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



Features & Benefits:

Non-tương tác, low mass motor delivers continuous forces from 0.1 mN to 18 N lớn measure everything from soft to lớn stiff materialsFrictionless, low-compliance air bearing design ensures superior force sensitivity and accuracyUnique optical encoder giải pháp công nghệ provides 0.1 nm resolution over a 25 mm continuous range of travel for ultimate testing versatilityNew DirectStrain™ và Intelligent Autoranging controls allow you to measure the widest range of sample stiffness và frequencies for the best data, the first time, every timeChoice of two dedicated environmental systems for precise, responsive control under the most relevant kiểm tra conditionsExclusive sầu Air Chiller Systems provide effective sầu controlled cooling to -100°C without the cost or hassle of liquid nitrogenPurpose-built, high-stiffness, low mass clamps are easy-to-use và ensure data repeatabilityNew innovative sầu “app-style” touch screen puts instrument functionality simply One-Touch-Away™, enhancing usability và making it easier than ever khổng lồ get great dataPowerful TRIOS software provides simple set-up and execution through separate thử nghiệm interfaces designed for novice or expert users.Commitment to lớn chất lượng backed by the industry’s ONLY five-year furnace warranty for peace of mind

Deformation Modes
Maximum Force18 N
Minimum Force0.0001 N
Force Resolution0.00001 N
Frequency Range0.001 lớn 200 Hz
Dynamic Deformation Range±0.005 khổng lồ 10,000 μm
Strain Resolution0.1nm
Modulus Range103 lớn 3×1012 Pa
Modulus Precision± 1%
Tan δ Sensitivity0.0001
Tan δ Resolution0.00001
Temperature RangeStandard Furnace: -160°C to lớn 600°CRH Accessory: 5°C lớn 120°C
Time-Temperature SuperpositionYES

Environment SystemsTemperature RangeHeating/Cooling RatesPurge Gas
Standard Furnace-160°C to 600°C20°C/min Heating10 °C/min CoolingAir, nitrogene, argon, helium
DMA-RH Accessory5°C to 120°C±1 °C/minControlled humidity 5% lớn 95% RH

The non-liên hệ motor, frictionless air bearing support, và wide range optical encoder provide unparalleled flexibility for small và large samples, materials that creep, exp&, or contract during an experiment, và application of static or transient deformations.

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Stiff, Frictionless Air Bearing Support

The non-tương tác 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 lớn “float.” The slide connects directly to lớn the drive sầu shaft và sample clamp for an unsurpassed 25 mm of frictionless displacement. The rectangular shape of the drive shaft completely eliminates off-axis motion.

Only TA Instruments employs sophisticated air bearing technology for DMA measurements. Systems without this design feature suffer from poorly controlled deformation in unsupported designs, or diminished sensitivity where spring guidance is employed.


Wide Range, High Resolution Optical Encoder

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


“APP” Style cảm ứng Screen

The DMA 850 boasts a brand-new One-Touch-Away™ app-style touchscreen that greatly enhances usability by placing key instrument features at your fingertips.

Ergonomic thiết kế for easy viewing và operationPacked with functionality khổng lồ simplify operation và enhance user experience

The app-style touch screen includes:

Start/stop experimentsSet temperatureSet clamp positionToggle motor modesMeasure sampleReal-time signalsTest và instrument status at a glance

The app-style touchscreen, powerful new TRIOS software, and quiông xã robust calibration routines work seamlessly to dramatically improve laboratory workflows and productivity.


Responsive Direct Drive Motor

The DMA 850’s non-liên hệ motor applies both dynamic & static deformation over the full 25 mm range of motion, providing exceptional control in all modes và clamp positions.

The motor is constructed of high-performance lightweight composites that maximize axial & torsional stiffness while minimizing system inertia. Sophisticated control electronics enable the fasdemo motor control over the widest continuous range of force, from 0.1 mN lớn 18 N. This enables the system lớn capture a broad spectrum of material properties with the highest màn chơi of sensitivity và 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.

Unlike competitive sầu motor designs that provide either high force or high resolution, or require separate inferior motors for linear travel, the DMA 850 achieves a continuous range of linear travel và high-resolution force measurement.


Optimized Mechanics

The critical drive sầu components of the DMA 850 are mounted within a high-stiffness aluminum casting that is rigidly mounted to an FEA-optimized instrument frame. Competitive sầu systems based on moveable, hanging, or soft-mounted frames are constrained in their effective frequency-range by the combination of sample stiffness & system resonance. The rigid thiết kế of the DMA 850 overcomes this limitation, providing accurate modulus và tung δ values across the broadest range of measurement frequencies và sample stiffness.


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 most stable platkhung for mechanical characterization of materials even under extreme conditions. The DMA 850 is the only commercial DMA instrument to lớn feature a temperature-controlled force & displacement transducer, providing unparalleled measurement stability and accuracy.


