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Appendix A Sound Velocities

Material

Sound Velocity

in/

µ

s

m/s

Aluminum

0.250

6340-6400

Steel, common

0.233

5920

Steel, stainless

0.226

5740

Brass

0.173

4399

Copper

0.186

4720

Iron

0.233

5930

Cast Iron

0.173-0.229

4400

－

5820

Lead

0.094

2400

Nylon

0.105

2680

Silver

0.142

3607

Gold

0.128

3251

Zinc

0.164

4170

Titanium

0.236

5990

Tin

0.117

2960

0.109

2760

Epoxy resin

0.100

2540

Ice

0.157

3988

Nickel

0.222

5639

Plexiglass

0.106

2692

Polystyrene

0.092

2337

Porcelain

0.230

5842

PVC

0.094

2388

Quartz glass

0.222

5639

Rubber, vulcanized

0.091

2311

Teflon

0.056

1422

Water

0.058

1473

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Содержание MT200

Страница 1: ...Ultrasonic Thickness Gauge MT200 User s Manual MITECH CO LTD www mitech ndt com www ponpe com ...

Страница 2: ...4 2 Transducer Set 10 4 3 Probe Zero 11 4 4 Sound Velocity 11 4 5 Making Measurements 12 4 6 Two Point Calibration 13 4 7 Scan mode 14 4 9 Resolution 14 4 10 Unit Scale 14 4 11 Memory Management 15 4 12 Data Printing 16 4 13 System Set 16 4 14 System information 17 4 15 EL Backlight 17 4 16 Battery Information 17 4 17 Auto Power Off 17 4 18 System Reset 17 4 19 Connecting to a Computer 17 5 Menu O...

Страница 3: ...3 mvip mitech ndt com Appendix A Sound Velocities 20 Appendix B Applications Notes 21 User Notes 23 sale ponpe com ponpe com ...

Страница 4: ... 2 Main Functions Capable of performing measurements on a wide range of material including metals plastic ceramics composites epoxies glass and other ultrasonic wave well conductive materials Four transducer models are available for special application including for coarse grain material and high temperature applications Probe Zero function Sound Velocity Calibration function Two Point Calibration...

Страница 5: ...g Manual 1 6 Screwdriver 1 7 Alkaline battery 2 AA size 8 Optional Configur ation 9 Transducer N02 See Table3 1 10 Transducer N07 11 Transducer HT5 12 Mini thermal printer 1 13 Print cable 1 14 DataPro for Thickness Gauge 1 For use on the PC 15 Communication Cable 1 1 5 Operating Conditions Operating Temperature 20 60 Storage Temperature 30 70 Relative Humidity 90 The surrounding environment shoul...

Страница 6: ...e 4 Battery Cover 5 Keypad 6 LCD Display 7 Socket of Transducer no polarity 8 Probe zero disc 9 Aluminum Case 10 Label MT200 M i Tech 2 1 8 Enter MiTech Inc Ltd 5 Switch Selection 6 Save Delete 7 Exit 3 M i Tech 4 8 2 Power On Off POWER 2 X 1 5V 4 Probe Zero OPERATION GUIDE 1 Plug in the transducer 3 Backlight On Off THICKNESS GAUGE MT200 2 9 5 6 SN 7 10 sale ponpe com ...

Страница 7: ...s Operating Hint Show hints of current operation FIL File selection MEM Memory data viewing PRB Transducer set VEL Change velocity CAL Velocity calibration DPC Dual Point Calibration state ZER Probe zero state SCA Indicate that current thickness measurement mode is scan mode and not single point mode File Name show current file name Record No Count Indicate current record number while this item is...

Страница 8: ...operties of transducers which should be considered when selecting a transducer for a specific job Generally speaking the best transducer for a job is one that sends sufficient ultrasonic energy into the material being measured such that a strong stable echo is received by the gauge Several factors affect the strength of ultrasound as it travels These are outlined below Initial Signal Strength The ...

Страница 9: ...o calculate the thickness of the material being measured The transducer connects to the instrument via the attached cable and two coaxial connectors When using transducers the orientation of the dual coaxial connectors is not critical either plug may be fitted to either socket in the instrument The transducer must be used correctly in order for the instrument to produce accurate reliable measureme...

Страница 10: ...mes diffused and scattered in all directions In addition to posing obstacles to measurement rough surfaces contribute to excessive wear of the transducer particularly in situations where the transducer is scrubbed along the surface Transducers should be inspected on a regular basis for signs of uneven wear of the wearface If the wearface is worn on one side more than another the sound beam penetra...

