Video Extensometer – VEM 100 Series

All the measurements and outputs are time stamped and can be archived for future reference.

Tinius Olsen’s VEM 100 series of video extensometer modules are engineered to measure higher levels of strain (>10%) in tensile, shear, compression, and flexural modes. The units are completely combined with the testing machine and results-reporting software, supporting many gauge length click and drag placements, strain rate control and real-time results during and throughout the test.

The VEM 100 series directly matches all Tinius Olsen testing machine frames. It is mounted using a stabilized carbon fiber arm with integral X, Y and Z fine positioning adjustment for ideal measuring performance.

The unit can be mounted at the rear or front of a testing machine, right or left in keeping with operator comfort and efficiency of use. The extensometer on its mounting arm can be rapidly moved away from the test area, guaranteeing total operator access for specimen loading and grip or accessory changes, and then equally swiftly swung back into position, locating precisely using the magnetic homing position – simple, quick, and precise.

The integral lighting strip guarantees repeatability in tests regardless of lab conditions yet requires no special light sources or red colors, being easily regulated by the user modifying intensity as required, to guarantee a stable light environment. These adaptable extensometer modules are available in a range of different performance configurations each compatible with Tinius Olsen’s Horizon and VSS materials testing software, whether the Basic, Standard or Advanced option.

The precise camera, lens and data acquisition technology delivers zero gauge length error every time and rapid application of gauge marks, including for the measurement of rotation (to monitor specimen alignment) during testing. Calibration is digitally embedded but, for reassurance, can be verified at any time using the standard traceable gauge block supplied.

Key Features

  • Capable of measuring up to 1000% strain
  • Non-contacting video extensometer solution
  • One extensometer measures in tension, flexural, compression, shear modes
  • Supports rapid gauge length change 10 mm, 25 mm, 50 mm, 100 mm, 200 mm
  • No risk of damage because of violent specimen breaks
  • Offers a permanent record for recall of the test in video format with full resolution embedded strain data
  • Complies with the requirements of ASTM E83 class B1, ISO 9513 class 0.5, and GB/T 12160 class 0.5

For a majority of applications, a single VEM extensometer module meets the need, but up to four extensometer modules can be synchronized to function together capturing four concurrent events.

The VEM Video Extensometer is the future of extensometery just because it boosts productivity through speed of use, enhances repeatability, and aids traceability via the embedded strain data video stored as part of the results data set. Furthermore, there are no mechanical parts under strain when exposed to the release force at the specimen break point.

VEM model Maximum axial tensile strain range (%) at specified gauge length (mm)¹ Maximum axial compressive strain range (%) at specified gauge length (mm) ¹ Maximum transverse gauge length (mm)² Typical extension resolution (µm)³ Maximum test speed (mm/min)² Minimum specimen width for measurements (mm) Field of view (mm)
10 25 50 100 200 10 25 50 100 200 Axial Transverse
VEM-101 280 70 - - - 40 40 - - - 10 0.3 1350 1.5 4.0 57 x 16
VEM-102 530 170 50 - - 40 40 40 - - 19 0.4 2100 2.4 7.0 98 x 27
VEM-103 840 300 120 25 - - 40 40 40 - 29 0.6 3200 3.4 10 150 x 42
VEM-104 1000 460 200 65 - - 40 40 40 - 43 0.9 4600 5.0 14 220 x 62
VEM-105 - 800 360 150 40 - - 40 40 40 70 1.4 7200 8.0 23 350 x 100
VEM-106 - 1000 500 220 70 - - 40 40 40 65 1.8 9400 11 30 460 x 100
VEM-107 - - 800 360 150 - - - 40 40 - 2.8 14000 16 - 700 x 100

Video Extensometer – VEM 100 Series

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