Metrohm 797 VA Computrace User Manual

Page 23

2.2

Installation of the 797 VA Computrace Stand

797 VA Computrace / Hardware-Manual 8.797.8001EN

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)

65 66