Metrohm 746 VA Trace Analyzer - Manual (Page 65)

3 Installation
746 VA Trace Analyzer / 747 VA Stand
3-38
3.9.5 Installation and use of the pipetting equipment
The optional available Pipetting equipment is suited for pipetting and automatic di-
lution functions with 685 Dosimats. The following accessories have to be ordered in
addition to the standard equipment of the 747 VA Stand (see section 9.4 and 9.5):
• • 1 ×× 2.685.0010 Dosimat
•
• 1 ×× 6.2134.000 Cable 685 – 746
•
• 1 ×× 6.3014.213 Exchange unit (10 mL)
•
• 1 ×× 6.5611.010 Pipetting equipment
To install these accessories and ready a 685 Dosimat for pipetting and automatic
dilution functions, proceed as follows (see Fig. 20):
1 Connect 685 Dosimat to 746 VA Trace Analyzer
• Connect 685 Dosimat to the "Dos 1 … 4" socket of the 746 VA Trace
Analyzer by means of a 6.2134.000 cable (see Fig. 19). If the pipetting
equipment should be used for dispensing instructions in an operation se-
quence, the 685 Dosimat must be connected to "Dos.1".
2 Mount Exchange unit on 685 Dosimat
• Mount the Exchange unit on the 685 Dosimat (procedure, see section 2 of
685 Instructions for Use).
• Fill reagent bottle with ultrapure water which has been acidified (100 µ L
conc. HNO
3
per 1 L) and degassed (5 min vacuum with stirring).
3 Connect pipetting handle to 746 VA Trace Analyzer
• Connect pipetting handle to the "Control lines" socket of the 746 VA Trace
Analyzer by means of the attached cable. The second plug of this cable
can be used to connect other equipment to the "Control Lines" socket. As
soon as the pipetting handle is connected, the green pilot lamp on the
handle lights up indicating that it is ready for use.
4 Connect pipetting tubing to Exchange unit
• Unscrew the attached 6.1805.100 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 pipetting tubing onto
connection 2 of the flat stopcock on the Exchange unit
mounted on the Dosimat.
2
Fig. 20: Pipetting handle
Pipetting
tip
Green pilot
lamp
6.1562.040
Pipetting handle
Black start
button
6.1562.050
Pipetting tubing
Connection 685
Dosimat/700 Dosino
Connecting cable to 746 VA Trace
Analyzer ("Control Lines")