Elcometer MTG2 Manuel utilisateur
User Guide
Elcometer MTG2 & MTG4
Ultrasonic Material Thickness Gauges
www.elcometer.com
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Hg
www.elcometer.com
Section
Page
1
Gauge Overview
en-2
2
Box Contents
en-2
3
Using the Gauge
en-3
4
Getting Started
en-3
5
Setting the Zero Point
en-6
6
Calibration Methods - MTG4
en-7
7
Calibrating Your Gauge - MTG4
en-8
8
Taking a Reading
en-9
9
Menu Structure - MTG4
en-10
10
Menu Structure - MTG2
en-11
11
Upgrading Your Gauge
en-11
12
Spares & Accessories
en-11
13
Technical Specification
en-15
14
Legal Notices & Regulatory Information
en-16
15
Appendix 1: Preparing The Test Surface
en-17
For the avoidance of doubt, please refer to the original English language version.
Gauge Dimensions: 145 x 73 x 37mm (5.7 x 2.87 x 1.46") - without transducer
Gauge Weight: 210g (7.4oz) - including batteries, without transducer
Material Safety Data Sheets for the ultrasonic couplant supplied with the Elcometer MTG2 & MTG4 and available as
an accessory, are available to download via our website:
Elcometer Ultrasonic Couplant Material Safety Data Sheet:
www.elcometer.com/images/stories/MSDS/Elcometer_Ultrasonic_Couplant_Blue.pdf
Elcometer Ultrasonic Couplant (High Temperature) Material Safety Data Sheet:
www.elcometer.com/images/stories/MSDS/elcometer_ultrasonic_couplant_hi_temp.pdf
© Elcometer Limited 2014 - 2018. All rights reserved. No part of this document may be reproduced, transmitted, transcribed,
stored (in a retrieval system or otherwise) or translated into any language, in any form or by any means (electronic,
mechanical, magnetic, optical, manual or otherwise) without the prior written permission of Elcometer Limited.
CONTENTS
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en-1
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1 GAUGE OVERVIEW
2
3
6
4
1
5
1 LED Indicators - Red (left), Green (right)
2 LCD Display
3 Softkeys
4 On/Off Key
5 Zero Disk
6 Transducer Connection Point
7 USB Data Output Socket (below cover)
8 Battery Compartment (¼ turn open/close)
9 Wrist Strap Connection
7
9
8
2 BOX CONTENTS
Elcometer Ultrasonic Material Thickness Gauge
5MHz 1/4" Potted Right Angle Dual Element Transducer (MTG2 only)
Ultrasonic Couplant; 120ml (4fl oz Bottle)
2 x AA Batteries
Protective Case
Wrist Harness
Screen Protector
Test Certificate
User Guide
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a
Power: Batteries or USB -
including battery life indicator
b
Measurement Mode - P-E: Pulsed Echo;
E-E: Echo/Echo ThruPaint™ (MTG4)
c
Calibration Method (MTG4)
d
Calibration: Sound-Velocity (MTG4)
e
Reading Stability Indicator
f
Measurement Units - mm, Inch
g
Menu Softkey
h
Reading Value
4.1 FITTING THE BATTERIES
Each gauge is supplied with 2 x AA alkaline batteries.
To insert or replace the batteries:
1 Lift the latch on the battery compartment
cover and rotate anti-clockwise to remove
the cover.
2 Insert 2 batteries taking care to ensure
correct polarity.
3 Refit the cover and rotate the latch
clockwise to close.
The battery condition is indicated by a symbol in the top right of the
display ( ):
Full symbol (orange) = batteries at full capacity
Empty symbol (red, flashing) = batteries at lowest sustainable level
Note: Batteries must be disposed of carefully to
avoid environmental contamination. Please
consult your local Environmental Authority for
information on disposal in your region. Do
not dispose of any batteries in fire.
4.2 CONNECTING A TRANSDUCER
1 Align the red dot on the
transducer plug with the red
dot on the base of the gauge.
2 Push the transducer into the
gauge, ensuring that the
connector is fully engaged.
+
+
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en-3
3 USING THE GAUGE
4 GETTING STARTED
h
b
a
c
d
e
f
g
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All dual element transducers which can be connected directly to the
base of an MTG gauge - see Section 12.1 ‘Transducers’ on
page en-11 - are ‘intelligent’ transducers and will be identified
automatically by the gauge. Details of the transducer connected can
be viewed at any time via Menu/About/Transducer Information.