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 sầu 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 & 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 first time, every time.


DirectStrain

Faster electronics, all new digital signal processor (DSP) controls, & 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 và a 50× improvement in strain accuracy over conventional DMA giải pháp công nghệ.

In this example, the use of DirectStrain allowed for modulus at tan δ at six frequencies khổng lồ be measured in a single experiment at a ramp rate (2°C/min) that is typical of single-frequency temperature ramps.

Benefits of Direct -Strain include:

Real-time strain control for fast và accurate measurements50× improvement in strain accuracy35% improvement in measurement speedsNo overshoots or undershoots that are typical of iterative sầu control methodsImproved accuracy for soft specimens at high frequenciesUnikhung data collection even at fast ramp rates


TRIOS Software

TA Instruments’ state-of-the-art software package uses cutting-edge technology for instrument control, data collection, & data analysis for thermal analysis và rheology. The intuitive user interface allows you to lớn simply và effectively program experiments, và move sầu easily between processing experiments & viewing và analyzing data.


The new DMA Express interface is designed specifically for new users & those with simple, well-defined experimental requirements it presents kiểm tra thiết lập details in easy-to-choose, self-contained forms. The user is presented with all necessary testing parameters in a self-contained window, populated with sensible default starting parameters. For routine use & comtháng thử nghiệm types, DMA Express shortens training time, reduces the possibility for mistakes in experimental design, and inspires confidence.

Test ModesAvailable Testing
OscillationFrequency Sweep, Strain Sweep, Stress Sweep, Temperature Sweep, Temperature Ramp, Time Sweep, Temperature Sweep (Multi-frequency)/ TTS, Temperature Ramp (Multi-frequency), Fatigue Test
Stress ControlCreep, Creep-Recovery, Creep TTS, IsoStress
Strain ControlStress Relaxation, Stress Relaxation TTS, IsoStrain
Rate ControlStrain Ramp, Stress Ramp


The DMA Unlimited interface delivers the DMA 850’s powerful new capability to lớn sequence any and all deformation modes and thermal profiles in a single test. Go beyond conventional DMA testing và program experiments that mimic complex real-world conditions through an unlimited combination of 23 available steps. Choose from the core DMA Express demo modes plus advanced sample conditioning, deformation, conditional step termination, and repeat segment capabilities. The only limit is your imagination!

Additional Experiment Controls:

Equilibrate or Jump lớn a set temperature, set Soak time at target temperatureSet or Increment Relative Humidity levels, set Soak time at target RHSet or Increment a Force/StressSet or Increment a Displacement/StrainLoop and repeat previous stepsData storage On/Off, set data sampling intervalsControl Motor State, set external events, refill GCA

Unlimited Test Sequencing

The DMA 850’s advanced system architecture opens up unprecedented mechanical testing possibilities that are not bounded by limitations inherent to lớn conventional DMA instruments. For the first time, kiến thiết demo procedures that contain any combination of available chạy thử types including oscillation, transient, strain- và stress- control, mechanical và thermal conditioning, and more. With this new capability, the DMA 850 can perkhung a complete material characterization protocol under a diverse kiểm tra conditions in a single experiment, or apply mechanical conditioning immediately followed by characterization. This new capability unlocks complete material characterization under virtually any mix of demo conditions.


Data Analysis

A comprehensive sầu mix of relevant tools are available for real-time data analysis, even during experiments. Gain actionable insights into your material behavior through a powerful và versatile mix of features seamlessly integrated into TRIOS.

All Standard DMA Analyses:

Onmix và endphối analysisSignal maximum và minimumSignal changeModulus crossoverCurve sầu values at specific X or Y points1st and 2nd derivativesArea under the curvePeak heightPeak integration, & running integralMathematical fitting: straight line, polynomial, or exponential

Advanced Analysis Capabilities:

Time-Temperature Superposition (TTS) analysis with automatic curve shifting và simple Mastercurve generationActivation Energy calculationWLF coefficient calculationCole-Cole & Van Gurp-Palmen plotsBuilt-in models for: relaxation spectra, interconversion of moduli, and creep ringing analysisAdvanced custom analysis with user-defined variables và models


Quiông chồng và Easy Calibration

TRIOS software makes calibrating the clamps và the DMA 850 effortless, even for users with no previous DMA experience! Photorealistic images và clear instructions reduce operator training time by guiding them through simple procedures. A summary report provides calibration status at a glance và ensures data integrity.


Complete Data Record

The advanced data collection system automatically saves all relevant signals, active calibrations, & system settings. Waveforms for each data point may be displayed as Lissajous plots và provide a visual representation of the stress-strain relationship. This comprehensive sầu phối of information is invaluable for method development, procedure deployment và data validation.


The DMA 850 features clamps in a complete phối of deformation types, so a broad range of samples can be accurately analyzed & closely resemble real world process or application conditions. Each clamp is individually optimized for accuracy and ease-of-use.


