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4.3.
Setting test parameters
The component to be tested may be requested to be tested in different conditions. For this purpose, the
device has Test voltage, Limit resistance and Frequency values in different stages. Although the UCE-
DSO4200C curve tracer mode is dual channel, unlike the oscilloscope, test parameters are common to both
channels.
Test voltage setting:
The test voltage can be adjusted between 0.2V and 20V. It is adjusted at 200mV intervals up to 1V, after 1V
with 1V intervals. It is 24 steps in total. Rotate the Rotary-1 to adjust the voltage (counterclockwise to
increase, clockwise to decrease).
The test voltage and limit resistance also determine the test current. In order to limit the energy flow, the
maximum value of the test voltage is limited depending on the limit resistor.
Voltage limitation due to limit resistor;
•
2V (
*1V
) for 10R range,
•
7V (
*4V
) for 47R range,
•
10V (
*7V
) for 100R range,
•
18V (
*15V
) for 470R range,
•
20V for 1K, 4.7K and 10K ranges.
* Voltage limitation in dual mode
One of the biggest features of the device is undoubtedly the 200mV test voltage stage. Since active
components such as diodes and transistors are not triggered in the measurements made at this stage, only
the curve of the passive components is obtained in the measurement.
Figure 7 shows the impedance curves of the parallel connected diode and 47R resistor at 5V and 0.2V
stages. At 5V, a combination of resistor and diode characteristics is seen, while at 0.2V only the resistance
curve is seen.
Figure 7. Impedance curve of parallel connected diode and resistor at different stages
