Owner manual

3.3 Installation of 747 VA Stand
746 VA Trace Analyzer / 747 VA Stand
3-7
3
Attachment of a 747 VA Stand for the 695 Autosampler
Switch off 746 VA Trace Analyzer using the mains switch 1111.
Plug one end of the third 6.2135.000 EBUS cable into connector of the
second EBUS cable and fasten together by tightening the screws in the
cable connector.
Plug the other end of the third EBUS cable into connection 3434 of the third
747 VA Stand and fasten to the instrument by tightening the screws in the
cable connector.
Using a screwdriver, set stand address 3535 of the 747 VA Stand to "3"
(arrow must point to the number "3").
3.3.2 Equipping the measuring head
The fixtures inserted in the openings and connections of the measuring head 4141 in
the 747 VA Stand depend on the working electrode selected (MME or DME) (see
Fig. 9). The fully equipped measuring head for operation with a multi-mode elec-
trode is illustrated in section 2 (Figs 7 and 8), that for operation with a rotating disk
electrode in section 3.5 (Fig. 16).
When equipping the measuring head for the first time, the best procedure is as fol-
lows:
1
Preparations
Prepare multi-mode electrode MME 3838 (details, see section 3.4) or rotat-
ing disk electrode RDE (details, see section 3.5) for operation.
Prepare reference electrode 4343 (details, see section 3.6) for operation.
Tilt back cover 2424 of measuring head arm.
2
Insert dummy stoppers
without automatic rinsing:
Screw dummy stopper 6262 (6.1446.040) into opening 7373.
Screw dummy stopper 6161 (6.1446.040) into opening 7474.
with and without automatic rinsing:
Screw dummy stopper 4242 (6.1446.040) into opening 7878.
Insert 6.2730.030 Stopper into enclosed nipple 4444 and push enclosed
O-ring over the stopper.
Screw nipple 4444 with stopper into opening 8080 by hand.
3
Insert 4-way microtip
Remove stopper from nipple 4444 and insert 4-way microtip 4747 into nipple
4444 as far as it will go.
Tighten nipple 4444 using a 6.2739.010 Wrench until the 4-way microtip 4747
can no longer move.
Pull the 4 lengths of PTFE tubing of the 4-way microtip 4747 in succession
from above through the opening 8686 (connection of 685 Dosimat, see
section 3.9; connection of 700 Dosino, see section 3.10).