AE900 Automatic Extensometer

Long travel, semi-automatic gauge length extensometers Application: The AE900 extensometer is specifically designed for applications with highly lengthening materials such as plastics and rubber, incorporating long travel (up to 900 mm). The AE900 complements relatively lowcost instruments used for the testing of plastics. Design and function: The AE900 will be operated at semi- and full automatic testing systems, particularly for applications, where the gauge length must not have to be changed very often. The AE900 works semi-automatic, the positioning of the measuring arms with respect to the middle of the sample as well as the setting of the initial gauge length has to be done manually (once before the test starts). Clamping and unclamping of the measuring arms respectively moving to the manually before adjusted position and gauge length will be done automatically (electrically motor-driven). As long as the Le-value and –position remain unchanged no manual operation is required. The AE900 is suitable for nearly all samples (from a gauge length of Le 10 mm) up to sample rupture. Measuring direction upwards or downwards is available. The measuring heads may be removed from the device easily and quickly by means of a screw/insert system. Compatible with Tinius Olsen ST and SL series of materials testing systems

Very high resolution of up to 1 μm over the complete measuring range Very low clamping forces even allow testing of foils and thin wires The round knife edges can be utilized along their entire perimeter by rotating them The gauge length position and value can be exactly set under computer control

Accuracy class EN ISO 9513: 2 upto 1mm stroke 1 from 1mm stroke 0.5 from 8mm stroke Measurement principle: Opto-incremental Measurement system (standard): ERO 1480 (1 Vpp) per measuring head Signal period: 100µm Resolution: ≤ 1μm (depending on interpolation) Measurement system (alternative): ERO 1470 (TTL x 25) per measuring head Signal period: 4µm Resolution: 1µm (fourfold counting) Travel: 910mm minus L0

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