Metrohm 746 VA Trace Analyzer - Manual (Page 75)

3 Installation
746 VA Trace Analyzer / 747 VA Stand
3-48
3.10.6 Installation and use of the pipetting equipment
The optional available Pipetting equipment is suited for pipetting and automatic di-
lution functions with 700 Dosinos. 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 ×× 2.700.0010 Dosino
•
• 1 ×× 6.1567.210 Dosing unit (10 mL), without accessories
•
• 1 ×× 6.5611.010 Pipetting equipment
To install these accessories and ready a 700 Dosino for pipetting and automatic
dilution functions, proceed as follows (see Fig. 20 in section 3.9.5):
1 Connect 700 Dosino to 746 VA Trace Analyzer
• Connect 700 Dosino to the "Dos.1 … 4" socket of the 746 VA Trace Ana-
lyzer (see Fig. 21). If the pipetting equipment should be used for dis-
pensing instructions in an operation sequence, the 700 Dosino must be
connected to "Dos.1".
2 Mount Dosing unit and 700 Dosino
• Fill reagent bottle (bottle with GL 45 thread) with ultrapure water which
has been acidified (100 µ L conc. HNO
3
per 1 L) and degassed (5 min
vacuum with stirring).
• Screw 6.1829.020 Aspiration tube (accessory of 6.5611.010 Pipetting
equipment) to bottom of the 6.1657.210 Dosing unit (procedure, see sec-
tion 2.1 of the 700 Instructions for Use).
• Screw 6.1567.210 Dosing unit onto the reagent bottle.
• Clip 6.2052.010 Pipetting handle holder (accessory of 6.5611.010 Pipet-
ting equipment) to the white flange of the Dosing unit. The 6.1562.040
Pipetting handle can be stored in this holder with the pipetting tip pointing
upwards.
• Mount 700 Dosino on 6.1657.210 Dosing unit (procedure, see section 2.3
of the 700 Instructions for Use).
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 Dosing unit
• Screw connection nipple of the pipetting tubing onto connection 1 of the
Dosing unit mounted on the Dosino.
5 Prepare waste beaker
• Put 6.2754.000 Rinsing quiver onto the lip of an empty waste beaker.
Before starting any initialization, dilution or pipetting functions with the
pipetting handle, hold the pipetting handle so that any solution leaving
the pipetting tip is expelled into the waste beaker.