Elcometer 508 Manuale utente
User Guide
Elcometer 508
Digital Push Off Adhesion Tester
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1
Gauge Overview
2
Box Contents
3
Getting Started
4
Securing the Dolly
5
Preparing the Gauge for Test
6
Performing the Test
7
Assessing the Results (Destructive Testing)
8
After Test
9
Using a Dolly Plug
10
Spares & Accessories
11
Warranty Statement
12
Technical Specification
13
Legal Notices & Regulatory Information
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For the avoidance of doubt, please refer to the original English language version.
Gauge Dimensions: Instrument Length: 290mm (11.5")
Gauge Weight: 1.7kg (3.7lb)
The pressure gauge supplied with the Elcometer 508 Digital Push Off Adhesion Tester is intended for use
only as an integral part of the instrument and should not be removed by the user and used elsewhere.
A Material Safety Data Sheet for the adhesive supplied with the Elcometer 508 and available as an accessory,
can be downloaded via our website:
www.elcometer.com/images/MSDS/elcometer_mc1500_adhesive.pdf
© Elcometer Limited 2015. 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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1
1
1 GAUGE OVERVIEW
1 Digital Pressure Gauge
2 Crank Handle
3 Coarse Adjustment Screw
4 Quick Connect Coupling
5 Coupling Sleeve
6 Pressure Range Bar Graph
7 On/Off & Enter Key
8 Adhesion Reading
9 Battery Life Indicator
10 Units of Measurement (MPA or PSI)
11 Menu & Up Key
12 Zero/Max Hold & Down Key
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2 BOX CONTENTS
<
Elcometer 508 Adhesion Tester
<
Heating Tongs
<
Standard Flat Dollies (x5)
<
Dolly Plugs (x5)
<
Dolly Tool
<
MC1500 Cyanoacrylate Adhesive (50g)
<
2 x AA Batteries
<
Transit Case
<
Calibration Certificate
<
User Guide
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2
3
4
9
10
7
11
6
8
12
5
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3 GETTING STARTED
3.1 FITTING THE BATTERIES
1 Peel the protective rubber boot forward to expose the battery
compartment cover at the rear of the gauge.
2 Rotate the battery compartment cover anti-clockwise to the
‘unlock’ position.
3 Identify correct polarity and fit 2 x AA alkaline dry batteries.
4 Replace battery compartment cover and rotate clockwise to the
‘lock’ position.
5 Replace protective rubber boot taking care not to damage the
front panel of the display.
The battery symbol at the bottom right hand side of the display
indicates the battery condition.
3.2 SWITCHING THE GAUGE ON AND OFF
To Switch On: Press . The gauge displays the version of
software fitted (e.g. 1.04.03 IDENT) followed by the MIN and MAX
range in MPa.
To Switch Off: Press and hold for a second. The gauge will
switch off when the button is released.
Note: When the digital pressure gauge is switched off, “OFF” is permanently
displayed.
Automatic Switch Off: The gauge has a timer function and can be set
to switch off automatically after 1, 5 or 20 minutes of inactivity. The
gauge default setting is NONE.
1 Press until TIMER is displayed followed by to select.
2 Press or to toggle between the options; NONE, 1 MIN,
5 MIN, 20 MIN.
3 Press to select the setting required.
MENU
MAX
MENU
1 Identify the dolly test surface.
2 Ensure test surface of dolly is clear of
old adhesive - see Section 8.2
‘Cleaning the Dolly’ on page 7.
3 Wipe dolly test surface and sample
area with a solvent to remove oil and
grease.
4 Apply a thin, even coat of adhesive to
dolly test surface. If adhesive is low
viscosity, see Section 9 ‘Using a Dolly
Plug’ on page 8.
5 Press dolly on to sample for about 10 seconds.
6 Leave dolly undisturbed for at least 15 minutes (preferably for 2
hours or more), to allow the adhesive to harden.
7 If required, score the coating around the dolly using a dolly cutter
- see Section 10 ‘Spares & Accessories’ on page 9.
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3 GETTING STARTED (continued)
3.3 SELECTING THE UNITS
The gauge can display readings in MPa (Megapascals) or PSI
(Pounds per Square Inch).
