Metrohm 789 Robotic Sample Processor XL - Manual (Page 30)

1.7 The keypad
22 Metrohm Sample Processor, Introduction
Sequence control
START
The <START> key starts a method. A start is only possible when the
Sample Processor is in the normal operating condition, i.e. when the
display shows
ready .
If <START> is activated after an interruption (<HOLD>, see below),
then the sequence continues with the next command.
The <START> can also be used to carry out a single command line
in a run sequence (TRACE function), see p. 114.
STOP
The <STOP> key ends a method.
If a sample series is stopped manually with <STOP> then the final
sequence of a method will not be carried out. When the <STOP> key
is pressed the functions listed in the parameter menu under
>manual
stop will be carried out.
HOLD
LEARN The <HOLD> key interrupts a method sequence.
Connected peripheral devices (Titrinos, etc.) will not be stopped
automatically. Only the method sequence will be interrupted. In the
HOLD condition a method can be completely terminated with
<STOP> or continued with <START>.
After an error message in the method sequence the Sample Proces-
sor switches automatically to the HOLD condition after <QUIT>.