5
6
Fig
.
1
After the installation of the hardness tester, take away the external
white gauze strip of the machine. Remove the dust cover, use
gasoline to clean the antirust grease on the lifting and lowering
screw rod. After it is dried, coat with certain amount of thin grease
for lubrication. Then, unscrew the screws on the upper cover and
rear cover respectively, and open the upper cover and rear cover,
and unloosen the white gauze strip and rubber band which are
inside the machine and take out the oblique shape EPS which is
under the screw rod. In the course of operation, pat attention not to
touch the optical elements. After completion, close the upper cover
in time.
Tester unpacking:
Open the packing box cover and take out all cushion
materials. Remove the accessory box.
Lift the bottom plate, unscrew the two (2) M 10 bolts under the
bottom plate with a spanner, to separate the hardness tester
from bottom plate, all steps shall be done in a safe manner.
After unpacking, the tester shall be placed on a stable bench
with levelness deviation less than 1 mm/m. A hole shall be
drilled at an appropriate location on the bench (see fig 1) to
enable the lifting screw to operate properly.
2
3
4
Installation of weight set:
Turn the load adjustment hand wheel to the point of 306N, install the
small "0” weight on to the hanging hook which is on the upper part of
the suspended lever, then place the other 4 weights according to the
sequence of No. 4, 3, 2, 1, respectively from the bottom to the top on
to the tray, and observe whether the installation is correct or not .
Adjustment of the loading speed:
Oil contained in the buffer has already been fully drawn out before
packaging and leaving the factory, hence, before use, oiling the
necessary. Turn the adjustment handle counter clockwise to
unloosen the needle valve, open the dust cover plate of the oil filler
hole, and push the loading handle backward in the direction, use a
needle tube to inject some 50 ml grease Then pull slowly the loading
handle back and forth, repeat in this way many times so as to make
the extra grease overflow from the oil filler hole, erase away the
overflow grease, then close the dust cover plate.
Adjust the loading speed of the buffer: switch on the power supply,
a n d p l a c e t h e t e s t p l a t f o r m . Tu r n t h e l o a d i n g h a n d l e
counterclockwise to pull it forward, so as to uplift the screw rod
slowly, when the test platform touches the plane of the surveying rod
(at that time, the indenter is not mounted yet) uplift the screw rod
continuously. When the oblong signal displayed in the reading
projecting screen and the target rod gradually uplift. Finally, when
the base line and the fixed target rod of the projecting screen
coincide, then stop to uplift the screw rod and pull the handle
backward by turning the handle in a clockwise direction, at that time,
the buffer start its action, the target rod and the signal start to lower
gradually, the quickness and slowness of the lowering speed will be
adjusted by the buffer adjustment handwheel.
5
Adjusting the clarity of the projecting target rod:
After switch on the power supply, in case it is discovered that the
projecting target rod is dim and not clear, you may rotate the knurled
nut in order to make the lamp revolve or uplift, then tighten the
knurled nut.
Installation of the microscope:
The microscope which has its internal lighting system is mounted on
the left clamping chuck of the machine body by means of its
cooperation with the sliding plate test platform, it is capable to test
the Brinell and Vickers hardness of the metallic materials.
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7
When carrying out the Brinell, Vickers hardness test, first, mount
the sliding plate test platform on the axial hole of the lifting and
lowering screw rod, and fix it by nuts.
