5
2
Technical specification
Product introduction
3. anvil
1. reading dial
2. indenter
1
2
3
Code
Application
ISHW-L20
ISHW-L20A
ISHW-L20B
Thickness requirement
Internal diameter
of flat workpiece
requirement of tube
workpiece
Wall thickness
requirement of
tube workpiece
Hardness range
Min.reading
Accuracy
Dimension
for aluminum
for aluminum alloy for aluminum
alloy general use
thick workpiece
alloy small tube
0.6~13mm
0.6~6mm
0.6~8mm
>Ø10mm
>Ø10mm
>Ø6mm
0.6~6mm
6~13mm
0.6~8mm
(internal diameter
Ø10mm~23.3mm
0.6~6mm
(internal diameter
>Ø23.3mm)
0~20HW
1HW
±0.5HW(at 5~17HW)
205x30x85mm
4
4. pivot screw
3
20 by regulating the adjustment screw, the indenter is worn and
needs to be changed.
2. Calibration of the load spring
Screw off the pivot screw, and take out the handle from the frame,
then remove the dial head from the indenter cylinder, leaving the
cylinder in the frame. Then the adjustment nut can be seen in the
indenter cylinder. Rotate the adjustment nut with the calibration
wrench. If the reading of the test block is smaller than the number
marked on the test block, rotate the adjustment nut counterclockwise,
otherwise, rotate the adjustment nut clockwise. When the nut is
rotated 30o to 45o, the reading will change by 1unit. Reassemble
the tester and verify the tester both on the test block and on the
anvil after regulating it.
Note: Do not calibrate the readings of the test block by regulating
the adjustment screw.
Changing the indenter
In case the reading can not be set to the full scale of 20 by regulating
the adjustment screw, which means the indenter is worn, the indenter
should be changed. Follow the steps below to change the indenter.
Screw off the pivot screw, and take out the handle from the frame, then
emove the dial head from the indenter cylinder, leaving the cylinder in
the frame. Then the adjustment screw can be seen in the indenter cylinder.
Rotate the adjustment screw off with the calibration wrench, then take
the indenter out and replace with a new indenter.
After the indenter is replaced, the load spring needs to be adjusted with
the adjusting nut. Only one rotation of the calibration nut is enough after
the resistance of the load spring is felt. The indenter tip will be damaged
by excessive pressure of the load spring after indenter replacement.
Maintenance
Prevent dust and dirt.
Prevent rust.
Prevent falling off.
Do not disassemble the dial head.
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