1 Press until UNITS is displayed followed by to select.
2 Press or to toggle between MPA and PSI.
3 Press to select the units required.
3.4 RESETTING THE GAUGE
The gauge has a gauge reset function which restores the original
factory settings.
1 Press until RESET is displayed followed by to select.
2 Press again to confirm the reset. The gauge will reset and
switch off.
3 To cancel the reset request, press or to toggle to
‘CANCL’ followed by to confirm.
MAX
MENU
MENU
MENU
MAX
MENU
4 SECURING THE DOLLY
û
ü
üü
1 Fit the batteries, see Section 3.1.
2 Turn the crank handle anti-clockwise until
it is fully unwound.
3 Turn the coarse adjustment screw anti-
clockwise until it is fully unwound.
4 Zero the pressure gauge, see Section 5.2.
5 Select the measurement units; MPA
or PSI, see Section 3.3.
5.2 ZEROING THE DIGITAL PRESSURE GAUGE
1 Press to switch the gauge on.
2 Fully unwind the crank handle and coarse adjustment screw
(anti-clockwise) to release all pressure.
3 Press to zero the gauge and set the gauge to store the
maximum force recorded during test, known as ‘Max Hold’.
Max Hold: The display holds the maximum value until the button
is pressed for a second time. ‘Max Hold’ should be switched on before
MAX
undertaking an adhesion test, signified on the display by either MPA
MAX
or PSI. The ‘Max Hold’ feature is switched off when the gauge is
switched off.
Note: “RLOCK” will be displayed if the gauge zero has failed. This is due to the
pressure not being fully released from the instrument. If this occurs,
release all the pressure by turning the crank handle followed by the coarse
adjustment screw anti-clockwise until fully unwound and press to
repeat the gauge zero.
5.3 ATTACHING THE GAUGE TO THE DOLLY
1 Ensure the pin is pushed fully upwards towards the coupling.
2 Pull coupling sleeve up and insert pin into centre of dolly.
3 Release coupling sleeve.
4 The instrument should grip the dolly firmly. If the coupling does not grip the
dolly firmly, there may be excess adhesive in the centre of the dolly. Use
the dolly tool supplied to remove excess adhesive.
4 Turn the coarse adjustment screw clockwise to apply a small
amount of pressure (approximately 1 - 2MPa / 145 - 290psi),
until the coupling firmly grips the dolly.
5 PREPARING THE GAUGE FOR TEST
2
3
MAX
MAX
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MAX
6 PERFORMING THE TEST
1 Hold the gauge steady with one hand and
turn the crank handle clockwise slowly and
evenly to apply an increasing force to the
dolly and hence stress to the coating.
4 The rate at which the force is applied (the
speed of rotation of the crank handle) should
be in accordance with the relevant Standard.
Continue until either;
(a) the coating fails and the dolly is
removed from the surface
(destructive testing) or;
(b) the minimum specified pressure value is
reached (non-destructive testing).
2 Record the pressure indicated on the display (a) and unwind the
crank handle and coarse adjustment screw.
DO NOT exceed the maximum pressure as overloading could damage the
gauge.
Note: Dollies can be reused after cleaning until either the top of the dolly is
severely deformed or the dolly surface is no longer flat, see Section 8.2
‘Cleaning the Dolly’ on page 7. Additional dollies are available from
Elcometer or your local supplier - see Section 10 ‘Spares & Accessories’
on page 9 for details.
MAX
a
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7 ASSESSING THE RESULTS - DESTRUCTIVE TESTING
Once pulled from the surface, examine the bottom of the dolly to
assess the results.
a) Successful Test: In most cases the coating
will fully adhere to the dolly and the test can
be claimed as 100% valid.
b) Partial Failure: In some cases, the coating
will cover only part of the dolly face. A partial
adhesion / coating failure should be recorded
if the coating covers more than 50% of the
dolly face.
Cohesive Failure: When the coating fails in
the body of the coating layer leaving some
coating on the surface and some coating on
the dolly face.
a)
b)
7 ASSESSING THE RESULTS - DESTRUCTIVE TESTING (cont.)
c) Adhesive Failure: If no coating is present on
the dolly this must be recorded as a failure of
the adhesive (or glue). This is normally due to
incorrect or insufficient mixing of the
component parts of the adhesive,
incompatibility of the adhesive and the coating
or the dolly and / or test surface has not been
properly prepared before test - see Section 4
‘Securing the Dolly’ on page 4.
