A brief discussion on the operating procedures of hydraulic universal testing machines

1. Connect the power cord and press the "Power" button. The indicator light is on.

2. Select the range according to the sample specifications, hang or remove the weight on the swing rod, and adjust the buffer handwheel if necessary.3. According to the shape and size of the sample, install the corresponding jaw into the upper and lower jaw seats.4. On the drum of the depictor, roll the recording paper (graph paper).5. Turn on the oil pump and unscrew the oil feed valve to raise the table plate by about 10mm, and then close the oil feed valve. If the platen is already in the raised position, there is no need to start the oil pumping first, just close the oil supply valve.6. Clip one end of the sample into the upper jaw. For models equipped with hydraulic chucks, press the "Tight Up" button on the control box to clamp the sample.7. When the platen has risen and the oil return valves are closed, the adjustment finger is aimed at the zero point of the accuracy dial. (It should be operated without pressurization)8. Start the lift motor to adjust the tensile test space and clamp the sample vertically. For models equipped with hydraulic chucks, press the "Tight Down" button on the control box to clamp the sample vertically.9. Put down the pen of the push rod and enter the drawing state.10. According to the test requirements, the boost speed should be required and the oil supply valve should be slowly unscrewed for the boost test. Close the oil supply valve after the sample is broken. The following test interval is long, and the oil pump should also be stopped.11. Lift up the depiction pen that records the value.12. After opening the oil return valve to unload the force, turn the driven needle back to zero point.

13. Remove the broken sample. For models equipped with hydraulic chucks, first press the "Relax" button to loosen the upper jaw, then press the "Relax" button to loosen the lower jaw, and remove the broken samples respectively.

Jinan Hengsi Shanda Instrument Co., Ltd. News Editorial Department