multiXtens

multiXtens is a versatile, high-resolution extensometer. Thanks to special sensor arms, it can be used for tensile, compression, flexure, and cyclic tests. multiXtens is used mainly for tests on plastics, composites, elastomers, and hard foam, as well as for tests on metals or fiber-reinforced composites.
T2_multiXtens_safety shield open_w-operator_+FO

Key Advantages and Features

It's extreme level of accuracy together with its very large measurement range makes multiXtens ideal for varying requirements that place a wide variety of demands on an extensometer system (for example, plastics and elastomer testing, or plastics and metals testing).

Advantages and features

  • Can be used up to specimen break, even with high loads and brittle specimen material
  • Highest level of precision even when measurement displacement is high (up to 700 mm) and can be used with temperature chambers
  • Accuracy Class 0.5 to EN ISO 9513
  • Maximum error ±1 μm in the differential displacement measurement between two measurement points in the range of 20 μm to 200 μm, fully fulfilling the additional requirement stipulated by ISO 527-1 (2011)
  • multiXtens is already calibrated from a measurement travel of 20 µm in Class 0.5
  • The low drag force and the ability to adjust the contact force of the sensor arms as needed means you can test sensitive specimens reliably and with traceability
  • Deformation of the specimen is recorded in the elastic and plastic deformation range throughout the entire test
  • Automatic measurement of the space between the specimen grips with subsequent centering of the multiXtens measurement carriage
  • multiXtens is suitable for cyclic tests
  • Compression and flexure tests can be performed by simply changing the sensor arms
  • Tiltable knife edges prevent damage to the sensor arms and knife edges at specimen break
  • The knife edges can be set for round or flat specimens through simple rotation
  • Special knife edge geometry makes multiXtens suitable for both round and flat specimens
  • A third measurement-carriage enables fully automatic fitting of transverse strain and fine strain extensometers to multiXtens. This is very important for accurate determination of Youngs Modulus and determination of r- and n-values, as well as Poisson's ratio
  • The sensor arms can be changes without tools and are automatically recognized by multiXtens.
  • Operation with temperature chambers possible using suitable sensor arms
  • Fully automated system: Measurement of the space between the specimen grips; centering of the multiXtens measurement carriage; automatic attachment and removal of the sensor arms; automatic setting of the gage length
  • multiXtens is approved for closed loop strain rate control to ISO 6892-1 (2009) Method A (1) and to ASTM E8 – 09 Method B

Function description

The strictly modular construction of this universal extension measuring system enables it to be used for a variety of test tasks.

  • The most important components are as follows:
  • Guide system with integrated measurement carriages
  • Measuring heads
  • Easy-to-replace sensor arms
  • Central measurement and control system

The guide system has two integrated measurement carriages that can be moved independent of one another. Each measurement carriage has a complete measurement carriage drive and a microprocessor system, which records and prepares the status and measurement data of the measuring heads. Furthermore, it controls the measurement carriages/measuring head drives and monitors their safety limit values.

Even the transmission of measurement, control, and status signals between the measurement carriages, measuring heads, and central measurement and control unit is handled by the microprocessor system.

The knife edges can be easily interchanged and are inserted in the mechanical measuring heads from the front. The type used depends on the type of test, the required temperature range, and the geometric dimensions of the testing system.

Technical Overview

  • multiXtens fulfills accuracy class 0.5 to EN ISO 9513.
  • multiXtens is approved for closed loop strain rate control to ISO 6892-1 (2009) Method A (1) and to ASTM E8 - 09 Method B

multiXtens for mounting on an AllroundLine testing system

Item No.

325063

325135

Base unit

With 2 measurement carriages for connecting the sensor arms for extension measurement

With 2 measurement carriages for connecting the sensor arms for extension measurement

Third measurement carriage for connecting a fine strain or transverse strain extensometer

Retrofitting possible

Included

Initial gage length (dependent upon the sensor arms used)

10 (5) to 700 (695)

0.02 to 0.04

10 (5) to 700 (695)

Measurement displacement, max. (∆L + L0)

700 - L0

700 - L0

mm

Drag force

≤0.02

≤0.02

N

Specimen thickness, max.

