Metrohm 746 VA Trace Analyzer User Manual
Page 76
3.10 Connection of 700 Dosinos
746 VA Trace Analyzer / 747 VA Stand
3-49
6 Initialize Dosino
•
Switch on 746 VA Trace Analyzer using the mains switch 11
11.
•
Select dialog page "DOSIMATS".
•
Set parameter
V.tube in
of the desired Dosino to
0.7 mL
.
•
Set parameter
V.tube out
of the desired Dosino to
4.8 mL
.
•
Take pipetting handle by hand and put it into the waste beaker with the
pipetting tip down.
•
Select desired Dosino with the cursor keys <ç> or <è> and press
: The cylinder is filled and excess solution is expelled to
the waste beaker. All tubings up to the pipetting tip will have been filled at
the end of the initializing procedure.
7 Use pipetting handle for preparation of diluted solutions
•
Select dialog page "DOSIMATS".
•
Select desired Dosino and set parameters
C.init std
,
C.end dilution
and
V.end dilution
for preparing a diluted solution (details see section
5.3.3).
•
Put the pipetting handle into the waste beaker so that the pipetting tip is
at about the same level as the container with the concentrated solution
(e.g. standard) and press the softkey
.
•
If the dilution is carried out for the first time or if the previous dilution has
been terminated by
Preparing
Dosimat #X
appears. Press the black button on the handle.
•
After automatic aspiration of the dilution solution from the reagent bottle
the message
Aspirating standard
appears. Put the pipetting handle
into the concentrated solution with the pipetting tip immersed ca.
1
…
5 mm and press the black button on the handle.
•
After aspiration of the concentrated solution the message
Dispensing
solution
appears. Put the pipetting handle into the desired void con-
tainer with the pipetting tip touching the wall and press the black button
on the handle.
•
Concentrated and dilution solution are dispensed into the void container.
Afterwards the message
Next operation
/
press
ap-
pears. If you press the black button on the handle or
Dosino will be ready for another dilution, if you press
is switched to the exchange position.
8 Use pipetting handle in an operation sequence
•
Make sure that the 700 Dosino with the connected pipetting handle is
connected to the "Dos.1" socket of the 746 VA Trace Analyzer.
•
Enter the desired dispensing instructions for which the pipetting handle
should be used on the "OP. SEQUENCE" and/or "SEGMENTS" page. If
you enter a solution name
Soln.name
for this solution, make sure that no
Dosimat or Dosino is assigned for this solution on the "SOLUTIONS" page
(parameter
Pos.
must be empty). The following dispensing instructions
are allowed:
SMPL>M
,
CSOLN>M
,
ADD>M
,
RADD>M
,
DOS>M
,
PDOS>M
,
SDOS>M
.
•
Start program by pressing the
•
If the desired dispensing instruction is executed, the message for manual
dispensing appears (e.g.
DOS "SOLN.name" V.add" > M
).