3.3 Scale
In measurement mode, press to convert to the
other hardness scales or tensile strength (MPa).
Notes:
A) The conversion value is “---” indicated the conversion is out of range.
B) When you set the conversion from hardness scale to tensile strength or from
tensile strength to hardness scale, you must be reset the material group.
C) Conversion value only supplies the general reference, which may result in
some offset. Precisely conversion generally needs related comparative tests.
3.2 Impact Direction
In measurement mode, press button to select the
impact direction.
The tester can do some correction for test directions
automatically.
2.4 Browse
The tester can save 9 hardness values, you can browse them after testing.
Press
button to browse stored data and display the first data in last
nine test data, including hardness value HLD, material code, conversion,
impact direction, date and time etc.
Press or button to browse the next or previous data group.
Press button back to the measurement mode.
3.4 Clock
The Hardness Tester has built-in real-time
clock system.
It must be adjusted when you reinstall the
batteries or other necessary case.
Press to enter the clock adjustment
mode.
Press or to change the value and press
or to move item.
Press to confirm the set and back to measurement mode.
Mat'L
Avg.
HRC
Avg.
HL
M
o
n
th
D
a
y
Year
Hour Minute
Ra 1.6
2 Test
2.1 Instrument preparation
Install the battery
Connect impact device
Turn on the power
To confirm the accuracy: Use the standard test block to check the tester
and make sure it work well.
2.2 Specimen preparation
Inappropriate specimen will bring the error measured results. It should be
the necessary processing and preparation according to the original
conditions of specimen. The preparation of specimen shall be annexed the
basic requirements for the following:
In the test surface preparation, should be avoided
cold, heat processing on the specimen surface.
Test surface should be flat with metallic luster, and
no oxide skin and other dirt.
The roughness of test surface should be Ra
≤
1.6.
The specimen must be of
sufficient mass and rigidity to
avoid the displacement or move in
test.
Generally, the mass of the
specimen is greater than or equal
to 5kg can be carried out the test
directly.
The specimen of 2 ~ 5kg need to
be clamped to fix, the specimen of
0.05 ~ 2kg should be coupled . If the mass is lighter than 0.05kg, it is
unfavorable to Leeb test type D.
The thickness of specimen shall be not less than 5mm, and thickness
of homogeneous layer (or surface hardening layer) is not less than
0.8mm.
If the test surface is not flat, the radius of test area should be larger
than 30mm. And should mount a appropriate support ring.
The specimen should not be with magnetic.
❶
❷
❸
❹
❶
❷
❸
❹
❺
❻
❼
2.3 Test Procedure
1) Loading
Simply load the impact device by sliding the loading
tube forward.
2) Locating
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.
3) Impacting (Measuring)
Trigger the impact by pressing the release button. The
hardness value will be instantaneously displayed.
4) Read test result
Read out the test result from LCD.
Note:
Generally, each measurement location of sample is conducted for the five tests.
The distance between any two impact point should be
≥
3 mm ; the distance
between impact position and the edge of the sample should be
≥
3 mm.
Direct Clamping Coupling
>5kg 2~5kg 0.05~2kg
Mat'L
Avg.
HRC
Avg.
HL
Hardness value: 786HLD;
The 3rd measurement point;
Mean value: 785HLD
Material Code:"01"(Steel & Casting Steel)
Conversions to HRC: 58.6HRC
Mean value of HRC: 58.5HRC
SCALE
2.5 Print Test Report
The tester can be linked to a wireless printer to print a
report.
Place the printer near the tester(within 2 m), and turn it
power on.
Press
for about 2 seconds, a report will be printed.
NOTE:
The original data in memory will be erased automatically when
the print completed.
T e s t R e p o r t
I m p a c t U n i t T y p e : D
M a t e r i a l : S t e e l & C a s t s t e e l
1 7 8 2 H L D 5 8 . 3 H R C
2 0 1 5 - 1 2 - 0 3 1 5 : 2 1
2 7 8 7 H L D 5 8 . 7 H R C
2 0 1 5 - 1 2 - 0 3 1 5 : 2 1
3 7 8 6 H L D 5 8 . 6 H R C
2 0 1 5 - 1 2 - 0 3 1 5 : 2 2
4 7 8 5 H L D 5 8 . 5 H R C
2 0 1 5 - 1 2 - 0 3 1 5 : 2 2
5 7 8 4 H L D 5 8 . 4 H R C
2 0 1 5 - 1 2 - 0 3 1 5 : 2 3
S = 5 H L D 0 . 4 H R C
X = 7 8 5 H L D 5 8 . 5 H R C
2 0 1 5 - 1 2 - 3 1 5 : 2 5
3 Setup
3.1 Material Code
In measurement mode, press button
to select the material code you will
test.
The material code is listed on the back
label
Note:
It is necessary to select the material
classification. When you did not know the
material type, you should reference the
related material handbook.
MAT
DIR
DIR
HRC
HRB
HB
HV
HSD
MPa
SCALE
SCALE
DIR
MAT
DEL
. 4 .
. 5 .
. 6 .
. 7 .
4 Maintenance
4.1 Routine maintenance
1) General considerations
Impact device should avoid collision, the weight stack in the use and
storage. Put into the case after use. The impact body should is in release
state when storage.
Should avoid close to the strong magnetic. Any of the components can't
stick any kinds of oil or lubricant.
2) Clean the impact body
General every 1~2 thousands of times after test, the impact device tube and
impact should be cleaned up.
Method: Rotate off the support ring, release and remove the impact body.
use the nylon brush to clean up the tube and impact body.
3) Replacement impact ball
For long-term use, the impact ball may be worn, it should be replaced when
affect the test precision.
