High Precision Stress Tensile Relaxtion Testing Machine

High Precision Stress Tensile Relaxtion Testing Machine

Features of High Precision Stress Tensile Relaxtion Testing Machine

 

1. 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.
2. 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.
3. Pre-installed with reaction frame, provides more convenience for the load transducer to calibrate.
4. Real-time drawing of curves of remaining load with time, or temperature with time.
5. 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.
6. 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.
7. Support for 100-hour tests. Test time can be assigned at will. E.g. 24-hour test.

 

Technical Specifications
Capacity	400kN
Load measurement range	8～400kN
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	0～10 mm
Deformation measurement accuracy
	±0.5%
Grip displacement measurement accuracy	±0.5%
Grip speed adjustment range	0.01～60mm/min
Grip speed accuracy	±0.5%
Loading speed adjustment Range	0.01%～2.5%F.S./s
Loading speed controlling accuracy	±0.5%
Temperature measurement resolution	0.1 ℃
Temperature measurement accuracy	±0.3℃(-20℃～80℃),±0.5℃(-40℃～-20℃/80℃～110℃)
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: φ4mm～φ16mm, length ≥ 3.2 m
Frame dimensions	(2500×540×1055)mm
Power supply	1.5kW/AC380V/50Hz
Weight	Approx. 2400 kg