KERN & SOHN TU 300-0.01US User Manual

Sauter GmbH
Ziegelei 1
TU_US
D-72336 Balingen E-Mail: info@sauter.eu
Instruction Manual
DIGITAL ULTRASONIC THICKNESS GAUGE
Model: TU-US
Table of contents
1. Overview
1.1 Product specifications
1.2 Main functions
1.3 Measuring principle
1.4 Configuration
1.5 Operating conditions
2. Structure feature
2.1 Instrument appearance
2.2 Parts of the main body
2.3 Measurement screen
2.4 Keypad definition
3. Preparation
3.1 Transducer selection
3.2 Conditions and preparation of surfaces
4. Operation
4.1 Power on/ off
4.2 Transducer Set
4.3 Zero adjustment
4.4 Sound velocity calibration
4.5 How to perform measurements
4.6 Two- Point Calibration
4.7 Scan Mode
4.8 Limit set
4.9 Changing Resolution
4.10 Unit scale
4.11 Memory management
4.12 Data printing
4.13 System set
4.14 System information
4.15 EL Backlight
4.16 Battery information
4.17 Auto Power Off
4.18 System reset
4.19 Connection to PC
5. Menu operation
5.1 Enter the main menu
5.2 Enter the submenu
5.3 Change the parameter
5.4 Numeric digit input
5.5 Save and exit
5.6 Cancel and exit
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6. Servicing
7. Transport and storage Appendix A Sound velocities Appendix B Application notes
8. Declaration of conformity
1. Overview
The Model TU-US is a digital ultrasonic thickness gauge. Based on the operating principles as SONAR, it is capable of measuring the thickness of various materials with an accuracy as high as 0.01 mm (or 0.001 inches). It is suitable for a variety of metallic and non-metallic materials.
1.1 Product Specifications
Display: 128 x 64 dot matrix LCD with EL backlight
Measuring range: 0.75 to 300mm (in steel)
- TU 80-0.01, TU 230-0.01 US, as well as TU 300-0.01 are measuring continuously with a resolution of 0.01
Sound velocity range: 1000 to 9999m/s
Resolution: 0.1/0.01mm (selectable)
Accuracy: ± (0.5% thickness +0.04) mm, depending on material and conditions
Units: Metric/ Imperial units selectable
- Four measurements readings per second at single point measurement and ten per second at Scan Mode.
- Memory up to 20 files (up to 99 values for each file) of stored values
- Upper and lower limit can be preset. It will alarm automatically if the result value exceeds the limit.
- Case: Extruded aluminium body suitable for use under Poor working conditions
Power supply: 2x AA, 1.5V alkaline batteries Typical operating time: about 100 hours (EL backlight off)
Transfer to PC: RS-232 serial port
Dimensions: 132 x 76.2 mm
Weight: 345g
1.2 Main functions
- Capable of performing measurements on a wide range of materials including metals, plastic,
TU_US-BA-e-1212 1
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TU_US
2
tv
H
×
=
No.
Item
Quan-
Note 3
Couplant
1
10
Transducer: N07
11
Transducer: HT5
12
Mini thermal
1
14
DataPro for
1
For use 15
Communication
1
8. Enter
MiTech Inc. Ltd
5. Switch Selection
6. Save/Delete
7. Exit
3
MiTec h
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
- “Auto sleep” and “Auto power off” function to
- Optional thermal mini- printer to print the measured data via RS-232 port.
1.3 Measuring principle
The digital ultrasonic thickness gauge determines the thickness of a part or a structure by accurately measuring The time required for a short ultrasonic pulse generated by a transducer to travel through the thickness of the material, to reflect from the back or ins ide surface and be returned to the transducer. The measured two-way transit time is devided by two to account for the down-and-back travel path, and then multiplied by the veloc ity of sound in the material. The result is expressed in following relationship:
Where: H ----˃ thickness of the test piece v ----˃ sound velocity in the material t ----˃ the measured round-trip transit time
1.4 Configuration
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ceramics, epoxies, glass and other ultrasonic wave well- conductive materials.
- Four transducer models are available for special applications included coarse grain material and high temperature applications.
