DTEC DH90 Digital Portable Leeb Hardness Tester,3 Years Guanratee,RS232 Cable for PC,Display Figure and Character,Best Price

DH90 Portable Hardness Tester is an economical and foundational model among all, it is a international qualified leeb hardness testing machine conform to standard such as ZBN71010-1990, GB/T 17394-1998, JB/T9378-2001.
The equipment comes with standard RS232 communication cable, which enable it to connect to PC to do data print.
Similarly, It has dot matrix screen, which can display not only figure but also character. Customers who do the test without printing on-site, at the same time, considering about the purchase budget, this model is your right choice.

Working Principle:
When the impact body,with a certain weight,impacts against the specimen surface under the action of spring force,leeb hardness comes from the ratio of the impacting velocity(VA) and the rebounding velocity(VB) of the impact body by the moment the spherical testing tip is located at 1mm point from specimen surface.
With principle of electromagnetism,the permanent magnet in the coil of impact device produced an induced voltage, which is in proportion to the impact body velocity.
The leeb hardness values are calculated by the following formula:

HL=1000X(Vb/Va)




Main Application:

• Die cavity of molds
• Bearings and other parts
• Failure analysis of pressure vessel, steam generator and other equipment
• Heavy work piece
• The installed machinery and permanently assembled parts
• Testing surface of a small hollow space
• Material identification in the warehouse of metallic materials
• Rapid testing in large range and multi-measuring areas for large-scale work piece

  Testing Range in Different Materials with Different Impact Devices:

•  128×64 Dot Matrix LCD Large Digital screen, displaying both figures and character, with EL background light;

• 6 Exchangeable hardness scales: HRB, HRC, HV, HB, HS, HL, suitable to measure the hardness of all metallic materials;

• 7 impact devices available for special usage, automatically identify the type of impact devices;

• 48-350 groups storage capacity with impact times: 32-1,including single measured value, average value, testing data, impact direction, impact times, material and hardness scale etc;

• Come along with RS232 communication cable, connect machine into PC, enable to do data print;

• Optional multi-functional data processing software, ensure a higher testing requirement and data administration;

• Freely set limited hardness value, AUTO alarming when over-limited;

• High performance lithium battery, with continuous working time of 100 hours(EL light off) as well as real-time indication of power supply;

• Particularly ask for any operation instruction by the HELP key;

• Excellent after-sale service system for high quality products---two years’ guarantee and all life maintenance. Easy to buy and convenient to use.

Standard Packing List:

Optional Accessories:

Every set of our equipement will be carefully tested and double checked steps by steps before being packed and delivery,as we all know that among such fierce international competition,only 100% good quality and stable performance can finally attain the customer's trust.Hence,we will always put the equipment calibraton job in the first place while manufacturing.