Horizontal Steel Strand Relaxation Testing Machine 300KN

I. Main Technical Specifications:

1. Maximum Test Force: 300kN

2. Horizontal Main Machine Structure: Horizontal four-column main machine structure (configured with calibration devices without the need to disassemble sensors)

3. Specimen Size: Steel strand diameter 12.7mm, 15.2mm, length ≥ 1.2m

4. Effective Load Measurement Range: 10 to 300kN

5. Load Measurement Accuracy: Better than ±1% of the indicated value

6. Test Force Error: ≤±1.0%

7. Load Sensor Creep: 30 minutes ≤ 0.02%

8. Temperature Sensor Resolution: 0.1℃

9. Temperature Sensor Accuracy: ±0.3℃

10. Displacement Measurement Accuracy: Better than ±0.5% of the indicated value

11. Deformation Measurement Accuracy: ±0.001mm

12. Control System Resolution: Not less than 500,000 counts

13. Noise: ≤35dB

14. Loading Speed: 100 to 5000 N/S, adjustable

15. Effective Stroke: 100mm

16. Power Supply: Voltage 380V±10%, 220V±10%, 50Hz; Power 2.0kW

II. Functional Features:

· Real-time plotting of the relationship between remaining test force and time, as well as the relationship between temperature and time.

· Capable of calculating the stress relaxation performance of the specimen over 1000 hours, with options for double logarithmic and single logarithmic calculations, as well as all data or characteristic time point corresponding data options.

· Arbitrary setting of loading rate.

· Constant load and constant displacement control functions.

· Automatically obtain the stress relaxation performance of the specimen (such as stress relaxation rate, relaxation stress, relaxation rate, etc.) and print a complete test report and test curve.

· Quick and accurate digital calibration of load, with overload protection function.

· Programmable test conditions (sample environment, test conditions).

· Storage of test results, with the ability to review and traverse the test process.

· Automatic adjustment of curve coordinates: when entering the test state, the system automatically adjusts the coordinate values, ensuring a complete curve throughout the test process. Sample conditions can be automatically stored, automatically retrieved, and reset if needed.

· Data acquisition: After the test is completed, data can be picked up on the test curve using a mouse.

III. Main Configuration:

1. One electronic relaxation testing machine host (including one set of four-column reaction frame and high-precision spoke-type sensor)

2. One pair of tensile clamping bodies

3. High-precision displacement measurement device

4. High-precision electronic extensometer: original gauge length 1000mm, maximum deformation 50mm

5. Special fixtures for steel strands: Φ12.7, Φ15.2, one set each

6. One imported brand temperature recording module

7. One set of relaxation control special software and one imported brand servo system

IV. Main Functions:

The equipment adopts closed-loop control of the control mode and program control of the test process, with shock-free switching between various control methods. The computer automatically completes the control, data acquisition, display, and storage of the test process (main parameters: test force, relaxation force, relaxation rate, or logarithmic relaxation rate). After the test is completed, data can be analyzed and processed, and the required test curve and test report can be printed. Various test curves required by the standard can be selected (can plot the relationship curves of remaining test force or logarithmic remaining force, relaxation force or logarithmic relaxation force, relaxation rate or logarithmic relaxation rate, temperature, etc. with time or logarithmic time).

The computer software is developed based on the Windows 98/Windows 2000/Windows XP/Win10 platform, with a beautiful interface and easy operation; the display of test force and deformation uses configuration instrument display, which is very eye-catching; the embedded database facilitates data historical traceability and networking requirements; the report adopts a template operation method, and users can master it with simple training. The entire software is highly encapsulated, easy to operate, and comprehensive in function; it has a standard test program, and by pressing the shortcut key, the test system can load 70% or 80% of the nominal maximum force of the steel strand according to the standard requirements within 3-5 minutes, and automatically start recording test data within 1 minute and automatically stop the test after the set time. The correlation coefficient between the test curve and the theoretical fitting curve is above 99%, so the computer can extrapolate the test results of 1000 hours based on the test data within 100 hours, or conduct a continuous test of 1000 hours, thus shortening the actual experiment time.