Metrohm 746 VA Trace Analyzer User Manual
Page 357
5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-206
Parameter
Range; Default value / Meaning
Calc.f.
A##; A##; A## (## = 01...15); -
Alternative results
If the test condition is met, the alternative results
A##
(max. 3) entered
here are activated, i.e. the corresponding formulae
A##=.....
on the
"CALCULATION" page are set to active for the calculation and marked
with an asterisk (
*
).
Either a space or the
;
character must be entered between the
A##
values.
Description
The
(CASE
instruction opens a decision block which can contain any
type of instructions and is closed with the
CASE)
instruction. On the
basis of the test condition contained in the
(CASE
instruction as a
parameter (see
(Test)
), a decision is made during the program run
whether or not the instructions which follow in the block are executed:
•
If the test condition is met (true), the instructions which follow in the
decision block are executed up to the next
CASE
,
EXIT
or
CASE)
instruction and a jump then made to the end of the block.
•
If the test condition is not met (false), the instructions which follow in
the decision block are ignored up to the next
CASE
,
EXIT
or
CASE)
instruction.
As an option, alternative results can also be specified which should be
activated when the test condition is met (see
Calc.f.
).
Comments
•
Any number of CASE blocks
(CASE ... CASE)
in succession are
permitted in a program.
•
Maximum 2 CASE blocks can be nested, i.e. a second case block
may be located within a CASE block.
•
A CASE block may contain any number of additional
CASE
instruc-
tions. After the first
CASE
instruction whose test condition is met,
however, no further
CASE
instruction is tested and a direct jump
made to the end of the CASE block.
•
For test conditions with evaluation values
EV:<subst>
or mass
concentrations
MC:<subst>
, it must be borne in mind that these
values are set to 0 if no evaluation was possible. This can be used for
detection of this specific case (see examples).