Ⅰ、Main Functions：

The machine is designed specifically for relaxation testing of materials such as steel strands, galvanized steel wires, and notched steel wires. The main unit adopts a horizontal structure with adjustable working space through a lead screw. The transmission system is housed within the machine base, ensuring high rigidity for accurate test results. The PC enables closed-loop control for constant force and constant displacement modes, as well as program-controlled test procedures. Different control modes can be seamlessly switched without impact.

The computer can predict 1,000-hour test results based on data obtained within 100 or 200 hours or perform continuous 1,000-hour tests. Real-time test force and curves are displayed, and results, curves, and reports can be stored and printed. The machine complies with GB/T10120-2013 and GB/T5224-2014 standards.

Ⅱ、Key Features：

1.Specialized Sensor: Designed for relaxation tests, it ensures minimal zero drift under long-term force and exhibits strong resistance to relaxation and creep.

2. Closed-Loop Control: Supports constant force and constant displacement control modes.

3.High Transmission Precision: Utilizes a servo motor with a dedicated reducer, ensuring high precision and efficiency.

4.Data Retention During Power Outages: Test data is preserved in the event of a power outage, allowing tests to resume upon power restoration.

Ⅲ、 Main Technical Parameters：

1.Maximum Test Force: 500 kN

2.Test Force Range: 5–500 kN

3.Test Force Resolution: 1/500,000, constant throughout the range

4、 Deformation Measurement Range: 1%–100%, constant throughout the range

5、Deformation Resolution: 1/500,000, constant throughout the range

6.Test Force Accuracy: ≤ ±1% of the displayed value

7.Loading Speed: Adjustable from 100–5,000 N/s

8. Maximum Grip Distance: 2,500 mm

9.Speed Control Range: 0.01–50 mm/min (stepless adjustment)

10. Displacement Speed Accuracy: ±0.5%

11. Displacement Resolution: 0.001 mm

12.Maximum Tensile Stroke: 150 mm

13.Test Fixtures: φ17.8 mm, φ18.9 mm, φ21.6 mm (one set each)

14.Temperature Sensor Resolution: 0.1°C

15.Control Software: Specialized software based on the Windows operating system

16.Overall Dimensions (L×W×H): 2,800 × 660 × 1,200 mm

17. Main Unit Weight: Approx. 1,700 kg

18．Power Supply: Three-phase, 380 V, 50 Hz, 4 kW

Ⅳ、 Working Conditions

1.Ambient Temperature: 20°C ± 2°C

2.Relative Humidity: ≤80%

3.Environment: Free from vibration, corrosive substances, and strong magnetic interference

4.Power Voltage: 380 V, fluctuation ≤10% of the rated value

5.. Installation: Stable foundation with a horizontal level of 0.2/1,000

6. Grounding: Standard grounding with reliable grounding for the control system   

Ⅴ、Basic Configuration:

1.Testing machine mainframe (manufactured by Jinan Tianchen): 1 unit         

2.Fully digital multi-channel closed-loop control system (Jinan Tianchen): 1 unit

3.Relaxation-specific sensor (500 kN): 1 unit

4.Servo motor dedicated gearbox: 1 unit

5.Lenovo computer: 1 unit

6.Printer (HP): 1 unit

7.Specialized control software (Jinan Tianchen): 1 set

8.AC servo motor (TECO, Taiwan): 1 set

9.Temperature recording modules: 3 units

10.Steel strand-specific clamps: 1 set

11. Steel strand deformation measurement device: 1 set