1 Fully unwind the crank handle and coarse adjustment screw
(anti-clockwise) to decrease the pressure to zero.
2 Pull up the quick connect coupling to release the dolly.
3 Press to release the ‘Max Hold’.
4 Press again to zero the gauge and reset ‘Max Hold’.
Note: Failure to release the ‘Max Hold’ and zero the gauge before each adhesion
test will result in an invalid adhesion measure.
8.2 CLEANING THE DOLLY
Cleaning the dolly produces unpleasant fumes - ensure that the
work area is extremely well ventilated. DO NOT inhale the
fumes.
HOT! Exposed very hot surfaces. Use great care when handling
or placing the tongs. Allow to cool before storing.
1 Plug the heating tongs into the mains supply and leave to warm
up for 5 minutes.
2 Heat the dolly with the tongs for 3 to 5 minutes. This will soften
the adhesive.
3 Using a sharp blade, remove the adhesive/coating from the test
surface of the dolly.
4 Drop the dolly into water or allow to cool naturally. Do not put the
heating tongs into water.
MAX
MAX
8 AFTER TEST
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c)
8 AFTER TEST (continued)
5 To remove any remaining adhesive, rub the dry, cool dolly with
fine sandpaper or similar.
6 Use the dolly tool to clear any adhesive from the dolly centre.
7 Wipe the dolly test surface with a solvent to remove oil and
grease.
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9 USING A DOLLY PLUG
Particularly in the case of low viscosity adhesives it is advisable to
place a nylon plug in the centre of the dolly before gluing it to the
surface.
This dolly plug stops glue going up the centre of the dolly, which can
impede the pin and prevent the test being carried out properly. Careful
cleaning of the centre hole increases the adhesion values for tests on
a given coating.
Each gauge is supplied complete with five dolly plugs. Additional plugs
are available to purchase separately, see Section 10.4 ‘Dolly Plugs’ on
page 13.
To use the dolly plug:
1 Place the dolly plug through the centre hole on the dolly so that
the tip protrudes just below the test surface.
2 Apply the adhesive to the dolly test surface, see Section 4
‘Securing the Dolly’ on page 4, taking care not to get adhesive on
the plug.
3 Press the dolly and dolly plug onto the sample area for about 10
seconds.
4 Remove the dolly plug from the centre of the dolly and wipe the
end clean using tissue soaked in a suitable solvent. If the dolly
plug becomes stuck to the dolly, use pliers to remove it.
5 Complete the test as described in sections 5 to 6.
10 SPARES & ACCESSORIES
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10.1 ADHESIVES
The adhesive supplied with the Elcometer 508 is 3M™ Scotch-Weld™
MC1500 Cyanoacrylate Adhesive.
Cyanoacrylate adhesives are normally recommended for gluing dollies
to the sample area due to their relatively quick curing time. However,
there are a number of coatings for which the cyanoacrylate adhesives
may not be suitable. These are:
1 Thermoplastics, celluloses, vinyl, chlorinated rubbers and some
acrylics, due to the possibility of the glue reacting with the coating.
2 Porous coatings e.g. some metal spraying, in which case the
glue, due to its low viscosity will travel into the coating, sticking
particles together and possibly altering its adhesion.
®
A two-pack epoxy such as Araldite or a modified acrylic gel-type
adhesive should be used with the coatings described in (1) and (2)
above.
If in doubt as to the type of adhesive to use, please contact the coating
manufacturer for advice.
Description Part Number
3M™ Scotch-Weld™ MC1500 T99911135
Cyanoacrylate Adhesive, 50g
A Material Safety Data Sheet for the adhesive supplied with the Elcometer 508 and available as an
accessory, can be downloaded via our website:
www.elcometer.com/images/MSDS/elcometer_mc1500_adhesive.pdf
® ® ®
Note: Other suitable adhesives include Loctite Hysol 907 and Araldite Standard.
The suitability of any adhesive should be determined by the user. Some
coatings can be adversely affected by adhesives. Some adhesives can be
contaminated by coating environments, solvents etc.
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