Rotary Evaporator common problems and solutions

Abnormal   Phenomena

Test   Content

Solution

Motor   Does Not Turn

1. Electric cabinet indicator light (or digital display) is   on, and check whether the connection line of the external plug inside the   electric cabinet is loose and broken. 2. Electric cabinet indicator light (or   number display) is not on. 3. Confirm that "1 "and" 2"   are normal. 4. Frequency converter receiving high frequency interference   shows "O.U.". 5. Display of converter protection function.

1. Replug the plug and connect the broken wire. 2. Update   the fuse or confirm no abnormal power supply. 3. Update the circuit board or   electric cabinet. 4. Receive the ground line or change the work place. 5.   Exclude according to the converter specification P33.

Non-heating bath

1, bath pot countless obvious. 2. The "OUT" or   "ON" green indicator light in the temperature controller is ON and   not heated. 3. When the temperature of the bath is lower than the set   temperature, the "OUT" or "ON" green indicator light in   the temperature controller is not ON. 4. The temperature controller displays   "OVER" or "000".

1. Detection power supply 220V. 2. Change the heating ring.   Replace the solid state relay or relay board. 3. Temperature change   controller. 4. Detect probe wiring or update probe.

Temperature bath pot to rush

1. When the temperature of the bath is higher than the set   temperature, the "OUT" or "ON" green indicator light in   the temperature controller will not go OUT. (1-2 ℃ is   normal) 2, temperature controller in the "OUT" or "ON"   green lights have been destroyed, continue to heat. 3. The digital display   bath temperature is much lower than the actual bath temperature.

1. Temperature change controller. 2. Replace solid state   relay or relay board. 3. Change the probe or temperature controller.

Vacuum pumping

1. The solvent in the container is limited by the pressure   of the saturated injector. 2. Vacuum pump capacity decreases. 3. Vacuum tube,   loose joint and leakage of vacuum gauge. 4. Pressure test of magnetic   particle flaw detector. In the absence of any solvent, shut off all external   butterfly valves and pipelines. 5. There are sundries in the discharge valve   and pressure control valve. 6. Broken glass wool sandwich board.

1. Empty solvent, empty bottle test. 2. Vacuum pump oil   change (water), cleaning and maintenance. 3. Detect and exclude in section   along the vacuum tube path. 4. The fabric is re-assembled. The grinding mouth   of the glass fiber wadding core plate is cleaned, vacuum silicone grease is   applied, and the flange mouth is aligned and tightened. Update failed seal   ring. 5.Wash. 6. Update or repair.

Motor speed (only the highest)

1, test whether tachogenerator coil circuit, seven core   plug by the multimeter "1, 2," the foot (plug to align the slots on   both sides) around 400 Ω normal resistance. 2. Short circuit between   generator coil and enclosure. 3. Generator magnetic ring does not work. 4.   The magnetic ring of the generator is broken.

1. Generator break, update the coil or connect the break   point. 2. Loosen the generator cover at the back end of the motor to   eliminate short circuit. 3. Tighten the M5 nut. 4. Update the generator   magnetic ring.

Motor heating

1, the motor temperature rise (shell temperature from room   temperature), delta T [2] 40 ℃ or less normal 2, delta T > 40 ℃ by   the right way to handle. 3. Flat display part is shiny, indicating motor   current overload, which shall be processed in the right method 2.

1. Do not have to deal with it, but can continue to use it.   2. Lower the flue blade and reduce the load. Is avoiding the rotational   covibration point. Adjust speed to moderate speed. Discharge the mechanical   part of abnormal resistance. Seal lubrication part is maintained by seal.