Metrohm 730 Sample Changer - Manuel (Page 120)

4.7 Pipetting with the Swing Head
730 Sample Changer, Detailed Description 117
Configuration
Dosino 1: Pipetting Dosino
Dosino 2: For dosing auxiliary solution 1
Dosino 3: For dosing auxiliary solution 2
Sample rack 6.2041.400 for 126 x 15 mL and 2 x 250 mL vessels
Lift positions: Working position: Tower 2, lift height for titration
Rinsing position: Tower 1, lift height for rinsing pipette tip
Shift position: Tower 1 and Tower 2, lift position for shifting
the sample rack
Special position: Tower 1, pipette tip submerged in sample to
aspirate the solution
Lift position 5: Tower 1, pipette tip above the sample solution
Lift position 6: Tower 2, pipette tip submerged in titration
solution to eject the sample solution
Lift position 7: Pipette tip on scraper
Special beaker positions: Spec 1: Titration vessel
Spec 2: Rinsing vessel
Spec 3: Scraper
To scrape away any drops of liquid remaining on the pipette tip after rinsing the pipet-
ting tube, a "scraper" needs to be installed. This can be e.g. a test tube with a 1 mL
pipette tip for air cushion pipettes fixed at its center. The position of the "scraper" is
defined as special beaker 3.
730 Sample Changer 730.0013
Parameters
method PipMeth1
number of samples: rack
>start sequence
1 CTL:Rm: INIT
2 MOVE 1 : spec.2
3 LIFT: 1 : rinse mm
4 DRIVE.PORT 1.4: dos.
5 DOS: 1 : eject ml
6 LIFT: 1 : shift mm
>sample sequence
1 MOVE 2 : spec.1
2 LIFT: 2 : work mm
3 DOS: 2 : 100 ml
4 DOS: 3 : 2 ml
5 STIR: 1 : 5 s
6 LIFT: 2 : shift mm
7 MOVE 1 : spec.2
8 LIFT: 1 : rinse mm
9 DOSRATE 1 15
10 FILLRATE 1 15
11 DOS: 1 : fill ml
12 DRIVE.PORT 1.4: dos.
13 DOS: 1 : 5 ml
14 DRIVE.PORT 1.1: dos.
15 DOS: 1 : eject ml
16 DOSRATE 1 5
17 FILLRATE 1 5
The start sequence consists of commands which prepare
the system for pipetting.
To remove air bubbles from the system, the content of the
cylinder is ejected via port 4.
Titration vessel in front of tower 2
Auxiliary solution 1 added to the titration vessel
Auxiliary solution 2 added to the titration vessel
Rinsing station in front of tower 1
Lift 1 rises to rinsing height
Dosing and filling rates for Dosino 1
Filling of cylinder
Cock opened to port 4
Ejection of 5 mL of water via port 4
Cock opened to port 1
Content of cylinder ejected via pipetting tube
Dosing and filling rates for Dosino 1