Features và Benefits

High stiffness, low mass designs provide maximum modulus accuracyLow thermal mass reduces temperature equilibration time và optimizes transition temperature accuracy & precisionIndividual clamp stiffness calibrations ensure modulus accuracy và repeatability, especially between operatorsSimple dovetail connection is easy khổng lồ install & self-aligns, increasing precision & reducing installation timeLimited number of individual components reduces complexity, misalignment, and measurement errorInnovative designs for difficult measurements lượt thích powder and materials immersed in a fluidNEW, improved designs for tension, compression, và shear clamps significantly improve ease-of-use by further simplifying alignment and making sample loading more reproducible

Only TA offers clamps that are ready to lớn use out of the box without complex assembly procedures inherent to competitive sầu designs.


Dual/Single Cantilever

Cantilever (clamped) bending is a good general-purpose mode for evaluating thermoplastics và highly damped materials (e.g., elastomers). Available in sample lengths of 8 mm, đôi mươi mm, and 35 milimet, the cantilever clamps can be used in single or dual configurations. Dual cantilever is especially igiảm giá for measuring the cure of supported thermosets.


Tension

Tensile clamps are designed for uniaxial deformation of films and fibers. In oscillation experiments, the instrument uses constant & variable methods to apply a static load that prevents buckling và unnecessary creep. A newly designed film tension clamp simplifies the clamping mechanism lớn improve ease-of-use, clamping uniformity, và effectively prevents sample slippage. Visual guides aid in aligning film samples & integrated supports simplify fiber testing. The continuous travel of the DMA 850 makes sample loading in tension especially convenient.


3-Point Bend

3-point bending, or không lấy phí bending, is often considered a “pure” mode of deformation because clamping effects are eliminated. Sample spans of 5 milimet, 10 mm, 15 milimet, 20 mm, và 50 milimet are available lớn accommodate a wide range of sample stiffness và specimen sizes. A unique low-friction, roller bearing supported kiến thiết available on the 20 mm & 50 mm clamps improves modulus accuracy và reproducibility by accommodating & accounting for twist or curvature in the test specimen.


Shear Sandwich

Two equal-form size pieces of the same material are sheared between a fixed and moving plate for the measurement of shear modulus, G. This mode is igiảm giá for soft materials such as gels, pressure sensitive adhesives, and high viscosity resins.


Compression

Parallel plate compression measurements are most suitable for low khổng lồ moderate modulus materials such as foams và elastomers. It can also be used to measure expansion or contraction, tack testing for adhesives, compression mix of rubber o-rings, & much more. A new self-aligning mechanism ensures the parallelism of upper & lower plates, enhancing strain & force uniformity while simplifying user interaction and improving modulus accuracy và precision.

The standard compression kit includes parallel plates of 15 mm và 40 milimet diameter, ideally designed for bulk measurements of moderate to low stiffness samples. The penetration kit is designed for higher stiffness materials và local measurements through the use of smaller probes: hemispherical, 1 milimet penetration, or 6 mm plate.


Powder Clamp

The transition temperatures of loose powders can be difficult lớn measure by mechanical techniques. The powder accessory for the DMA850 is used with the dual cantilever clamp to observe sầu transition temperatures of loose powdered materials by DMA, combining the enhanced sensitivity of mechanical analysis with the simple sample preparation of powder characterization techniques.


Submersion

Submersion clamps for the DMA 850 are designed specifically to lớn provide the igiảm giá khuyến mãi test conditions for measuring mechanical properties in a fluid environment up to lớn 150°C.

Accurate sample temperature is obtained by a thermocouple placed within the fluid reservoir & cthua kém to the sampleInert stainless steel construction and a seal-không tính tiền design ensure compatibility with a wide range of fluidsTemperature control provided by the Standard Furnace without additional circulators or environmental systems


Sample Sizes

Deformation Modes
Dual/Single Cantilever8/4* milimet (L), Up to lớn 15 mm (W) và 5 milimet (T)
20/10* mm (L), Up lớn 15 mm (W) and 5 mm (T)
35/17.5* mm (L), Up to 15 mm (W) & 5 milimet (T)
3-Point Bend5,10, or 15 milimet (L), Up to 15 milimet (W) & 7 mm (T)
đôi mươi mm (L), Up to lớn 15 milimet (W) & 7 mm (T)
50 milimet (L), Up to lớn 15 milimet (W) & 7 mm (T)
Tension
Film/Fiber5 lớn 30 milimet (L), Up to lớn 8 mm (W) & 2 milimet (T)
Fiber5 to lớn 30 mm (L), 5 denier (0.57 tex) lớn 0.8 mm diameter
Shear10 milimet square, Up to 4 milimet (T)
Compression15 và 40 milimet diameter, Up to 10 milimet (T)
Submersion
TensionFixed at 15 milimet (L), Up khổng lồ 8 mm (W) và 2 milimet (T)
Compression25 mm diameter, Up to 10 mm (T)
3-Point Bend5, 10, or 15 milimet (L), Up khổng lồ 15 mm (W) and 7 milimet (T)


The DMA 850 offers your choice of two dedicated environmental systems: the Standard Furnace & the DMA-RH Accessory for humidity & temperature control. Installation is simple, making it convenient to lớn switch between systems as required. All environmental systems và accessories are designed specifically for high performance DMA measurements and seamless integration & are manufactured by TA Instruments.


