Metrohm 746 VA Trace Analyzer - Manual (Page 444)

5.7.3 Alphabetical instruction list
746 VA Trace Analyzer / 747 VA Stand
5-293
Parameter Range; Default value / Meaning
Meas.cycles 1...254; 4
Number of measurement cycles
Number of square wave voltage cycles with current measurement
which are performed for every voltage step.
The following condition holds for the definition of Meas.cycles :
32 ms
Meas.cycles < ––––––––
t.meas
Description With the SQWMODE measurement mode, a square wave alternating
voltage of small, constant amplitude and low frequency is superimposed
on a stepwise rising direct voltage ramp. Measurement of the current I as
a function of the voltage U involves several determinations of the
differences between the currents at each maximum and minimum
square wave voltage. The nature of the measurement is illustrated below
using the SMDE as an example.
Adjustable parameters:
SQWMODE
t.step
t.meas
U.ampl
Modul.freq.
Prep.cycles
Meas.cycles
SWEEP
U.start
U.end
U.step
t.drop
t
U
t
U.step
U.start
U.ampl
t.step
t.modul = 1/Modul.freq.
F (Hg)
Prep.
cycles
Meas.
cycles
t.meas (I
n1
) t.meas (I
n2
)
Area (Hg)