This latest extensometer is developed to satisfy the strict demands of strain controlled testing as mentioned in ISO 6892, while offering a number of new features that will enhance productivity with static testing applications such as compression and tension testing and long term testing like creep and low cycle fatigue.

Features

• They are developed for those applications that need greater than ±0.10 inches (±2.5 mm) full scale measuring range.

• Can be left on through specimen failure

• The extensometer is developed such that it satisfies the demands of strain-controlled testing as is required by ISO 6892, and also more common testing. The model 3549 isolates strain sensing components from outside vibrations.

• Using innovative auto-setting mechanism, the gauge length is automatically set between each test and enables the device to be mounted to the sample in just a few seconds.

• The included contact force setting assembly enables convenient control of the low contact force.

• With the same amount of force, this enables easy repeatable placement of the extensometer on subsequent specimens.

• A novel slide mount enables the extensometer to engage the specimen after achieving the test temperature.

• All models can be used for cyclic testing and also measure in both tension and compression

• By using gauge length spacers, the gauge length of the 3549 can be easily adjusted to almost any gauge length

• Road length configurations may impact the final class rating and most standard units satisfy existing ISO 9513 class 0.5 and ASTM class B-1 requirements for accuracy

• Quick attach connectors are provided with the 3549 for the water cooling lines and the electrical connections, enabling easy installation of the extensometer body

• The model features dual, rugged flexure design for enhanced performance

• The 3549 can be used in carousel systems or with single furnaces

• Full bridge, 350Ù strain gaged design for compatibility with almost any test system.

• In both directions, mechanical overtravel stops are possible

• All units are provided with either high purity alumina ceramic rods (1200°C) or alpha grade silicon carbide rods (1600°C)

• Includes high quality foam lined case and a spare set of ceramic rods

 

Supplied Parts

• One set of extension rods. Rod lengths are made to fit furnace

• Slide mounting (mounting arm) with friction lock-on linear slide for loading contact rods into testing position

• Includes high quality foam lined case