VorTek MT160 Manuel utilisateur
MT160
Ultrasonic Thickness Gauge
Instruction Manual
Document Number 800103
Rev A
8475 W I-25 Frontage Rd
Suite 300
Longmont, CO 80504
(303) 682-9999 (888) 386-7835 Fax (303) 682-4368
http://www.vortekinst.com
MT160 Instruction Manual
800103 1
1 Overview..................................... 3
1.1 Product Specifications .......................................... 3
1.2 Main Functions ..................................................... 4
1.3 Measuring Principle .............................................. 4
1.4 Configuration ........................................................ 5
1.5 Operating Conditions ............................................ 5
2 Features ....................................... 6
2.1 Main Screen .......................................................... 7
2.2 Keypad Definitions ............................................... 8
3 Preparation .................................. 9
3.1 Transducer Selection ............................................. 9
3.2 Condition and Preparation of Surfaces ............... 13
4 Operation................................... 14
4.1 Power On/Off...................................................... 14
4.2 Probe Zero........................................................... 14
4.3 Sound Velocity Calibration ................................. 16
4.4 Making Measurements........................................ 19
4.5 Scan mode........................................................... 23
4.6 Changing Resolution........................................... 25
4.7 Changing Units ................................................... 25
4.8 Memory Management......................................... 25
4.9 Beep Mode .......................................................... 27
4.10 EL Backlight ..................................................... 28
4.11 Battery Information........................................... 28
4.12 Auto Power Off ................................................. 28
4.13 System Reset..................................................... 29
MT160 Instruction Manual
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1 Overview
The model MT160 is a digital ultrasonic thickness gauge.
Based on the same operating principles as SONAR, the instrument
is capable of measuring the thickness of various materials with
accuracy as high as 0.1mm/0.01 millimeters. It is suitable for a
variety of metallic and non-metallic materials.
1.1 Product Specifications
1) Display: 4.5-digit LCD with EL backlight.
2) Measuring Range: (0.75～300) mm (in Steel)
3) Sound Velocity Range: (1000~9999) m/s
4) Resolution: MT160: 0.1mm/0.01mm
5) Accuracy: ± (0.5% Thickness + 0.04）mm, depends on
material and conditions
6) Units: Metric/Imperial unit selectable
7) Four readings per second for single point measurement, and
ten readings per second in Scan Mode.
8) Memory to store up to 20 files (up to 99 values for each file)
9) Power Source: Two “AA”, 1.5 Volt alkaline batteries.
100 hours typical operating time (EL backlight off).
10) Communication: MT160: USB serial port
11) Outline dimensions: 150mm × 74mm × 32 mm
12) Weight: 245g
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1.2 Main Functions
1) Capable of performing measurements on a wide range of
material, including: metals, plastic, ceramics, composites,
epoxies, glass and other acoustically conductive materials.
2) Transducer models are available for special applications,
including: high temperature or coarse material applications.
3) Probe-Zero function
4) Sound-Velocity-Calibration function
5) Two-Point Calibration function
6) Two operating modes: Single point and Scan mode
7) Coupling status indicator
8) Battery status indicator
9) Auto sleep and auto power off function to conserve battery
life.
1.3 Measuring Principle
The digital ultrasonic thickness gauge determines the
thickness of a part or structure by accurately measuring the time
required for a short ultrasonic pulse generated by a transducer to
travel through the thickness of the material, reflect from the back
or inside surface, and be returned to the transducer. The measured
two-way transit time is divided by two to account for the down-
and-back travel path, and then multiplied by the velocity of sound
in the material. The result is expressed in the well-known
relationship:
MT160 Instruction Manual
800103 5
2tv
H
=
Where：H－Thickness of the test piece.
v－Sound Velocity in the material.
t－The measured round-trip transit time.
1.4 Configuration
No.
Item
Quantity
Note
Standard
Configuration
1
Main body
1
2
Transducer
1
Model: N05
3
Couplant
1
4
Instrument Case
1
Optional
Configuration
5
Transducer: N02
See Table 3-1
6
Transducer: N07
7
Transducer: HT5
Table 1-1: Product Configuration
1.5 Operating Conditions
Operating Temperature: -20℃～＋60℃;
Storage Temperature: -30℃～＋70℃
Relative Humidity: ≤ 90％；
The surrounding environment should avoid that of vibration,
strong magnetic fields, corrosive medium and heavy dust.
MT160 Instruction Manual
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2 Features
Figure 1: Product Features
1 Main Body 2 Keypad 3 LCD Display 4 Transmitter
Socket 5 Receiver Socket 6 Probe Zero-Disc
7 Communication Port 8 Label 9 Battery Cover
10 Probe
POWER: 2 X 1.5V
SN:
ULTRASONIC
THICKNESS GAUGE
MT160
MT160 Instruction Manual
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2.1 Main Screen
Figure 2: Main Screen
1. Coupling Status: Indicates the coupling status. While the
gauge is taking a measurement, the coupling status indicator
should be on. If it is not on or not stable, the gauge is having
difficulty achieving a stable measurement, and the thickness value
displayed will most likely be erroneous.
2. Unit: Current unit system. MM or IN for thickness value. M/S
or IN/μS for sound velocity.
3. Battery Information: Indicates the remaining capacity of the
battery.
4. Information Display: Displays the measured thickness value,
the sound velocity, and shows hints of current operation.
MT160 Instruction Manual
800103 8
2.2 Keypad Definitions
Turn the instrument
on/off
Sound velocity
calibration
Turn on/off the EL
backlight
Enter
Probe-Zero operation
Plus;
Turn on/off Scan
Mode
Unit switch between
Metric and Imperial
system
Minus;
Turn on/off Beep
Mode
Data Save or Data
Delete
Figure 3: Keypad Definitions
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800103 9
3 Preparation
3.1 Transducer Selection
The gauge is inherently capable of performing measurements
on a wide range of materials, from various metals to glass and
plastics. Different types of material, however, will require the use
of different transducers. Choosing the correct transducer for a job
is critical to being able to easily perform accurate and reliable
measurements. The following paragraphs highlight the important
properties 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 stronger a signal is to begin with,
the stronger its return echo will be. Initial signal strength is largely
a factor of the size of the ultrasound emitter in the transducer. A
large emitting area will send more energy into the material being
measured than a small emitting area. Thus, a so-called “1/2 inch”
transducer will emit a stronger signal than a “1/4 inch” transducer.
Absorption and Scattering. As ultrasound travels through any
material, it is partly absorbed. If the material through which the
sound travels has any grain structure, the sound waves will
experience scattering. Both of these effects reduce the strength of
the waves, and thus, the gauge’s ability to detect the returning
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