makroXtens Extensometer

makroXtens II is a versatile, high-accuracy extensometer Ideally suited for tensile tests, compression tests, flexure tests, and cyclic tests on metals, plastics, composites, hard foams, and metals that display low to moderate specimen strain. Also suitable for use in temperature chambers.
makroXtens

Key Advantages and Features

Advantages and features

  • Standard extensometer in the metals, plastics, and automotive industries, with an installed base of over 2,500 systems
  • Robust measuring system, also suitable for use in automated testing systems
  • Can be used up to specimen break, even with high loads and brittle specimen material
  • Optimum system protection provided by integrated safety mechanism and rotatable knife edges
  • 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)
  • makroXtens is already calibrated from a measurement travel of 20 µm in class 0.5
  • Extremely low drag force of the sensor arms (< 0.05 N)
  • Sensor arms can be replaced quickly without any tools.
  • Knife edges can be set for round or flat specimens through simple rotation
  • Sensor arm contact pressure can be freely adjusted
  • Compression and flexure tests can be performed by simply changing the sensor arms
  • makroXtens II can be used for alternating load tests
  • Large measurement range remains consistent through automatic and specimen centered of the measuring system. The maximum measurement travel is always available
  • Operation with temperature chambers possible using suitable sensor arms
  • Measurement accuracy is specifically increased further in the initial measurement range by an intelligent, patent-pending drag fixture (HP version). This is achieved by the measuring system's delayed drag.
  • Operation is further optimized by the makroXtens II HP's drag fixture (self-locking system)
  • The HP version is approved for closed loop strain rate control to ISO 6892-1 (2009) Method A (1) and to ASTM E8 – 09 Method B
  • Deformation of the specimen is recorded in the elastic and plastic deformation range throughout the entire test until specimen break
  • Very high resolution and measurement accuracy over the entire measurement range
  • An EtherCAT interface is integrated into the machine electronics and the extensometer as standard, eliminating the need for an additional measurement module (no CAN or INC module required) and freeing the module slot for other uses.
  • The measured values are transferred from makroXtens II with the full testControl II measured value acquisition rate, providing a sufficient number of measured values even for quick tests with short test times.
  • All makroXtens II extensometers are fully upgradeable (automatic gage-length adjustment, sensor arms for tensile, compression, flexure and temperature testing, transverse strain extensometer, fine-strain extensometer). Retrofits can be performed on-site.
  • Resolutions of the makroXtens II P and HP were further increased. The maktroXtens II HP with 300 mm long sensor arms now has a resolution of 0.006 μm, enabling the extensometer to continue to supply a sufficient number of measured values for tests with minimal strains/extensions (e.g. tests on ceramics, high-strength or brittle materials). This high resolution is also advantageous for strain control to ISO 6892 Method A (1).
  • makroXtens II can be combined with the motorized fine strain extensometer, allowing highly accurate initial range strain measurement to be performed separately on each side of the specimen. This is extremely important, for example, for measuring the Young's Modulus on metals.

Function description

This multi-purpose extensometer is distinguished by its modular construction. Thus, for example, the manual operation extensometer can be converted to an automatic attaching extensometer.

  • Furthermore, various optional units are available for expanding the functionality of makroXtens II:
  • Various basic models with resolutions of up to 0.006 µm
  • Automatic L0 setting
  • Drive unit for the sensor arms
  • Various sensor arms for tensile, compression, and flexure tests and for tests in temperature chambers
  • Various transverse strain extensometers and a drive unit
  • An EtherCAT interface is integrated into the electronics and the extensometer as standard, eliminating the need for an additional measuring module (no CAN or INC module required) freeing the module slot for other uses.
  • All makroXtens II extensometers are fully upgradeable (automatic gage-length adjustment, sensor arms for tensile, compression, flexure and temperature testing, transverse strain extensometer, fine strain extensometer). Retrofits can be performed on-site.
  • makroXtens II can be combined with the motorized fine strain extensometer, allowing highly accurate initial range strain measurement to be performed separately on each side of the specimen. This is extremely important, for example, for measuring the Young's Modulus on metals.

Measuring Extension with makroXtens

1:28

Contacting makroXtens extensometer

Ideal for tensile tests, compression tests, flexure tests and cyclic tests on metals, plastics, composites, and hard foams.

Technical Overview

  • makroXtens fulfills accuracy class 0.5 to EN ISO 9513

makroXtens II for mounting to AllroundLine testing system. Direct connection via the test Control II machine electronics' EtherCAT interface. No additional modules or module bus slots required.

Type

makroXtens II 100, P

makroXtens II 100, HP

makroXtens II 100, CFRP/GFRP

makroXtens II 205, P

makroXtens II 205, HP

makroXtens II 300, P

makroXtens II 300, HP

Item No.

083938

083939

1005677

083940

083941

083942

083943

Accuracy to EN ISO 9513

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Class accuracy 0.5 (1)[1]

Drag force

≤0.05

≤0.05

≤0.05

≤0.05

≤0.05

≤0.05

≤0.05

N

Resolution in conjunction with:

300 mm lever arm length

0.09

0.006

0.006

0.09

0.006

0.09

0.006

µm

450 mm lever arm length

0.14

0.009

0.009

0.14

0.009

0.14

0.009

µm

600 mm lever arm length

0.18

0.012

0.012

0.18

0.012

0.18

0.012

µm

Measurement displacement in conjunction with:

300 mm lever arm length

75

75

75

75

75

75

mm

450 mm lever arm length

112.5

112.5

112.5

112.5

112.5

112.5

mm

600 mm lever arm length

150

150

150

150

150

150

mm

Initial gage length, max.

up to 100[2]

up to 100[2]

up to 100[3]

up to 205[2]

up to 205[2]

up to 300[2]

up to 300[2]

mm

Specimen thickness/diameter, max.

