Metrohm 730 Sample Changer - Manuel (Page 52)

3.5 Methods and Sequences
730 Sample Changer, Introduction 49
3.5 Methods and Sequences
3.5.1 Composition of a Method
A method consists of the following parts:
• Number of samples to be processed
• Process sequences (start, sample and final sequence)
• Definition of the various instrument settings (changer settings,
stirrer speed, definition of the dosing units, manual stop op-
tions)
For details about the instrument settings see page 87ff.
Sequences
A sequence is a succession of commands that are carried out in
the order specified during automatic processing of a sample se-
ries. There are functions for controlling up to four stirrers, four
pumps, (rinsing and aspiration), two lift stations (towers) and for
moving the turntable (racks). External instruments such as titration
instruments, pH Meters, Ion Meters, Dosimats, etc. can be con-
trolled using the corresponding commands. Furthermore, the set-
tings for the individual instrument components and dosing units
(700 Dosino or 685 Dosimat) can be defined within a sequence.
Processing a sample series is accomplished in three phases.
These are:
Start Sequence: Sequence of commands that is executed
once at the beginning of a series.
Sample Sequence: Sequence of commands used for each
sample.
Final Sequence: Sequence of commands that is executed
once at the end of a series.
Course of a method
Sample seq.
Start sequence End sequence
<START> Normal state
Number
of samples