Standard Furnace

The Standard Furnace for the DMA850 is a wide-range bifilar wound furnace that provides unisize temperature control from -160°C to 600 °C. This field-proven design provides for efficient and precise temperature control over the entire temperature range in heating, cooling, and isothermal operation. For subambient temperature control, the furnace is used in combination with one of four available cooling accessories lớn meet your testing requirements. A high-sensitivity thermocouple is in cchiến bại proximity lớn the sample to lớn provide a representative measurement of sample temperature, regardless of the mode of deformation being employed.

Temperature range-160 to lớn 600 ˚C
Heating Rate0.1 khổng lồ trăng tròn ˚C/min
Cooling Rate0.1 to 10 ˚C/min
Isothermal Stability± -.1 ˚C


Gas Cooling Accessory

The Gas Cooling Accessory (GCA) extends the operating range of the DMA 850 to -150°C. The GCA uses cold nitrogen gas generated from controlled evaporation of liquid nitrogene. Automated filling of the GCA tank can be programmed khổng lồ occur after the scan is complete.

The GCA will provide ballistic or controlled cooling rates over the entire operating range of the DMA 850 (-150 lớn 600°C). In general, the maximum cooling rate is a function of the installed clamp and the thermal characteristics of the sample. The figure below shows the typical range* of controlled cooling rates available as a function of temperature.

*Actual performance may vary slightly depending on laboratory conditions and the clamping system installed.


Air Chiller Systems (ACS)

The new Air Chiller System models offer unique gas flow cooling systems that provide the capability for sub-ambient testing without the use of liquid nitroren. Available in two models, the ACS-2 & ACS-3, the chillers feature a multi-stage cascading compressor thiết kế that employs compressed air (7 bar, 200 l/min) as the cooling medium. The ACS-2 và ACS-3 models permit operation of the DMA 850 with Standard Furnace at temperatures as low as -50 °C and -100 °C respectively *. The chiller systems can help eliminate or reduce liquid nitroren usage và associated hazards from any laboratory and offer an incredible return on investment.


Nitroren Purge Cooler

The Nitroren Purge Cooler (NPC) is an innovative alternative sầu for low temperature testing with the DMA 850. The NPC provides crash-cooling & controlled heating at temperatures as low as -160°C with all testing geometries. It is also an igiảm giá choice for minimizing the cool-down time between consecutive sầu experiments. A 2.5 L liquid-nitrogene filled dewar with heat exchanger cools nitrogen gas (2 bar lớn 8 bar, 30 L/min) before being fed to lớn the DMA 850 Standard Furnace. The NPC is a small, economical, và effective option for laboratories that have basic cooling requirements.


DMA-RH Accessory

This precision environmental system provides accurate control of sample temperature & relative sầu humidity for DMA experiments. A custom-designed humidity và temperature chamber optimized for mechanical measurements provides stable, reliable control of temperature & humidity over a wide range of operating conditions. The system successfully prevents condensation, a comtháng occurrence in controlled-humidity environments which makes accurate control of relative sầu humidity impossible. Stable, responsive peltier elements precisely control sample temperature while calibrated digital mass flow controllers deliver pre-heated gas of the prescribed ratio to lớn achieve sầu the target humidity.

The DMA-RH Accessory is a fully integrated unit and includes the following hardware components:

The sample chamber mounts directly khổng lồ the DMA. Peltier elements in the chamber precisely control the temperature lớn ±0.1°C. The sample chamber accommodates standard DMA clamps (tension, cantilever, và 3-point bending).A heated vapor-transfer line is maintained at a temperature above the dew point temperature of the humidified gas in order to avoid condensation and provide accurate results.The DMA-RH Accessory contains the humidifier and electronics which continuously monitor and control temperature & humidity of the sample chamber.

