6 Operation
59
R-220 Pro Continuous Operation Manual, Version A
6 Operation
This chapter gives examples of typical instrument applications and instructions on how to operate the
instrument properly and safely See also section 2 5 “Product safety” for general warnings
NOTE
Operation of the interface is explained in the operation manual of the Interface I-300 Pro
6 1
Evaporation in three steps
a
Preparational steps
•
System must be in good working order See final installation check, section 5 21
•
Check level of heating transfer medium as described in section 5 16
•
Fill the evaporating flask with the product to maximally slightly below the half Install the flask at the
Rotavapor
®
OR
Mount the flask and establish a weak vacuum e g 800 mbar Feed the evaporating flask via the feeding-valve to
maximally slightly below the neck of the flask
•
Close the splash protector if installed Select the target heating bath temperature and start heating
b
Evaporation process
•
Establish working pressure (see operation manual I-300 Pro)
•
Lift up the heating bath completely The evaporation will start shortly
•
With the heating bath at temperature start rotation and set rotational speed to the target value At this time the
cooling medium flow must be established!
•
NOTE the condensation zone of the cooler during evaporation!
Optimal cooling to evaporation ratio for safe use is reached at approx 75-80% condensation zone height at the
first condenser It is recommended to adjust the evaporation parameters to reach optimal condensation height
e g to alter the cooling medium flow during operation
•
Foam formation under vacuum can be interrupted manually at any time during evaporation
Press the 'Aearate' button in short steps to let the foam collapse
c
Continuous operation
•
Once distillation is running, the system can be switched to continuous mode by pressing the "Auto" button As a
result, the inflow and outflow are automatically controlled by the Rotavapor
NOTE
To remove solvent residues after evaporation remount the empty evaporating flask, close the system
and evacuate the system to a very low pressure Then aerate via the outlet of the receiving vessel and
the filler-cock Let the flask rotate to dry the seals at the gearbox thoroughly
