VDL (E3) 09/2019 Page 92/234
After completing the drying process or when cancelling the drying process
When the pressure drops to pump pressure, the drying process is finished. If the drying monitoring (chap.
11.6) is activated, a corresponding message is displayed.
• Make sure that the technical ventilation is activated
• Make sure that equipotential bonding has been established according to the grounding con-
cept
□
• For ventilation, set the pressure set-point to atmospheric pressure
• Switch the vacuum drying oven on the controller to standby mode (not completely de-
energized)
□
• Make sure that the user's equipment is ESD protected.
• Remove the drying material
□
• Continue sweeping the electrical installation area and instrumcontroller housing for at least
15 minutes. Check the excess pressure of at least 25 Pa on the manometer. Only then shut
off the compressed air or inert gas supply
□
For emptying the pump
• Make sure that the vacuum drying oven is de-energized (power plug disconnected) and the
pump is turned off.
□
• Make sure that the technical ventilation is activated
• Make sure that equipotential bonding has been established according to the grounding con-
cept
□
• Make sure that the user's equipment is ESD protected.
• Remove the full condensate catchpot of the pump
□
Before starting a new drying process
In case of a new solvent with a different auto-ignition temperature:
• Determine the auto-ignition temperature of the solvent from its safety specifications. In the
case of solvent mixtures, use the lowest auto-ignition temperature
□
• Make sure that the technical ventilation is activated
• Make sure that equipotential bonding has been established according to the grounding con-
cept
□
• Sweep the area for electrical equipment and the triangle instrument box with compressed air
or inert gas for at least 15 minutes
□
• Turn on the chamber and check the settings (drying temperature, pressure set-point and
sag´fety controller setting)
□
• Now you can load the chamber and start the new drying process. Follow all safety measures
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