Metrohm 797 VA Computrace - Manual (Page 51)

2.8 Connection of Dosing devices
797 VA Computrace / Hardware-Manual 8.797.8001EN
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2 Insert 4-way microtip in 797 VA Computrace Stand (see section 2.2.4)
• Remove stopper from nipple 27 and insert 4-way microtip 30 into nipple as
far as it will go (see Fig. 3 and Fig. 6).
• Tighten nipple manually, so that the 4-way microtip can no longer move.
• Pull the 4 lengths of PTFE tubing of the 4-way microtip 26 in succession
from above through the opening 64.
3 Connect PTFE tubing to Exchange unit
• Unscrew the attached 6.1805.020 FEP Tubing (L = 40 cm)
from connection 2 (connection for burette tip) of the flat
stopcock on the Exchange unit mounted on the Dosimat.
• Screw connection nipple of the PTFE tubing of the
4-way microtip 30 onto connection 2 of the flat stopcock
on the Exchange unit mounted on the Dosimat.
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4 Close unused PTFE tubing
• Screw a 6.1808.000 Coupling (accessory of 797 VA Computrace Stand) on
each unused PTFE tubing of the 4-way microtip 30.
• Screw a 6.1446.040 Dummy stopper (accessory of 797 VA Computrace
Stand) on each 6.1808.000 Coupling.
5 Initialize Dosimat(s)
• Switch on the 797 VA Computrace Stand using the mains switch 14.
• Switch on the PC and start the 797 VA Computrace program.
• Open the
Dosinos tab (if the Dosino is connected to the 846 Dosing Interfa-
ce: the Dosing Interface tab) of the window General settings and enter the
following configuration:
• Note: The maximum allowed dose rate is 2 mL/min if the 4-way microtip is