Metrohm 726 Titroprocessor - Manual (Page 201)

8. Command reference 8. Command reference
726 Titroprocessor, Instructions for use 195 195
Command Parameters Parameters
ДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД
(CASE Condition
... ...
CASE Condition
... ...
EXIT Condition
... ...
CASE Condition
... ...
)CASE
A CASE sequence is processed so that all CASE conditions are individu-
ally checked step by step in sequence. As soon as one of the conditions is
applicable all the sequence of commands following this CASE command
will be carried out up to the next CASE command. After this has been proc-
essed the CASE sequence will be exited without checking the other condi-
tions.
A conditional premature exit from the CASE sequence can be forced with
the EXIT command, for which an analogous condition may also be given.
The command process will be continued with the first command line after
the )CASE end marker.
If none of the conditions apply the CASE sequence will be exited without
any further commands being carried out and the method run continued with
the next command.
Simple example
Command Parameters Parameters
ДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД
MEAS_PH* pH measurement
Sensor comb. glass Signal drift 50 mV/min
Meas. input A1 Equilibr.time auto s
Temperature auto øC
(CASE CM<=7
DET_PH* Titration with NaOH
Reagent NaOH Sensor comb. glass
Concentr. 0.1 mol/L Meas. input A1
Dos. drive A1
CASE CM>7
DET_PH* Titration with HCl
Reagent HCl Sensor comb. glass
Concentr. 0.1 Mol/L Meas. input A1
Dos. drive A2
)CASE
END
In this case the sample is titrated with different reagents depending on the
pH of the sample.
It is possible to interlace CASE sequences in up to 3 levels.
Command Parameters Parameters
ДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДД
(CASE condition 1. level
... ... commands
CASE condition 1. level
... ... commands
(CASE condition 2. level
... ... commands 2. level
)CASE
... ... commands
CASE condition 1. level
... ... commands
)CASE
The previously
measured pH value
is evaluated here