6: Chronoamperometry Models 2450-EC, 2460-EC, and 2461-EC Potentiostats And Galvanostats
6-6 077110402/November 2016
To select the Current Range:
1. From the Measure Settings window, select Current Range.
2. Choose a range greater than the highest current you expect to measure.
The available current ranges for the 2450-EC and 2460-EC / 2461-EC are shown in the next figure.
Figure 112: Selecting the Current Range
Your instrument will integrate and average the current over the Sample Time duration. Longer sample
times will reduce the effect of noise on the measurement.
The Current measure Range constrains the currents that will flow through the device under test
(DUT). Make sure to choose a range higher than your expected maximum current. Setting the
current range also sets a current limit, which can be used to stop the test or otherwise protect your
DUT. Your potentiostat will limit the current to 105 percent of the selected range.
Now, you will specify the timing of consecutive measurements. This value is the time from the start of
one measurement to the beginning of the next measurement during a particular potential step. The
sample interval and sample time settings are related. The sample time can be no more than the
sample interval minus 5 ms (SI - 5 ms). Adjusting the sample interval may also change the sample
time setting automatically.
To specify the Sample Interval:
1. From the Measure Settings window, select Sample Interval.
2. Enter a value, then select OK.
Figure 113: Entering the Sample Interval
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