How to use the rotary evaporator and matters needing attention

Usage: 1 Height adjustment: manual lifting, turn the hand wheel on the column, turn it up in sequence, and turn it down in reverse Electric lifting, touch the up key by hand to raise the main engine, and touch the down key by hand to lower the main engine 2 There are two external connectors on the condenser for cooling water, one for water inlet, the other for water outlet, and generally for tap water, The lower the condensate temperature is, the better the effect will be The upper port is equipped with a vacuum connector, which is connected to the vacuum pump sheath pipe for vacuum pumping 3 Before starting the machine, first turn the speed control knob left to Zui small, press the power switch indicator light to light, and then slowly turn it right to the required speed Generally, medium and low speed solutions with high viscosity are used for large evaporation bottles The flask is standard interface 24, with 500ml attached randomly, 1000ml two kinds of flasks, the amount of solution is generally not more than 50% Precautions: 1 The glass parts should be handled with care, cleaned, dried or dried before installation 2 Each grinding port, sealing ring and joint should be coated with a layer of vacuum grease before installation 3 Water must be added before the heating tank is electrified, No dry burning without water is allowed 4 If the vacuum cannot be pumped up, it is necessary to check (1) whether the joints and interfaces are sealed (2) whether the sealing ring and sealing surface are effective (3) whether the vacuum grease between the main shaft and the sealing ring is well coated (4) whether the vacuum pump and its skin tube are leaking (5) whether the glass parts are cracked or broken, Phenomenon of damage