Time TT100 Manual

MANUAL

ULTRASONIC THICKNESS GAUGE

TT-100

CV05-047 PARTNERS IN PRECISION

CV Instruments Europe BV

Manual TT-100 1

CONTENTS

1. General 21.1 Scope of applications 21.2 Basic working principle 21.3 Basic configuration and part description 21.4 Performance parameters 31.5 Main Functions 3

2. Measurement steps 42.1 Preparations for measurement 42.2 Adjustment of sound velocity 52.3 Calibration 52.4 Calibration to a known velocity 52.5 Calibration to a known thickness 6

3. Memory of thickness value 73.1 Thickness memory state 73.2 Reviewing the thickness memory units 7

4. Maintenance 84.1 Low voltage indication / battery replacement 84.2 Precautions 8

5. Table of sound velocities of various materials 9


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1. GENERAL

1.1 SCOPE OF APPLICATIONS

The handheld microprocessor-controlled thickness gauge is designed for measuring the thickness ofmetals and non-metallic materials e.g. aluminium, titanium, plastics, ceramics, glass and any othergood ultrasonic wave-conductor as far as it has two parallel surfaces on the top and bottom.The DELTA TT100 can be used in industrial applications to perform precise measurements on various kinds of new materials, parts and components, and it can also be used to monitor variouskinds of pipes and pressure vessels for the decrease of their thickness due to corrosion and/or erosion.

1.2 BASIC WORKING PRINCIPLE

The principle of ultrasonic wave in the thickness measurement is simular to that of optical wave.The ultrasonic wave pulses transmitted by the probe reach the object to be measured and propagate in the object and when they reach the interfaces, they are reflected back. The thicknessof the object is determined by precisely measuring the time the ultrasonic wave travels in theobject.

1.3 BASIC CONFIGURATION AND PART DESCRIPTION OF THE TESTING METER

Basic configuration: tester: 1 pieceDISPLAY: batt 888.8probe: 1 piecem/s mmcoupling agent: 1 bottle

LCD screen display: BATT : low voltage indication: coupling indication for satisfactory acoustic coupling between probe and test piece

m / s : measurement unit of sound velocitym m : measurement unit of thickness

Keyboard: ON: power keyZERO : probe zero procedureVEL : sound velocity value / 5 velocities are stored

: adjustment keys for sound velocity, thickness,10 memory units for thickness


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1.4 PERFORMANCE PARAMETERS

Display type : 4-digit LCDMinimum display unit : 0.1 mmMeasuring range : 1.0 mm - 225.0 mm in steel (with standard probe)

(other maximum values depending on material)Lower limit for steel pipes : minimum dia. 20 mm x 3 mm thicknessDisplay accuracy : 1% H + 0,1mmSound velocity range : 1000 - 9999 m/sCoupling check : satisfactory / no probe couplingOperating temperature : 0 - 40 degrees CWorking frequency : 5 MHzUpdate rate : 4 HzPower supply : 2 AA alkaline cells 1.5 VBattery life : 250 hours with one battery setDimensions : 126 x 68 x 23 mm

1.5 MAIN FUNCTIONS

1) Automatic probe zero adjustment: automatic correction to the system errors.2) Automatic linear compensation within the full range, computer software is used

to correct the non-linear errors of the probe for the purpose of improving the accuracy.3) Keys are used for fast adjustment of sound velocity and thickness as well

as fast checking the thickness memory unit.4) Calibration to known sound velocity.5) Calibration to a known thickness (the sound velocity can be directly determined

according to a known thickness, avoiding the trouble of looking into tables.6) Ten different thickness values can be stored and held after switch-off.7) Coupling indication: the stability can tell if the coupling is normal.8) Sound velocity of five different materials can be stored.9) Indication at low voltage.10) Automatic switch off.11) Oil proof keyboard with longer service life.


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2. MEASURING STEPS

2.1 PREPARATIONS FOR MEASUREMENT

Connect the probe sockets to the connectors on top of of the unit. Connect the transmitting socket(colour = red) at the connector positioned at right, and the receiving socket (no colour) to the connection position left, holding the testerdisplay in front.

- Push ON-key to turn on the unit.

As it is shown in the figures below, after the full screen display for a few seconds, the screen will display the sound velocity used the last time. The measurement can start now, but read other paragraphs first.

BATT888.8 >> 5900m/s mm m/s

Note: The surface of the probe is made of propylene resin and is very sensitive to heavy scratches onrough surfaces, so in application, push the probe gently on the surface.

Automatic turn offIf within 2 minutes no operation is performed, the unit turns off automatically.

2.2 THE ADJUSTMENT OF SOUND VELOCITY

If the screen currently displays the thickness value, then push the VEL-key to enter into sound veloci-ty state. The screen will display the content of the current memory unit of sound velocity. Each timethe VEL-key is pushed the sound velocity memory unit will change. Five different sound velocity val-ues will be displayed in turn.

If the current displayed sound velocity is desired to be changed, the key can be used to adjust thedisplay to the desired value. This value will be stored automatically as one out of five stored velocities.