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Temperature range5 khổng lồ 120 ˚C
Temperature Accuracy± 0.5 ˚C
Heating/Cooling RateMaximum ±1˚C/min
Humidity RangeSee humidity range chart below
Humidity Accuracy5-90% RH: ±3% RH
>90% RH: ±5% RH
Humidity Ramp Rate(both increasing và decreasing)2% RH/min (fixed)

Humidity Range


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



Features and Benefits:

Non-contact, low mass motor delivers continuous forces from 0.1 mN to 18 N lớn measure everything from soft to lớn stiff materialsFrictionless, low-compliance air bearing kiến thiết ensures superior force sensitivity & accuracyUnique optical encoder giải pháp công nghệ provides 0.1 nm resolution over a 25 mm continuous range of travel for ultimate testing versatilityNew DirectStrain™ & Intelligent Autoranging controls allow you lớn measure the widest range of sample stiffness và frequencies for the best data, the first time, every timeChoice of two dedicated environmental systems for precise, responsive sầu control under the most relevant kiểm tra conditionsExclusive Air Chiller Systems provide effective controlled cooling to -100°C without the cost or hassle of liquid nitrogenPurpose-built, high-stiffness, low mass clamps are easy-to-use and ensure data repeatabilityNew innovative “app-style” touch screen puts instrument functionality simply One-Touch-Away™, enhancing usability and making it easier than ever khổng lồ get great dataPowerful TRIOS software provides simple set-up & execution through separate test interfaces designed for novice or expert users.Commitment to lớn chất lượng backed by the industry’s ONLY five-year furnace warranty for peace of mind

Deformation Modes
Maximum Force18 N
Minimum Force0.0001 N
Force Resolution0.00001 N
Frequency Range0.001 lớn 200 Hz
Dynamic Deformation Range±0.005 khổng lồ 10,000 μm
Strain Resolution0.1nm
Modulus Range103 lớn 3×1012 Pa
Modulus Precision± 1%
Tan δ Sensitivity0.0001
Tan δ Resolution0.00001
Temperature RangeStandard Furnace: -160°C to lớn 600°CRH Accessory: 5°C to lớn 120°C
Time-Temperature SuperpositionYES

Environment SystemsTemperature RangeHeating/Cooling RatesPurge Gas
Standard Furnace-160°C lớn 600°C20°C/min Heating10 °C/min CoolingAir, nitroren, argon, helium
DMA-RH Accessory5°C to lớn 120°C±1 °C/minControlled humidity 5% lớn 95% RH

The non-tương tác motor, frictionless air bearing tư vấn, and wide range optical encoder provide unparalleled flexibility for small & large samples, materials that creep, expand, or contract during an experiment, và application of static or transient deformations.


Stiff, Frictionless Air Bearing Support

The non-liên hệ 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 sầu shaft & sample clamp for an unsurpassed 25 milimet of frictionless displacement. The rectangular shape of the drive sầu shaft completely eliminates off-axis motion.

Only TA Instruments employs sophisticated air bearing giải pháp công nghệ for DMA measurements. Systems without this thiết kế feature suffer from poorly controlled deformation in unsupported designs, or diminished sensitivity where spring guidance is employed.


Wide Range, High Resolution Optical Encoder

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


“APP” Style cảm biến Screen

The DMA 850 boasts a brand-new One-Touch-Away™ app-style touchscreen that greatly enhances usability by placing key instrument features at your fingertips.

Ergonomic kiến thiết for easy viewing and operationPacked with functionality to lớn simplify operation & enhance user experience

The app-style touch screen includes:

Start/stop experimentsSet temperatureSet clamp positionToggle motor modesMeasure sampleReal-time signalsTest and instrument status at a glance

The app-style touchscreen, powerful new TRIOS software, & quick robust calibration routines work seamlessly to dramatically improve laboratory workflows and productivity.


Responsive Direct Drive sầu Motor

The DMA 850’s non-liên hệ motor applies both dynamic & static deformation over the full 25 milimet range of motion, providing exceptional control in all modes & clamp positions.

The motor is constructed of high-performance lightweight composites that maximize axial và torsional stiffness while minimizing system inertia. Sophisticated control electronics enable the fasthử nghiệm motor control over the widest continuous range of force, from 0.1 mN khổng lồ 18 N. This enables the system khổng lồ capture a broad spectrum of material properties with the highest 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.

Unlượt thích competitive motor designs that provide either high force or high resolution, or require separate inferior motors for linear travel, the DMA 850 achieves a continuous range of linear travel & high-resolution force measurement.


Optimized Mechanics

The critical drive sầu components of the DMA 850 are mounted within a high-stiffness aluminum casting that is rigidly mounted to lớn an FEA-optimized instrument frame. Competitive sầu 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. The rigid design of the DMA 850 overcomes this limitation, providing accurate modulus and tan δ values across the broadest range of measurement frequencies và sample stiffness.


Temperature-Controlled Transducer

The transducer is temperature-controlled lớn eliminate drift associated with temperature changes from the sample or laboratory environment. The result is the most stable platkhung for mechanical characterization of materials even under extreme conditions. The DMA 850 is the only commercial DMA instrument lớn feature a temperature-controlled force & displacement transducer, providing unparalleled measurement stability và accuracy.


