied upon to detect material discontinuities A proper evaluation of material discontinuities requires an ultrasonic flaw detector such as the EPOCH used by a properl...

Страница 76: ...DMTA 10043 01EN Rev C July 2016 Chapter 10 68...

Страница 77: ...s Gage are rugged 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 b...

Страница 78: ...MG Ultrasonic Thickness Gage turns off immediately after it is turned on or if it does not turn on at all then the battery is probably completely discharged The batteries should be replaced If after r...

Страница 79: ...make measurements and to do step 1 If this works then the original transducer is defective Otherwise the pulser receiver assembly is probably defective 6 If the above tests indicate that there is a p...

Страница 80: ...rovided in Table 9 on page 72 are displayed Table 8 DIAG1 results GAIN Internal Calibration BLK DET SMP Internal Blank Detector and Sampler Test THRESH CAL RCVR1 Threshold Calibration Test Receiver 1...

Страница 81: ...age performance see Figure 11 1 on page 73 KEYPAD Tests keypad keys VIDEO Tests to assure that pixel locations are functional Figure 11 1 Tests screen 11 8 1 KEYPAD TEST The Keypad Test function tests...

Страница 82: ...ss the arrow to select KEYPAD TEST and then press ENTER to start the test or press 2nd F to abort the test Visually determine that the keypad keys are functional 3 Press ENTER to go back to the TESTS...

Страница 83: ...est or press 2nd F to abort the test Determine visually that video pixels are functional by observing if white spots occur in the screen test display 3 Press ENTER to go back to the TESTS screen 11 9...

Страница 84: ...DMTA 10043 01EN Rev C July 2016 Chapter 11 76...

Страница 85: ...n 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 material Table 10 Ult...

Страница 86: ...0 097 2460 Polyethylene low density LDPE 0 082 2080 Polystyrene 0 092 2340 Polyvinylchloride PVC hard 0 094 2395 Rubber polybutadiene 0 063 1610 Silicon 0 379 9620 Silicone 0 058 1485 Steel 1020 0 232...

Страница 87: ...y Sons Inc New York 1965 4 D L Folds Experimental Determination of Ultrasonic Wave Velocities in Plastics Elastomers and Syntactic Foam as a Function of Temperature Naval Research and Development Labo...

Страница 88: ...DMTA 10043 01EN Rev C July 2016 Appendix 80...

Страница 89: ...partment 25 Figure 2 3 Selecting the battery type 26 Figure 3 1 The measurement screen 27 Figure 3 2 Other elements of the measurement screen 28 Figure 3 3 Parameter screen example 29 Figure 4 1 Trans...

Страница 90: ...DMTA 10043 01EN Rev C July 2016 List of Figures 82...

Страница 91: ...on and rating label 2 Table 2 Content of the serial number label 3 Table 3 Keypad functions 19 Table 4 Default conditions 31 Table 5 Specifications 57 Table 6 Transducer selection 64 Table 7 Couplant...

Страница 92: ...DMTA 10043 01EN Rev C July 2016 List of Tables 84...

Страница 93: ...0 replacing 24 25 caution 25 fully charged 26 storage instructions 24 type alkaline 24 NiMH rechargeable 24 using 24 beeper audio alarm 50 Blank mode LCD display 31 boot protective rubber 16 C CAL LOC...

Страница 94: ...compliance 11 EN15317 standards designed for 58 English keypad 18 ENTER key 19 environmental rating 16 equipment disposal 9 error messages 70 ESC secondary key 19 explosive atmosphere safe operation...

Страница 95: ...C 19 GAIN 19 GAIN OPT 19 SETUP 20 VEL 20 known material sound velocity 39 Korea Communications Commission KCC marking 3 symbol 11 Korean standard See Korea Communications Commission KCC L labels 1 ins...

Страница 96: ...ns 28 power key 17 21 power level batteries 23 power requirements instrument 23 powering on instrument See turning on instru ment precautions batteries 9 product description 15 protective rubber boot...

Страница 97: ...ompensation calibration 36 transducers connectors Transmit Receive 17 diagnosing defective 70 dual element measurement mode 57 frequency range 57 high temperature measurements 65 maintenance 69 positi...

Страница 98: ...DMTA 10043 01EN Rev C July 2016 Index 90...

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