Страница 11: ...int the instrument has successfully calculated its internal error factor and will compensate for this value in any subsequent measurements When performing a probe zero the instrument will always use the sound velocity value of the built in probe disc even if some other velocity value has been entered for making actual measurements Though the instrument will remember the last probe zero performed i...

Страница 12: ...y to switch among the preset commonly using velocities Use the key and the key to adjust the sound velocity value up or down until it matches the sound velocity of the material to be measured 3 Press the key to exit from the calibration mode The gauge is now ready to perform measurements 4 Another method to set the instrument with a known sound velocity is as following 5 Highlight the Test Set Vel...

Страница 13: ...last measurement made Note Occasionally a small film of couplant will be drawn out between the transducer and the surface as the transducer is removed When this happens the gauge may perform a measurement through this couplant film resulting in a measurement that is larger or smaller than it should be This phenomenon is obvious when one thickness value is observed while the transducer is in place ...

Страница 14: ...d When the transducer is removed from the material being scanned the gauge will display the smallest measurement it found On the Test Set Work Mode menu item press to toggle between single point mode and scan mode 4 8 Resolution The Limit Set feature of the gauge allows the user to set an audible and visual parameter when taking measurements If a measurement is beyond the limit range set by the us...

Страница 15: ... is highlighted Use the key and the key to change the record number The gauge will automatically read the stored values according the record number from the memory and display them on the Thickness Reading area of the screen simultaneously If you want to delete the displaying record data from the memory just press the key The other way to view the stored record is by menu operations On the Memory ...

Страница 16: ...le to the mini printer via RS232 port and print them out 4 12 2 Print Selected File Enter the Print function menu screen and highlight the Print Memory menu item then press the key After specifying the start file name and the end file name the gauge will send all the data in the files specified to print out 4 12 3 Print All Memory Enter the Print function menu screen and highlight the Print All Me...

Страница 17: ...off the cover of the battery and take out the two batteries 3 Insert the new batteries into the instrument 4 Replug the battery cover 5 Power on the instrument to check Please take out the batteries when not working during a long period of time Suggest to replace the batteries when the battery capacity indicator shows half capacity 4 17 Auto Power Off The instrument features an auto power off func...

Страница 18: ...to tab to the numeric digit to be changed Use the key to increase decrease numeric values on the display until it matches the desired value 5 5 Save and Exit Press the key to confirm the modifying and return back to the previous screen 5 6 Cancel and Exit Press the key to cancel the change and return back to the previous screen 6 Servicing When the hardness tester appears some other abnormal pheno...

Страница 19: ...ort and Storage 1 Keep it away from vibration strong magnetic field corrosive medium dumpiness and dust Storage in ordinary temperature 2 With original packing transport is allowed on the third grade highway sale ponpe com ponpe com ...

Страница 20: ...3 5930 Cast Iron 0 173 0 229 4400 5820 Lead 0 094 2400 Nylon 0 105 2680 Silver 0 142 3607 Gold 0 128 3251 Zinc 0 164 4170 Titanium 0 236 5990 Tin 0 117 2960 0 109 2760 Epoxy resin 0 100 2540 Ice 0 157 3988 Nickel 0 222 5639 Plexiglass 0 106 2692 Polystyrene 0 092 2337 Porcelain 0 230 5842 PVC 0 094 2388 Quartz glass 0 222 5639 Rubber vulcanized 0 091 2311 Teflon 0 056 1422 Water 0 058 1473 sale po...

Страница 21: ...erial When performing measurements on hot surfaces it may also be necessary to use a specially constructed high temperature transducer These transducers are built using materials which can withstand high temperatures Even so it is recommended that the probe be left in contact with the surface for as short a time as needed to acquire a stable measurement While the transducer is in contact with a ho...

Страница 22: ... Propylene glycol is suitable for most applications In difficult applications where maximum transfer of sound energy is required glycerin is recommended However on some metals glycerin can promote corrosion by means of water absorption and thus may be undesirable Other suitable couplants for measurements at normal temperatures may include water various oils and greases gels and silicone fluids Mea...

Страница 23: ...ing to repair sheet In accordance with the international relevant regulations the following are not within the scope of free warranty Damage caused by man made or improper keeping Self dismantle or non special repair shop dismantle Do not follow the requirement of service registration or warranty expired Consumable parts Service promise MITECH users have lifelong maintenance service Free maintenan...

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