- Zero adjustment function
- Sound velocity calibration function
- Two- point calibrat i on functi on
- Two measurement modes: Single point mode
Scan mode
- Coupling status indicator showing the coupling status
- Battery indication indicates the rest capacity of the battery
conserve battery’s life Optional software to transfer the m emory data to PC
tity Stan­dard Con-
1 Main body 1 2 Transducer 1 Model:
N05/90° figu­ration
4 Instrument Case 1 5 Operating
1
Manual 6 Screwdriver 1 7 Alkaline battery 2 AA size 8
Optio­nal
9 Transducer: N02 See
Table3-1 Con­figu­ration
printer
13 Print cable 1
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Thickness Gauge
Cable
1.5 Operation conditions
Temperature: -20°C up to +60°C
Storage temperature: -30°C up to 70°C
Relative humidity: ≤ 90%
In the surrounding environment any kind of vibrations should be avoided, as well as magnetic fields, corrosive medium and heavy dust.
2. Structure feature
2.1 Instrument appearance
1 Main body 2 Transducer
MT200
1
2
MiTec h
2.2 Parts of the main body
1 Communication Socket 2 Alumi nium case 3 Belt hole 4 Battery cover 5 Keypad 6 LCD Display 7 Socket of transducer (no polarity) 8 Control plate (inbuilt) 9 Alumi nium case 10 Label
on the PC
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Turn the and off
Exit from selection
Turn on/off the
Enter
Probe Zero
Plus or scroll
Switch selection
Minus or
Data Save or
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2.3 Measurement screen
Operating Hint
Coupling Status
File Name
Record No./count
Battery Information: Displays the information of the rest capacity of battery Coupling status: Indicates the coupling status. While measurements are performed, this symbol should be on. If it isn’t, the instrument is having difficulties in achieving a stable measurement and the thickness value displayed will m ost likely be erroneous. Operating hint: Shows 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: Indicates that the current thickness measurement Mode is Scan mode, not Single point mode.
File name: current file name is shown Record No./ Count: The current record number is indicated while this item is highlighted or the total record counts while it isn’t highlighted. Transducer Model: Current transducer model setting in the instrument Sound velocity: Current sound velocity setting Thickness reading: The present Single time measured value is displayed. ↑ means that the upper measuring limit
is exceeded. ↓ means that the value is lower than bottom
measuring limit.
Units label: If the mm symbol is on, the instrument is displaying the thickness value in millimetres and the sound velocity in m/s. If the in symbol is on, the instrument is displaying the thickness value in inches and the sound velocity in inch/us.
ThicknesReading
Battery
Units La bel
Sound Velocity
Transducer Model
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2.4 Keypad definitions
inst rument on
EL backlight
operation
among items
Data Delete
3. Preparation
3.1 Transducer Selection
With this instrument it is possible to measure a wide range of different materials, started from various m etals to glass and plastics. These different types of material require the usage of different transducers. Choosing the correct transducer is the most important thing to perf orm accurate and reliable measurements. Generally speaking, the best transducer for an operation is the one t hat sends s ufficient ultrasonic energy into the material t o be measured in the way that a strong, stable echo is to be received in the instrument. There are several factors that affect the strength of the traveling ultrasound. They are described as followed:
Initial signal strength: The stronger a signal is at the beginning, the stronger its echo will return. Initial signal strength is mainly a factor of the size of the ultrasound emitter in the transducer. A large em itting area will send more energy into the material being measured than a small one. Thus, a so-called “1/2 inch” transducer will emit a stronger signal than a “1/4 inch” transducer.
Absorption and scattering: As the ultrasound travels through a material, it is partly absorbed. If the material has got any grain structure, the sound waves will start scattering. Both of these effects reduce the strength of the waves and thus the instrument’s ability to detect the returning echo. Ultrasound of higher frequency is absorbed and scattered more than ultrasound of lower frequency. While it may seem that using a lower frequency transducer is better in every instance, it should be mentioned that low frequencies are less directional than higher ones. Thus, a higher frequency transducer is a better choice for detecting the exact location of small pits or flaws in the material to be measured.
Geometry of the transducer: The physical constraints of the environment sometimes determine a transducer’s suitability for an operat ion. Som e transducers are simply too large to be used in a c onfined area. If the available surface area for contact ing with the transducer is limited, the usage of a transducer with a small surface is required.
current
up
scroll down
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Cast iron
or highly N05 5 10
1.2mm~230.0
Φ20mm×
normal
N05
5
10
1.2mm
Φ20mm×
normal
HT5 5 14
3
mm
30
For high tem-
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Measurements on a curved surface, in example an engine cylinder wall, will require a transducer with an adapted surface.
