Festo 8079862, Руководство по эксплуатации

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Filtration Learning System
39
© Festo Didactic 696684
9 Function
9.1 Function as individual station
After the process is started, the liquid is fed to a filter with the waste water pump. From there, it enters the
process water tank via a butterfly valve. In a second function sequence, the liquid from the process water
tank is returned to the waste water tank. During this rinsing process, the pump of the downstream station
pumps the liquid via a 3-way ball valve in the opposite direction through the filter. The liquid in the waste
water tank can also be stirred to prevent the dirt particles from settling.
Before filling, close the hand valve in the drain line. The intended inlet line for the connection of an upstream
PA station and the outlet line to a downstream PA station must be closed with blind plugs. Pour the liquid
directly into the waste water tank from above.
After completion of the experiments, the tank is emptied via the manual valve in the drain line. To do this,
insert a suitable piece of pipe or hose at the end piece to drain the medium into a bucket or similar.
9.2 Operation as a downstream station
The Filtration station can be combined with the individual stations of Mixing, Reactor, and Bottling to form a
single system. Various variants are possible:
•
Upstream PA stations: Mixing Station, Reactor Station, Bottling Station
• Downstream PA stations: Mixing Station, Reactor Station, Bottling Station
If the Filtration station is the first station, the liquid is fed directly into the waste water tank, as with the
individual station. In operation as a downstream station, the tank is connected to the pump of the upstream
station via the end piece on the supply line. For the transfer processes, the manual valve in the discharge
line and in the inlet must be opened. The liquid is then pumped from the pump of the upstream station into
the tank of the Filtration station. At the end of the filtering process, the liquid is conveyed by the pump to
the downstream station when the pump signals "Station ready" via communication. If the downstream tank
is already filled with liquid, the pumping process cannot be started.
Communication between the MPS PA stations takes place via 4mm safety laboratory cables and the
communication fields, as with MPS-D stations. Tank overflows in the Filtration station are monitored using
float switches. The overflow protection is coupled to upstream and downstream stations using an optical
transmitter and receiver.