ZHU250 hardness tester

Robust expertise

This universal hardness tester has an excellent price-performance ratio and can be used for classical hardness testing methods on metals and plastics (1 to 250 kg). Outstanding features include above-average test area size, measurement free from parallax error (thanks to measurement lines integrated into the screen optics), a fully automated test sequence and a highly accurate closed-loop system, together with excellent depth of field.

Range of application

The Zwick ZHU 250 universal hardness testing machine is suitable for the following hardness testing methods.

  • Metals
  • Vickers (HV) as per EN ISO 6507, ASTM E92
  • Knoop (HK) as per ISO 4545, 4546
  • Brinell (HB) as per EN ISO 6506, ASTM E10
  • Rockwell (HR) as per EN ISO 6508, ASTM E18
  • Vickers depth measurement (HVT) as per VDI/VDE 2616-1
  • Brinell depth measurement (HBT) as per VDI/VDE 2616-1
  • Plastics
  • Ball indentation hardness to ISO 2039-1

Advantages and features

  • A rugged, high-accuracy hardness testing machine for many different applications.
  • Intuitive menu navigation via large color display and keyboard.
  • Load application up to 250 kg via closed-loop system.
  • Large standardized test area (250 x 300 mm).
  • Automatic test cycle.
  • Fast, easy, precise handling.
  • Optimum test-result reproducibility.
  • Motorized changeover between lens and indenter position.
  • Robust digital measuring system for convenient, high-accuracy measurement..
  • Large, highly tempered, non-reflective focusing screen (diameter 150 mm).
  • Comprehensive range of lenses with magnifications from 15x to 520x.
  • Online display of force-time or indentation depth-time diagrams.
  • Automatic display of measured quantities (diagonals/indentation depths) and hardness value.
  • Automatic travel to set focal-plane when optics are swiveled into position.
  • Direct printer connection (LPT1).
  • Individual accessories directly matched to the relevant testing requirements.
  • Conversion of hardness values as per current standard DIN 18265.
  • testXpert: transfer (export) of data to QA programs, report generation etc. etc.

Technical data and test methods

Basic device

Item no.

024484

Test load, min.

1

kg

Test load, max.

250

kg

Included in the scope of delivery

Holding down clamp

Optical indentation measuring device

Focusing screen

Test method

  • Vickers: HV1, HV2, HV3, HV5, HV10, HV20, HV30, HV50, HV60, HV100, HVT
  • Knoop: HK1
  • Brinell: HBW 1/1 ... 1/30 - HBW 2.5/6,25 ... 2.5/187.5 - HBW 5/25 ... 5/250 - HBW 10/100 ... 10/250 and HBT
  • Rockwell: HR scales A, B, C, D, E, F, G, H, K, 15N, 30N, 45N, 15T, 30T, 45T
  • Ball indentation hardness: H - 49.03 N / 132.39 N / 357.9 N / 961.0 N

Voltage

Adjustable, 100 ... 250

V

Dimensions:

Height, approx.

1200

mm

Width, approx.

270

mm

Depth, approx.

870

mm

Weight, approx.

300

kg

Top