Temperature of the material: If exceedingly hot surfaces are to be measured, high temperature transducers must be used. These transducers are built with special materials and techniques that allow them to withstand high temperatures without being damaged. Additionally, care must be taken if a “Zero adjustment” or a “Calibration to known thickness” is being performed with a high temperature transducer. The sel ection of a proper transducer is often a matter of tradeoffs between various characteristics. Somet imes it is necessary to experience with a variety of transducers in order to find the one that works well for a special operation. The transducer is the “business end” of the instrument. It transmits and receives ultrasonic sound waves which the instrument uses to c alculate the thickness of the m aterial being measured. The transducer is connected to the instrument via the attached cable and two coaxial connectors. The transducer has to be inst alled correctly to get reliable measurement results. Each plug must be fit into the adequate socket in the instrument. Below there are shown two photos and a short description of the instruction use of a transducer.
The upper figure is a bottom view of a typical transducer. The two semicircles are visibly separated in the middle of the surface. One of the semicircles is conducting the echoed sound back into the transducer. When the transducer is placed against the material being m easured, this is the area directly beneath the centre of the measured surface. The below figure is a top view of a typical transducer. It is pressed against the top with t he thumb or the index finger to hold the transducer in place. Only moderate pressure is sufficient to keep it stationary. Its surface must be placed flat against the surface of the material.
Table 3-1 Transducer selection
Mo-
Freq
Dia
Measurement
del
MHZ
metr
range
mm
N02 2 22 3.0mm~300.0
mm(in steel 40mm(grey
HT200)
mm (in steel)
Lower limit
20 For thick,high-
3.0mm
Description
ly attenuating
scattering materials
measurement
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230.0
/90° N07 7 6 0.75mm~80.0
3.2 Conditions and preparation of surfaces
At any kind of ultrasonic measurement, the shape and roughness of the surface being tested are of paramount importance. Rough and uneven surfaces may limit the penetration of the ultrasound through the m aterial resulted by an unstable and therefore unreliable measurement. The surface being measured should be cl ean and free of any small particulate matter, rust or scale. The transducer must be placed on a flat and even surface. To get it clean it might be helpful to use a wire brush or a scraper. In more extreme cases, rotary sanders or grinding wheels may be used. Care must be taken to prevent surface gouging which inhibits a proper transducer coupling. Extremely rough surfaces such as the pebble-li ke finish of cast iron will be measured quite com plicated. These kinds of surfaces comport to the sound beam like frosted glass on light: the beam becomes diffused and scattered in all directions. In addition to this, rough surf ac es account for an excessive wear of the transducer, especially when it is “scrubbed” along the surface. Transducers should be inspect ed time by time if there are any signs of abrasion. If the transducer is worn off on one side more than on the other, the sound beam penetrating the tes t material may no longer be perpendicular to the surface of the mat erial. In this case, it is difficult to exactly locate tiny irregularities in the material, as the focus of the sound beam no longer lies directly beneath the transducer.
4. Operation
4.1 Power on/ off
The instrument is turned on by pressing the If the instrument is initially turned on, the model type, the manufacturer information and the serial number will be displayed before entering the main measurement screen.
It is turned off by pressing the The instrument has got a special memory where all settings are stored even if it was powered off.
4.2 Transducer Set
The model of the transducer should be preset to the instrument before measurements are to be started. This
mm(Stahl
mm (in steel
200
(Stahl)
3.0mm Φ15mm×
2.0mm
key.
measurement For thin pipe wall or small curvative pipe wall
perature (lower than 300°C) measurement
key.
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enables the user to select the transducer type among supported transducers according to frequency and diameter depending on application requirements. The following steps are to be used to select the applicable transducer model:
1) On the measurement screen, the pressed multiple times to activate the Transducer modeltab.
2) The to the desired transducer model.
3) The The transducer model set can also be changed by menu operation. For this, please refer to chapter 5.