30[4]

mm

Dimensions

Height

375

375

375

480

480

620

620

mm

Width

167

167

167

167

167

167

167

mm

Depth

375

375

375

375

375

375

375

mm

  1. Accuracy grade 0.5 when using sensor arms with a length of 300 mm and 450mm, an L0 adjustment range of 100 mm, 205 mm, and 300. Accuracy grade 1 when using longer sensor arms
  1. Initial gage length 5 mm or greater possible with corresponding sensor (10 mm as standard) The maximum value is thereby reduced by 5 mm.
  1. Initial gage length, min. see sensor arm
  1. Standard is 30 mm; up to 110 mm with corresponding sensor

Optional Transverse Strain Extensometer for Precise and Reproducible Measurements with makroXtens

Mechanical Transverse Strain Extensometer

These are designed for measuring transverse strain during tensile tests on metals and plastics.

The transverse strain extensometer is mounted to the extensometer and can be automatically or manually attached or detached depending on the extensometer's configuration.

Mechanical Transverse Strain Extensometer

Transverse strain extensometers can be used in a temperature range of +10 to +35 °C. All transverse strain extensometers can only be used in conjunction with the AllroundLine and with the sensor arms for tensile tests (325868 oder 325874). Transverse strain extensometers can be used for r and n value determination. If the 90° swivelable transverse strain extensometer is swiveled away, if it can reach a L0 of > 10 mm, or if attached to the specimen, the L0 will increase to > 50 mm!

The manual transverse strain extensometers are connected to a control circuit board directly on the makroXtens II.

Type

Item No.

Measuring lines

Resolution
[µm]

measurement path

Initial gage length
[mm]

Specimen width
[mm]

Specimen thickness, max.
[mm]

Contact forces
[N]

Can be swiveled out 90°, without mechanical Switchover

084635[1]

1

0.1

≥10[2]

10 to 25.4

4

0.5 to 0.7

Can be swiveled out 90°, without mechanical switching

084636[1] [3]

1

0.002

0 to 6

≥10[4]

4

0.5 to 0.7

Can be swiveled out 90°, without mechanical Switchover

082678[1]

2

0.1

0 to 6

≥10[2]

4

0.5 to 0.7

Can be swiveled out 90°, without mechanical Switchover

084634[1]

2

0.002

0 to 6

≥10[2]

4

0.5 to 0.7

Can be swiveled out 90°, without mechanical Switchover

060702[1]

4

0.1

0 to 6

≥10[2]

4

0.5 to 0.7

Can be swiveled out 90°, without mechanical Switchover

061253[1]

4

0.002

0 to 6

≥10[2]

4

0.5 to 0.7

Can be swiveled out by 15°, for varying specimen widths[5]

084637

2

0.1

4 to 9

≥50[2]

4

1.5 to 2

Can be swiveled out by 15°, for varying specimen widths[5]

084638

2

0.002

4 to 9

≥50[2]

4

1.5 to 2

  1. Not in conjunction with fine strain extensometers (item numbers 056895 and 058001)
  1. makroXtens II initial gage length
  1. You can determine Poisson's ratio only with the transverse strain extensometer item no. 084636.
  1. Initial gage length of multiXtens
  1. Through mechanical switching

The following applies to all devices: Accuracy Class 1 to EN ISO 9513

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

Overall 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 to +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 gauge mark sets
  • Back light screen with installation kit for load frame
  • Digital measurement module
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ProLine Makro Extensometer

The ProLine Makro extensometer is a high-resolution extensometer for tensile tests performed on metals, plastics, hard foam materials, and materials with low to average specimen strain.

 

Key Advantages and Features of ProLine Makro Extensometers  

Advantages and features

  • Deformation of the specimen is recorded in the elastic and plastic deformation range throughout the entire test until specimen break
  • 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
  • Very high resolution and measurement accuracy over the entire measurement range
  • Tiltable knife edges prevent damage to the sensor arms and knife edges at specimen break
  • The knife edge geometry can be adjusted easily and without tools by rotating the knife edges, allowing you to test flat as well as round specimens
  • Quick release fastener for sensor arms, enabling them to be replaced without the use of tools
  • Sensor arm clamping force can be adjusted steplessly
  • Centricity is automatically ensured by positioning in the test area
  • Accuracy class 1 to EN ISO 9513

Technical data

Makro-extensometer for two-column ProLine testing machines

Item no.

085813[1]

Drag force

≤0.05

≤0.05

N

Specimen width, max.

60

60

mm

Specimen thickness/diameter

30

30

mm

Ambient temperature

+10 to +35

+10 to +35

°C

Dimensions (H x W x D)

360 x 125 x 340

360 x 125 x 340

mm

Accuracy

Class 1

Class 1

to EN ISO 9513

Sensor arms

Resolution

0.6

0.075

µm

Sensor arm length

300

300

mm

Sensor arm opening

70

70

mm

measurement path

80

80

mm

Initial gage length L0

10 to 100 stepless

10 to 100 stepless

mm

Required for this

Item no.

046637

Incremental measurement module

Incremental measurement module

  1. Sensor arms with a sensor arm length of 300 mm are included in the scope of supply.

When using compression platens, adaption via a spacer (Item no. 313996) is required for the compression platens to drive together completely

Global partner for reliable test results - SAPA opts for Zwick testing technology

Norwegian concern SAPA is the world leader in aluminium solutions and its extruded aluminum profiles are used in many different industries. SAPA has chosen Zwick as its global materials testing partner and will be using testing machines supplied by the Ulm (Germany)-based manufacturer at some 40 locations around the world.
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