Start with tube end with label 5.

1. Put the short tube into the pinch valve V2 in the back port.

2. Connect tube with "5" on the connector 5.

3. Put the other short tube into the pinch valve V2 at the front port.

4. Connect tube with label 6 on the connector 6.

5. Take the long end of the tube and run this through the back hole

6. Take connection tube and put the short tube in V1 through the back port.

7. Connect the tube with label 4 to connector 4

8. Take the long end of the tube and run this through the front hole

9. Connect tube "4" on the bob, connect tube "6" on the EC-sensor

• Connect tube with label 7 on the connector 7

• Connect tube labelled with waste to the waste bottle