Metrohm 797 VA Computrace - Manual (Page 23)

2.2 Installation of the 797 VA Computrace Stand
797 VA Computrace / Hardware-Manual 8.797.8001EN
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3 Insertion of 4-way microtip (option)
For automatic solution addition with Dosinos or Dosimats, the 6.1824.000 4-
way microtip has to be installed. Proceed as follows:
• Remove stopper from nipple 27 and insert 4-way microtip 30 into nipple as
far as it will go.
• Tighten nipple using a 6.2739.010 Wrench until the 4-way microtip can no
longer move.
• Pull the 4 lengths of PTFE tubing of the 4-way microtip in succession from
above through the opening 68 (connection of Dosinos or Dosimats see sec-
tion 2.8).
4 Install stirrer or RDE
in operation with MME:
• Insert stirrer (6.1204.200) in opening 63 as far as it will go.
• Stretch drive belt 32 (6.1244.020) between drive wheel 35 and drive shaft
of the stirrer.
in operation with RDE:
• Screw electrode tip 98 (6.1204.XXX) to drive shaft 99 (6.1204.210) (see
also section 2.4).
• Insert RDE in opening 63 as far as it will go.
• Stretch drive belt 32 (6.1244.020) between drive wheel 35 and drive shaft
99 of the RDE.
• Attach electrode cable 20 (WE) to the RDE: push cable lug under the screw
and then tighten screw firmly.
Fig. 6: Measuring head arm
23 Measuring head arm
24 Measuring head
54 Opening
for auxiliary electrode 43 (6.0343.000 Pt
- auxiliary electr. or optional GC electr.
comprising 6.1241.020 Electrode holder
and 6.1247.000 GC tip)
59 60 61 62 65 66 67 68 69 70 64 63
54
24
57
58
23
55
56