30

30

mm

Speeds:

Measurement speed, max.

500

500

mm/min

Return speed, max.

800

800

mm/min

Accuracy with sensor arms with

Length of 300 mm

Accuracy Class 0.5 to EN ISO 9513

Accuracy Class 0.5 to EN ISO 9513

Length of 450/600 mm

Accuracy Class 1 to EN ISO 9513

Accuracy Class 1 to EN ISO 9513

Dimensions without measuring heads:

Height

1285

1285

mm

Width

235

235

mm

Depth

405

405

mm

Weight, approx.

52

52

kg

Electrical connection:

Voltage

100 to 240

100 to 240

V, 1Ph/N/PE

Power frequency

50/60

50/60

Hz

testXpert II minimum version

V 1.4

V 1.4

Included in the scope of supply

Expanded remote control (for attaching the sensor arms)

Expanded remote control (for attaching the sensor arms)

Options for Accurate and Reproducible Measurements with multiXtens

 Transverse strain extensometer (contacting, absolute  measuring)

  • 90° swivelable transverse strain extensometer with measurement in 1, 2, or 4 cross-sectional planes (each available in two resolutions)
  • 15° swivelable transverse strain extensometer with measurement in 2 cross-sectional planes each available in two resolutions, in connection with in fine strain extensometer only this type is possible).

Fine strain extensometer (contacting)

  • Inductive extensometer with combined signal or two separate signals for fine-strain measurement

videoXtens transverse strain extensometer (optical)

  • When used with multiXtens the result is an ideal system combining contact and optical strain measurement

Key Advantages and Features of videoXtens Transverse Strain Extensometers  

Advantages and features

  • The system is wear-free due to the fact that no mechanically movable components are used. Costs for wear parts and continuous maintenance do not apply.
  • The videoXtens transverse strain extensometer does not need any specimen markings. It uses a highly developed edge detection algorithm. The absolute specimen width changes over time. It is determined using the specimen edges for up to five different positions.
  • videoXtens provides non-contact, high-resolution measurement of change in width, enabling determination of r values to ISO 10113.
  • The width can be determined at one or more locations (measuring lines). This allows measurement of offset yields in tensile tests to ISO 6892-1, together with r & n-values to ISO 10113 and ISO 10275.
  • The no-contact measurement method means that no contact forces emerge in the transverse direction. This makes it possible to test thin and sensitive specimens.
  • In contrast to mechanical systems, the optical measuring system can be used for very small gage lengths (15 mm and longer with a clamping length of 50 mm).
  • The entire test sequence can be followed on the monitor and subsequent values recorded.
  • 90° deflector with precision reflectors.
  • The videoXtens transverse strain extensometer is available including a backlight screen.

Description of application

The ideal combination for the metals and automotive industries: videoXtens & makroXtens

The combination of the videoXtens transverse strain extensometer and makroXtens provides an ideal contact/optical strain measurement system for the metals and automobile industries.

The system is easy to set up and operate and is ideal for integration of robot systems thanks to a long service life and low wear and tear.

Both extensometers offer the highest level of accuracy in their class and are extremely reliable.

They are primarily used in the production-related testing of metal sheets and strips, which are used to produce body panel sheets and structural sheets.

Technical data

Type

videoXtens transverse strain extensometer

Item no.

1001420

Field of view:

Width, approx.

50

mm

Height, approx.

37.5

mm

Mounted height

44

mm

Specimen width, max.

40

mm

Clamping length, min.

50

mm

Accuracy

Class 1

to EN ISO 9513

Resolution

0.25

µm

Measurement rate, max. (can be set)

166

Hz

Ambient temperature

+10 ... +35

°C

Weight, approx.

1.5

kg

Scope of delivery

  • Measuring head with digital camera, lens f = 50 mm
  • Software for image acquisition and evaluation
  • Accessories case with various calibration specimens and gage mark sets
  • Back light screen with installation kit for load frame
Top