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larger than 30mm. And appropriate supporting ring should be
elected and installed.
7) A sample should not be with magnetic. The signal of the
impact device would be seriously interfered in the work by the
magnetic, which may cause inaccurate test results.
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Measuring Steps:
Loading: Simply load the impact device by sliding the loading
tube forward.
Place: Then place and hold the impact device on the surface
of the test piece at the desired test point. Impact indirection
should be vertical with the test of surface.
Burst impact (Measure): Trigger the impact by pressing the
release button. The hardness value will be instantaneously
displayed.
Read off the test result from screen.
Note: Generally, each measurement location of sample is
conducted for the five tests. The “S” (difference of maximum
value and minimum value) values must be less than 15HL.
The distance between any two impact position should be ≥3
mm ; the distance between impact position and the edge of the
sample should be ≥3 mm.
Memory:
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The data group (such as test result, conversion result, sample
material and impact direction) automatically save in memory after
one individual measurement. ISH-PHB hardness tester can store
99 sets of data, when measuring times more than 99, the last
group of data will store the 99th position and the first group of
data will be erased. The second group of data will be moved into
the 2th position, simultaneously the position of other group of
data, will be moved into lower position.
Press down arrow button to enter memory store mode, use up and
down buttons to browsing the memory.
Print (the printer is optional):
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After one set measurement press setup button and let the print
symbol blink, now press return button to print current result.
After using 1000-2000 times, users should clean the catheter of
impact device and impact body with nylon brush, and screw off
the supporting ring before clean the catheter, and then take out
the impact body, rotate the nylon brush into the tube in an anti-
clockwise direction, and pull out when touching the bottom. So
repeatedly, and then load up the impact body and supporting ring;
Users should release the impact body after use. And the lubricant
is banned.
In calibration of the hardness tester, if finding that error is larger
than 6HLD, users must be renew the steel ball or impact body,
because the reason may be that the steel ball or impact body is
wore out to lead to failure in operation.
Maintenance
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Impact Device Maintenance:
Normal Maintenance Procedures:
