Power Supply Function
1. Press the composite keys [Shift]+[V-set] (Config) on the front panel to enter
the configuration menu.
2. Press the up/down key or rotate the knob to select Output Res and press
[Enter] to confirm.
3. Set the internal resistance value and press [Enter] to confirm.
4.4.3 CR Function in Sink Mode
This series of instruments supports CR testing in sink mode, and the sink cur-
rent capability of CR is controlled by the Is setting value in CC priority mode.
The usage of this function is as follows:
1. Press the composite keys [Shift]+[V-set] (Config) on the front panel to enter
the configuration menu.
2. Select Mode and press [Enter].
3. Select CC and press [Enter].
Enter the setting interface of the loop response speed.
4. Select High or Low, and press [Enter].
At this point, return to the Config menu settings interface.
5. Press the down arrow key to set the current rise and fall time.
6. Press the down arrow key to select Sink Res and press [Enter].
7. Select On and press [Enter].
8. Set the Sink Res value and press [Enter].
Setting range: 0~7500Ω. If set to 0, the function is equivalent to that
Sink Res is selected as OFF.
The following takes the setting of 10Ω as an example to introduce the actual
test results.
9. Set the voltage and current.
a. Press the [I-set] key on the front panel to set the output current value Is.
Take –5A as an example.
b. Press the [V-set] key on the front panel to set the voltage upper limit Vh=
20V, and press [V-set] again to set the voltage lower limit Vl=0V.
c. Set the DUT (power supply) to output 80V, 10A.
At this time, 10Ω in sink mode (according to the formula I=U/R, sink current
is 80÷10=8A), due to the limitation of Is=–5A in CC priority mode, the actual
sink current is 5A, and the instrument is working In CC mode. If Sink Res is
set to 20Ω, the sink current is 4A, which is within the limit of Is, so the instru-
ment works in CR mode at this time.
Copyright © Itech Electronic Co., Ltd.
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