Metrohm 746 VA Trace Analyzer - Manual (Page 405)

5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-254
(PREP Page: O Stand: A Abbreviation: (P
Instructions t/s Main parameters Auxiliary parameters
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## .. (PREP .....
Function Start of the block for sample preparation on the 695 Autosampler.
Description The (PREP instruction opens a block for sample preparation on the
sample rack of the 695 Autosampler paralleling measurement. This block
can contain any number of instructions admissible for the sample
preparation and must be closed with the
PREP) instruction.
The PREP block must be called up with the >PREP instruction. As soon
as the program running for the current sample in the measuring vessel
allows, the instructions defined in the PREP block are executed with the
following sample on the sample rack of the 695 Autosampler.
Comments • The (PREP instruction can be used only in operation with the 695
Autosampler and must be entered on the "OP.SEQUENCE" page.
• Only one PREP block is admissible in a program.
• Only the following instructions are allowed in a PREP block:
SMPL/F, CSOLN/F, DOS>F, SDOS>F, RADD>F
DOS>A, SDOS>A, F>A
VMIX, VWASH
BEEP, NOP, REM, SCANCTRL, SETCTRL
• A PREP block runs only when the automatic series determination
(
Auto.batch = on ) on the "MONITORING" page is switched on and if
the same method is used as for the previous sample.
• If the automatic transfer of sample data is switched on ( Auto.samples
= on ), the PREP block is executed with the next sample entered on
the "SAMPLES" page at the position on the sample rack specified
under
Pos. . The sample data of this sample appear on the 2 nd sam-
ple data line on the "MONITORING" page.
• If the automatic transfer of sample data is switched off ( Auto.samples
= off ), the sample preparation block is automatically executed with
the next sample on the sample rack.
• If a voltage is applied to the electrodes in the measuring vessel (by
MEAS or SWEEP instructions), no instructions from the PREP block can
be executed. As the voltage is retained on completion of the MEAS or
SWEEP instruction, the execution of instructions from the PREP block
within a program is not possible until the voltage has been switched
off with
ØMEAS .
• Instructions from the PREP block which need the functions of the 695
Autosampler can not be executed simultaneously with instructions
from the main program which also use such functions (e.g.
DOS>M ,
RINSE ).
• Instructions of the PREP block which have not yet been executed at
the end of the program are then run to completion.