Metrohm 824 Easy Sample Changer - Manual (Page 53)

8.4 Connecting rinsing and aspirating equipment
824 Easy Sample Changer, Annex
47
8.4 Connecting rinsing and aspirating equipment
Depending on the model (see above) the Metrohm 772 Pump Unit is
delivered with accessories needed for rinsing or aspirating.
8.4.1 Attaching the distributor and tubing
To use aspiration tubing and/or the spray
nozzles the 6.1808.160 distributor must be
attached.
With the screws provided attach the distributor
on the rear side of the changer tower.
Connect the tubings of the spray nozzles and
the aspiration tube according to the drawing
on the left. The tubings are then led through
the tubing guide 12.
Fig. 22 Distributor
8.4.2 Spray nozzles
The M6 spray nozzles (6.2740.020) can be used for rinsing the elec-
trode in combination with a pump (e.g. Metrohm 772 Pump Unit). Spray
nozzles can be used with the macro- and micro-titration heads. The 3
spray nozzles are inserted into the slightly oblique openings of the titra-
tion head. These are connected to the distributor (6.1808.160) by using
the FEP tubing supplied, see above. All three openings with M6 threads
must be occupied.
The lengths of tubing are led through the tubing guide.
Polyethylene canisters (Metrohm Order. no. 6.1621.000) can be used
as rinsing canisters for aqueous media.
If organic solvents are used for rinsing then the chemical resistance of
the pump tubing must be taken into account.
from aspiration tip
to spray nozzles
from rinsing canister
to waste