A transducer adaptor is available which enables other Elcometer
‘non-intelligent’, dual element transducers and other manufacturers’
transducers, to be used with the Elcometer MTG product range - see
Section 12.4 ‘Transducer Adaptor’ on page en-15.
4.3 SELECTING YOUR LANGUAGE
1 Press and hold the ON/OFF button until the Elcometer logo is
displayed.
2 Press Menu/Setup/Language and select your language using
the softkeys.
3 Follow the on screen menus.
To access the language menu when in a foreign language:
1 Switch the gauge OFF.
2 Press and hold the left softkey and switch the gauge ON.
3 Select your language using the softkeys.
4.4 SCREEN SETTINGS
A number of screen settings can be defined by the user via
Menu/Setup/Screen Settings including:
Screen Brightness; This can be set to ‘Manual’ or ‘Auto’ - the
brightness is adjusted automatically using the gauge’s ambient
light sensor.
Screen Timeout; The display will dim if inactive for more than
15 seconds and will go ‘black’ if inactive for the period defined.
Press any key or tap the gauge to awaken it. The gauge can
also be set to switch off automatically after a user defined
period of inactivity via Menu/Setup/Gauge Auto Off. The
default setting is 5 minutes.
4 GETTING STARTED (continued)
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4.5 SELECTING THE MEASUREMENT MODE - MTG4
The MTG2 has one measurement mode, ‘Pulsed Echo’. The MTG4
has two measurement modes ‘Pulsed Echo’ and ‘Echo-Echo
ThruPaint™’. For an explanation of the different modes, see
Table 1: Measurement Modes.
To select the measurement mode (MTG4), press Menu/Setup/
Reading/Measurement Mode.
TABLE 1: MEASUREMENT MODES
Measurement
Mode
Icon
Description
Pulsed Echo
(PE)
The total thickness from the base of the transducer
to the material density boundary (typically the
back-wall) is measured. Suitable for measurement
of materials between 0.63mm and 500mm (0.025"
a
to 19.999") thick.
Echo-Echo
ThruPaint™
(EE)
A coating of up to 2.0mm (0.08") thick is ignored
and the material thickness from the top surface of
the material to the material density boundary
(typically the back-wall) is measured. Suitable for
measurement of materials between 2.54mm and
a
20mm (0.100" to 0.787") thick.
a Thickness range is dependent on the material being measured and the transducer used.
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en-5
4 GETTING STARTED (continued)
Note: The gauge should be re-calibrated when the measurement mode is changed -
see Section 7 ‘Calibrating your Gauge’ on page en-8. The calibration icon will
flash intermittently to indicate that re-calibration is required.
4.6 SELECTING THE MEASUREMENT UNITS
The gauges can display readings in mm or Inch. To select the
measurement units, press Menu/Setup/Units.
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Setting the zero point for the transducer is important. If the zero
point is not set correctly, all measurements will be inaccurate.
The gauge will remember the last zero point. It is generally a good
idea however, to set the zero point whenever the gauge is switched
on, and when a different transducer is used. This will ensure that
the zero point is correct.
To set the zero point:
1 Plug the transducer into the gauge
ensuring that the connector is fully
engaged.
The wearface of the transducer should
be clean and free of any debris.
2 Press the On/Off button to switch
the gauge on.
3 Press Menu/Calibration/Zero Set
and apply couplant to the zero disk.
4 When prompted, press the
transducer on to the zero disk,
making sure it is flat against the
surface.
The display will show a thickness value
which is constantly updating. The
stability of the reading is indicated on the
stability bar to the right of the display. A
valid reading has a stability of 5 or more.
5 Remove the transducer from the
zero disk. The last reading is held
on screen. If not representative,
repeat Step 4.
Excessive use of couplant can result
in a distorted reading when the
transducer is removed from the
surface.
6 Press ‘Zero’ to set the zero point.
5 SETTING THE ZERO POINT
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In order for the gauge to make accurate measurements, it must be
set to the correct sound-velocity for the material being measured.
Different types of material have different sound-velocities. For
example, the velocity of sound through steel is 5920m/s
(approximately 0.233in/µs) and the velocity of sound through
aluminium is 6350m/s (approximately 0.248in/µs).
Setting the calibration is crucial for the gauge to function correctly.
The calibration procedure should be performed when the
measurement mode, transducer and / or material type is changed.
The MTG2 is pre-calibrated for steel only - the calibration cannot be
adjusted by the user. The MTG4 has a choice of calibration
methods, see Table 2: Calibration Methods.
To select the calibration method (MTG4), press Menu/Calibration/Cal
Method.
