Reference Manual

Draft
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.
§
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.
4
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).
1
2
1
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.
en
Maintenance 21QLX3 Liquid Module