DP-S Series REV:2 AC/DC Laboratory Power Supply User`s Manual
Contents
1. Switch on the output by pressing Output ON OFF 10 Tune the over voltage setting Knob 15 and current knob 4 clockwise to the maximum Tune voltage knob 13 14 to the necessary value of OVP Tune the over voltage knob 15 anti clockwise until the OVP indicator 11 lights on Now the power supply shuts down output Switch OFF the power supply 7 The OVP is now set NOTE The output voltage should be less than the OVP setting value Otherwise the power supply is in OVP mode and the output will always be shut down If no specific OVP needed leave the setting at max Resetting the OVP 1 2 If you have set an OVP value it can be canceled as per the following steps Tune the over voltage setting knob 15 clockwise to the maximum 5 2 Constant Voltage Setting NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP S until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load CONDOR UNBE Connect the power supply to local power source Press the power switch 7 to turn on the power supply Switch on the output by pressing Output ON OFF button 10 Set the Current Knobs 4 5 clockwise to the maximum Tune knobs 13 14 to the necessary voltage value Switch off the output by pressing Output ON OFF button 10 Connect the load to output terminals 12. DC Power Supply OUT Pulse Load 2 5 Application of Load with Reverse Polarity Current If the power supply is connected to a load that can cause reverse polarity current to the power supply output the output voltage will become unstable A solution is to connect a diode in serial between the output terminal and the load At the same time connect a discharge resistor in parallel to the load If the reverse polarity current is a peak surge connect an electrolytic capacitor in parallel to the load OUT DC Power Supply OUT Motor Load 2 6 Switch If a mechanic switch is used to connect or disconnect the power supply output electric discharge will occur during switching This may cause instability to the output To prevent such situations connect a RC circuit to the switch contact point OO PA HEA e ddng samog 50 Installation and Connection The power supply will generate heat during operation Before operation the power supply should be placed in an environment with good ventilation Avoid places of great heat high humidity amp temperature or heavy dust Allows sufficient ventilation space at the front and rear panels A ventilation distance between the power supply and other equipments should be at least 300mm Avoid overlapping with other equipments The magnetic field generated from the power supply can have influence to nearby devices Please place devices w
3. 8 19 Switch on the output 10 The power supply can be used for work now The CV indicator 12 will light on which means the output voltage is constant while the output current changes according to load capacity 5 3 Current limit NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP S until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load Connect the power supply to local power source Press the power switch 7 to turn on the power supply Switch on the output by pressing Output ON 10 Tune voltage knob 13 to 5V Tune current knob 4 5 to the minimum Switch off the output by pressing Output ON OFF 10 Use a test lead to short the two main terminals 18 19 Switch on the output by pressing Output ON 10 Tune current knobs 13 14 to the necessary current value 10 Switch off the output by pressing Output OFF 10 11 Disconnect the test lead 12 The Current limit is now set OONOOBRWNE 5 4 Constant Current Mode NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP S until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load Connect the power supply to local power source Press the power switch 7 to t
4. DSC Electronics Professional laboratory equipment DP S Series REV 2 AC DC Laboratory Power Supply User s Manual V3 2 Version 03 11 2015 1 Use of Operation Manual Please read through and understand this Operation Manual before operating the product After reading always keep the manual nearby so that you may refer to it as needed When moving the product to another location be sure to bring the manual as well Calibration notification We notify that the instruments included in this manual are in compliance with the features and specifications as stated in this manual Before shipment the instrument has been calibrated in factory The calibration procedures and standards are compliant to the national regulations and standards for electronic calibration Warranty We guarantee that the instrument has been passed strict quality check We warrant our instruments mainframe and accessories in materials within the warranty period of one year We guarantee the free spare parts for products which are approved defective in this period To get repair service please contact with your nearest sales and service office We do not provide any other warranty items except the one being provided by this summary and the warranty statement The warranty items include but not being subjected to the hinted guarantee items related to tradable characteristics and any particular purpose We will not take any responsibility in cases regarding to indirect p
5. articular and ensuing damage such as modifications to the circuit and functions by the users repairing or component replacement by the users or damage during transportation For product improvement the specifications are subject to change without prior notice 1 1 Safety Instructions This chapter contains important safety instructions that you must follow when operating the instrument and when keeping it in storage Read the following before any operation to insure your safety and to keep the best condition for the instrument Safety Symbols The following safety symbols may appear in this manual or on the instrument Identifies conditions or practices that could result in injury WARNING WARNING or loss of life Identifies conditions or practices that could result in CAUTION CAUTION damage to the instrument or to other properties DANGER High voltage ATTENTION Refer to the manual Protective conductor terminal Earth Ground terminal IWS PS gt gt 1 2 Safety Guidelines General WARNING Power supply WARNING Fuse AN nne The power supply can be used only by qualified personnel Do not connect any load to the power supply before it s turned on Make sure to disconnect the load before shutting down the power supply Not following this instruction may cause damages to the power supply which are not under warranty Before turning on the power supply make sure the chassis are properly grounded Removing ground
