Microcomputer Control Tensile Stress Relaxation Testing Machine

Product Description

• Algorithm to predict specimen 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.
• As many as 20 layers of sensor linear compensation, elevates the precision of the instruments to the next level.
• Comparing a framed structure with a column-based structure, the framed structure has better stiffness that is over 2.5 times greater than the column-based structure.
• Closed test space design reduces the temperature shift resulted from the air flow at the air-conditioner vent, improves the temperature uniformity and stability in the test space.
• Pre-installed with reaction frame, provides more convenience for the load transducer to calibrate.
• Real-time drawing of curves of remaining load with time, or temperature with time.

• Capacity :  300kN
• Load measurement range:  6¾300kN
• 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./10
• Deformation measurement range:  ¾10 mm
• Deformation measurement accuracy : ±0.5%
• Grip displacement measurement accuracy : ±0.5%
• Grip speed adjustment range: ¾80mm/min
• Grip speed accuracy : ±0.5%
• Loading speed adjustment Range:  0.01% ¾2.5%F.S./s
• Loading speed controlling accuracy : ±0.5%
• Temperature measurement resolution : 0.1
• 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
• Diameter for PC steel rod:  16mm, length 3.2 m
• Power supply:  1kW/AC220V/50Hz
• Weight:  Approx. 1600 kg