Metrohm 746 VA Trace Analyzer - Manual (Page 352)

5.7.3 Alphabetical instruction list
746 VA Trace Analyzer / 747 VA Stand
5-201
(CAL Page: O, S Stand: M, A Abbreviation: (C
Instructions t/s Main parameters Auxiliary parameters
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## .. (CAL .....
Function Start of the loop for the recording of a calibration curve.
Description The (CAL instruction opens a loop for recording a calibration curve with
both the calibration technique with calibration curve cal.crv. and that
with the internal standard int.std. . The CAL loop must be closed with
the CAL)n instruction.
In calibrations with a calibration curve, for the recording of this curve
the CAL loop must include one of the dosing instructions CSOLN/M ,
CSOLN>M or CSOLN/F for addition of the calibration solutions as well as a
sweep or segment call-up. In addition, any other instructions can be
incorporated.
In calibrations with an internal standard, for the recording of the
calibration curve for the determination of the proportionality factor the
CAL loop must include one of the dosing instructions
CSOLN/M , CSOLN>M
or CSOLN/F for addition of the calibration solutions, the instruction
RADD>M or RADD>F for addition of the internal standard as well as a
sweep or segment call-up. In addition, any other instructions can be
incorporated.
Comments • A program can contain several CAL loops, but they must not be
nested.
• REP loops are allowed within CAL loops, a CAL loop can also be
inserted within a REP loop.
• No ADD or VAR loops are allowed within CAL loops.
• It is advantageous to insert the ØMEAS instruction in the CAL loop to
switch off the electrode voltage when the solution is changed.
• If the entire analysis solution is changed each time during recording
of the calibration curve, a
RINSE instruction must be incorporated in
the CAL loop which resets the volume bookkeeping in the measuring
vessel to 0 (see also
RINSE). If its parameter Cycles > 0 is set, the
measuring vessel is also rinsed by means of the two rinsing Dosinos
connected to the 746 VA Trace Analyzer or the 695 Autosampler. If no
rinsing Dosinos are connected, the prompt
Change measuring
vessel to change the solution appears.
• Without a RINSE instruction, the volume in the measuring vessel is
added continuously. This can be utilized for the recording of calibra-
tion curves in which the calibration solutions are prepared each time
by manual addition of a concentrated standard solution to the meas-
uring vessel (see
CSOLN>M).
• The number of calibration solutions is defined in the CAL)n instruc-
tion. A valid mass concentration Mass conc. must be entered on the
"SUBSTANCES/Calibration" page for each of these solutions.