Metrohm 774 Oven Sample Processor - Manual (Page 82)

5 Detailed description
774 Oven Sample Processor, Instructions for use 76
5.4 Command reference
The following commands are programmable within a sequence. Most of
them are also available in manual operation but may vary partially in their
operation or exhibit a limited parameter selection; see page 31ff.
The following listing is valid for the programming of process sequences.
SAMPLE
7
SAMPLE >start sequence
1 SAMPLE: = 1
=,+,- 1…999
Define first sample
The SAMPLE command can determine which rack position is to be the po-
sition of the first sample (SAMPLE = X). This is stored as a index variable.
It may be modified for example, in a sample sequence (SAMPLE + X or
SAMPLE - X), in order to control the course of a sample series during proc-
essing.
The SAMPLE command does not have to be used for simple applications.
As a general rule the first sample of a series is assumed to be in rack posi-
tion 1 unless specified otherwise. Therefore it is recommended not to place
the special beakers in the first rack positions; place them in the highest po-
sitions instead.
Before starting a sample series , the position of the first sample can be de-
fined with the <SAMPLE> key in manual operation, as long as this has not
been defined in the method itself.
If a certain sample beaker order is needed for each application of a
method, the position of the first sample can be defined in the start se-
quence with ‘SAMPLE = X’ and this setting can be saved with the corre-
sponding method.
If the SAMPLE command is not executed during a sample sequence, the
SAMPLE variable will be increased by 1 after every processing of the sam-
ple sequence.
MOVE
8
MOVE >sample sequence
2 MOVE 1 : sample
1 sample,
spec.1…8
1…999
Beaker positioning / Turn rack
The first parameter of this command defines the
destination of the rack's MOVE command. Since
the 774 Oven Sample Processor is euipped only
with Lift 1, it is not practical to enter any other
value at this point.
The MOVE command can place the current sample or a special beaker in
front of the tower (1) by rotating the rack. An absolute rack position can
also be specified.
During method processing a MOVE command can run the lift to the shift
position.
The turning direction is automatically chosen by the changer according to
the predefined changer setting. In the Parameter Menu under “>changer