Daekyung DTR-300N Operation Manual - Page 14

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9.2 Reference Table 2.

Calibration value when a cylinder-shaped specimen is tested as C, A, D scales
1/4"
Measured
(6.4mm)
Hardness
Calibration value (Actual hardness = Measured hardness + Calibration value)
20
6.0
25
5.5
30
5.0
35
4.0
40
3.5
45
3.0
50
2.5
55
2.0
60
1.5
65
1.5
70
1.0
75
1.0
80
0.5
85
0.5
90
0.5
3/8"
1/2"
5/8"
(10mm)
(13mm)
(16mm)
4.5
3.5
2.5
4.0
3.0
2.5
3.5
2.5
2.0
3.0
2.0
1.5
2.5
2.0
1.5
2.0
1.5
1.0
2.0
1.5
1.0
1.5
1.0
1.0
1.0
1.0
0.5
1.0
1.0
0.5
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0
DAEKYUNG TECH & TESTERS Mfg. CO.,LTD
Cylinder Diameter
3/4"
7/8"
(19mm)
(22mm)
2.0
1.5
2.0
1.5
1.5
1.5
1.5
1.0
1.0
1.0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
1 "
1 1/4"
1 1/2"
(25mm)
(32mm)
(38mm)
1.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.5
1.0
0.5
0.5
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0.5
0
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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