4.3 Zero adjustment
The same way as a mechanical micrometer is zeroed. If the instrument isn’t zeroed correctly, all the measurements taken may be in error by an initial ly incorrect value. W hen the instrument is zeroed, this fixed error value is measured and automatically corrected for all subsequent measurements. The instrument is “zeroed” as follows:
1) The instrument has to be powered on and the T wo -point calibration function is OFF. The Zero adjustment is disabled in Two-point calibration mode.
2) The transducer had to be plugged i n and it has to be made sure that the connectors are fully engaged. The surface of the transducer has to be checked: it has to be clean and free of any debris.
3) The model of the transducer set in the instrument has to be changed to the model currently used.
4) A single droplet of ultrasonic couplant is to be appl ied to the metallic control plate.
5) The transducer has to be pressed flat against the surface of the control plate.
6) While the transducer is firmly coupled to the control plate, the
display “ZER” on the operating hint area while it is calculating its Zero point.
7) After “ZER” disappears, the transducer has to be removed from the control plate.
At this point, the instrument has successfully calculated its internal error factor and will compensate for this value in all following measurements. When performing a “Zero adjustment”, the inst rument will always use the sound velocity value of the in-built control plate, even if any other velocity value has been entered for making actual measurements. Though the last “Zero adjustment” will be stored it is generally recommended to perform a “Zero adjustment” whenever the instrument is turned on as well as, if a different transducer is used. This way it is ens ured that the instrument has been zeroed correctly.
and the key have to be pressed to switch
key has to be pressed to exit.
key is used to „zero“t he instrument. It is just the
key has to be pressed. The instrument will
key has to be
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The
key has to be pressed and the Zero adjustment is terminated. The instrument returns to the measurement mode.
4.4 Sound velocity
In order to performing accurate measurements, the instrument must be set to the correct sound velocity of the material being measured. Diff erent types of material have got different inherent sound velocities. If the instrument isn’t set to the correct sound velocity, all the measurements will be deficient by some fixed percentage. The One-point calibration is the simplest and most comm only used calibration procedure, optim izing linearity over large ranges. The Two-point calibration has got higher accuracy over small ranges by calculating the Zero adjustment and sound velocity. Note: One- and Two-point calibrations should only be performed on material where the paint or the coating is removed; if not, it will result in a multi material velocity calculation which is surely deviating from the actual velocity of the material intended to be measured.
4.4.1 Calibration to a known thickness
1) A Zero adjustment has to be performed.
2) A couplant has to be applied to the sample piece.
3) The transducer has to be press ed against the sample piece, making sure that the transducer is placed flat on it. The display should show a thickness value and the coupling status indicator should appear.
4) As soon as a stable reading has been achieved, the transducer has to be removed. If the displayed thickness Is different from the value shown while the trans ducer was coupled, step 3 has to be repeated.
5)The displayed thickness up or down unt il the thickness of the sample piec e is matched.
6) The value, which has been calculated before based on the thickness value that was entered, is displayed.
7) The mode. Now, measurements can be performed.
4.4.2 Calibration to a known velocity
Note: This procedure requires that the sound velocity of the material being measured, is k nown. A table of the most common materials and their sound velocit ies can be found in Appendix A of this manual.
1. The the sound velocity item.
2. The preset commonly used velocities. The preset sound
and t he key has to be used to adjust the
key has to be pressed and the s ound velocity
key hast to be pressed to exit the cal ibration
key has to be pressed multiple times to tab to
key has to be pressed to switch among the
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velocity value can be overwritten, if ess ential, up or down with the keys
material to be measured is m atched. This value may be above or below the preset sound velocity for a special material (see table in Appendix A).
3. The calibration mode. The instrument is now ready to perform measurements. Another method to set the instrument with a k nown sound velocity is as follows:
1) The submenu item Test Set】 ->Velocity Sethas to be highlighted and the
the sound velocity set screen.
2) The the numeric digit to be changed. The
to be used to increase/ decrease numeric values on t he display until the sound velocity of the material being measured is matched. An auto repeat funct ion is built in, so that when the key is held down, numeric values will increment/ decrement at an increasing rate.
3) The hast to be pressed to cancel the calibration.
To achieve the most accurate measurement results, it is generally advisable to calibrate the ins trument t o a sample piece of known thickness. The composition of materials (and thus, its sound velocity) sometimes varies from lot to lot and from manufacturer to manufacturer. Calibration to a sample of known thickness ens ures that the instrument is set as closely as possible to the sound velocity of the material being measured.
