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Tale: 3.3.1
Impact device
D, DC, D＋15
C
3.4 No strong magnetism on the work piece surface
Strong magnetism will affect the circuit winding greatly, and affect the
accuracy of testing results, so it is required to avoid strong magnetism during
testing.
4. Selection and performance of impact device
4.1 Selection of impact device
Before testing, users should correctly select the proper impact devices
according to testing requirement, work piece size and shape. For details
please refer to appendix 1.
4.2 performance of impact devices
a) Loading
Press down the loading tube to lock the impact body.
b) Placement
Place the support ring on surface to be measured and make sure the
distance between two test points should be no less than 3mm.
c) Testing
Trigger the release button while the work piece and the impact body
are all stable, and the starting force coincides with the axis of the
impact body.
Hardness Tester DHT-100
Minimum depth of surface hardened layer
4
PLUS
0.8mm
0.2mm
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