At Siemens AG in Fürth, the drying time in the cleaning of heavily polluted electronic/electromechanical assemblies was reduced by more than 13 hours through the use of the Memmert vacuum oven VO.

Before the parts are stored for drying in the oven, they pass through an ultrasonic bath containing detergent and are then rinsed for two to three minutes with tap water. Before the actual drying process, waterdrops are blown away with compressed air.

The drying procedure until now:

• Drying the assemblies in a conventional drying oven at approx. 60 °C with an air fan at maximum speed and air flap completely open
• Drying time approx 16 hours

The new drying procedure:

• Drying the assemblies in the Memmert vacuum oven VO at approx. 60 °C and 14 to 16 vacuum drying cycles (always alternating between 50 and 900 mbar)
• Drying time approx. 2 to 2.5 hours