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CAT NO: DIDACTICNLE-Export-320003
Vibration Tester.
Vibration Tester For Transport Packages -
The effect of vibrations experienced during transport on packaged
materials is normally determined by subjected them to a simulated
vibration test.
In this test, the package under test is placed
over a vibrating table capable of moving about a vertical axis by a
fixed amplitude at a fixed frequency. The effect of a specified number
or period of vibrations on the packed materials is observed to evaluate
the resistance provided by packaging to such vibrations.
The Globe Vibration Tester
for transport packages consists of horizontal table mounted above an
oscillating block and rigidly connected to it. This table is given
oscillatory movement of a fixed amplitude by the movement of the block,
which is in turn held over two hardened and ground carbon steel rods and
is given an oscillatory movement with the help of an electric motor
coupled to a V-belt and speed reduction pulley arrangement. The block
has two gunmetal bushes to give it a long working life.
The
rotary movement of the pulley is converted into linear movement of the
block with the help of an eccentric pin and a linkage mechanism. The
eccentric pin is fixed to a disc mounted on the shaft on which the
pulley is mounted.
In the fixed frequency model of the tester,
the frequency of vibrations is set at 4 Hz. In the variable frequency
model it can be set at any desired value in the range of 1 to 8 Hz with
the help of a variable frequency inverter drive supplied with the
equipment. A six digit electronic counter with non-contact infrared
sensor is provided to record the total number of oscillations undergone
by the components under test. The counter has a memory backup to retain
the count of number of oscillations undergone in case of accidental
switching off of power supply to the equipment. A key-operated reset
switch is provided to reset the count to zero at the end of test
duration.
The package under test is placed on the vibration
table. It is prevented from dropping down by a low level guard along the
periphery of the table. The table is square in shape so that the
package can be rotated through 90° after every 25% of total number of
specified oscillations.
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