PLUS Hardness Tester DHT-200 1. Summary DHT-200Plus Leeb hardness tester, based on the principle of Leeb theory, can be used for hardness testing of various metals. With the feature of compact size, it is suitable for working on various circumstances. The Leeb hardness values can be easily converted to HRC, HRB, HV, HS and so on.
PLUS Hardness Tester DHT-200 Figure 1 Voltage features of output signal The Leeb hardness values can be converted to other hardness scales directly, such as HV, HRC, HRB, HB and HS. 2.3 Available Functions ●320×240 matrix TFT Color LCD ●Auto connects to 32 bits / 64 bits computer system. ●100 files x 100 data can be stored.
PLUS Hardness Tester DHT-200 3. Pre-treatment of work piece To get the accurate measuring results, pre-treatment of work piece is required. 3.1 Work piece surface Temperature of work piece should be less than 80℃; The surface roughness requirements are listed in table 3.1.1 Table: 3.1.1 Impact Device Work piece of surface roughness...
PLUS Hardness Tester DHT-200 Tale: 3.3.1 Impact device Minimum depth of surface hardened layer D, DC, D+15 0.8mm 0.2mm 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.
PLUS Hardness Tester DHT-200 5.2.2 Display area Prompt: Press the to change to big digital display. 7 Power indication 8 Work piece mark 9 Print indication 10 Impact device type 11 Max value of testing result 12 Min. value of testing result 13 Avg.
PLUS Hardness Tester DHT-200 5.2.3 Keypad 1.Power key 1.Power on or off the instrument 1.Left Key 1.Adjust the menu items 2.Work piece mark key 2.In measuring status, adjust the mark of work piece (ABCDE) 1.Right key 1.Adjust the menu items 2.Work piece mark key 2.In measuring status, adjust the mark of work piece (ABCDE)
PLUS Hardness Tester DHT-200 6. Operation instruction 6.1 Power on Fit on the impact device firstly, press key to power on. The following information is displayed. 1. Instrument model, Series No., Software version 2. Parameters of last setting : Prompt If the impact device is not fitted properly, the instrument will not be able to complete self-checking and will give out the Notice.
PLUS Hardness Tester DHT-200 -Press the key and the key to enter MEASURE- DIRECTION. -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. Prompt: During measurements, the actual impacting direction must conform to the one selected.
PLUS Hardness Tester DHT-200 6.3.3 Average times settings It is extremely necessary to work out the average measuring values in leeb's hardness testing. Different measuring times between 2~8 are selected according to users’ different requirements. - Press the key and the key to enter MEASURE- AVERAGE.
PLUS Hardness Tester DHT-200 -Press the key and the key to enter FILES--SETUP NEW FILE, -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. 6.4.2 Storage settings Set the data auto-saving state during measurement by turning on or off. When data saving is set on “auto saving”, there will be a corresponding indication mark on the screen, and the measuring values will be stored in...
PLUS Hardness Tester DHT-200 -Press the key and the key to enter FILES--PRINT FILE, -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. Prompt: For safety of data stored in the main unit, it is suggested that users should transfer all the saved data to PC or print them out after the measurement.
PLUS Hardness Tester DHT-200 -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. Prompt: The deleted files will never be able to come back, so please be careful about your operation. 6.5 Other settings Various optional settings are available for users in the “option”...
PLUS Hardness Tester DHT-200 -Press the key and the key to enter OPTION--SET TOLERANCE, -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. 6.5.3 Calibration settings Measuring error can be usually caused by impact device abrasion or changing another impact device.
PLUS Hardness Tester DHT-200 -Press the key and the key to enter OPTION--AUTOSHUTDOWN, -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. : Prompt It is not suggested to use the function of “OFF SHUTDOWN”, which consumes more power of batteries, even out of usage.
PLUS Hardness Tester DHT-200 -Press the key and the key to enter OPTION--SET KEY SOUND, -Press the key to enter this item, -Press the key or key for setting, -Press the key to confirm. 6.5.7 Language settings Multi-languages are offered to clients for convenience in usage. -Press the key and the key to enter OPTION--LANGUAGE,...
PLUS Hardness Tester DHT-200 6.6 Usage of integrated printer DHT-200 is equipped with micro-printer used for printing out the Plus measuring or saved data; it is a printer with one line 16 characters, baud rate 9600. 6.6.1 Installation of printing paper 1.
PLUS Hardness Tester DHT-200 6.8 Deleting of wrong measuring data During measurements, some measuring values are obviously error data; press the key to delete these values conveniently. 7. Repairing and Maintenance In order to keep the accuracy and reliability of the instrument, it is necessary of timely evaluation and maintenance.
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PLUS Hardness Tester DHT-200 2. We supply warranty of 24 months (excluding the easy damaged parts, such as impact devices, cable, Digital display, shell, suit case), and we will be in charge of the repairing and maintenance of our instrument for its whole life.
PLUS Hardness Tester DHT-200 8. Packing list The standard delivery includes: Code Content Quantity Main unit DHT-200 1 set PLUS Impact device (standard D) including: big/small support rings 1 set and brush Standard Leeb hardness test block 1 Pc USB connecting cable 1 Pc Charger 1 Pc...