Description
- The pumping tray is mainly used for various experimental experiments involving vacuum in middle school physics and elementary school teaching.
- The suction plate consists of a base, a bell jar, an electric bell, a rubber seal and a valve.
- Before the experiment, a layer of Vaseline (self-prepared) should be applied around the rubber seal and the valve cone, and the nut of the valve should be tightened.
- Install the battery (self-provided), turn on the switch, the bell rings, and then put the bell cover on the base, you can still hear a clear electric ringing sound through the bell.
- Connect the pumping equipment (self-prepared) to remove the air inside the hood, the electric bell will gradually weaken until the sound is not heard, close the valve on the base, let the students observe that the bell of the bell is still ringing constantly, but Can't hear the sound.
Low pressure boiling experiment:Put a cup of hot water that has stopped boiling into the bell jar, then pump it to see the hot water in the cup boil.In addition, the pumping tray can also be used as: vacuum fountain, evaporation icing, vacuum coating, atmospheric pressure and other experiments.maintenance:The main components of the pumping disc are high-strength plastic products. Avoid burning, sharp marking and hard impact during use.