4.5 How to perform measurements
The instrument always stored the last measured value unt i l a new measurement is made. In order for the trans ducer working in the right way there may not be any gaps between the contact area of the sensor and the surf ace of the material being measured. This is accomplished with the coupling fluid, commonly called “couplant”. This fluid serves to “couple” or transfer the ultrasonic sound waves from the transducer, into the material and back again. Therefore a small amount of couplant should be applied onto the surface of the material, before measurements are performed. Typically, a single droplet is sufficient. After the couplant is applied, the transducer has to be pressed firmly against the area being measured. The coupling status indicator should appear on the display as well as a digit number. If the instrument has been “zeroed” properly and if it has been set to the correct sound velocity, the actual thickness of the material directly beneath the transducer will be indicated as a number in the display. If the coupling status indicator doesn’t appear or if it isn’t stable or if the numbers on the display doesn’t seem to be correct, it has to be checked whether there is an adequate
and until the sound velocity of the
key has to be pressed to exit from the
key has to be pres sed to enter
key has to be pressed multiple t imes to tab to
/ keys have
key has to be pressed t o conf irm or t he key
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film of couplant beneath the transducer and whether the transducer is placed flat onto the material. If conditions persist, sometimes it is necessary to select a different transducer (size or frequency) for the material intended to be measured. While the transducer is in contact with the material, the instrument will perform four measurements every s econd, updating its display as it does so. If the transducer is removed, the display will hold t he last measurement performed. Note: Occasionall y a small film of couplant will be drawn out between the transducer and the surface, as the transducer is removed. If this happens, the instrument may perform a measurement through this couplant film, resulting in an erroneously measurement. This is comprehensible because one thickness value is observed while the transducer is in place and the other value is observed after the transducer is removed. In addition, measurements performed through very thick paint or coatings may result i n the paint or coating being measured rather than the material intended. The responsibility for a proper use of the instrument, as well as the recognition of these types of phenomenon solely depend on the user of this instrument.
4.6 Two-point Calibration
Note: This procedure requires that the testing person has got two known thickness points on the test piece which are representative of the range being measured.
1) On the Test Set】 ->2-Point Calsubm enu item the
key has to be pressed to switch ON the Two-point mode. The exit from the menu to the measurement screen. The string “DPC” will appear on the operation hint area of the main measurement screen.
2) The procedure. The stri ng “NO1” will appear on the operating hint area, indicating measuring the first point.
3) A small amount of couplant has to be applied to the sample piec e.
4) The transducer has to be press ed against the sample piece at the first / second calibration point. It has to be made sure that the transducer is placed flat on the surface of the sample. Now the display should show any (probably incorrect) thickness value and the c oupli ng stat us indic ator should appear steadily.
5) As soon as a stable measurement is achieved, the transducer is to be removed. If the displayed thickness distinguishes from the value shown while the transducer was coupled, step 4 is to be repeated.
6) The material thickness up and down until it matches the material thickness of the sample piece.
7) The change to “NO2” indicating to be ready to measure the second calibration point.
key has to be pressed to start the calibration
and the key are to be used to adjust the
k ey has to be pressed to confirm. The hint will
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8) Steps 3 to 7 are to be repeat ed. The hint will change back to “DPC”. The instrument is now ready to perform measurements within its range.
4.7 Scan mode
While the instrument excels in making single point measurements, it is sometimes necessary to examine a larger region, searching for the thinnest point. This instrument includes a feature, called SCAN- Mode, which allows to do just that. During normal operation, it performs and displays four measurements every second which is adequate for single measurements. In SCAN- Mode, however, the instrument performs ten measurements every second and displays the readings while scanning. While the transducer is in contact with the material to be measured, it is always keeping track to finding the lowest measurements. The transducer may be “scrubbed” across the surface, any brief interruptions of the signal will be ignored. If it looses contact with the surface for more than two seconds, the instrument will display the smallest measurement it found.
On the T est Set】 ->Work modemenu item the key has to be pressed to toggle between single point mode and scan mode.
