Twilight BL-BGD306 Technical manual

Impactómetro tipo ISO Sistema Métrico e Inglés
BL-BGD306

BGD 306
Impact Tester
Operation Instruction

1.0 Introduction
BGD 306 Impact Tester is used for testing the impact resistant performance when the coating such as
paints, varnish and other relative coating get impact and deformed under the standard conditions.
This instrument conforms to ISO 6272-1 ：2002 《Paints and varnishes--Rapid-deformation （impact
resistance）tests--Part 1:Falling-weight test, large-area indenter》and other relative requirements.
2.0 Principle
The coating under test is applied to suitable thin metal panels. After the coatings have cured, a standard
weight is dropped a distance so as to strike an indenter that deforms the coating and the substrate. The test
can be carried out with the coated side of the panel facing upwards （i.e. towards the falling weight and
indenter）or downwards （i.e. away from the weight and indenter）. By gradually increasing the distance the
weight drops, the point at which failure occurs can be determined. Films generally fail by cracking, which is
made more visible by the use of a magnifier or, on steel, by the application of a copper sulfate solution.
3.0 Structure
Hand Wheel
Lock Handle for Tube
Die
Foundation Screws for Leveling
Weight
Guide Tube
Metal Base Ring
Fix Screw for Tube
Clamping Sleeve
Indenter
Leveling bubble

Indenter 2kg additional weight 1kg additional weight
Metal Base Ring φ27mm die
Guide Tube: black alumina, around 1.2m in length; there is a notch with graduation.
Height limit ring: black nylon ring, when making test, slip it into the tube and move up and down to adjust the
the falling height, then fix it on the tube with the screw.
Fix screws for tube: screw it into the guiding groove of the tube when installing the tube, in case it moves
during the test.
Lock handle for tube: after installing the tube on the seat, tightly lock up the tube.
Metal Base Ring: Semicircle, above the mental base ring, of different thickness, to limit the indentation depth
of the falling weight.
Mental base ring: circular, 4mm in thickness, fix on the base stand during the test.
Clamping sleeve: stainless steel, the internal diameter is the same as ISO101’s（27mm）, clamp the test panel
by rolling the hand wheel.
Hand wheel: to clamp and loosen the test panel.
Leveling bubble: to determine the level of the impact tester
Foundation screw for leveling: 3 piece, to regulate the level of the impact tester.
1kg Indenter: conforms to ISO6272-1, the head having the shape of a spherical segment of diameter 20mm,
and a total mess of 1000g.
27mm die: conforms to ISO6272-1, with an inner diameter of 27mm.
1kg additional weight: stainless steel cylinder, with screws on one side, of 1000g, to attach it on the ISO
weight for adding the total weight.
2kg additional weight: stainless steel cylinder, with screws on one side, of 2000g, to attach it on the ISO
weight for adding the total weight.

