Rheometer: MCR 702 TwinDrive

Anton Paar introduces a groundbreaking high-end rheometer in a class of its own: MCR 702 TwinDrive. For the first time ever in the history of rheometry, rheological tests can be performed with two torque transducers and drive units at once: Two powerful EC motor units in a combined modular setup – flexible and precise enough to deliver any result users are looking for. In short, this is the first system to cover all possible rheological applications. MCR 702 TwinDrive: One rheometer. Two EC motors. All possibilities.

Key Features MCR 702 TwinDrive

Technical highlights

  • TwinDrive technology: Two powerful, synchronous EC motor drives in one single modular setup
  • IsoLign Piezo flange: Complete stepless gap control down to sizes of 10 nanometers
  • Fully digital instrument employing the latest DSP (Digital Signal Processing) technology
  • Two high-precision air bearings, including two patented normal force sensors
  • TruGap™: Innovative and patented system for measuring the gap
  • TruRate™: Sample-adaptive controller in rotation and step strain
  • TruStrain™: Fast and accurate strain control due to improved real-time position control oscillation (DSO)
  • Intuitive color display

Available test modes employing TwinDrive technology

  • 2EC mode: Both motors operate as drive units and torque transducers and are used in different test modes
    • counter-rotation
    • separate motor transducer
  • EC mode: Single-motor operation as known from the established MCR series, incorporating the entire range of MCR measuring and environmental systems

Ease of use

  • Toolmaster™: Patented system for automatic recognition of measuring systems, accessories and TwinDrive motor
  • Quickfit coupling: Easy, one-hand measuring system connection in both drive units
  • T-Ready™: 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
  • RheoCompass™: User-friendly application software

Wide range of accessories

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

Technical Specifications

MCR 702 TwinDrive
Technical Data Unit Single-drive Mode Twindrive Mode
EC motor (brushless DC) with high resolution optical encoder and air bearing Yes Yes
Permanent torque (60 min), no signal drift Yes Yes
Controlled shear rate and shear stress Yes Yes
IsoLign Piezo flange – Gap size change nm 10 10
Maximum torque mNm 230 230
Minimum torque, rotation mNm 1 5 (SMT)
Minimum torque, oscillation mNm 0.5 1 (SMT)
Angular deflection, set value μrad 0.05 to ∞ 0.05 to ∞
Step rate, time constant ms 5 5
Step strain, time constant ms 10 10
Step rate, time to reach 99 % of set value (independent of sample) ms 30 30
Minimum angular velocity, controlled (1) rad/s 10-9 10-9
Maximum angular velocity, controlled rad/s 314 2 x 314
Minimum angular frequency (2) rad/s 10-7 (3) 10-7 (3)
Maximum angular frequency rad/s 628 628
Normal force range N 0.005 to 50 0.001 to 50
Normal force resolution mN 0.5 0.5
Toolmaster™, measuring system and measuring cell (wireless detection and transmission of measuring system and calibration parameters) Yes Yes
QuickConnect for measuring systems, screwless Yes Yes
Electronic trim lock for the measuring system Yes Yes
TruRate™ Yes Yes
TruStrain™ Yes Yes
Normal force and velocity profiles, tack, squeeze Yes Yes
Automatic gap control/setting, AGC/AGS Yes Yes
Dimensions mm 753 x 444 x 586
Weight kg 47 56
Depending on your application and test mode, MCR 702 TwinDrive can be operated with …
Direct strain, amplitude controller Yes
Direct stress, amplitude controller Yes
Raw data (LAOS, waveform, …) Yes
Digital Eye video option and camera Optional
Maximum temperature range °C -150 to +1000>
Pressure range bar up to 1000
Structure Analysis (Microscope, SALS, SANS, Birefrigence, PIV, …) Optional
Additional Parameter Setting (UV, Magneto- and Electro-Rheological Device, …) Optional
Extended Material Characterization (DMTA, Tribology, …) Optional
Connections USB, Ethernet, 4 analog interfaces, 3 auxiliary inputs, Pt 100 and thermocouple interfaces

1) Depending on measuring point duration and sampling time practically any value is achieved
2) Set frequencies below 1.0E-04 rad/s are of no practical relevance due to the measuring point duration > 1 day
3) Theoretical value (duration per cycle = 2 years)

Standards

A

ASTM D4440
ASTM D4473
ASTM D5279

D

DIN 53019-1
DIN 53019-2
DIN 51810 Part 1
DIN 51810 Part 2
DIN 54458
DIN 1342 1-3
DIN 13343
DIN 3219

E

EN 14770
EN 3219

I

ISO 3219
ISO 6721-1

P

Ph. Eur. 0132
Ph. Eur. 2.2.8 – Viscosity
Ph. Eur. 2.2.10 – Rotating viscometer method

U

USP 912 – Rotational Rheometer Methods

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