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 và ensures force and displacement are automatically maintained within reasonable user defined limits. Program the experiment & walk-away with the peace of mind that you will get great data the first time, every time.


DirectStrain

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

In this example, the use of DirectStrain allowed for modulus at chảy δ at six frequencies to be measured in a single experiment at a ramp rate (2°C/min) that is typical of single-frequency temperature ramps.

Benefits of Direct -Strain include:

Real-time strain control for fast và accurate measurements50× improvement in strain accuracy35% improvement in measurement speedsNo overshoots or undershoots that are typical of iterative control methodsImproved accuracy for soft specimens at high frequenciesUnisize data collection even at fast ramp rates


TRIOS Software

TA Instruments’ state-of-the-art software package uses cutting-edge giải pháp công nghệ for instrument control, data collection, và data analysis for thermal analysis và rheology. The intuitive sầu user interface allows you khổng lồ simply and effectively program experiments, và move sầu easily between processing experiments & viewing and analyzing data.


The new DMA Express interface is designed specifically for new users và those with simple, well-defined experimental requirements it presents chạy thử thiết đặt details in easy-to-choose, self-contained forms. The user is presented with all necessary testing parameters in a self-contained window, populated with sensible mặc định starting parameters. For routine use và comtháng kiểm tra types, DMA Express shortens training time, reduces the possibility for mistakes in experimental kiến thiết, và inspires confidence.

Test ModesAvailable Testing
OscillationFrequency Sweep, Strain Sweep, Stress Sweep, Temperature Sweep, Temperature Ramp, Time Sweep, Temperature Sweep (Multi-frequency)/ TTS, Temperature Ramp (Multi-frequency), Fatigue Test
Stress ControlCreep, Creep-Recovery, Creep TTS, IsoStress
Strain ControlStress Relaxation, Stress Relaxation TTS, IsoStrain
Rate ControlStrain Ramp, Stress Ramp


The DMA Unlimited interface delivers the DMA 850’s powerful new capability to sequence any and all deformation modes and thermal profiles in a single test. Go beyond conventional DMA testing and program experiments that mimic complex real-world conditions through an unlimited combination of 23 available steps. Choose from the core DMA Express thử nghiệm modes plus advanced sample conditioning, deformation, conditional step termination, and repeat segment capabilities. The only limit is your imagination!

Additional Experiment Controls:

Equilibrate or Jump to a phối temperature, mix Soak time at target temperatureSet or Increment Relative sầu Humidity levels, mix Soak time at target RHSet or Increment a Force/StressSet or Increment a Displacement/StrainLoop & repeat previous stepsData storage On/Off, phối data sampling intervalsControl Motor State, phối external events, refill GCA

Unlimited Test Sequencing

The DMA 850’s advanced system architecture opens up unprecedented mechanical testing possibilities that are not bounded by limitations inherent to conventional DMA instruments. For the first time, thiết kế test procedures that contain any combination of available thử nghiệm types including oscillation, transient, strain- & stress- control, mechanical and thermal conditioning, and more. With this new capability, the DMA 850 can perform a complete material characterization protocol under a diverse chạy thử conditions in a single experiment, or apply mechanical conditioning immediately followed by characterization. This new capability unlocks complete material characterization under virtually any mix of chạy thử conditions.


Data Analysis

A comprehensive sầu set of relevant tools are available for real-time data analysis, even during experiments. Gain actionable insights into lớn your material behavior through a powerful & versatile phối of features seamlessly integrated into TRIOS.

All Standard DMA Analyses:

Onphối và endphối analysisSignal maximum & minimumSignal changeModulus crossoverCurve values at specific X or Y points1st and 2nd derivativesArea under the curvePeak heightPeak integration, và running integralMathematical fitting: straight line, polynomial, or exponential

Advanced Analysis Capabilities:

Time-Temperature Superposition (TTS) analysis with automatic curve sầu shifting and simple Mastercurve generationActivation Energy calculationWLF coefficient calculationCole-Cole & Van Gurp-Palmen plotsBuilt-in models for: relaxation spectra, interconversion of moduli, & creep ringing analysisAdvanced custom analysis with user-defined variables và models


Quiông chồng và Easy Calibration

TRIOS software makes calibrating the clamps & the DMA 850 effortless, even for users with no previous DMA experience! Photorealistic images and clear instructions reduce operator training time by guiding them through simple procedures. A summary report provides calibration status at a glance & ensures data integrity.


Complete Data Record

The advanced data collection system automatically saves all relevant signals, active sầu calibrations, and system settings. Waveforms for each data point may be displayed as Lissajous plots và provide a visual representation of the stress-strain relationship. This comprehensive sầu set of information is invaluable for method development, procedure deployment and data validation.


The DMA 850 features clamps in a complete phối of deformation types, so a broad range of samples can be accurately analyzed & closely resemble real world process or application conditions. Each clamp is individually optimized for accuracy & ease-of-use.