5900 > > 6368m/s m/s


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2.3 CALIBRATION

Each time the probe or battery is changed, calibration should be performed.This step is rather critical for the guarantee of the measuring accuracy. If necessary, calibration can be repeated several times. Take following steps:

- Put a little coupling agent on the steel master testing block on the unit, whichhas a thickness of 4.0 mm.

- Adjust the sound velocity to 5900 m/s (steel) using the VEL-key and the keys- Push ZERO key to enter into the state of calibration and then the screen displays:

- - - - -

- Coupling the probe with the testing block. At this time the bar lines displayedon the screen will disappear one after the other until the screen displays 4.0 mm.This indicates that the calibration is over:

- - - - > - - - > - - > - > > 4.0m m

2.4 CALIBRATION TO A KNOWN VELOCITY: THICKNESS MEASUREMENT

- Put the coupling agent on the place to be measured.- Adjust the sound velocity depending on the material (see table in back).

(If it is not clear that the right sound velocity should be, for example when the material is unknown or readings are not correct at a certain velocity,then first read paragraph 2.5).

- Couple the probe with the material to be measured.- The measurement can thus start. The screen will display the thickness

of the material to be measured, for example:

16.7mm

Note: the probe couples with the material to be measured, the coupling indication sign will be displayedon the left side at the display. If the coupling indication flicks or does not appear, it shows that thecoupling is not well done.Take the probe away, the thickness value will remain and coupling indi-cation will disappear.


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2.5 CALIBRATION TO A KNOWN THICKNESS: SOUND VELOCITY MEASUREMENT

If it’s desired to measure the sound velocity of a certain material, a testing blockwith a known thickness must be used to measure the sound velocity as follows:- Use a vernier caliper or micrometer to measure the test piece thickness.- Couple the probe with coupling agent with the test piece with the known

thickness until a (wrong) thickness value is displayed:16.7mm

- Remove the probe.- Use keys to adjust the displayed thickness value to the actual known

thickness of the testing block, for example 25.0 mm:16.7 keys > 25.0 m m m m

- Now push the VEL-key. The correct sound velocity for this material will bedisplayed and at the same time this sound velocity will be stored in the current sound velocity memory unit:25.0 > VEL-key > 6368m m m/s

- Start new thickness measurements on the same material with this velocity.


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3. MEMORY OF THICKNESS VALUE

3.1 THICKNESS MEMORY STATE

- Set the right sound velocity for a new measurement (see chapter 2).- Push and hold the VEL-key and then push the ZERO-key to enter into

the thickness memory state.- The display will now show a memory unit of a certain thickness: Unit1 up to 9.- Use the upper and down keys to look for the required unit:

U1 > U2 > U3 >.......> U9- While measuring the thickness, the value measured will be stored in the chosen unit

automatically. Each time a new value is measured, the old value in this unit will be automatically replaced.U1 > > 3.0

mm- Push the VEL-key once more to leave the thickness memory state.

3.2 REVIEWING THE THICKNESS MEMORY UNITS

- Push and hold the VEL-key and then push the ZERO-key to enter thethickness memory.- The display will now show a memory unit of a certain thickness: Unit 1up to Unit 9.- Use the upper and down keys to look for the required unit: U1 > U2 > U3 > .......> U9- Again press and hold the VEL-key and press ZERO-key to show the stored reading:

U1 > VEL + ZERO > 3.0mm

- Push the VEL-key to leave the thickness memory state.


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4. MAINTENANCE

4.1 LOW VOLTAGE INDICATION

If Batt is displayed on the screen, it shows that the battery voltage is running low and the batteriesshould be replaced in time before the unit can be used again.

Battery replacement:a) Wait until the unit turns off automatically.b) Open the battery compartment (use the thumb to press down the compartment

cover and slide it out).c) Remove the used batteries and put in new batteries. Note the polarity

of the battery.

4.2 PRECAUTIONS

- The surface of the probe is made of propylene resin and is very sensitive to heavy scratches on rough surfaces, so in application, push the probe gently on the surface.

- The temperature of the surface of the object to be measured should not exceed60 degrees C, otherwise the probe will not be workable.

- Dust, iron chips and carbon particles will cause trouble; keep unit clean all the time.- Grease, oil and dust will make the cable of the probe aged and cracked,

therefore, after the use, the cable should be cleaned of dust and dirt.- If the unit is not to be used for a long time, remove the batteries.- Stricktly avoid any collision or damp environment, etc.


Manual TT-100 9

5. TABLE OF SOUND VELOCITY OF VARIOUS MATERIALS

Material Sound velocity (m/s)aluminium 6260zinc 4170silver 3600gold 3240tin 3230iron 5900brass 4640copper 4700SUS 5790propylene resin 2730water at 20 degrees C 1480glycerine 1920water glass 2350


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Manual TT-100 11


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MANUAL

ULTRASONIC THICKNESS GAUGE

TT-100

CV05-047 PARTNERS IN PRECISION

Time TT100 Manual

Documents

Transcript of Time TT100 Manual