The videoXtens 3-300 includes three high-resolution cameras. The innovative ZwickRoell array technology combines the fields of view (FOV), creating one large FOV with high resolution. Unique: through connection to the crosshead, the gauge marks are always automatically centered in the field of view and the measurement range is optimally utilized. Extensions outside the measurement length do not limit the measurement range.
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testControl II_Hydraulik-PH_250 kN_Typ 8594_videoXtens 3-300

videoXtens 3-300

videoXtens 3-300 - innovative and unique

  • videoXtens 3-300 includes three high-resolution cameras. The innovative ZwickRoell array technology combines the fields of view. This provides one large field of view with high resolution.
  • Unique: Through connection to the crosshead, the gauge marks are always automatically centered in the field of view (FOV)—the measurement range is optimally utilized.-> even when an extreme amount of material slips out of the specimen grips, the measurement range is not restricted.

Optimal interaction and high level of accuracy of the entire testing system

  • Mounting with low-vibration, stable support brackets. Easy alignment with the measurement range through the ergonomic height adjustability on the mounting.
  • videoXtens and the ZwickRoell temperature chamber are optimally adapted to each other. Temperature control and air distribution in the temperature chamber are optimized in such a way that the videoXtens resolution is only minimally affected, even at temperature.

Every specimen counts

  • Cost savings in specimen material: No specimen is wasted due to break outside of L0. With the test re-run option and pattern recognition L0 can be moved retrospectively and the test can be recalculated, whereby the break then lies within the L0.
  • Alternative: Strain distribution in the above-mentioned option automatically sets the L0 in the range of the highest strain, if various gauge marks were set prior to the test.

Key Advantages and Features

Simple operation

  • Easy to operate
  • Automatic gauge-mark recognition and acquisition of initial gauge-length L0.
  • Tamper-proof: anti-tamper paint is applied to the lenses for the complete system so nothing can be adjusted. An important requirement for reliable test results.
  • Easy alignment to the specimen: videoXtens is centrally aligned to the gauge marks via the connection to the crosshead (option).
  • Compensation for different specimen thicknesses plus testing shear specimens.
  • Wear-free system = low-maintenance. The systems also feature an extremely long service life.
  • Connection to non-ZwickRoell machines via ±10V interface.

High accuracy and repeatability

  • High accuracy and repeatability
  • Extensometers mounted using stable, low-vibration support arms.
  • Housing provides protection against dirt and dust and inadvertent misalignment of the components.
  • Exact synchronization of all measurement channels.
  • Specially developed lighting provides continuous high-quality contrast ratios on the specimen, even with varying environmental conditions.
  • Industrial-quality cameras and high-quality, low-distortion lenses.
  • ZwickRoell extensometers exceed standards requirements, and are calibrated over the entire measurement range to ISO 9513 in the corresponding accuracy class.
  • The videoXtens 2-120 HP and videoXtens biax 2-150 HP are calibrated in accuracy class 0.5 to ISO 9513, with the first calibration point starting at 20 μm.
  • Additional calibration data-points for traceable, standard-compliant Young's modulus determination on plastics to ISO 527 (e.g. via additional calibration value at 25 µm) with the videoXtens 2-120 HP.
  • Compliance with strict requirements for determination of the tensile modulus to ISO 527 Appendix C (videoXtens 2-120 HP and videoXtens biax 2-150 HP).
  • The videoXtens biax 2-150 HP measures the change in width and Poisson’s ratio with an incomparable accuracy never before seen with non-contact extensometers.

Automatic centering

  • Automatic centering adjustment
  • videoXtens tracks at half crosshead speed via the connection to the crosshead, keeping the testing operation automatically in focus and making optimum use of the measuring range (larger measuring range possible).
  • This results in increased system measurement accuracy; the gauge marks shift less in the image and are captured in the center of the lens (low lens distortion).

Testing without gauge marks

  • Pattern recognition: testing with software gauge marks
  • The innovative pattern-recognition algorithm allows virtual gauge marks to be applied to the specimen. The gauge marks can be changed retrospectively and re-calculated (Test Re-Run option). It doesn't get any more convenient!
  • The essential requirement is for a pattern on the specimen - either a natural pattern due to a structured surface or an artificial pattern which can quickly be applied using a marker spray or by stippling.

Software Options 

testXpert III testing software offers various options for precise, traceable non-contact extension and strain distribution measurement. 

