Testing Solutions Since 1954

Ball Rebound Tester

Product Information:

Aside from testing the resilience of materials such as foam, polyurethane and other similar materials, the Bareiss Ball Rebound Tester is a popular Quality control device being used by many of the leading hybrid Mattress Manufacturers around the World. How else could we count on the best sleep possible if our mattress was not perfected using a Bareiss Resilience Tester? Another division that relies on our tester is the footwear industry. Whether it is for high-end athletic wear or daily wear, we all know what comfort means to our feet!

The elasticity of polymeric foam materials can be analyzed with a Bareiss Ball Rebound Tester, by measuring the rebound height of a ball after the free fall and impact on a test specimen. The 2-line LC display shows the measuring value and the median value in %. The rebound height is electronically determined through sensors. Thanks to a magnetic holder, the ball remains securely adjusted until the start of the measuring process before it is manually released with the help of the handwheel.

Single measurement with mode 0:

1) The electronic unit is switched off and the encoded switch is turned to position 0 using a screwdriver.
2) The clamping screw of the fixing bracket is loosened so that the downpipe is up until there is a distance between the downpipe and the sample placed on the supporting table.
3) Push down the pipe carefully until the foot is in contact with the sample and tighten the clamping screw.
4) Turn the knurled wheel carefully to the left until it stops and put the ball with the help of a magnet holder onto the holder plate and turn the knurled wheel carefully to the right until it stops.
5) The ball is set free and falls onto the sample, take the ball out with the help of a magnetic holder.
6) The measured value is transmitted via the interface to the computer.

Measurement acc. DIN EN ISO 8307 with mode 1 (median value):

1) According to norm 3 measurements are made on 3 samples each and one median value is calculated from each series of measurements and one median value is calculated from the 3 median values.
2) The electronic unit is switched off and the encoded switch is turned to position 1 using a screwdriver.
3) 3 readings on 3 samples are measured and the median is displayed. Once 3 median values are obtained the final median value is displayed.
4) The measured value is transmitted via the interface to the computer.

Measurement with pre-measurements in mode 2 (median value):

1) The electronic unit is switched off and the encoded switch is turned to position 2 using a screwdriver.
2) 3 measurements are taken for preconditioning and repeat the measurements twice.
3) Once preconditioning values are obtained, 3 values are obtained from 3 samples each and the final median value is calculated.
4) The measured median value is transmitted via the interface to the computer.

Measurement acc. ASTM D 3574 with mode 3 ( average value) :

1) The electronic unit is switched off and the encoded switch is turned to position 3 using a screwdriver.
2) According to norm 3 measurements are made on 3 samples each and one average value is calculated from each series of the measurement and one average value is calculated from the three average values.
3) 3 readings on 3 samples are measured and the average is displayed. Once 3 average values are obtained the final average value is displayed.
4) The measured value is transmitted via the interface to the computer.

Measurement with pre-measurements in mode 4 (average value):

1) The electronic unit is switched off and the encoded switch is turned to position 4 using a screwdriver.
2) 3 measurements are taken for preconditioning and repeat the measurements twice.
3) Once preconditioning values are obtained, 3 average values are obtained from 3 samples each and the final average value is calculated.
4) The measured average value is transmitted via the interface to the computer.

Application

Test Method Ball Ø (mm) Ball Mass (g) Height of fall (mm) Operating modes
Single measurement Mode 0
Acc. To DIN EN ISO 8307
9 measurements on 3 samples
3 median values are taken, and
the final median value
is selected
16 ± 0.5 16.8 ± 1.5 500 ± 0.5 Mode 1
6 measurements
3 pre-measurements for conditioning
The median value of 3 measurements is selected
Mode 2
Acc. To ASTM D 3574
9 measurements on 3 samples
3 average values are taken, and
the final average value is selected
16.03 ± 0.2 500 ± 0.2 Mode 3
6 measurements
3 pre-measurements for conditioning
The average value of
3 measurements is selected
Mode 4

Package content kit

EKST test stand
Downpipe EKF 500 – the height of fall 500 mm
Pick up bracket, magnetic steel ball with holder
Electronic unit

Measuring Principle

A Ø16 mm magnetic steel ball falls freely onto the sample from a specified height of 500 mm.

Standards

DIN EN ISO 8307, ASTM D 3574

Official DAkkS-calibration certificate

Works-Calibration certificate for 500mm ball rebound

Software Hard test for Windows

System for data logging and analysis

Specifications and Technical Data

Power supply Flange power supply set
INPUT : 100-240VAC; 50/60 Hz   OUTPUT : 3.3 VDC
Measuring range 0 -100%
Dimensions Test stand with down pipe: 200 x 250 x600 mm
Electronic unit: 200 x 171 x 90 mm
Data output RS 232
Weight 9 Kgs
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