4.8 Limit set
With the Limit s et f eature the user is able to set an audible and visual parameter while taking measurements. If a measurement is beyond the limit range, set by the user, the beeper will sound, if enabled. With this, the speed and efficiency of the inspection process is improved by elimination of constant viewing of the actual reading displayed. In the section below it is desc ribed how to set up this feature:
1) On the T es t Set】 ->Tolerance Limit menu item the key has to be pressed to activate the limit set screen.
2) The
change the bottom limit and the upper limit value to the desired values.
3) The
and to return to the previous screen, or the be pressed to cancel the change. If the measurement range is exceeded, the user will be reminded to re-set. If the bottom limit is larger than the upper limit, the values will be exchanged automatically.
4.9 Changing resolution
The instrument has got a selectable display resolution, which is 0.1 and 0.01mm.
On the T est Set】 ->Resolutionmenu item the has to be pressed to switch between “high” and “low”.
key, the and key are to be used to
key has to be pres sed to confirm the change
key has to
key
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4.10 Unit scale
On the T est Se t】 ->Unit menu item the to be pressed to switch back and forth between imperial and metric units.
4.11 Memory management
4.11.1 Storing a reading
There are 20 files (F00-F19) which c an be used to store the measurement values inside the instrument. At most 99 records can be stored in each file. The following steps outline how to do this:
1) The File Nameitem on the main measurement screen.
2) The file to save the data.
3) After a new measurement reading appears, the has to be pressed to save the measurement value to the current file. If the Auto Save funct ion is activated, the measurement value will be automatically saved to the current file after a new measurement operation.
4.11.2 Viewing a stored reading
The Record No area on the measurement screen is
highlighted. The the record number. The stored values, according to the record number from the memory, will be automatically read. They are displayed on the “Thickness reading” area of the screen simultaneously. If the displayed record data shall be deleted from the
memory, the The other way to view the stored record is by menu operations. On the Memory Manager】 ->View Mem
Datam enu the memory viewing screen.
↓F07 00 0%
key has to be pressed to activate the
and key are to be used to select the desired
key has to be pressed multiple times until the
and key are to be used to change
key has to be pressed.
k ey has to be pressed to activate the
F00 05 5%
F01 00 0%
F02 00 0%
F03 00 0%
F04 00 0%
F05 00 0%
F06 00 0%
key has
key
files, including the file name, the record counts and the ratio used of the file can be showed on one screen. Use the
/ key to
scroll up/down. Press
exit browsing. Press
to
to
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that file.
4.00 5.01 6.01
F00 05 5%
F01 00 0% F02 00 0% F03 00 0% F04 00 0% F05 00 0% F06 00 0% F07 00 0%
The and key are to be used to move the curser to the line which you want to see details. The
be pressed to see the details of that file.
7.00 8.01
This screen displays the total five record data in the file F00.
4.11.3 Clearing selected files
The Memory Managementmenu screen has to be entered and the Delete by Filemenu item has to be
highlighted. Then the function allows the user to delet e the selected data files previously saved in memory.
4.11.4 Clearing all the files
The Memory Managementmenu screen has to be entered and the Delete all Datamenu item has to be
highlighted. Then the operation all the measurement data stored in the memory will be deleted after confirmation.
4.12 Data printing
Before printing, one connection plug of the print cable (optional parts) has to be inserted into t he socket on the up-left of the main body and the other plug into the communication socket of the mini-printer.
4.12.1 Print current file
The Print functionmenu screen has to be entered and the Print current menu item has to be highlight ed.
Then the send all data of the current file to the mini printer via RS-232 port and print them out.
4.12.2 Print selected file
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key has to
key has to be pressed. This
key has to be pressed. With this
key has to be pres sed. This operation will
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The Print functionmenu screen has to be entered and the Print Mem ory menu item has to be highlighted.
Then the start file name and the end file name, the instrument will send all the data in the files specified to print out.
4.12.3
The Print functionmenu screen has to be entered and the Print all M em m enu item has to be highlight ed.
Then the send all the memory data to the mini printer t o print them out.
4.13 System Set
The item and enter this submenu from the main menu.
1) When Auto save i s set to <On>, the m easured data are automatically stored to the current file.
2) When Key sound is set to <On>, the buzzer will make a short hoot every time if any key is pressed.
3) When Warn sound is set to <On>, if t he measured value exceeds the limit, the buzzer will make a long hoot.
