Cleaning The Weighing Chamber; Cleaning Powder Dosing Heads; Cleaning The Liquid Dosing Elements - Mettler Toledo Q3 Manual De Usuario

6.1.3 Cleaning the weighing chamber

The dosing module is in its uppermost position.
The dosing head is removed.
The sealing insert is removed.
The draft shield is removed.
1 Tilt the top panel (1) upwards and remove.
2 Remove any adapter holder or ErgoClip, the weighing
pan, and the drip tray.
3 Clean the weighing chamber. Wipe the covering strip (2)
gently using vertical movements.
WARNING: Damage to the covering strip. The
covering strip is delicate and must be handled with care.
4 Reassemble all parts in reverse order.
5 Put the balance into operation.
For more details about cleaning and putting into operation after cleaning, see "Maintenance" in the Reference
Manual of the balance.

6.1.4 Cleaning powder dosing heads

Powder dosing heads are designed to be used with a unique substance. METTLER TOLEDO does not
recommend cleaning them. When dosing a different powder, use a new dosing head to avoid contamination.

6.1.5 Cleaning the liquid dosing elements

Cleaning the suction filter
1 Once a week, check visually that the suction filter is clean. If necessary, rinse the suction filter with solvent
using the Purge function on the terminal or replace the suction filter.
2 At least once a year, change suction filter. Maintenance interval depends on the liquid used.
Purging the liquid dosing head
The liquid dosing head can be rinsed/purged by letting a large quantity of solvent (or another liquid) run
through it. Use the Purge function. See the Reference Manual of the XPR balance.
The bottle is filled with enough solvent to purge the dosing head.
A big sample vessel is on the weighing pan to collect the solvent used to purge the dosing head.
The liquid dosing head is installed on the dosing or liquid module.
Use the Purge function on the terminal to rinse the dosing head.
Cleaning the micro dosing valve
The liquid dosing heads QL001 have a micro dosing valve that can be disassembled and cleaned, for
example, in an ultrasonic bath.
Note
The QL003 dosing head does not contain a micro dosing valve. Cleaning this dosing head using the Purge
function is sufficient (see above).
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.
The pressure is released.
1 CAUTION: Injury due to splashing liquids. Make sure that the pressure in the bottle is released.
Empty the liquid tube by replacing the bottle by an empty bottle and using the Purge function.
The liquid tube is empty.
2 Release pressure.
Q3 Dosing Module
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