Metrohm 700 Dosino - Manual (Page 35)

3.3 Cleaning and maintenance
700 Dosino, Instructions for Use
29
3.3.2 Cleaning the stopcock washer and distributor disk
The stopcock washer and distributor disk must be checked
regularly. Blockages of the disk opening or the outlet ports
must be avoided at all costs.
Dismantle the dosing unit completely. The black stopcock washer
sits on the cylinder base and can be removed with a pair of for-
ceps or a bent paper clip.
Stopcock washer
(in cylinder base) Distributor disk with 4 ports
(in distributor)
Leave the white distributor disk in the distributor.
If the cock and distributor disks are stuck together they can be
separated in the following manner:
• Try to loosen the two disks by rotation.
• If this does not work place the two parts in water or an organic
solvent (i. e. ethanol) for a few minutes. It should now be possi-
ble to separate the disks by rotation.
Cleaning the stopcock washer and the distributor disk
• Use a liquid detergent. Abrasive powders are unsuitable and
could scratch the stopcock washer.
• Dry the disks with a lint-free soft cloth.