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MiniTest 403

Technical Reference and Operating Manual

Advancing with Technology

Elektro

Physik

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Содержание MiniTest 403

Страница 1: ...MiniTest 403 Technical Reference and Operating Manual Advancing with Technology ElektroPhysik ...

Страница 2: ...ktrophysik com Disclaimer Inherent in ultrasonic thickness measurement is the possibility that the instrument will use the second rather than the first echo from the back surface of the material being measured This may result in a thickness reading that is TWICE what it should be Responsibility for pro per use of the instrument and recognition of this phenomenon rests solely with the user of the i...

Страница 3: ... Probe Zero E 10 5 Calibration E 11 5 1 Calibration to a known thickness E 11 5 2 Calibration to a known velocity E 12 5 3 Two Point Calibration E 13 6 Scan Mode E 14 7 Transducer Selection E 14 8 Product Specifications E 16 9 Application Notes E 17 9 1 Measuring Pipe and Tubing E 17 9 2 Measuring Hot Surfaces E 17 9 3 Measuring Laminated Materials E 18 10 Sound Velocities E 19 11 After Sales Serv...

Страница 4: ...ontrols and display The second section provides guidelines in selecting a transducer for a specific application The last section provides application notes and a table of sound velocity values for various materials ElektroPhysik maintains a customer support resource in order to assist users with questions or difficulties not covered in this manual Customer support may be reached at any of the foll...

Страница 5: ...tions of the various keys on the keypad are detailed below followed by an explanation of the display and its various symbols Introduction 2 1 Keypad ON OFF Key This key is used to turn the MINITEST 403 on and off When the gauge is turned ON it will first perform a brief display test by illuminating all of the segments in the display After one second the gauge will display the internal software ver...

Страница 6: ...lue Refer to Section Performing a probe Zero for an explanation of this important procedure Keypad CAL Key The CAL key is used to enter and exit the MINITEST 403 s calibration mode This mode is used to adjust the sound velocity value that the MINITEST 403 will use when calculating thickness The gauge will either calculate the sound velocity from a sample of the mate rial being measured or allow a ...

Страница 7: ...e DOWN arrow key has two functions When the MINITEST 403 is in the CAL mode this key is used to decrease numeric values on the display An auto repeat function is built in so that when the key is held down numeric values will decrement at an increasing rate When the MINITEST 403 is not in calibration mode the DOWN arrow key switches the display backlight between three available settings OFF will be...

Страница 8: ... measurement is made Note Additionally when the battery voltage is low the entire display will begin to flash When this occurs the batteries should be replaced immediately These eight vertical bars form the Stability Indicator When the MINITEST 403 is idle only the left most bar and the underline will be on When the gauge is making a measurement six or seven of the bars should be on If fewer than ...

Страница 9: ...999 9 millimeters to be displayed When the IN symbol is on the MINITEST 403 is displaying a thickness value in inches The maximum thickness that can be displayed is 19 999 inches When the M symbol is on in conjunction with the s symbol the MINITEST 403 is displaying a sound velocity value in meters per second When the IN symbol is on in conjunction with the ms symbol the MINITEST 403 is displaying...

Страница 10: ...ce that is being measured The transducer is the business end of the MINITEST 403 It transmits and receives the ultrasonic sound waves which the MINITEST 403 uses to calculate the thickness of the material being measured The trans ducer connects to the MINITEST 403 via the attached cable and two coaxial connectors When using transducers manufactured by the same supplier the orientation of the dual ...

Страница 11: ...ducer wearface down firmly against the area to be measured The Stability Indicator should have six or seven bars darkened and a number should appear in the display If the MINITEST 403 has been properly zeroed see section Probe Zero and set to the correct sound velocity see Sound Velecity Selection Table the number in the display will indicate the actual thickness of the material directly beneath t...

Страница 12: ...vent the transducer from seating properly against the surface Often a wire brush or scraper will be helpful in cleaning surfaces In more extreme cases rotary sanders or grinding wheels may be used though care must be taken to prevent surface gouging which will inhibit proper transducer coupling Extremely rough surfaces such as the pebble like finish of some cast irons will prove most difficult to ...

Страница 13: ...against the probe disc making sure that the transducer sits flat against the surface of the probe disc The display should Probe Zero show some thickness value and the Stability Indicator should have nearly all its bars illuminated While the transducer is firmly coupled to the probe disc press the PRB 0 key on the keypad The MINITEST 403 will display Prb0 while it is calculating its zero point 5 Re...

Страница 14: ...y over small ranges by calculating the probe zero and velocity The MINITEST 403 provides three simple methods for setting the sound velocity described in the following pages 5 1 Calibration to a known thickness Note NOTE This procedure requires a sample piece of the specific material to be measured the exact thickness of which is known e g from having been measured by some other means 1 Make sure ...

Страница 15: ...ix C 1 Make sure the MINITEST 403 is on 2 Press the CAL key to enter calibration mode If the MM or IN symbol is flashing press the CAL key again so that the M s or IN ms symbols are flashing 3 Use the UP and DOWN arrow keys to adjust the displayed velocity up or down until it matches the sound velocity of the material to be measured 4 Press the CAL key once more to exit the calibration mode The MI...

