13
3.2 Dimension size and weight
3.2.1 Dimension
209
×
85
×
45mm
(main unit)
3.2.2 Weight
approx. 0.6kg (main unit);
Table 5
No.
Type of
impact
device
hardness value of
standard Leeb
hardness block
Error of
displayed
value
Repeatability of
displayed value
1
D
760
±
30HLD
±
6 HLD
6 HLD
2
DC
3
DL
4
D+15
5
G
6
E
7
C
4 Testing
4.1 Preparation and Inspection prior to testing
4.1.1 The preparation of workpiece surface
The preparation for workpiece surface should comply with the relevant
requirements specified in table 3
⚫
During the preparation for sample, the affect to surface hardness of
sample caused by overheating, cold processing and etc. should be
avoided as far as possible.
⚫
If the surface to be tested is too rough, measuring error will appear. So
the surface of the sample must have metallic luster and the surface must
be flat, smooth and have no oil dirt.
⚫
Curved surface: it is better that the testing surface of workpiece is plane.
When the curvature radius R of the curved surface to be tested is less
