Metrohm viva 1.1 - Manual (Page 632)

5.5 Method run subwindow
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viva 1.1
Calculation: Potential step / Sweep rate
Sweep rate
Potential sweep rate for the sweep.
Condition 1: Sweep rate ≥ Potential step / 10 s
Condition 2: Sweep rate ≤ Potential step / 0.001 s
Input range 0.001 - 10.00 V/s (Increment: 0.001)
Default value 0.10 V/s
Preparation cycles
Number of cycles that are run through before the measuring cycles with-
out current measurement.
Input range 0 - 200 (Increment: 1)
Default value 1
Measuring cycles
Number of cycles with current measurement.
Input range 1 - 50
Default value 2
Sweep duration
Shows the duration of the sweep in s.
Calculation: (Preparation cycles + Measuring cycles) Ч [ 2 Ч (| 2nd
vertex potential − 1st vertex potential |) / Potential step ] × Poten-
tial step time
NOTE
The actual measurement of current takes place at the end of the
Potential step time. The measuring time is defined as follows:
￭ Potential step time < 0.080 s => measuring time = Potential
step time/4 s
￭ Potential step time > 0.080 s => measuring time = 0.02 s (at a
line frequency of 50 Hz)
￭ Potential step time > 0.080 s => measuring time = 0.01667 s (at a
line frequency of 60 Hz)