5. Caution
5.1. This unit has excellent protection function, 5 V output has reliable
protection for current-limit and short. The adjustable output has
current-limit protection. As there is controlling circuit for regulating
transistor’s power loss in the circuit, when short-circuit occurs, the
power loss on large power transistors is not very high, it can’t cause
any damage to the unit. But there is still power loss when short-circuit,
in order to reduce aging and energy consumption, so this situation
should be find as soon as possible and turn off power, then exclude
the faults.
5.2. When operating is finished, put it in a dry place of good
ventilation, and keep it clean. If it is not in use for a long period, pull off
the power supply plug for storage.
5.3. For maintenance, input voltage must be cut off.
6. Operating method
Using the adjustable DC output
6.1. When the adjustable output is used as CV output, first should rotate
clockwise the CC adjustment (1) to maximum, then turn on power
switch (9), adjust CV adjustment (2) till output voltage reaches required
voltage value, at this time, the CC state indicator (17) goes out and the
CV state indicator (18) lights on.
6.2. Used as CC output, after turning on power switch (9), first rotate
clockwise the CV adjustment (2) and to maximum, while rotating
counter clockwise the CC adjustment (1) to minimum, connect the
required load, again adjust clockwise adjustment (1) till output current
reaches the required current value. At this time, the CV state indicator
(18) goes out and the CC state indicator (17) lights on.
6.3. Used as the CV output, in general the CC adjustment (2) and (17)
should be set to maximum, but for this unit, the current-limiting
protection point can also be set arbitrarily.
Setting procedure: turn on power, rotate counter-clockwise the CC
adjustment (1) to minimum, then make the positive and negative
output terminal in short connection and rotate clockwise the CC
adjustment (1) till output current equals to the required current-limiting
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