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5.4.3. Setting the output voltage of output A
• Disconnect devices connected to output A (20 and 21).
• Switch the power supply on at the power switch (1). The operating display (24) lights up and the current and voltage
display appear on the display.
• Move the “AMPERE” current adjuster (8) to the centre position.
• The output voltage for output A can be set with the “VOLT” rotary control (4).
In normal mode, the device operates in constant voltage mode. This means that the power supply emits a
constant, preset output voltage. This operation is indicated with a green status display “CV” (5).
5.4.4. Setting the current limitation of output A
Limiting the output current is a protective mechanism to protect the consumer or connecting cables. Current limitation
can be preset without short-circuit at the output. The power supply supplies the maximum preset current.
• Disconnect devices connected to output A (20 and 21).
• Switch the power supply on at the power switch (1). The operating display (24) lights up and the current and voltage
display appear on the display.
• Turn the “AMPERE” rotary control (8) fully to the left.
• Press and hold the “C-LIMIT” button (22) during setting. The output is switched off automatically when the “C-LIMIT”
button is pressed. The voltage display then returns to 0.
• The max. current strength (current limitation) can be set with the “AMPERE” rotary control (8). After completing
setting, release the “C-LIMIT” button. The display shows the actual current strength again (with output 0.00 A
unloaded). The “CV” status display (5) lights up.
• Connect the consumer to output A (20 and 21) and switch it on. Pay attention to the polarity.
The “CC” LED display (7) lights up as soon as the set current level is exceeded and current limitation is active. Con-
stant current mode is active.
If the preset current strength is reached in normal mode, the power supply switches to current limitation
mode and reduces the voltage value. This operation is indicated with a red “CC” status display (7).
5.4.5. Setting the overvoltage protection (OVP) and resetting the device
Output A has adjustable overvoltage protection. This protective mechanism prevents the accidental destruction of
connected consumers due to an excessively high output voltage. Upon reaching the preset safety level, output A is
switched off immediately. Outputs B1 and B2 are not affected.
To set the safety level, proceed as follows
• With the laboratory power supply switched on, press and hold the “SHOW VALUE” button (18) during setting.
• The display (3) shows the current voltage level.
• Use an appropriate slotted screwdriver to set the desired max. voltage level on the “OVP ADJ.” (17) adjuster. If you
do not want a protective cut-off, turn the adjuster all the way to the right.
• Release the “SHOW VALUE” button (18). Overvoltage protection is activated.