Features & Benefits

High stiffness, low mass designs provide maximum modulus accuracyLow thermal mass reduces temperature equilibration time & optimizes transition temperature accuracy & precisionIndividual clamp stiffness calibrations ensure modulus accuracy & repeatability, especially between operatorsSimple dovetail connection is easy lớn install & self-aligns, increasing precision và reducing installation timeLimited number of individual components reduces complexity, misalignment, & measurement errorInnovative sầu designs for difficult measurements lượt thích powder & materials immersed in a fluidNEW, improved designs for tension, compression, và shear clamps significantly improve ease-of-use by further simplifying alignment & making sample loading more reproducible

Only TA offers clamps that are ready lớn use out of the box without complex assembly procedures inherent lớn competitive designs.


Dual/Single Cantilever

Cantilever (clamped) bending is a good general-purpose mode for evaluating thermoplastics & highly damped materials (e.g., elastomers). Available in sample lengths of 8 milimet, đôi mươi milimet, and 35 milimet, the cantilever clamps can be used in single or dual configurations. Dual cantilever is especially igiảm giá khuyến mãi for measuring the cure of supported thermosets.


Tension

Tensile clamps are designed for uniaxial deformation of films & fibers. In oscillation experiments, the instrument uses constant & variable methods khổng lồ apply a static load that prevents buckling and unnecessary creep. A newly designed film tension clamp simplifies the clamping mechanism to lớn improve ease-of-use, clamping uniformity, & effectively prevents sample slippage. Visual guides aid in aligning film samples & integrated supports simplify fiber testing. The continuous travel of the DMA 850 makes sample loading in tension especially convenient.


3-Point Bend

3-point bending, or không tính phí bending, is often considered a “pure” mode of deformation because clamping effects are eliminated. Sample spans of 5 milimet, 10 milimet, 15 mm, 20 mm, and 50 mm are available to accommodate a wide range of sample stiffness và specimen sizes. A chất lượng low-friction, roller bearing supported design available on the 20 mm & 50 mm clamps improves modulus accuracy and reproducibility by accommodating and accounting for twist or curvature in the thử nghiệm specimen.


Shear Sandwich

Two equal-kích cỡ pieces of the same material are sheared between a fixed và moving plate for the measurement of shear modulus, G. This mode is igiảm giá khuyến mãi for soft materials such as gels, pressure sensitive adhesives, and high viscosity resins.


Compression

Parallel plate compression measurements are most suitable for low to lớn moderate modulus materials such as foams and elastomers. It can also be used to lớn measure expansion or contraction, tack testing for adhesives, compression set of rubber o-rings, and much more. A new self-aligning mechanism ensures the parallelism of upper và lower plates, enhancing strain & force uniformity while simplifying user interaction & improving modulus accuracy and precision.

The standard compression kit includes parallel plates of 15 milimet & 40 mm diameter, ideally designed for bulk measurements of moderate khổng lồ low stiffness samples. The penetration kit is designed for higher stiffness materials & local measurements through the use of smaller probes: hemispherical, 1 mm penetration, or 6 milimet plate.


Powder Clamp

The transition temperatures of loose powders can be difficult to lớn measure by mechanical techniques. The powder accessory for the DMA850 is used with the dual cantilever clamp to lớn observe transition temperatures of loose powdered materials by DMA, combining the enhanced sensitivity of mechanical analysis with the simple sample preparation of powder characterization techniques.


Submersion

Submersion clamps for the DMA 850 are designed specifically lớn provide the ikhuyến mãi demo conditions for measuring mechanical properties in a fluid environment up khổng lồ 150°C.

Accurate sample temperature is obtained by a thermocouple placed within the fluid reservoir and cthua kém to lớn the sampleInert stainless steel construction and a seal-không tính tiền thiết kế ensure compatibility with a wide range of fluidsTemperature control provided by the Standard Furnace without additional circulators or environmental systems


Sample Sizes

Deformation Modes
Dual/Single Cantilever8/4* mm (L), Up to 15 mm (W) và 5 mm (T)
20/10* mm (L), Up khổng lồ 15 milimet (W) và 5 mm (T)
35/17.5* mm (L), Up lớn 15 mm (W) và 5 milimet (T)
3-Point Bend5,10, or 15 mm (L), Up to 15 milimet (W) và 7 mm (T)
trăng tròn mm (L), Up to 15 mm (W) & 7 mm (T)
50 mm (L), Up lớn 15 milimet (W) và 7 milimet (T)
Tension
Film/Fiber5 to lớn 30 milimet (L), Up lớn 8 milimet (W) and 2 milimet (T)
Fiber5 to lớn 30 mm (L), 5 denier (0.57 tex) to lớn 0.8 milimet diameter
Shear10 milimet square, Up to lớn 4 milimet (T)
Compression15 và 40 milimet diameter, Up to lớn 10 milimet (T)
Submersion
TensionFixed at 15 milimet (L), Up khổng lồ 8 mm (W) & 2 milimet (T)
Compression25 mm diameter, Up to lớn 10 milimet (T)
3-Point Bend5, 10, or 15 mm (L), Up khổng lồ 15 milimet (W) và 7 mm (T)


The DMA 850 offers your choice of two dedicated environmental systems: the Standard Furnace & the DMA-RH Accessory for humidity & temperature control. Installation is simple, making it convenient khổng lồ switch between systems as required. All environmental systems và accessories are designed specifically for high performance DMA measurements & seamless integration & are manufactured by TA Instruments.


