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EC-Twist DMTA

EC-Twist DMTA
EC-Twist DMTA
Product Code : 01
Product Description

EC-Twist is a dynamic mechanical analyzer for DMTA analysis on solids as well as liquids. The modular system performs measurements in torsion and extension and is the first DMTA solution that can also be used for shear rheological experiments - at unprecedented precision.

Key Features :

Highlights

  • Performed on highly diverse samples for full flexibility ensured by a wealth of different measuring systems and temperature devices
  • DMTA tests in torsion or extension, as well as shear viscosity determination and extensional rheological tests Fully digital instrument employing the latest DSP (Digital Signal Processing) technology
  • High-precision air bearing, including a patented normal force sensor

Ease of use

  • ToolmasterTM: Patented system for automatic recognition of measuring systems and accessories
  • Quickfit coupling: Easy, one-hand measuring system connection in both drive units
  • T-ReadyTM: Reduced waiting times by detecting and signaling sample temperature equilibration
  • Wide range of measuring systems for all kinds of applications
  • USB connection to computer/software
  • Ethernet connection for remote control of the instrument through the company network
  • RheoCompassTM: User-friendly application software  

High precision

  • Decoupling of sample pretension (stepper motor) and excitation (EC motor) considerably increases the system's precision for solid bar measurements
  • EC-Twist's peak performance is based on technological highlights such as the air-bearing-supported, synchronous EC motor, TruRateTM sample-adaptive motor control, TruStrainTM real-time position control or the patented normal force sensor

Wide range of accessories

  • Devices for temperature control ranging from -150oC to 1000oC
  • Special accessories for DMA and DMTA measurements, rheo-optics, magneto- and electrorheology, interfacial rheology, UV curing and many other applications

Technical Specifications :

Technical Data

Unit

EC-Twist 302

EC-Twist 502

Bearing

-

Air

Air

EC motor

-

Yes

Yes

Permanent torque (60 min), no signal drift

-

Yes

Yes

EC mode (controlled shear rate and shear stress)

-

Yes

Yes

Maximum torque

mNm

200

300

Min. torque, rotation

nNm

1

100

Min. torque, oscillation

nNm

0.5

50

Torque resolution

nNm

0.1

0.2

Angular deflection
(set value)

µrad

0.05 to ∞

0.1 to ∞

Angular deflection, resolution

nrad

10

10

Step rate, time constant

ms

5


Step strain, time constant

ms

10

10

Step time (rate, strain), 99 % of set value (all samples)

ms

30

30

Min. angular velocity(1

rad/s

10-9

10-9

Max. angular velocity

rad/s

314

314

Min. angular frequency(2

rad/s

10-7 (3

10-7 (3

Max. angular frequency

rad/s

628

628

Normal force range

N

0.005 to 50

0.01 to 70

Normal force resolution

mN

0.5

2

Dimensions

mm

678 x 444 x 586

753 x 444 x 586

Weight

kg

42

47

ToolmasterTM, measuring system

-

Yes

Yes

ToolmasterTM, measuring cell

-

Yes

Yes

QuickConnect for measuring system, screwless

-

Yes

Yes

Electronic trimlock for the measuring system

-

Yes

Yes

Digital Eye, software video option and camera

-

optional

optional

Virtually gradient-free (horizontal, vertical) temperature control

-

Yes

Yes

Peltier-based convection oven, does not require LN2 for cooling

oC

-20 to 180

-20 to 180

Convection Temperature Devices (CTD)

oC

-150 to 1000

-150 to 1000

Automatic gap control / setting (AGC/AGS)

-

Yes

Yes

Direct strain, amplitude controller

-

Yes

Yes

Direct stress, amplitude contoller

-

Yes

Yes

TruRateTM

-

Yes

Yes

TruStrainTM

-

Yes

Yes

Normal force and velocity profiles, tack, squeeze

-

Yes

Yes

Raw data (LAOS, waveform)

-

Optional

Yes

1) Depending on measuring point duration and sampling time, practically any value is achieved

2) Set frequencies below 10-4 rad/s are of no practical relevance due to the measuring point duration > 1 day

3) Theoretical value (duration per cycle = 2 years)


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