Reference Manual

Table Of Contents

Draft

Maintenance28 Q3 Dosing Module

The liquid dosing head is installed on the dosing or liquid module.

A sample vessel is on the weighing pan, big enough for the quantity of liquid in the liquid tube.

1 Empty the liquid tube by replacing the bottle by an

empty bottle and using the Purge function.

ð The liquid tube is empty.

2 Release pressure.

3 Remove the dosing head from the dosing or liquid

module.

WARNING: Injury or contamination from

hazardous substances. Be aware of any liquid

draining from the tubing and the valve.

Open the dosing head with the micro dosing valve tool.

5 Take out the micro dosing valve and clean it, e.g., in an ultrasonic bath.

6 After the cleaning, reinstall the micro dosing valve and refill/replace the bottle.

6.2 Replacing the sealing ring and fastening nut on the liquid tube

CAUTION

Injury due to splashing liquids

If the pressure in the bottle is not released, liquid might splash when removing the micro

dosing valve, opening the bottle, or removing the liquid tube.

− Always release pressure before removing the micro dosing valve, opening the bottle, or

removing the liquid tube.

Removing the sealing ring and the fastening nut

If liquid is leaking from the dosing head nut, replace the sealing

ring and fastening nut at the dosing head (1). If pressure cannot

be built in the bottle, replace the sealing ring and fastening nut at

the bottle cap (2).

Pressure is released.

1 Unscrew the fastening nut at the dosing head or the

bottle cap.

2 To access the sealing ring (1), slide back the fastening

nut (2).

3 If changing the nut and ring at the bottle cap, remove

the suction filter and slide the sealing ring all the way

to the bottle-end of the tube.

4 Cut off the tube above sealing ring (1). Check that the

end of the tube is straight.

5 Remove the fastening nut.

Reconnecting the liquid tube

Insert the new sealing ring and fastening nut and reconnect the liquid tube.