Standard Furnace

The Standard Furnace for the DMA850 is a wide-range bifilar wound furnace that provides unisize temperature control from -160°C to 600 °C. This field-proven thiết kế provides for efficient & precise temperature control over the entire temperature range in heating, cooling, và isothermal operation. For subambient temperature control, the furnace is used in combination with one of four available cooling accessories khổng lồ meet your testing requirements. A high-sensitivity thermocouple is in cthất bại proximity lớn the sample to lớn provide a representative measurement of sample temperature, regardless of the mode of deformation being employed.

Temperature range-160 to 600 ˚C
Heating Rate0.1 lớn trăng tròn ˚C/min
Cooling Rate0.1 to 10 ˚C/min
Isothermal Stability± -.1 ˚C


Gas Cooling Accessory

The Gas Cooling Accessory (GCA) extends the operating range of the DMA 850 to -150°C. The GCA uses cold nitrogene gas generated from controlled evaporation of liquid nitrogene. Automated filling of the GCA tank can be programmed to occur after the scan is complete.

The GCA will provide ballistic or controlled cooling rates over the entire operating range of the DMA 850 (-150 to 600°C). In general, the maximum cooling rate is a function of the installed clamp và the thermal characteristics of the sample. The figure below shows the typical range* of controlled cooling rates available as a function of temperature.

*Actual performance may vary slightly depending on laboratory conditions & the clamping system installed.


Air Chiller Systems (ACS)

The new Air Chiller System models offer unique gas flow cooling systems that provide the capability for sub-ambient testing without the use of liquid nitroren. Available in two models, the ACS-2 & ACS-3, the chillers feature a multi-stage cascading compressor kiến thiết that employs compressed air (7 bar, 200 l/min) as the cooling medium. The ACS-2 and ACS-3 models permit operation of the DMA 850 with Standard Furnace at temperatures as low as -50 °C và -100 °C respectively *. The chiller systems can help eliminate or reduce liquid nitroren usage and associated hazards from any laboratory and offer an incredible return on investment.


Nitrogene Purge Cooler

The Nitrogene Purge Cooler (NPC) is an innovative alternative sầu for low temperature testing with the DMA 850. The NPC provides crash-cooling & controlled heating at temperatures as low as -160°C with all testing geometries. It is also an igiảm giá khuyến mãi choice for minimizing the cool-down time between consecutive experiments. A 2.5 L liquid-nitroren filled dewar with heat exchanger cools nitrogen gas (2 bar to lớn 8 bar, 30 L/min) before being fed lớn the DMA 850 Standard Furnace. The NPC is a small, economical, & effective sầu option for laboratories that have sầu basic cooling requirements.


DMA-RH Accessory

This precision environmental system provides accurate control of sample temperature & relative humidity for DMA experiments. A custom-designed humidity & temperature chamber optimized for mechanical measurements provides stable, reliable control of temperature và humidity over a wide range of operating conditions. The system successfully prevents condensation, a comtháng occurrence in controlled-humidity environments which makes accurate control of relative humidity impossible. Stable, responsive sầu peltier elements precisely control sample temperature while calibrated digital mass flow controllers deliver pre-heated gas of the prescribed ratio to lớn achieve the target humidity.

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The DMA-RH Accessory is a fully integrated unit & includes the following hardware components:

The sample chamber mounts directly to the DMA. Peltier elements in the chamber precisely control the temperature lớn ±0.1°C. The sample chamber accommodates standard DMA clamps (tension, cantilever, và 3-point bending).A heated vapor-transfer line is maintained at a temperature above the dew point temperature of the humidified gas in order to avoid condensation and provide accurate results.The DMA-RH Accessory contains the humidifier and electronics which continuously monitor & control temperature và humidity of the sample chamber.

Temperature range5 to 1trăng tròn ˚C
Temperature Accuracy± 0.5 ˚C
Heating/Cooling RateMaximum ±1˚C/min
Humidity RangeSee humidity range chart below
Humidity Accuracy5-90% RH: ±3% RH
>90% RH: ±5% RH
Humidity Ramp Rate(both increasing và decreasing)2% RH/min (fixed)