6. hich are sensitive to magnetic field away from the power device Choose suitable AC input wire according to the rated power of the power supply Choose suitable DC output wire according to rated power of the power supply to connect the load Devices of the DP S series are not designed for 100 duty cycle and have to cool down every 25 35 minutes for 15 minutes if the load is over 4kW If the OT led switches on the device is in CoolDown mode Switch off the output and wait 15 minutes 4 Panel Introduction n nso tees Name label Original DSC Electronics Logo Displays the output current 3 OTP indicator The indicator lights on if the Over Temperature Protection is activated or the device is in CoolDown mode Switch off the output and let the device cool down for 15 minutes Coarse regulation of the output current Current fine set Fine regulation of the output current Current operation mode 8 Connection Optional O Z SSS O 9 Connection2 Optiona Z SSS O voltage operation mode Fine regulation of output voltage i set it with a small screwdriver if needed 5 Operation Instructions 5 1 Over Voltage Protection NOTE The OVP Setting shuts down the output if the preset OVP voltage value is reached This is useful for general protection of the load Setting the OVP KR WN FP gl Connect the power supply to local power source Press the power switch 7 to turn on the power supply
7. ing or improper GND terminal connection may cause electrical shock Do not use this power supply on life support system or other systems with similar requirements Do not use this power supply near water Do not operate or touch this power supply with wet hands Do not open the casing of the power supply when it is connected to AC mains The max output voltage of the power supply may be over 60VDC never touch the metal contact parts of the output terminals while the output is ON Do not use the power supply in an atmosphere which contains sulfuric acid mist or other substances which cause corrosion to metal Do not use the power supply in a dusty place ora highly humid place as such will cause power supply reliability degradation and instrument failures Install the power supply in a place free from vibration Install the power supply in a place with ambient temperature in range of 10 70 degree celsius Note that the power supply operation may become unstable if it is operated in an ambient temperature exceeding the range of 0 40 degree Celsius If you are running inductive load like magnetic coils DC motors etc make sure to change the voltage current slowly and NEVER turn the power supply on or off with an inductive load connected AC input voltage refer to input label on rear panel Connect the protective grounding conductor of the AC power cord to an earth ground to avoid electrical shock The DP S series are protected w
8. ith an automatic fuse which has to be reset by DSC Electronics Please contact our support 2 General Knowledge The DP S power supply can supply voltage and current in constant voltage CV or constant current CC mode within the rated output range This allows continuous switching from constant current to constant voltage modes in response to the load change In CV mode a regulated output voltage is provided The output voltage remains constant as the load increases while the output current changes in response to the load changes until the preset current limit point is reached At that point the output current becomes constant and the output voltage drops in proportion to the further increases in load The pint is indicated by the front panel LED indicators Similarly in CC mode switching from CC to CV mode automatically occurs from a decrease of the load A regulated output current is provided The output current remains constant as the load decreases while the output voltage changes in response to the load changes 2 1 Application of Capacitive Load If the power supply is connected to a big capacitive load it always causes interferences to the output voltage in a power supply To solve this problem connect a power resistor in parallel to the output terminals of the power supply At the same time connect a diode in serial between output terminals and the load OUT DC Power Supply Capacitive Load 2 2 Application
9. of Inductive Load If an inductive load is connected to the power supply it will cause a reverse polarity induction electric impulse when the power supply is turned on or off or when changing the output voltage polarity The pulse caused by an inductive load will also affect the power supply especially when the pulse has the same polarity with the output of power supply To avoid effect or damage to the power supply connect a diode in serial between the output terminals of power supply and the load At the same time connect a power resistor and a capacitor in parallel to the load to make an R C filter circuit which will significantly decrease generation of the impulse OUT DC Power Supply Inductive Load 2 3 Application of Battery Load If using the DP S for charging a battery it is recommended to connect a diode between the power supply and the battery DC Power Supply Battery 2 4 Application of Pulse Load If the peak current of a pulse load such as motor bulb DC DC or DC AC converter module is nearly the rated current of the power supply it can cause voltage drop or instability to the output A basic solution is to connect an inductor in serial between the power supply and the load If the pulse circuit has a small pulse width or low peak current another solution is to additionally connect a capacitor with large capacity A reference for choosing the capacity of a capacitor is 1000uF capacity to 1A current
10. or use by qualified personnel only To avoid electrical shock do not perform any servicing other than contained in the operating instructions unless you are qualified to do so 1 Inspect the instrument at regular intervals so that it maintains its initial performance for a long time 2 Check the input power cord for damage Check the terminal screws and binding posts for loosening 3 Remove dust from the inside of the casing and ventilation holes of the cover by using compressed air or a vacuum cleaner 6 1 Cleaning 1 Before cleaning disconnect the AC mains 2 Toclean the power supply use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner directly onto the instrument since it may leak into the case and cause damage 3 Do not use chemicals containing benzene benzene toluene xylene acetone or similar solvents 4 Donot use abrasive cleaners on the instrument
11. urn on the power supply Switch on the output by pressing Output ON 10 Tune the over voltage setting knob 15 clockwise to the maximum Tune voltage knob 13 to the desired max value Tune current knob 4 5 to the minimum Switch off the output by pressing Output ON OFF 10 Use a test lead to short the two main terminals 18 19 Switch on the output by pressing Output ON 10 10 Tune current knobs 4 5 to the necessary current value 11 Switch off the output by pressing Output ON OFF 10 12 Connect the load to output terminals 18 19 13 Switch on the output by pressing Output ON 10 OONOOBRWNE The CC indicator 6 will go on which means the output current is constant while the output voltage changes according to load capacity If the CC indicator 6 is not on increase the load capacity change the constant current value or raise the max voltage to reach a constant current 5 5 External analog Voltage and Current control Optional The Device can be equipped with a 0 5V external analog control for output Voltage Connection2 and Current Connection 1 Voltage and Current Control To control the output Voltage or Current of the DP S please connect the control Signal 0 5V to the SIG and the GND connections Use the V connection as a power supply for external control circuits 5 1V 0 5W Max Now switch the device to EXT mode 6 Maintenance The following instructions are f
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