User Manual

After the PSU has been switched on, it is in the DC
mode. This is shown on the device with the DC symbol
in the upper left corner of the display (14 in Figure 5.1).
5.2 Setting-up procedures
The device is switched on with the power button (4 in
Figure 5.1). If you press this button again, the device will
turn off.
To charge the PSU, you must connect it with a micro-
USB cable to any high-quality USB-compatible source
with an admissible current of 0.5-2 A. A hidden red light-
emitting diode (2 in Figure 5.1) will light during charging.
The short-term flashing of this light-emitting diode is
normal.
The charging time of the device is 1-2 hours, with a
charger that supports a current of 2 A.
ATTENTION. Do not use the device as a power source
while it is charging!
5.3 DC mode
The voltage is set by rotating the regulator (2 in Figure
5.1). If no overload occurs, then the device is a voltage
source.
If the current exceeds 1 A, the device will switch to
overload mode. In overload mode, the measured
voltage and current (12 and 13 in Figure 5.1) will flash.
After the current has been reduced to 1 A, the device
will return to normal mode.
In overload mode, the voltage at the terminals will be
lower than the EMF set by the regulator (5 in Figure 5.1).
In this mode the battery is discharged noticeably faster;
in particular, the device may switch off, even though
there is still enough charge for operation in normal
mode. The overload mode is completely safe for the
device.
At low voltage values in the overload mode, protection
can be triggered to prevent the device from failing.
Before first use, the PSU must be charged.
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5.SETTING UP AND USING THE POWER SUPPLY UNIT