4.0 Procedure
4.1 Preparation of test panels
4.1.1 Substrate
Unless otherwise specified, the substrate should conforms to the requirement of ISO1514.
The panel should be planar, free from distortion and at least 0.25mm thick. The dimensions shall be allow
the test to be carried out at least five different positions not less than 40mm from each other and not less than
20mm from the edge of the panel.
Measure the thickness to nearest 0.01mm.
4.1.2 Coating
Unless otherwise specified, prepare metal test panels in accordance with ISO 1514, then coat the
prepared panel according to the specified method.
4.1.3 Drying
Dry （or stove）and age （if applicable）each coated test panel for the time, and under the conditions,
specified by the manufacturer of the product or system under test, or as agreed between the interested parties.
4.1.4 Thickness of coating
Determine the thickness, in micrometer, of the dried coating by one of the procedures specified in ISO
2808. Make the measurements at, or as near as possible to, the positions at which the test is to be carried out.
Use only test panels for which the film thickness values do not differ from the specified or agreed film
thickness by more than 10 %.
Unless otherwise specified, the test should be carried out under the condition of （23±2）℃ and （50
±5）% in humidity.
4.2 Installation
4.2.1 Mount the apparatus on a level firm surface, then adjust it with 3 leveling foundation screws until it level.
4.2.2 Install the metal base ring on the right position of the base stand.
4.2.3 Choose a suitable weight（or with the additional weight）and install it from the top of the tube, then install
the height limit ring in the same way（the height limit ring is above the weight）.
4.2.4 Screw out the fix screw for tube and loosen the lock handle, then put the tube into the hole and make its
guiding groove face to the fix screw for tube.
Note: don’t fix the tube !
4.2.5 Lift the clamping sleeve by rolling the hand wheel and lift the weight, then choose and install a suitable
die according to the requirements.
4.2.6 Lift the weight and put a panel whose thickness is the same as the test panel on the die, then make the
clamp sleeve tightly clamp the panel by rolling the hand wheel.
4.2.7 Ensure the panel be flat on the die, and the head of the weight touching the testing surface. Adjust and
ensure the top of the weight handle is at the zero mark（see the following picture）.
4.2.8 Fix the tube by screw up the screw and lock up the lock handle, then take out the panel.

4.3 Procedure
4.3.1 Environmental requirements
Before testing, condition the coated panels at a temperature of （23 ±2） °C and a relative humidity of
（50 ±5）%（or at another temperature and humidity, agreed between the interested parties, from those
specified in ISO 3270 ）for a minimum period of 16 h. Begin the test procedure as soon as possible after
conditioning, but in any case complete it not later than 30 min after removal of the test panels from
conditioning.
Mount the apparatus on a firm surface （for example, concrete, steel or stone）.
Carry out the test at （23 ±2） °C or at another temperature, agreed between the interested parties,
from those specified in ISO 3270. State the test temperature at which the test was carried out in the test report.
Measure the relative humidity during the test and state it in the test report.
4.3.2 Pass/ fail test（using specified mass）
4.3.2.1 Adjust the height limit ring until its underneath edge stop at the specified height where it is expected
that no failure will occur.
4.3.2.2 If necessary, fit stops of total thickness sufficient to limit the indentation to a depth agreed between the
interested parties or as otherwise specified.
4.3.2.3 Place a test panel on the die, with the coated face up or down, as specified. Hold the test panel in
position by means of the clamping sleeve.
4.3.2.4 Lift the weight to the height limit ring, and let it fall on to the test panel.
4.3.2.5 Remove the test panel and examine the coating with the 10-times magnifier.
4.3.2.6 Report whether the coating on the test panel has cracked or has peeled from the substrate and
whether or not the substrate has cracked.
4.3.2.7 Repeat the test a further four times at different positions, giving a total of five drops. Report the coating
as satisfactory if at least four test positions show no cracking or peeling from the substrate.
4.3.3 Classification test （to determine the minimum drop height and mass which will cause cracking
or peeling）
4.3.3.1Adjust the height limit ring until its underneath edge stop at the specified height where it is expected that
no failure will occur.
4.3.3.2 If necessary, fit stops of total thickness sufficient to limit the indentation to a depth agreed between the
interested parties or as otherwise specified.
4.3.3.3 Place a test panel on the die, with the coated face up or down, as specified. Hold the test panel in
After placing the test
panel, the top of the weight
handle is at the zero mark

