ADCMT 6240B - Page 154

6240B DC Voltage Current Source/Monitor Operation Manual
5.2.6 Measurement Function
5-36
2. Measurement auto range for the DC source mode
The following example shows how the measurement range and the limiter range operate in the DC
source mode.
In this example, the current limit value is set to 200 mA. Current of 1 mA is measured and then 100
mA.
While the measurement auto range is enabled, the measurement is executed by changing the limit val-
ue to be larger than the full scale of the measurement range.
• For *1, the measurement result with 300 mA range is 1 mA.
The auto range changes the range to 30 mA, and the limit value changes to the maximum value,
32.19 mA for the 30 mA range.
• For *2, the measurement result with the 30 mA range is 1 mA.
The auto range changes the range, and the limit value changes to 3.219 mA.
• For *3, measuring with the 3 mA range outputs 1 mA measurement data.
• The output current is supposed to change to 100 mA at Point y. However, as the limit value is
3.219 mA, the output current is limited to 3.219 mA.
• For *5, the measurement result with the 3 mA range is 3.219 mA. This is over range (over 3.2
mA).
The auto range changes the range to the 30 mA range, and the limit value also changes to 32.19
mA.
• For *6, the measurement result with the 30 mA range is 32.19 mA. This is over range.
The auto range changes the range to the 300 mA range. However, the range is limited to the set-
ting compliance current 200 mA.
• For *7, the measurement result with the 300 mA range is 100 mA and it is output as output data.
Output current (changes according to the load)
100 mA
32.19 mA
3.219 mA
1 mA
Measurement start
x
Measurement
*1
Range
change
*2 *3 *4
y
*5 *6 *7
Time
Range
change
Range
change
Range
change
Limiter
200 mA
32.19 mA
3.219 mA
Output data *3 *4
Time
*7