303D
DC Regulated Voltage and Current Power
Supply Operation Instruction
1.
General Description
The DC power supply is high accuracy linear power supply. It is single channel constant voltage and current DC
voltage stabilizers with the features of low ripple noise, high stability, and high accuracy. It have the capability of
series connected and parallel connected to enhance the loading capacity of the power supply.
This is a stable voltage and current automatic transfer type of power supply with regulated uninterruptible output
voltage. It has characteristic of high precision and stable. The output voltage can be adjusted from zero up to more in
the range of rated voltage. Furthermore, the limited current protection also can be freely chosen. The stable output
current can be adjusted in the range of below table.
This constant voltage and current DC voltage stabilizers is suitable for scientific research, laboratory, teaching,
electronic product lines and communication industry as well as necessary equipments.
2. Basic parameter specifications and Panel features
2-1 Panel feature of power supply
(1) Current indication
(2) Voltage indication
(3) Current fine tuning
(4) Current coarse tuning
(5) Voltage fine tuning
(6) Voltage coarse tuning
(7) Constant current indicator
(8) Constant voltage indicator
(9) Power switch
(10) Power output “+” terminal
(11) Power output “-” terminal
(12) Power ground “GND” terminal
2-2 Nominal Operation Conditions
●
Input voltage: AC 220V ± 10%, 50Hz ± 2Hz
●
Output voltage: DC 0
～
30V
●
Output current: DC 0
～
3A
●
LED display accuracy:
Voltage: ± (1.0% + 1digit), Current: ± (2.0% + 2digits)
●
Protection: Current limited protection and short-circuit protection
●
Operation conditions: Temperature: 0
℃
~40
℃
, Relative Humidity: ≤90%
●
Storage conditions: Temperature: -20
℃
~60
℃
, Relative Humidity: ≤80%
●
Dimension: 275(L)×132(W)×157(H) mm
●
Working time: 8 hours continuously (temperature 20 ± 5
℃
)
