... the necessary tools for oil, chemical, metallurgical, textile, food, medicine and health, environmental, biochemical laboratory, analysis room, ... Maintenance:1. Placed correctly for the liquid bottle ( or other vessels )2. Adjustment and calibration of the ... function, turn the knob to the "timing" position or "normal open" position.5. Set the speed ... Stirrer/power basic stirrer/motorstirrer/Blender