4) LCD Brightness Set: The the System set 】 ->LCD Brightness menu item to
enter the LCD Brightness screen. enhance , and The or the
4.14 System information
This System information function will display the information about the main body and the firm ware. The version will change with the firmware.
4.15 EL Backlight
With the background light, it is convenient to work in even dark condition. The
or off the background light any mom ent it is needed after having powered on the instrument. As the EL light will consume much power it only h as to be turned on if necessary.
4.16 Battery information
Two AA size alkaline batteries are needed as power source. After several hours’ usage of the preset batteries,
the battery symbol on the screen will be shown as If battery capacity runs out, the battery symbol
be shown and it will begin to flash. In this case, the batteries should be replaced. If the instrument isn’t used for a longer period, the batteries have to be removed.
key has to be pressed. After speci fying the
key has to be pres sed. This operation will
key has to be pressed on the System s et menu
key has to be pressed on
has to be pressed to
to weaken the brightness.
key has to be pressed t o confirm the m odification,
key has to be pressed to can cel it
key has to be pressed to s witch on
.
will
Sauter GmbH
TU_US
+
-
+
-
Cat
Anod
MiTec
MT200
Procedure:
The Main Display Interface
Test Set
Print Current
Print All Mem
View Mem Data
4.17 Auto Power off
The instrument features an “auto power off” function designed to conserve battery life. I f it is not in use for 5 minutes or more, it will turn its elf off. If the voltage of the battery is too low this function will also work.
4.18 System reset
The instrument: factory defaults will be restored. All the memory data will be cl eared during system reset. The only time this might be helpful is if the parameter in the instrument was somehow corrupted.
4.19 Connection to PC
This instrument is equipped with a RS-232serial port. Using the accessory cable, the instrument has got the ability to connect to a PC or an external storage device. Measurement data stored in the memory can be transferred to the PC through the RS-232 port. For detailed information of the communication software and its usage, refer to the software manual.
5. Menu operation
Both, presetting system parameters and the additional function are verified by menu operation. On the
measurement sc reen, the into the main menu.
TU_US-BA-e-1212 9
Instruction Manual
1 Power Off the instrument 2 Take 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.
key has to be pressed while powering on the
key has to be pressed to get
Ziegelei 1 D-72336 Balingen E-Mail: info@sauter.eu
5.1 Enter the main menu
To enter the main m enu, t he key activate the menu items tab while being on the measurement screen. To turn back to t he previous s creen,
the key
5.2 Enter the Sub menu
The screen while the submenu item is selected.
5.3 Change the parameter
The parameter while the item is selected on the parameter set screen.
5.4 Numeric di git in put
The numeric digit to be changed; the numeric values on the
display can be decreased/ increased with the key until the desired value is matched.
5.5 Save and exit
The and to return back to the previous screen.
5.6 Cancel and exit
The return back to the previous screen.
6. Servicing
Tel: +49-[0]7433- 9933-199 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com
Work mode 2-Point Cal Velocity Set Probe Set Tolerance Limit Resolution Unit
Print Memory Print Set Memory Manager System Set System Info
Delete by File
Delete all Data
Auto Save
Key Sound
Warn Sound
LCD Brightness
has to be pressed to
has to be pressed again.
key has to be pressed to enter the submenu
key has to be pressed to change the value of a
key has to be pressed multiple times to tab to t he
and
key has to be pressed to confirm the m odificati on
key has to be pressed to c ancel the change and
Sauter GmbH
Ziegelei 1
TU_US
Material
Sound Velocity
In/us
m/s
Aluminum
0.250
6340-6400
0.233
0.226
0.173
0.094
0.105
0.142
0.128
0.164
0.236
0.117
0.100
0.106
0.092
0.230
0.094
0.222
0.091
0.056
0.058
D-72336 Balingen E-Mail: info@sauter.eu
Instruction Manual
If there should appear some abnormal phenomena to the instrument, please do not dismantle or adjust any fixed assembly parts on your own. Inst ead of this, the present warranty card has to be filled out and the i nstrument has to be sent to us. The warranty service can be carried on.
7. Transport and Storage
The instrument has to be kept away from vibration, strong magnetic fields, corrosive medium, dumpiness or dust. Storage in ordinary temperature.
