Features

LCD display of 128×64 matrix with back-light, showing all functions and parameters.

Converts to all common hardness scales (HV,HB,HRC,HRB,HRA,HS).

English displaying and easy and convenient menu operation.

Powerful PC Software available and USB 2.0 interface.

7 types of Impact Device optional, which don't need to be recalibrated when changing them.

Memory of 600 groups data（impact times: 32～1）.

Lower limit setting and sound alarm.

Material of “cast steel” is added; HB values can be read out directly when D/DC impact device is used to measure “cast steel” work piece.

Printer be separated from main unit and copies of testing results can be printed as required.

In-built Smart Li lon rechargeable battery while USB connected and charging controlling circuit.

Inbuilt function of Software Calibration.

Two ways of switching off by key and automatically

Specifications

Hardness scale                           HL, HB, HRB, HRC, HRA, HV, HS

Memory                                      48～600 groups （impact times: 32～1）

Measuring range                        HLD（170～960）See below table 1 and table 2

Accuracy                                    ±6HLD (760±30HLD) error of displayed value

                                                   6HLD (760±30HLD) repeatability of displayed value

Standard Impact Device              D

Optional Impact Devices             DC/D+15/G/C/DL

Max. Workpiece Hardness           996HV(For Impact Devices D/DC/DL/D+15/C)

                                                     646HB(For Impact Device G)

Min. Radius of Workpiece (convex/concave)   Rmin = 50mm (with special support ring Rmin= 10mm)

Min. Workpiece weight                2~5kg on stable support

                                                     0.05~2kg with compact coupling

Min. Workpiece thickness            5mm (Impact Devices D/DC/DL/D+15)

                                                     1mm (Impact Device C)

                                                     10mm (Impact Device G)

Min. thickness of hardened surface  0.8mm

Power                                           AA Size 1.5V

Continuous Working time           approx. 100 h (no back light off)

Operating temperature                0~40℃

Relative humidity                       ≤90%

Overall dimensions                    152×84×34mm (main unit)

Weight                                        0.3kg (main unit)

Datapro for Hardness tester THL280

The Impact Device of Hardness Tester

2.1.4 Different Types of Impact Device