To prevent scratches,the display screen has a protective film,which may not be obvious.If you find scratches on the screen, you can look at it carefully and you will find that there is a protective film on the screen.
Doesn't do primary function-no power out. Because our power supply uses better capacitance, there will be a little delay display effect after the power is cut off. This is normal, and it will take a few seconds to turn off the screen.Fan of the power supply will automatically turn on when temperatures reach 50 ℃ .We have limit current protection, thermal protection, voltage overload protection, short-circuit protection.
When you are unable to adjust the current, it may be because you do not have access to the electronic load. You can turn on an electronic load or form a short connection and then adjust it. You can also contact us.This dc power supply for phone repair,Lab use,battery charge,plating，etc.
It have complete operating protection function,Double potentiometer more precise adjustment.
If you find that the power supply does not work or the screen does not display after receiving the goods, please contact us immediately and If you have anything you don't understand in the process of use, please contact us and we will answer it for you.

INTRODUCTION:
The series of switching power supplies for measuring instrument have ruled out the inconvenience of bigvolume and heavyweight of a traditional power supply possess.Four adjustment buttons,The output voltage and current respectively is controlled by two variable resistors with coarse and fine regulation for morehandy and precise adjustment.
1.Have complete operating protection function.over temperature protection,overload protection,short circuit protection.
2.Small size, low ripple,light weight and high power density,Highly efficient.
3.Voltage stabilization, current limiting, simple operation.
4.Constant pressure and constant current switch automatically.
5.Three LED display of voltage, current and power, high precision.
6.Temperature controlled fan heat dissipation, low noise, long life.
7.Four potentiometer more precise adjustment.
8.Dual voltage input and convenient choice.
9.Output Voltage ranges from 0 to 30V/60V/120V rating voltage with continuous adjustment .
10.Output current ranges from 0 to 10A/5A/3A rating current with continuous adjustment.

More Parameters
Input voltage:AC 110V/220V 50/60Hz
Output voltage:0 ~ 30V /60V/120V
Output current:0 ~ 10A /5A/3A
Voltage resolution:100mV
Current resolution:10mA
Voltage regulation : Line regulation<5mV. Load regulation<5mV.
Recovery time<500us(50% Load change, minimum load 0.5A)
Ripple & Noise<5m Vrms, 100m Vp-p
Temperature coefficient<100p pm/C.
Current regulation line regulation<3mA. load regulation<3mA.
Indicator Meter
Voltage display precision: +-(0.5% of rdg + 2 digits).
Current display precision: +-(0.5% of rdg + 2 digits).
Operation Temperature & Humidity : 0 ~ 40 C, RH<80%.
Storage Temperature & Humidity : -10 ~ 70 C, RH<70%.
Package Dimensions ‏ : ‎ 12.48 x 8.23 x 5.08 inches

Your package include
1 * DC Power Supply
1 * Power Cable
1 * Output Line(Gift)
1 * Instruction Book