Control Modes; Normal Mode; Preset Mode; Set Mode - Extech Instruments DPC42 User Manual

4. Control Modes
There are four control modes for the power supply: NORMAL, PRESET, SET, and REMOTE CONTROL
modes. The power supply is factory preset to Normal Mode with maximum current level CC.
4.1 Normal Mode
This is the factory default mode; the power supply output Voltage and Current are controlled by
the dual action gain knobs.
1. Push the knobs to toggle the coarse and fine tuning, notice the subtle changes in
brightness of the related LED.
2. Adjust the knobs to the desired values using coarse and then fine tuning.
3. To check the preset current level, turn the Current Knob lightly in any direction.
4. The display will resume its normal brightness after a few seconds to re‐affirm the
adjustment.
4.2 Preset Mode
1. There are three preset outputs P1/ P2/ P3 available.
2. Press the Preset button (1, 2, or 3) to enter the preset mode (the button's light will
switch ON).
3. The preset values are factory set as shown in the table below and are retained even after
the unit has been powered down.
4. The user can change these output settings using the voltage and current knobs.
4.3 Set Mode
Enter the Set Mode by pushing and holding the MENU button for 3 seconds. In the Set Mode the
user can adjust the ΔV/Δt value, access the remote Control mode, or perform a Factory Reset
recall function. Note: If no selection is made after 10 seconds the power supply defaults to its
prior settings.
4.3.1 Setting the ΔV/Δt value
a. Press and hold the MENU button for 3 seconds to access the Set Mode.
b. Turn the Voltage control knob until the panel meter displays "dudt Set" as shown below and
then press the Voltage control knob to enter the ΔV/Δt setting mode.
c. Adjust the Voltage and Current control knobs as desired to set the ΔV/Δt value. Further details
are provided in the dedicated section for ΔV/Δt mode later in this guide.
d. When finished, press the Voltage control knob to confirm and return to Set menu
e. Press the Menu key to exit the Set menu
f. To start the ΔV/Δt function, press the SHIFT button and then press the ΔV/Δt button to run,
g. To stop the ΔV/Δt function, press the SHIFT button and then press the ΔV/Δt button again.
Recall No.
P1
P2
P3
Output Voltage
5V
13.8V
40V
7
Output Current
Maximum
Maximum
Maximum
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