Страница 16: ...e surface of the sample The display should show some probably incorrect thickness value and the Stability Indicator should have nearly all its bars on 5 Having achieved a stable reading remove the transducer If the displayed thickness changes from the value shown while the transducer was coupled repeat step 4 6 Press the CAL key The MM or IN symbol should begin flashing 7 Use the UP and DOWN arrow...

Страница 17: ...ration mode press the UP arrow key to turn Scan Mode on and off A brief message will appear in the display confirming the operation When the transducer is removed from the material being scanned the MINITEST 403 will after a brief pause display the smallest measurement it found 7 Transducer Selection The MINITEST 403 is inherently capable of performing measurements on a wide range of materials fro...

Страница 18: ...an high frequencies Thus a higher frequency transducer would be a better choice for detecting the exact location of small pits or flaws in the material being measured Geometry of the Transducer The physical constraints of the measuring environment sometimes determine a transducer s suitability for a given job Some transducers may simply be too large to be used in tightly confined areas Also the su...

Страница 19: ...auge 284 g 10 ounces Size of Gauge W x H x D 64 mm x 121 mm x 32 mm 2 5 x 4 75 x 1 25 Operating Temperature 20 to 50 C 20 to 120 F Case Extruded aluminum body nickel plated aluminum end caps Keypad Sealed mebrane resistant to water and petroleum products Power Source 2 x AA 1 5 Volt alcaline cells typical operting time 200 hours or 2 x 1 2 Volt NiCad cells typical operating time 120 hours Display ...

Страница 20: ...hrough them decreases In most applications with surface temperatures less than about 100 C 200 F no special procedures must be observed At temperatures above this point the change in sound velocity of the material being measured starts to have a noticeable effect upon ultrasonic measurement At such elevated temperatures it is recommended that the user perform a calibration procedure refer to secti...

Страница 21: ...n a sample piece of known thickness Ideally this sample material should be a part of the same piece being measured or at least from the same lamination batch By calibrating to each test piece individually the effects of variation of sound velocity will be minimized An additional important consideration when measuring laminates is that any included air gaps or pockets will cause an early reflection...

Страница 22: ...0 0 180 Constantan 5230 0 206 Copper 4670 0 184 Epoxy resin approx 2540 0 100 German silver 4750 0 187 Glass crown 5660 0 223 Glass flint 4270 0 168 Material Sound Velocity m s in µs Gold 3240 0 128 Ice 3990 0 157 Iron 5890 0 232 Lead 2160 0 085 Magnesium 5800 0 228 Mercury 1450 0 057 Nickel 5630 0 222 Nylon approx 2590 0 102 Paraffin 2210 0 087 Platinum 3960 0 156 Plexiglass 2690 0 106 ...

Страница 23: ...890 0 230 PVC 2395 0 094 Quartz glass 5640 0 222 Rubber vulcanized 2300 0 091 Silver 3600 0 142 Steel common 5920 0 233 Steel stainless 5660 0 223 Stellite approx 6985 0 275 Teflon 1420 0 056 Tin 3320 0 131 Material Sound Velocity m s in µs Titanium 6100 0 240 Tungsten 5330 0 210 Zinc 4190 0 166 Water 1480 0 058 ...

Страница 24: ...on If there is anything specific you would like to know about the use handling operation or specifications of the gauges please contact your nearest ElektroPhysik representative or the following addresses direct After Sales Service Germany ElektroPhysik Dr Steingroever GmbH Co KG Pasteurstr 15 50735 Köln Tel 49 0 2 21 7 52 04 0 Fax 49 0 2 21 7 52 04 67 mail info elektrophysik com web www elektroph...

Страница 25: ...coaxial connector E 7 couplant E 8 E 9 E 10 E 11 E 13 coupling fluid E 2 D display backlight E 4 E echoed sound E 7 excessive wear E 9 F frequency E 8 E 15 G Geometry E 15 I IN MM Taste E 3 inherent sounE velocities E 11 Initial Signal Strength E 15 Initial signal strength E 15 internal error factor E 10 L linearity over large ranges E 11 M Material composition E 12 metric units E 2 E 3 ...

Страница 26: ... D 15 single measurement D 14 socket D 7 sound velocity D 3 soundbeam D 9 Stability Indicator D 5 D 8 D 10 D 11 D 13 T Temperature of the Material D 15 temperature of the material D 17 Transducer D 7 D 8 D 9 D 14 D 15 transducer D 1 D 2 D 7 D 8 D 9 D 10 D 11 D 13 D 14 D 15 D 16 D 17 U ultrasonic sound waves D 7 D 8 V vertical bars D 5 W wearface D 7 D 8 D 9 D 10 D 15 D 17 D display backlight D 4 E...

Страница 27: ...g E 15 scattering E 15 Signal E 15 signal E 15 single measurement E 14 socket E 7 sound velocity E 3 soundbeam E 9 Stability Indicator E 5 E 8 E 10 E 11 E 13 T Temperature of the Material E 15 temperature of the material E 17 Transducer E 7 E 8 E 9 E 14 E 15 transducer E 1 E 2 E 7 E 8 E 9 E 10 E 11 E 13 E 14 E 15 E 16 E 17 U ultrasonic sound waves E 7 E 8 V vertical bars E 5 W wearface E 7 E 8 E 9...

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