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Computerized Stress Relaxation Tester

Computerized Stress Relaxation Tester .

Stress Relaxation Tester, Computerized Tensile Stress Relaxation Testing Machine

Features of Stress Relaxation Tester, Computerized Tensile Stress Relaxation Testing Machine

Real-time drawing of curves of remaining load with time, or temperature with time.
Algorithm to predict specimen’s stress relaxation performance after 1000 hours (or any specified value in hours), with the option of single or double logarithm. Capable of predicting with standard specimen data or real-time collected data (Suggested). Integrated with an extensive specimen library to improve the precision and reliability of testing results.
Splitting the sampling stage into four sub-stages and applies different sampling cycles in consideration of the logarithm characteristic of time, improving the reliability of data greatly.
Support for 100-hour tests. Test time can be assigned at will. E.g. 24-hour test.
Automatically retrieves test data and inspects the stress relaxation performance of the specimen. (e.g. stress relaxation rate, relaxed stress, relaxation rate, etc.)
Closed loop control of channels such as load, displacement, deformation, etc. Smooth switching in between.

Technical Specifications

Capacity	500kN
Load measurement range	10ï½ž500kN
Load measurement accuracy	±0.5%
Load resolution	±1/500000 of Max capacity, no stepping, no change in full scale
Load transducer creep	≤0.03%F.S.
Temperature effect on load transducer sensitivity	≤0.03%F.S./10â„ƒ
Deformation measurement range	0ï½ž10 mm
Deformation measurement accuracy
Deformation measurement accuracy	±0.5%
Grip displacement measurement accuracy	±0.5%
Grip speed adjustment range	0.01ï½ž60mm/min
Grip speed accuracy	±0.5%
Loading speed adjustment Range	0.01%ï½ž2.5%F.S./s
Loading speed controlling accuracy	±0.5%
Temperature measurement resolution	0.1 â„ƒ
Temperature measurement accuracy	±0.3â„ƒ(-20â„ƒï½ž80â„ƒ),±0.5â„ƒ(-40â„ƒï½ž-20â„ƒ/80â„ƒï½ž110â„ƒ)
Valid tensile travel	100 mm
Test space	Max distance between left/right grip: 2450 mm
Specimen dimensions	Diameter for steel strand: 12.7 mm, 15.4 mm, length ≥ 3.2 m
Specimen dimensions	Diameter for PC steel rod: φ4mmï½žφ16mm, length ≥ 3.2 m
Frame dimensions	(2500×540×1055)mm
Power supply	1.5kW/AC380V/50Hz

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