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6 CALIBRATION METHODS - MTG4
TABLE 2: CALIBRATION METHODS
Calibration
Method
Icon
Description
1 Point
This is the simplest and most commonly used
calibration procedure. After setting the zero point -
see Section 5 ‘Setting the Zero Point’ on page
en-6 - a reading is taken and adjusted on an
uncoated sample piece of test material of a known
thickness. Once the thickness has been entered
and confirmed, the derived sound-velocity is
displayed.
Material
Calibration using the sound-velocity of a material,
selected from a pre-defined list of materials stored
in the gauge.
Factory
Calibration
Calibration using the default factory calibration of
the standard sound-velocity for steel, 5920m/s
(approximately 0.233in/µs).
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7.1 USING 1 POINT CALIBRATION
This procedure requires an uncoated sample piece of the material
being measured, the exact thickness of which is known (from having
been measured by some other means) or a calibration standard - see
Section 12.2 ‘Calibration Standards’ on page en-13.
1 Plug the transducer into the gauge ensuring that the connector is
fully engaged.
The wearface of the transducer should be clean and free of any debris.
2 Press the On/Off button to switch the gauge on.
3 Press Menu/Calibration/Cal Method and select ‘1 Point’.
If ‘1 Point’ is already selected - the calibration method currently selected is
indicated by the icon to the right of the display - simply press
Menu/Calibration/Calibrate.
4 The user will be prompted to perform a ‘Zero Set’ to set the zero
point of the transducer, which is recommended before calibrating
the gauge - see Section 5 ‘Setting the Zero Point’ on page en-6.
5 When prompted, apply couplant to the uncoated sample or
calibration standard.
6 Press the transducer on to the uncoated sample or calibration
standard, making sure it is flat against the surface.
The display will show a thickness value which is constantly updating. The
stability of the reading is indicated on the stability bar to the right of the
display. A valid reading has a stability of 5 or more.
7 Remove the transducer from the uncoated sample or calibration
standard. The last reading is held on screen. If not
representative, repeat Steps 5-6.
Excessive use of couplant can result in a distorted reading when the
transducer is removed from the surface.
8 Press ‘Adjust’ and using the softkeys, adjust the reading to
the known thickness value, followed by ‘Set’ to set the value.
Pressing ‘Escape’ at any time will exit the calibration procedure without
calibrating the gauge.
The derived sound-velocity will be displayed to the right of the display,
below the calibration method icon.
Note: One point calibration must be performed on material with the paint or coating
removed. Failure to remove the paint or coating prior to calibration will result in
inaccurate readings.
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7 CALIBRATING YOUR GAUGE - MTG4
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7.2 USING MATERIAL CALIBRATION
The gauge is calibrated using the known sound-velocity of a material
as selected by the user from a pre-defined list stored in the gauge.
This calibration method is useful if uncoated sample test pieces of
known thicknesses are not available.
1 Press the On/Off button to switch the gauge on.
2 Press Menu/Calibration/Cal Method and select ‘Material’.
If ‘Material’ is already selected - the calibration method currently selected
is indicated by the icon to the right of the display - simply press
Menu/Calibration/Calibrate.
3 Use the softkeys to highlight the required material followed
by ‘Select’.
Pressing ‘Escape’ at any time will exit the calibration procedure without
calibrating the gauge.
The sound-velocity of the material selected will be displayed to the right
of the display, below the calibration method icon.
7.3 USING FACTORY CALIBRATION
Press Menu/Calibration/Factory Calibration to restore the default
factory calibration setting of the standard sound-velocity for steel,
5920m/s (approximately 0.233in/µs).
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en-9
7 CALIBRATING YOUR GAUGE - MTG4 (continued)
8 TAKING A READING
8.1 BEFORE YOU START
1 Press the On/Off button to switch the gauge on.
2 Connect a transducer to the gauge.
All dual element transducers which can be connected directly to the base
of an MTG gauge - see Section 12.1 ‘Transducers’ on page en-11 - are
‘intelligent’ transducers and will be identified automatically by the gauge.
If using other Elcometer ‘non-intelligent’, dual element transducers or
other manufacturers’ transducers, a transducer adaptor is required - see
Section 12.4 ‘Transducer Adaptor’ on page en-15.
3 Select the measurement mode (MTG4) - see Section 4.5 on
page en-5.
4 Set the zero point of the transducer - see Section 5 on page
en-6.
5 Calibrate the gauge (MTG4) - see Section 7 on page en-8.
6 Prepare the test surface - see Appendix 1 on page en-17.
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