Metrohm 789 Robotic Sample Processor XL - Manual (Page 48)

2.4 Connecting up accessories
40 Metrohm Sample Processor, Installation
2.4 Connecting up accessories
2.4.1 Connecting rinsing and aspiration equipment
Both the existing built-in membrane pumps and ex-
ternal pumps can be used for rinsing the titration
head and aspirating off samples that have been
processed. The necessary tubing is supplied with
the corresponding Metrohm instruments and is eas-
ily mounted on the Sample Processor.
Attach the tubing for the spray nozzles and the aspi-
ration tip according to the diagram on the left and
lead them through the guide chain.
Fig. 17 Distributor piece
Spray nozzles
Spray nozzles (6.2740.030) can be used for rinsing electrodes and dos-
ing tips.
The spray nozzles are inserted in the oblique openings of the titration
head. These are connected to the distributor block on the guide chain
with tubing (6.1805.420). The three distributor block openings (M6) pro-
vided for them must all be occupied. Any unoccupied openings must
be sealed with an M6 threaded stopper (6.1446.040) to prevent liquid
escaping during the rinsing process.
The tubing is attached to the guide chain. It may be necessary to re-
move the stud of the first link in the chain.
to spray nozzles
from rinsing solution
to waste canister
from aspiration tip