Working Rationale:
1 Imitate human body sat in a chair and lean back action to test the back performance.
2 Place 250lbs 16 dia sand bag in the seat, apply a force that is initially 90 degrees ± 10 degrees to the plane of the backrest.
3. Record the testing cycle, evaluate the product performance.

Structure characteristics:
1 Multi-function testing equipment, out-force and traveling for selection.
2 Through change the position of Pulley to change out-force direction of air cylinder.
3. When the form-device left the Backrest, the back will return the original state without any resistance.
4 Precision manual pressure regulating valve ensure to get the stable and reliable output force and indicate from the digital display.
5 L style Baffle plate+Lstyle Pressure plate fix the base; Manual screw to keep pressing.
6 RPM disply can be adjusted.

Parameter:
More than 150kg out-force.
More than 1000mm testing platform
600mm Air cylinder traveling
Max Air cylinder Cyclic rate: 20 RPM;

Control System:
Force control: Precision manual pressure regulating valve +SMC Precision pressure sensor+Digital display.
Force transmission: Sliding of the fixed pulley block...
Automatic control: Touch Screen+PLC, Power off memory and breakpoint stop function.