Appendix A Sound velocities
Steel, common
Steel, stainless
Brass
Copper
Iron
Cast Iron
Lead Nylon Silver
Gold
Zinc
Titanium
Tin
Epoxy resin
Ice
Nickel
Plexiglass
Polystyrene
Porcelain
PVC
Quartz glass
Rubber, vulcanized
Teflon Water
Appendix B Application Notes Measuring pipe and tubing
When a piece of pipe is measured to determine the thickness of the pipe wall, the orientation of the transducer is of importance. If the diameter of the pipe is larger than approximately 4 inches, measurement should be performed with the transducer orientated in the way that the gap in the surface of the sensor is perpendicular (at right angle) to the long axis of the pipe.
0.186
0.233
0.173-0.229
0.157
0.222
5920 5740 4399 4720 5930
44005820
2400 2680 3607 3251 4170 5990 2960 2540 3988 5639 2692 2337 5842 2388 5639 2311 1422 1473
Tel: +49-[0]7433- 9933-199 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com
For smaller pipe diameters, two measurements should be performed, one with the surface gap of the sensor perpendicular, another with the gap parall elto t he long axis of the pipe. The smaller one of the displayed values s hould be taken as the thickness of that point.
Measuring hot surfaces The sound velocity through a substance i s dependent on its temperature. As materials heat up, the velocity of sound through them decreases. In most applicati ons with s urf ace temperatures of less than 100°C, no special procedures must be observed. At temperatures above that point, the change in sound velocity of the material being measured starts having a noticeable effect upon ultrasonic measurement. At such elevated temperatures it is recommended to first performing a calibration on a sample piece of known thickness, which is at or near the temperature of the material being measured. This will allow the instrument to correctly calculate the sound velocity through the hot material. When performing measurements on hot surfaces, i t may also be necessary to use a specially constructed high­temperature transducer. These transducers are built of materials which can withstand high temperatures. It is also recommended that the sensor has to be left in contact with the surface for a short time in order to aquire a stable measurement. While the transducer is in contact with the hot surface, it will be heated up and with term al expansion and other effects, the accuracy of measurement may adversely be affected.
Measuring laminated materials
Laminated materials are unique because of their density (and therefore sound velocity) may considerabl y vary from one piece to another. Some laminated materials m ay even exhibit noticeable changes in sound velocity across a single surface. The only way to a reliable measurement is to perform a calibration on a sample piece of known thickness. Ideally, this sample material should be a part of the same piece being measured, or at least f rom the s ame lamination batch. The effects of variation of sound velocit y will be minimized by calibrating each test piece individually. An additional important consideration is , that any included air gaps or air pockets will cause an early reflection of the ultrasound beam. This will be noticed as a sudden decrease in thickness in an otherwise regular surface. While this may impede accurate measurement of the t otal material thickness, it does positively indic ate any air gaps in the laminate.
Suitability of materials
Ultrasonic thickness measurement relies on passing a sound wave through the material being measured. Not al l
TU_US-BA-e-1212 10
Sauter GmbH
Ziegelei 1
TU_US
D-72336 Balingen E-Mail: info@sauter.eu
Instruction Manual
materials are suited to transmitting sound. Ultrasonic thickness measurement is practically found in a wide variety of materials including metals, plastic and glass. Materials which are difficult i nclude some cast materials, concrete, wood , fibreglass and some rubber.
Coupling medium
Every ultrasonic application requires some medium to couple the sound from the transducer to the tested material. Typically, a high viscosity liquid is used as the medium. The sound used in ultrasonic thickness measurement doesn’t travel through air efficiently. A wide variety of coupling mediums may be used. Propylene glycol is suitable for mostly all applications. I n difficult applications, where a maximum transfer of sound energy is required, glycerine is recommended. However, on some metals glycerine may promote corrosion by means of water absorption, which is undesirable. Other suitable coupling medium for measurements at normal temperatures may include water, various oils and greases, gels and silicone fluids. Measurements at elevated temperatures will require specially formulated high temperature coupling medium. 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 while being in standard pulse-echo mode. This may result in a thickness reading t hat is TWICE what it should be.
The responsibility of a proper use of the instrument and the recognition of these types of phenom enon solely rest with the user of the instrument.
Tel: +49-[0]7433- 9933-199 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com
7. Declaration of conformity
TU_US-BA-e-1212 11
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