Metrohm 774 - Methods and Sequences

3.3 Methods and Sequences
774 Oven Sample Processor, Instructions for use
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3.3 Methods and Sequences
3.3.1 Designing a method
A method is made up of the following components:
• number of samples to be processed
• run sequences (start, sample and final sequences)
• Definition of the various instrument settings (report definitions, sample
changer settings, time-out settings, gas flow settings, dosing unit defini-
tions, manual stop options)
For details about instrument settings please refer to page 67ff.
Sequences
A sequence is a series of commands which are carried out in the defined
order when a series of samples is being processed. Functions for control-
ling the oven temperature, gas flow, lift and for moving the turntable are
available. External instruments (titrators, Coulometers, Dosimats, etc.) can
be controlled by efficient commands. In a sequence the further settings for
the individual instrument components and dosing units (700 Dosino or
685 Dosimat) can also be defined or altered.
Processing a sample series is carried out in three phases. These are:
Start sequence: Command sequence which is carried out once at
the start of the series.
Sample sequence: Command sequence which is carried out for
each sample.
Final sequence: Command sequence which is carried out once at
the end of the series.
sample sequence
start sequence final sequence
<START>
number
of samples
normal state
Course of a method