Common problems and solutions of rotary evaporator

Common problems and treatment methods of rotary evaporators Rotary evaporators are relatively common experimental equipment.
Its basic principle is the vacuum distillation of distillation flasks under continuous rotation
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However, long-term use cannot avoid the occurrence of problems.
The following editors have sorted out common problems and solutions for everyone, hoping to help everyone
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1.
After the instrument is connected to the power switch, the power indicator light does not light up: if the power cord is not connected or wrongly connected, just connect the power cord; if the power switch or circuit board fails, stop using it immediately and contact the manufacturer.
Or contact professional maintenance personnel
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2.
The motor does not turn: if the indicator light of the electric control box is on, check whether the connection between the plugs inside and outside the electric box is loose or disconnected, and then re-insert the plug and connect the disconnection; if the indicator light of the electric control box or the digital display does not light up , you should update the fuse or confirm that the power supply is normal; if the inverter is affected by high-frequency interference, it will display "OU", and you can troubleshoot according to the inverter manual
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3.
The bath does not heat up: the green indicator light in the temperature controller is on but does not heat up, and the temperature controller displays "over" or "000", which can be solved by changing the heating coil, solid state relay or relay board, and the temperature controller.
Wire the probe or update the probe to fix
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 　　4.
The test content cannot be pumped by vacuum: there may be a solvent in the container, and it is limited by the saturated ejector pressure, the solvent needs to be emptied, and the bottle is empty and try again; the capacity of the vacuum oil pump decreases, and the oil (water) needs to be changed.
Carry out cleaning and maintenance; vacuum hose joints are loose, and the vacuum gauge leaks.
It is necessary to detect and eliminate the faults along the vacuum pipeline section by section; if there are debris in the discharge valve and pressure control valve, it can be cleaned; the glass wool sandwich panel is damaged and needs to be replaced.
or repair it
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 　　5.
The instrument emits abnormal noise: it may be that the sealing ring is worn, and a new sealing ring can be replaced; it may also be that the internal gear is worn, the driving part is lack of oil, and the motor is faulty.
In this case, stop using it immediately and contact the manufacturer or repair Master
.

 　　6.
Poor vacuum degree due to pressure leakage: It may be due to the wear of the glass rotating shaft, the wear of the sealing ring, the poor installation of the sealing ring, the aging of the sealing gasket of the air nozzle for decompression, and the aging of the vacuum hose, and the problem parts can be replaced
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 　　7.
Abnormal lifting: It may be that the circuit board or the motor is faulty, or the sliding bearing may be worn or rusted.
For this, the operator should immediately stop the operation of the instrument and contact professional maintenance personnel
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 　　The above is an introduction to the common problems and processing methods of rotary evaporators.
I believe that everyone has a corresponding understanding of this after reading, and mastering certain matters will be relatively handy when operating, and I hope it will be helpful to everyone
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