Test re-run

The optional Test ReRun module enables subsequent recalculation of strain on the basis of an image series recorded during a test, using a different initial gauge-length (provided multiple markings are present). This can be particularly advantageous in component testing, for example, when it is necessary to evaluate local strain at different locations, or in standard tensile tests when specimen necking has occurred outside the original initial gauge-length.

Automatic symmetrical adjustment of strain around necking to ISO 6892-1, Annex I

The recalculated strain can, of course, be synchronized subsequently with the other measurement values via the testXpert testing software.

Strain distribution

The Strain Distribution option enables determination of local strains at multiple measuring locations along the specimen gauge-length. These are available as channels in testXpert. Up to 16 measuring locations are automatically recognized and evaluated during the test. This option also allows automatic real-time symmetrical adjustment of the initial gauge-length around the necking (to ISO 6892-1, Annex I).

Video Capturing

Video capture is a recording of the test (without retrospective recalcualation). The recording is synchronized with the measured curve, enabling the test to be viewed retrospectively. The option includes no hardware, as recording and synchronization take place entirely via the videoXtens system.

2D dot matrix

This option allows two-dimensional measurement of dots applied to a planar specimen surface. This enables determination of local strains and specimen inhomogeneities under load. X and Y coordinates, as well as the distances between dots, are available as measured values.

Up to 100 measurement dots can be measured in any desired arrangement or in matrix form. Display in testXpert III is limited to 15 channels.

This option uses only one camera for measurement; any other cameras present are switched off beforehand.

Second measurement axis option 

  • Pattern recognition: testing with software gauge marks
  • The innovative pattern-recognition algorithm allows virtual gauge marks to be applied to the specimen. The gauge marks can be changed retrospectively and re-calculated (Test Re-Run option). It doesn't get any more convenient!
  • The essential requirement is for a pattern on the specimen - either a natural pattern due to a structured surface or an artificial pattern which can quickly be applied using a marker spray or by stippling.

Deflection measurement 

videoXtens can also be used for flexure tests. There are several options for measuring specimen deflection, depending on the type of test and the specimen condition and properties:

  • Measurement using incident light via marks on the specimen
  • Measurement using backlight on the specimen lower edge
  • Measurement of deflection in the test axis or of the polynomial approximation of the curve

Maximum deflection that can be measured: with videoXtens the maximum deflection corresponds to the FOV; with videoXtens Array to 1/3 of the total FOV (in this case deflection is measured with one camera only).

Technical Overview

videoXtens 3-300

Type

videoXtens 3-300

Item No.

1043970

Field of view (FOV)

With test area width 440 mm [AllroundLine]

320 x 110

mm

With test area width 640/1040 mm [AllroundLine]

300 x 90

mm

Initial gauge length

With test area width 440 mm [AllroundLine]

5 ... 250

mm

With test area width 640/1040 mm [AllroundLine]

5 ... 240

mm

Measurement travel, max.

With test area width 440 mm [AllroundLine]

310 - initial gauge length

mm

With test area width 640/1040 mm [AllroundLine]

290 - initial gauge length

mm

Resolution at ambient temperature

0.5

µm

Resolution to ISO 9513 in the ZwickRoell temperature chamber

At -20 ... +250 °C

0.6

µm

At -40 °C

0.9

µm

At -55 °C

1.2

µm

System distance (distance between extensometer reference plane and center of test axis):

Table-top testing machine, test-area width 440 mm

450

mm

Table-top/floor-standing testing machine, test-area width 640/1040 mm

570

mm

Frame rate / measured-value acquisition-rate, max.

500

fps / Hz

Test speed, max.

1000

mm/min

Dimensions

Height

350

mm

Width

415

mm

Depth

140

mm

Specimen thickness

0 ... 20

mm

Weight, incl. tunnel, approx.

15

kg

Accuracy class

1 to EN ISO 9513

Scope of delivery

Measuring head with three digital cameras, incl. three lenses and optical filter disc

Software for image acquisition and evaluation

Accessory case with alignment and marking aids

INC module (for tC: RS module)

New testing technology for plastics laboratory

Raw material manufacturers, processors and users in the field of polymers have trusted the expertise of polymerphys IK for over 12 years. To support further expansion of their testing services, the company chose a testing machine with temperature chamber from ZwickRoell.
polymerphys IK GmbH
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