Metrohm 746 VA Trace Analyzer - Manual (Page 397)

5.7 Program instructions
746 VA Trace Analyzer / 747 VA Stand
5-246
MEAS Page: O, S Stand: M, A Abbreviation: M
Instructions t/s Main parameters Auxiliary parameters
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## .. MEAS ..... U.meas ........mV
Function Application of a constant voltage to the electrodes and measurement of
the current without measured value storage.
Application The MEAS instruction is primarily used together with the HMDE or RDE
for electrochemical enrichment in stripping voltammetry.
Parameter Range; Default value / Meaning
U.meas -3000...3000 mV; -
Measurement voltage
The voltage entered here is applied to the electrodes. This voltage
remains in force even after the line time has elapsed until a SWEEP
instruction follows or until it is switched off by
ØMEAS or END in the main
program on the "OP.SEQUENCE" page.
Description The MEAS instruction applies the voltage defined in the U.meas para-
meter to the electrode. At the same time, the current measurement is
started in accordance with the parameters defined in the measurement
mode. The duration of the measurement is defined with the line time.
During an ongoing measurement with MEAS , the current measured
values for voltage and current are displayed in the measurement window
on the "MONITORING" page (see section 5.5.1).
Comments • The electrode type must be defined before the MEAS instruction.
Admissible are DME , SMDE , HMDE or RDE .
• The measurement mode must be defined before the MEAS instruc-
tion. Admissible are DCTMODE , DPMODE , AC1MODE , AC2MODE , SQWMODE ,
CYCMODE or PSAMODE .
• If the measured values in measurement of the current should be
plotted, the
TSWEEP instruction must be used in place of the MEAS
instruction. However, this must not be in the same segment as the
measurement sweep.
• If the measurement voltage U.meas should not be switched off at the
end of the program, enter a suitable standby voltage U.standby in a
ØMEAS instruction.