Model : 7675

Applied Standard

• These transverse extensometers use a high-temperature capacitive sensor and do not require any cooling. 
• They will operate up to the maximum temperature limit of most environmental chambers used in materials testing. 
• The Model 7675 is ideal for determination of Poisson’s ratio, and for characterization of anisotropic materials such as composites. 
• All units can accommodate both positive and negative displacements. Model 7675 transverse extensometers are compatible with most Model 7642 high-temperature axial extensometers.
• The 7675 is supplied with the advanced DT6229 controller. The standard output is 0-10VDC analog signal, factory calibrated with the extensometer. 
• This system provides a number of functional enhancements, including high speed digital output, built in calibration and tare functions, analog and digital filters, and more.

Features 

• May be left on through specimen failure. 
• Self-supporting on specimen. 
• Improved accuracy, resolution, and noise rejection at high temperature. 
• Reduced size and weight, and improved high frequency performance. 
• All standard models are suitable for cyclic testing, >25 Hz is typical. 
• Digital controller and power supply included. Provides high level DC voltage output with low noise. Easily interfaced to test controllers, data acquisition boards and chart recorders.
  - Includes high speed analog and digital outputs
  - Intuitive web-based user interface for setup, calibration, and data acquisition
  - Built-in calibration reference and auto-zero features
  - Multiple extensometer calibration files may be loaded for use with one controller
  - Multiple temperature-specific calibrations may be stored
  - Selectable analog and digital filter options from 2 Hz to 3 kHz
• Ships fully calibrated with electronics (traceable to NPL (UK)) with user specified voltage output. <
• Mechanical over-travel protection. 
• Suitable for measuring Poisson’s ratio per ASTM E132 with most materials and specimens. 
• Durable stainless steel knife edges. 
• Includes high quality foam lined case.
• Rugged, dual flexure design for strength and improved performance. The next-generation design enables cyclic testing at much higher frequencies.

Load frame

• Reverse cable exit available
• Connectors to interface to nearly any brand test equipment
• Bulkhead adapters for vacuum chambers
• Dual-channel DT6229 controller
• Specialty knife edges

Specification

• Analog Output: User specified, +/-5 VDC or +/-10VDC typical, ±10.8VDC rail
• Digital Output: 24 bit high speed Ethernet output with built-in web interface
• Linearity: 11 point linearization, ≤0.1% of full scale typical
• Resolution: <55 PPM (0.006%FS) RMS@4 kHz, &lt;6 PPM (0.0006%FS)@100 Hz
• Cyclic Testing: &gt;25 Hz typical
• Analog Filter: Selectable 100 Hz analog and 2 Hz - 3 kHz digital filters
• Temperature Range: Ambient to 700℃(1300°F). Use up to 800℃ is possible – contact Epsilon for details. Springs may require periodic adjustment or replacement after long-term testing above ~600℃
• Temperature Sensitivity (Gain): <100 PPM/℃ (0.01%FS/℃) typical
• Temperature Sensitivity (Offset): 20 PPM/℃ (0.002%FS/℃) typical
• Sensor Cable: 0.7 m (2.5 ft) tri-axial high temperature cable, plus 1.5 m (5 ft) room temperature extension cable
• Specimen Size: Fits round samples up to 25 mm (1.0 inch) diameter and flats to 25 mm (1.0 inch) wide
• Operating Force: 1-2 kgf (30-60 oz) typical, depending on model
• Environment: Recommended for elevated temperature testing in dry air, inert / non-corrosive gases, or vacuum
• Power: Includes power supply for your country (specify)