videoXtens 1-270 P extensometer

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The videoXtens 1-270 P for high-extension materials

The videoXtens 1-270 P covers a wide measurement range and is therefore excellent for high-extension materials or specimens with high initial gauge length.

Even specimens prone to whipping or specimens with high break energy can be tested up to break, without damaging the videoXtens.
Minimal operator influence and easy operation: the complete system is optimally configured for these applications; no additional lens adjustments are necessary and scale settings are retained.
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. There are no blind spots caused by specimen grips.

Additional videoXtens advantages & features

The videoXtens offers additional advantages & features. All general advantages and even more information on the ZwickRoell videoXtens systems can be found here.

Typical videoXtens 1-270 P applications

Elastomer testing to ISO 37, ASTM D412 or DIN 53504

Specimens prone to whipping can be tested up to the point of break without damaging the extensometer.
Connection to the crosshead ensures that the gauge marks are always centered and that the measuring range is optimally used.
Unobstructed view of the specimen: no blind spot caused by the specimen grip, since the videoXtens is centrally aligned and tracked.
Sensitive specimens are not influenced by knife edges since tests are performed without contact.
Accuracy Class 1: modulus values can also be determined in the initial measuring range, e.g. stress at 10% strain.
High accuracy also under temperature conditions when using ZwickRoell temperature chambers.

Rope testing (textiles)

Ropes that are prone to whipping can be tested up to the point of break without damaging the extensometer.
Connection to the crosshead ensures that the gauge marks are always automatically centered and that the measuring range is optimally used.
Unobstructed view of the specimen: no blind spot caused by the specimen grip, since the videoXtens is centrally aligned and tracked.
Sensitive specimens are not influenced by knife edges since tests are performed without contact.
Accuracy Class 1: modulus values can also be determined in the initial measuring range, e.g. stress at 10% strain.
High accuracy also under temperature conditions when using ZwickRoell temperature chambers.

Film test to ISO 527-3, ASTM D638

Accuracy class 1 (at least from 0.24 mm measurement displacement), so modules in the initial measuring range can also be determined.
Sensitive specimens are not influenced by knife edges since tests are performed without contact.
Saving time in the research field: the test re-run and pattern recognition options can be used to subsequently change the gauge length and recalculate the test. This allows, for example, the break to be placed within the gauge length or other measuring lengths/positions to be evaluated.
Pattern recognition: Through dotting or stamping, a pattern is quickly placed on the entire specimen.
Connection to the crosshead ensures that the gauge marks are always automatically centered and that the large measuring range is optimally used. Slipping of the film specimens during the test does not restrict the measurement range and therefore does not have to be taken into account.

Advanced functionality: simply activate and see more

The testing software gets even more out of the camera images than just the change in distance between two measuring points. These intelligent options simply see more:

Test Re-Run: re-calculate instead of re-testing

The test re-run function can be used to virtually repeat and recalculate the test with a modified initial gauge length. You save time on specimen preparation and testing and can run different evaluations on one and the same specimen.

During the test, the testing software records the image series. You can later use these to change the size and position of the initial gauge length as required. One click starts the recalculation and all characteristic values are recalculated on the basis of the new gauge length. Each recalculation is displayed separately, making comparisons simple and clear.

Validate invalid specimens after the test, change the initial gauge length in size or position: videoXtens Test Re-Run

Using the drag & drop function, the gauge length is positioned around the break based on the image recordings and the test is re-evaluated

Strain distribution: every specimen counts

A break outside the gauge length causes costs and additional time for specimen preparation and retesting. This can be prevented with the strain distribution option.

During the test, the testing software automatically places the gauge length symmetrically around the break point.

The workaround offered by ISO 6892-1 in Annex I to validate breaks outside the gauge length is also activated effortlessly by our software; calculation and validation according to standard specifications run automatically and in real time. No need to manually measure and recalculate the specimen as was the case before.

Strain distribution: the break is within the gauge length and can be evaluated

Break outside the gauge length: the test is invalid

Without strain distribution: the break is outside the gauge length, the test is invalid

2D dot matrix

Up to 100 measuring points can be set and measured in any arrangement or in the form of a grid. In this way, local strains and inhomogeneities of a specimen under load are determined. X and Y coordinates as well as the distances between dots are available as measured values.

The measured values can be easily exported or displayed as channels directly in testXpert. The prerequisite is that all measuring points are applied to a flat specimen surface, as this is a two-dimensional measurement. Typical applications includes tests on components or multiaxial tensile tests.

Here, the video extensometer records 16 local strains in a multi-axis tensile test

Flexure test: deflection measurement

The videoXtens offers different options to measure deflection. A measuring plunger is often placed under the specimen for comparability with measurements using sensors or transducers. The measurement displacement during the test is measured by videoXtens using stick-on gauge marks.

Alternatively, it is also possible to measure directly on the specimen edge: either by applying a mark to the flexure specimen or by using a backlight behind the specimen, which makes the lower edge of the specimen visible and measurable for the videoXtens. In addition to the deflection in the test axis, the polynomial approximation of the curvature can also be determined.