1Before using the instrument, please read the user manual carefully,specially pay attention to the warning. Please DO NOT ignore it, as it isvery important!Warning: Do not connect any load to the power supply before it's turned on.Likewise, make sure to disconnect the load before shutting down the powersupply. Damages to the power supply can happen if you do not follow this.Such damages are not under warranty.Warning: If you are running inductive load like magnetic coils, DC motors,stepper motors, etc., make sure to change the voltage/current slowly, andNEVER turn the power supply on or off with a inductive load connected!1.SummaryJS series single output dc power supply is a kind of switching powersupply with LED digital display. it has high precision, high efficiency, light,energy efficiency and environmental protection characteristics.Also it hasperfect protection functions, such as over voltage, over temperature andshort-circuit protection which can protect the testing load and power supplyform damage. It can be used both as constant voltage and constant current dcpower supply. What’s more, it’s constant voltage and constant currentoperation mode can be automatic conversion. It is widely used in LED testingand aging, motor manufacturing ,PCB manufacturing, battery, dc fan, etc . Itis the first choice for school, laboratory and production line.2Can make other output voltage and current that required2. Specifications2.1 Rated operating conditionInput voltage:110V/120V±10% 60HzWorking conditions: -10℃-40℃relative humidity :< 80%Storage conditions: -20℃-80℃relative humidity :< 80%2.2 Output technical parametersPower effect ion: CV≤0.05%+1mVCC≤0.05%+10mALoad effect ion: CV≤0.1%+5mVCC≤0.1%+10mARipples and noises:CV≤10mV(RJS)CC≤20mA(RJS)3. Panel’s characteristics and technical parameters3.1 front panel3(1) Digital ammeter: display the output current value, unit:A(2)Current coarse regulation knob: Coarsely regulate the value of outputcurrent.(3)Current fine regulation knob:Finely regulate the value of output current.(4)CC indicator: Constant current indicator light,When the power supply isunder the constant current operation conditions, the indicator light is on.(5)Power switch:used to turn on or turn off the power supply(6)“-” output terminal: Negative polarity output terminal(7)“GND” terminal: Ground terminal(8)“+” output terminal: Positive polarity output terminal4(9)CV indicator: Constant voltage indicator light. When the power supply isunder the constant voltage operation conditions, the indicator light is on.(10)Voltage coarse regulation knob: Coarsely regulate the value of outputvoltage(11)Voltage fine regulation knob:Finely regulate the value of output voltage(12)Voltage display: Used for displaying the voltage value,unit: V3.2 Back panel(13)Fuse: power fuse.before changing the fuse, need to turn off the powersupply and unplugged, then counterclockwise regulate the knob(13) to changeto fuse with the same specifications.(14)AC input voltage selection switch:AC110V/220 V input voltage selection5switch, it is has no switch in default state.(15)Power input socket : connect with power cord to swith on the power.(16)Cool Fan: Used for cooling. It is intelligent fan, automatically adjust thefan speed according to the state of load, can effectively reduce noise, prolongthe life of fan.Chapter 4 Detailed Explanations4.1 Preparation before energizing4.1.1 Please make sure the input voltage is AC198 -242V 50Hz, or 99V-121V60Hz .if there has input voltage selection switch , please make sure thevoltage you choose is the one you need , otherwise it will make damage to thepower supply.4.1.2 Make sure there is too much space for cooling, The two sides and backof the power supply should have 10cm space at least. the operatingtemperature should be less than 400C, humidity less then 80%. Please DONOT use it in the place where has acid and alkaline gases or excessive dust.Also please prevent the power supply from rain, sun exposure and StrenuousVibration.4.1.3 The copper diameter of the cable should be over than 0.5mm2,and it iscertainly to add a control switch for it, so that it can be used to cut off thepower completely when there is a need.4.1.4 before running the power supply, it is better to turn it on for preheating10 minutes. Then the testing will be more accurate.64.2 Operation4.2.1 Contact the power to the AC power with the plug and press the powerswitch (5), then the indicator C.C or C.V will be light and LED will hasdisplay.4.2.2 Constant voltage setting: Clockwise current regulate knobs(2) and (3) tothe maximum firstly, adjust voltage regulate knobs (10) and(11) to thenecessary value of voltage, then connect the load with output terminals(6) and(8).The power supply can be used for work now.In this time the CVindicator light (9)will be on. That is to say, the output voltage isconstant while the output current will be changed with the load.(the load current of power supply must be within the maximum output current。