Seek instructions for operating the YU-60A piston pressure gauge

Operation ①: The piston-type pressure gauge should be placed on a sturdy, vibration-free workbench that is easy to operate. Use the horizontal adjustment screw to adjust the level, so that the bubble in the level gauge is positioned in the center. ② Rotate the handwheel of the manual pump to check whether the oil flow is unobstructed; once it is normal, the pressure gauge can be installed for calibration. ③ Open the oil cup valve and turn the handwheel clockwise to fill the cylinder of the hand-cranked pressure pump with oil. ④ Close the oil cup valve, open the needle valve, and turn the handwheel clockwise to generate initial pressure, lifting the load-bearing tray until it aligns with the ink marks on the positioning indicator cylinder. ⑤ Increase the weight of the weights to generate the desired calibration pressure. When adding weights, the pressure pump handwheel must be turned accordingly to prevent the load tray from descending. During operation, the tray must be rotated clockwise, with the angular velocity maintained between 30 and 120 revolutions per minute. To overcome the effect of frictional resistance. ⑥ Once calibration is complete, turn the left-hand knob to gradually remove the weights, and finally open the valve on the oil cup to remove all the weights. When closing the valve of the pressure gauge, ensure there is no leakage and do not use excessive force.