DMA 850 Dynamic Mechanical Analyzer
DMA 850 Dynamic Mechanical Analyzer
DMA 850 Dynamic Mechanical Analyzer
DMA 850 Dynamic Mechanical Analyzer
DMA 850 Dynamic Mechanical Analyzer
DMA 850 Dynamic Mechanical Analyzer
- Description:
DMA 850 Dynamic Mechanical Analyzer
- Model:
Discovery DMA 850
- Manufacturer:
USA TA
Product Information
  • Description
  • Standard
  • Feature
  • Specification
  • Configuration
  • Software
Description

dma动态热机械分析仪

TA Instruments invites you to experience the in Dynamic Mechanical Analyzers, the Discovery DMA 850. Building on technologies of the selling DMA, improvements in every aspect of DMA performance deliver the accurate and reproducible measurement of mechanical properties over a wide temperature range. It’s never been easier to get DMA data!


Stiff, Frictionless Air Bearing Support

The non-contact drive motor transmits force directly to a rectangular air bearing slide. The slide is guided by eight porous carbon air bearings. Pressurized gas forms a frictionless surface that permits the slide to “float.” The slide connects directly to the drive shaft and sample clamp for 25 mm of frictionless displacement. The rectangular shape of the drive shaft completely eliminates off-axis motion.


Wide Range, High Resolution Optical Encoder

Based on diffraction patterns of light through gratings, optical encoders provide  resolution over very wide ranges compared to LVDT’s used in competitive devices. Due to the 0.1 nanometer resolution of the optical encoder, very small amplitudes can be measured. Enhanced optical encoder sensitivity, combined with refined motor controls, results in displacements up to 100× smaller than previous drive technology, including control of displacements as small as 5 nm.


Responsive Direct Drive Motor

The DMA 850’s non-contact motor applies both dynamic and static deformation over the full 25 mm range of motion, providing control in all modes and clamp positions.The motor is constructed of high-performance lightweight composites that axial and torsional stiffness while system inertia.Sophisticated control electronics enable the fast motor control over the wide continuous range of force, from 0.1 mN to 18 N. This enables the system to capture a broad spectrum of material properties with the high level of sensitivity and accuracy. These precision controls also provide vast improvements in transient response, including a step-displacement response of 50 ms, as well as a 100× improvement in stress-control accuracy.


Optimized Mechanics

The critical drive components of the DMA 850 are mounted within a high-stiffness aluminum casting that is rigidly mounted to an FEA-optimized instrument frame. Competitive systems based on moveable, hanging, or soft-mounted frames are constrained in their effective frequency-range by the combination of sample stiffness and system resonance. 


Temperature-Controlled Transducer
The transducer is temperature-controlled to eliminate drift associated with temperature changes from the sample or laboratory environment. The result is the stable platform for mechanical characterization of materials even under extreme conditions. The DMA 850 is thecommercial DMA instrument to feature a temperature-controlled force and displacement transducer.


Auto-Ranging

Because the modulus of a material can change by several orders of magnitude in a narrow range of time or temperature, the selection of programming parameters can make or break an experiment. If the deformation chosen is too large there could be excessive sample creep. If it is too small, force sensitivity suffers. The all new intelligent Auto-Ranging feature takes the guess work out of selection of starting conditions and ensures force and displacement are automatically maintained within reasonable user defined limits. Program the experiment and walk-away with the peace of mind that you will get great data the every time.


Direct Strain
Faster electronics, all new digital signal processor (DSP) controls, and an enhanced drive system allow for an all-new type of strain control in the DMA 850. DirectStrain is real-time strain control for faster and more accurate measurements of challenging samples and test conditions, such as rapidly changing materials or soft specimens at high frequencies. DirectStrain guarantees consistent data collection even during transitions on quickly changing samples and a 50× improvement in strain accuracy over conventional DMA technology.
Standard
Feature

• Non-contact, low mass motor delivers continuous forces from 0.1 mN to 18 N to measure everything from soft to stiff materials

• Frictionless, low-compliance air bearing design ensures force sensitivity and accuracy

• Unique optical encoder technology provides 0.1 nm resolution over a 25 mm continuous range of travel for testing versatility

• New DirectStrain™ and Intelligent Autoranging controls allow you to measure the wide range of sample stiffness and frequencies for the data, the first time, every time

• Choice of two dedicated environmental systems for responsive control under the relevant test conditions

• Air Chiller Systems provide effective controlled cooling to -100°C without the cost or hassle of liquid nitrogen

• Purpose-built, high-stiffness, low mass clamps are easy-to-use and ensure data repeatability

• New innovative “app-style” touch screen puts instrument functionality simply One-Touch-Away™, enhancing usability and making it easier than ever to get data

• Powerful TRIOS software provides simple set-up and execution through separate test interfaces designed for novice or expert users.

• Commitment to quality backed by the industry’s  five-year furnace warranty for peace of mind

Specification
DescriptionTechnical Specification
Maximum Force18 N 
Minimum Force0.0001N
Force Resolution0.00001 N
Frequency Range0.001 to 200 Hz
Dynamic Deformation Range±0.005 to 10,000 μm
Strain Resolution0.1nm
Modulus Range103 ~3×1012 Pa
Modulus Precision±1%
Tan δ Sensitivity0.0001
TTan δ Resolution0.00001
Temperature Range

Standard Furnace: -160℃~600℃

RH Accessory: 5°C to 120°C

Time-Temperature Superposition

YES


Configuration
Accessories/Spare Parts

• Standard Furnace

• Gas Cooling Accessory

• Air Chiller Systems (ACS)

• Nitrogen Purge Cooler

• DMA-RH Accessory