position by means of the clamping sleeve.
4.3.3.4 Lift the weight to the height limit ring, and let it fall on to the test panel.
4.3.3.5 Remove the test panel from the apparatus and examine the deformed area with the lens for coating
cracks and/or peeling from the substrate. If no cracks and/or peeling are evident, repeat the procedure at
successively greater heights until cracks and/or peeling are observed, the increments in the height being 25
mm or multiples of 25 mm. Note the height where cracks and/or peeling are observed for the first time.
If no cracks and/or peeling are observed when the weight is dropped from the maximum height allowed by
the apparatus, repeat the operation （starting at the lowest height setting）with an additional weight, making
a total of 2 kg.
If no cracks and/or peeling are observed, repeat the operation （starting at the lowest height setting）with
a further additional weight, making a total of 3 kg. Where required, a final additional weight may be added to
give a maximum mass of 4 kg.
4.3.3.6 Once cracks and/or peeling are observed, carry out the following procedure. Release the appropriate
weight and allow it to fall on to a test panel five times at different positions from each of the following heights:
◆the height where cracks and/or peeling were first observed during the procedure described in 4.3.3.5;
◆25 mm below this height;
◆25 mm above this height.
Test in a random fashion, taking care that not all impacts from one height are made in succession on one
panel.
4.3.3.7 Examine, using the lighting and the procedure specified in ISO 13076, the relevant areas of the
coating with the10 times magnifier for cracking and/or peeling from the substrate and tabulate all results as
pass or fail. Report as the end point of the test the mass/height combination for which the results change from
mainly passing to mainly failing.
4.3.3.8 If no end point can be established, repeat the procedure in 4.3.3.6 and 4.3.3.7, taking all heights 25
mm higher or lower, as appropriate, to ensure that the end point of the test is covered by the range of heights
tested.
Note:
1. About the usage of the stops:
Stops apply to ISO 6272-1, use with 20mm steel indenter. The depressed depth is 10mm impacted by 20mm indenter
without stops（no test panel）. If it requires 7mm in depressed depth, then it needs 1mm and 2mm 2 piece of stops, and
the like. Actually, different materials and thickness will cause the depressed depth different, so it needs to repeatedly
combine those stops until it reaches the required depressed depth.
The depressed depth of this apparatus should be 2mm at least, that is, the amount of stops can be 8mm at most; do
not install all the stops at the same time in case damage the apparatus.
2. If it needs replace different weights, please loosen the screw and lock handle, and take out the tube, then re-install the
apparatus according to 4.2.2~4.2.8
5.0 Notice
5.1 If the deepest depressed point deviates from the center of impact area, please contact with the
manufacture to calibrate.
5.2 If it needs to exchange a different weight and indenter, please loosen the screw for tube and the lock
handle, dismantle the tube and re-install the apparatus according to 4.2.2～4.2.8.
5.3 Regularly check the surface of the hemispheroid, exchange it in time if it gets deformed, rust, broken or
other failures.
5.4 Dismantle all the weights, indenter, and panel support, then clean them put them back to the package after

the test. Smear some preservative oil if not use in a long period of time.
6.0 Maintenance & After service
Biuged offers 1 year after service（from the day of delivery）to all our products free of charge, and offers
repair and calibration service for their whole life.
A. It shall be replaced free of charge with 15 days if it is not damaged by artificial factors, and we
undertakes the freight of the round trip.
B. Any machine damaged by nature factors which under the warranty, users only needs to send us the
machine and relevant components, we will provide repair service as well as relative accessories, then
send back to user free of charge.
C. Some machine damaged by nature factor or improper use which expired the warranty, users need to
undertake the freight of the round trip, the expense of replaced component and repair service.
D. To some machine damaged by human（such as changing circuit himself）, we will not offer any service
and support.
E. To make sure the machine whether it is damaged by nature factor or human, users have to offer the
original broken machine and components. If not, it will be regarded as damaged by human, and we will
not offer any service.
F. Guarantee certificate：the receipt and with our company stamp and delivery receipt with our company
stamp and the guarantee labels sticking on the machine, both are guarantee certificate. If not provide
any certificate as mention above, users can not have the guarantee service.
Note: It will cause other expense if dismantling or repairing the machine without our permission!
7.0 Packing List
Base
1 pc
Guide tube
1 pc
Height limit ring
1 pc
Metal base ring
1 pc
1kg indenter
1 pc
27mm die
1 pc
1kg additional weight
1 pc
2kg additional weight
1 pc
ISO 100 weight plastic holder
1 pc
Instruction manual
1 pc
Certificate
1 pc
8.0 Others