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The instruction manual for this equipment can be found here: V-Meter MK IV Instruction Manual
Transducers for this equipment can be found here, Transducers
This is a brief video showing how to operate the V Meter MK IV.
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Product Description:
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V-Meter
MK IV™
The most
advanced ultra-sonic test system for accurately
identifying
basic characteristics of coarse grained materials such as concrete,
wood, masonry, ceramic, graphite and more!
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Operator Reviewing V-Meter MK IV™ Data
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V-Meter MK IV™ evaluating a round Column
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Locate Honey Combs and Voids in
Concrete
- Locate Cracks in Concrete,
Ceramics, Masonry or Stone
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Determine Fire Damage Extent in
Concrete or Masonry
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Crack Depth Determination
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Determining Young's Modulus ( with
optional Shear Wave Transducers )
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Find Hidden Areas of Rotting Wood
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System has a direct digital read-out of transit time, and read out of wave form on daylight display, back lit LCD.
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Rugged and splash resistant case is built for tough construction environments. Portable,
and light weight with both rechargeable battery and standard A-C power.
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Includes a signal and trigger output for use with external oscilliscope or other data input device. Digital calibration means no special bar required. Trigger levels and Signal amplification can be digitally adjusted.
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Conforms to ASTM C-597, BS 1881-203 and other international standards
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USB interface
for computer control.
Veelinx
software allows complete control of the system as well as data upload
to a PC and data analysis.
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Direct reading
of calculated P-wave velocity and S-wave velocity.
The
unit can also calculate modulus of elasticity of material using
optional
S-WaveTransducers. Direct reading
of Poisson's ratio
- A large range of Accessories and UltrasonicTransducers available.
Standard Transducers available from 24KHz to 500 KHz enable
the unit to test ceramics, graphite, mass concrete pores, and wood.
Exponential Transducers for rough surfaces, as well as
underwater transducers are also available. Finally a
Pre-Amplifier
is available for help with long distances or highly
attenuative materials.
Concrete
The
V-Meter MK IV™ is
widely used and accepted for quality control and inspection of
concrete. It can measure and correlate concrete strength to standard
strength measurement, permitting non-destructive testing of complete
structures. It will identify honeycombs, voids, frozen concrete, cracks
and other non
-homogenous
conditions in concrete. Ultrasonic testing can be applied to new and
old structures, slabs, columns, walls, fire damaged areas,
hydroelectric structures, pipe, prefab and pre-stressed beams,
cylinders and other concrete forms. A wide range of transducers are
available.
Wood
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V-Meter MK
IV™ used on Wood Direct Mode
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V-Meter MK
IV™ used on Wood Direct Mode
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V-Meter MK IV™,
ultrasonic testing of wood can, nondestructively, detect knots, shakes,
splits, grain orientation, windfall cracks and presence of decay and
rot. Basic parameters such as modulus of elasticity and density can be
calculated. Practical applications
include
field
testing of utility poles and structures, grading in the manufacturing
process, fire ladder inspection, examination of laminates and paper
roll
density. The velocity of ultrasonic energy pulses traveling in a solid
material are related to the density and
elastic
properties of the material. The pulse velocity is thus a measure of
density and elastic properties of the material. In transmitting
ultrasonic energy through a coarse grained material such as concrete,
ceramics or wood, it is necessary for the wave length of energy to be
greater than the diameter of the largest grain particle. If it is not,
all of the energy will be reflected back by the particles and none will
reach the receiver. Typically, the 54 KHZ transducers are used for wood
testing. The signal wave length is about 3 inches (75mm).
Finer
materials require higher frequencies for optimum
resolution.
Ceramics
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V-Meter MK
IV™ used
with Ceramic Sample
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V-Meter MK IV™ has
been successfully applied to a range of ceramic products--including
tile, refractory bricks and blocks, and kiln furniture--as well as
graphite. In an increasing number of refractory and ceramic
applications, the ultrasonic pulse velocity testing technique has been
used with positive results. UPV testing has enabled users to improve
their production processes, increase the integrity and quality of their
products, and reduce scrap and reject rates-thereby saving both time
and money. In today's economy, such bottom-line benefits are difficult
to ignore.
The
instrument has an easy to view display (320 by 240 pixels). The backlit
for daylight
use, makes field work easier and
faster, since the operator can identify good results in seconds without
the problems
related
with the sun light reflection on the screen. The signals can be
recorded in the instrument for review on the screen or for transfer to
a PC.
Typically,
the 54 KHZ transducers are used for concrete testing - the signal
wavelength is about
75mm
( 3 inches ).
