CONTENTS
1.Summary ...............................................................................1
2. Principle of Leeb hardness testing method ............................1
2.1 History of Leeb hardness testing method.................................. 1
2.2 Definition of Leeb hardness...................................................... 1
2.3 Available Functions .................................................................. 2
2.4 Symbol of Leeb’s hardness values............................................. 2
3. Pre-treatment of work piece .................................................3
3.1 Work piece surface .................................................................. 3
3.2 Weight of work piece ............................................................... 3
3.3 Work piece surface hardened layer .......................................... 3
3.4 No strong magnetism on the work piece surface....................... 4
4. Selection and performance of impact device .........................4
4.1 Selection of impact device........................................................ 4
4.2 performance of impact devices................................................. 4
5. Functions of DHT-100Plus......................................................5
5.1 Technical specifications............................................................ 5
5.2 Nomenclature of DHT-100Plus.................................................. 5
5.2.1 Main unit............................................................................................. 5
5.2.2 Display area......................................................................................... 6
5.2.3 Keypad ................................................................................................7
6. Operation instruction............................................................8
6.1 Power on ................................................................................. 8
6.2 Parameters setting................................................................... 8
6.3 Measure .................................................................................. 8
6.3.1 Impact direction settings .................................................................... 8
6.3.2 Material and hardness scales settings ................................................9
6.3.3 Average times settings......................................................................10
6.3.4 Tolerance ..........................................................................................10
6.3.5 Calibration......................................................................................... 10
6.3.6 Standards .......................................................................................... 10
6.4 Files management.................................................................. 12
6.4.1 New file settings................................................................................12
6.4.2 Storage settings................................................................................. 12
6.4.3 Print file settings ............................................................................... 13
