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.

Universal hardness tester ZHU250 with support table

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

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