Finer materials require higher
frequencies for optimum resolution. The basic
V-Meter MK IV™
contains a transmitter, a
receiver and a very accurate high speed
electronic
clock. The transmitter generates an electrical pulse which when applied
to a transmitting transducer, converts the electrical energy into a
pulse of ultrasonic mechanical vibration. This vibration is coupled
with
the specimen under test by placing the transducer in contact with the
specimen. At another selected point on the specimen another receiving
transducer is coupled by mechanical contact. Each transmitted pulse of
energy registers on the high speed clock. The first energy wave
reaching
the receiving transducer is converted back to an electrical signal and
turns off the clock. The elapsed time is
displayed
on the LCD in 0.1 microsecond increments. The
unit can also display and store the resulting waveform. This
ensures
the operator that a proper acoustic contact has been made with the
surface of the material under test.
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V-Meter MK IV™
Showing Elapsed Time
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V-Meter MK IV™
Showing Waveform
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V-Meter
MK IV Standard 54KHz Transducers
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The standard transducers for the V-Meter MK IV™
are made for a 54 KHz high Q resonant frequency with a
stainless steel housing. The connector is a ninety degrees to
the face
of the transducer to facilitate operation and getting proper acoustic
contact. A push button and special cable are added to the
reciever in
order to store data while taking readings. The data can later be
uploaded to a computer via the
Veelinx
software. An adapter is provided to
utilize the receiver with standard co-axial cable.
The ultrasonictransducers are typically used in one of three
configurations, direct, semi-direct and indirect mode. Direct
is the most sensitive method as the receiving transducer will receive
maximum energy from the transmitted pulse. Since the longitudinal
pulses leaving the transmitter are propagated mainly in the direction
normal to the transducer face. The travel time is affected by the
concrete condition along the thickness of the member. Semi-direct
transmission is performed with transducers on adjacent faces. This is
the next preferred method. Finally, In-Direct the least preffered. with
the transducers on the same face. This should be used only
when it is impossible to have access to two faces of the material under
test. The received amplitude of the method, for the same path length,
is only about 2% of that received signal when using the direct method.
Testing for shear waves can only be performed with the
In-Direct method, with both transducers on the same face as the
specimen under test.
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Transducers
being used in Direct Mode
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Transducers
used in Semi-Direct Mode
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Transducers
used in Indirect Mode
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Frequency
range:
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24 to 500
kHz, based on transducers selected.
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Receiver
sensitivity:
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250 micro
volts, between
30 kHz and 100 kHz.
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Receiver input impedance:
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approximately 100 k Ohms.
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Transit time measurement:
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0.1 to 6553.5 microseconds, direct digital display.
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Measurement
accuracy:
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0.1
microseconds.
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Transmitter
output:
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pulse 1000/500V, 2 microseconds.
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Transmitter
pulse group rate:
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selectable 1, 3 or 10.
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Gain
Selection:
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1, 5, 10,
25, 50, 100, 250, 500
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Battery:
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14 Volt. 4-10 hours continuous use (Lithium Ion).
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Display:
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320 by
240; backlit for daylight use.
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Storage:
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1800 plus
readings
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Software:
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Windows
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Temperature:
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0° - 50°C
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Instr.
Weight:
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6 lbs.
(2.75 Kg)
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Ship
Weight:
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17 lbs.
(7.7 Kg)
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Dimensions:
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4.5" x 8.5" x 10.5"
(114.3mm x 223.5mm x 267mm)
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ASTM C-597 - "Standard Test Method for Pulse
Velocity Through Concrete"
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ASTM C-769 - "Standard Test Method for Sonic Velocity in Manufactured Carbon and Graphite Materials for Use in Obtaining an Approximate Value of Young's Modulus"
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BS EN 12504 - 4:2004 ( Formerly BS 1881-203 )
"Determination of Ultrasonic Pulse Velocity"
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ASTM D2845 - 08 "Standard Test Method for Laboratory
Determination of Pulse Velocities and Ultrasonic Elastic Constants of
Rock"
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ASTM E494 - 10 "Standard Practice for Measuring Ultrasonic
Velocity in Materials"
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ACI 228.2 R "Nondestructive Test Methods for Evaluation of
Concrete in Structures"
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ISO1920-7 : 2004 "Testing of Concrete -. Part
7:Non-Destructive Tests on Hardened Concrete"
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IS13311 Part 1: "Non - Destructive Testing of Concrete
Methods of Test Part 1 - Ultrasonic Pulse Velocity"
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V-C-400: V-Meter MK IV Complete System
(includes two 54 KHz Transducers and Velocilinx Software)
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V-C-401: V-Meter MK IV System w/o
Software (includes two 54 KHz Transducers)
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V-C-402: V-Meter MK IV Basic System
(includes
Velocilinx Software, but no
Transducers
)
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V-C-403: V-Meter MK IV Basic System
w/o Software(no
software, no Transducers)
Downloadable Documents:
V-Meter Datasheet.pdf
Downloadable Instruction Manual
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