User`s Manual V3 (DIGITAL/RS232) - DSC
Contents
1. 5 4 Constant Current Operation NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP D until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load Press the POWER button to turn on the DP D make sure the output is OFF Press the PRESET button to set the max voltage and current Recheck if the output is OFF Connect to load Press OUTPUT button to turn on output The power supply outputs current as per setting value The output voltage value changes according to changes of load consumption Should the output voltage reach the max voltage value set before the device automatically switches to C V mode and adjusts the current ae nae oe aera 5 5 Remote Sensing Operation The power supply is designed with remote sensing terminals which can read voltage th the load accurately Refer to below figure on how to connect the load to remote sensing terminals Set the switch on the back panel to EXT when using remote sensing function or set to INT when not using this option Internal i Switch oan External WARNING If using a switch between the load and the power supply refer to below figure for connection and make sure the remote sensing wires and the load connecting wire can be switched on or off simultaneously Otherwise it will cause damage to the power supply 6 Maintenance2. and Current PRESET NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP D until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load Seo ay Press the POWER button to turn on the power supply Make sure the OUTPUT is OFF Press PRESET button the display meter displays the preset voltage and current Tune CURRENT and VOLTGE knob to set values Press the PRESET button to save the values Conned to load Press OUTPUT button to turn on output Press the PRESET button to activate the values saved before 5 3 CV Constant Voltage Operation NOTE Connect the load always before turning on the output but after turning on the power supply Always wait after switching on the DP D until the switch on pulse is discharged See voltage indicator before making any adjustments or connect a load 1 Press the POWER button to turn on the power supply and make sure the output is OFF Press the PRESET button to set the voltage and max current Recheck if the output is OFF Connect to load Press OUTPUT button to turn on output The power supply outputs voltage as per setting value The output current value changes according to changes of load consumption Should the output current reach the max current vailue set before the device automatically switches to C C mode and adjusts the voltage O OTEO PO
3. the power supply it can cause voltage drop or instability to the output A basic solution is to connect a 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 additionaly connect a capacitor with large capacity A reference for choosing the capacity of a capacitor is 1000uF capacity to 1A current Pulse Load 2 5 Application of Load with Reverse Polarity Current Note Only needed for DP D devices without Reverse Current protection Optional lf 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 a electrolytic capacitor in parallel to the load DC Power Supply OUT Motor Load 2 6 Switch lf 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 Hee Ajddns Jamog 50 3 Installation and Connection 1 The power supply will generate heat during operation Before operation the power supply should be pla
4. DSC Electronics Professional laboratory equipment DP D Series AC DC Laboratory Power Supply User s Manual V3 Version 10 07 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 instrument s 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 particular
5. The following instructions are for 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 To clean 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 Do not use abrasive cleaners on the instrument
6. V indicator 5 Output indicator _ 6 OVled 7 OlLled ia 11 Preset button 12 Output ON OFF 13 Power switch 14 PR indicator 15 FI Indicator 5 Operation Instructions 5 1 Device Check NOTE The device check should only be performed for troubleshooting purposes SS oe 2 aa NS 10 11 DO NOT connect any load to the power supply during the device check Tune the CURRENT knob clockwise to the maximum and the VOLTAGE knob anti clockwise to OV Use the POWER switch to turn on the power supply Press OUTPUT ON button to get the power supply in working mode C V indicator lights on while C C indicator lights off Tune the VOLTAGE knob clockwise to increase the output voltage from OV to the max rated value The voltmeter will display max voltage value Press OUTPUT button again to turn off the output Recheck if the output is OFF Tune the CURRENT knob anti clockwise to the minimum while tune the VOLTAGE knob clockwise to the maximum Connect a wire between terminals OUT and OUT The output wire must be able to sustain max rated current of the power supply for 10 seconds Press OUTPUT button to turn on the power supply once again C C indicator will switch on while C V indicator will switch off Tune the CURRENT knob clockwise the output current will start from OA to the max rated value Press OUTPUT button again to turn off the output Then take off all connecting wires 5 2 Voltage
7. 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 or loss of life A N CAUTION Identifies conditions or practices that could result in CAUTION A WARNING Identifies conditions or practices that could result in injury WARNING damage to the instrument or to other properties A N DANGER High voltage ATTENTION Refer to the manual Protective conductor terminal L Earth Ground terminal 1 2 Safety Guidelines General e The power supply can be used only by qualified personnel e 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 e Before turning on the power supply make sure the chassis are properly grounded Removing grounding or improper GND terminal connection may cause elect
8. ced in an environment with good ventilation Avoid places of great heat high humidity amp temperature or heavy dust 2 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 3 The magnetic field generated from the power supply can have influence to nearby devices Please place devices which are sensitive to magnetic field away from the power device 4 Choose suitable AC input wire according to the rated power of the power supply 5 Choose suitable DC output wire according to rated power of the power supply to connect the load 4 Panel Introduction P j Professional laboratory equipment an si I W Q m i g 20 J W Description Voltage Display the output voltage Current C C indicator C V indicator Output indicator OV Led OL Led OT Led Current set If the power supply is in CC mode or current limit mode tune this Knob to set the current value If the power supply is in CV mode tune this knob to set the over current limit value Voltage set lf the power supply is in CV mode tune this knob to set the output voltage value If the power supply is in CC mode tune this knob to set the over voltage limit value Preset button Output ON OFF Power switch PR indicator FI Indicator 10 a 15 No Name 1 Voltage 2 Current 3 C C indicator 4 C
9. ect 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 of Inductive Load Note Only needed for DP D devices without Reverse Current protection Optional lf 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 a R C filter circuit which will significantly decrease generation of the impulse DC Power Supply OUT Inductive Load 2 3 Application of Battery Load Note Only needed for DP D devices without Reverse Current protection Optional lf using the DP D for charging a battery it is recommended to connect a diode between the power supply and the battery OUT DC Power Supply Battery 2 4 Application of Pulse Load lf the peak current of a pulse load such as motor bulb DC DC or DC AC converter module is nearly the rated current of
10. rical shock e Do not use this power supply on life support system or other systems with similar requirements e Do not use this power supply near water e Do not operate or touch this power supply with wet hands e Do not open the casing of the power supply when it is connected to AC mains e 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 e Do not use the power supply in an atmosphere which contains sulfuric acid mist or other substances which cause corrosion to metal e 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 e Install the power supply in a place free from vibration e 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 e 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 a inductive load connected WARNING NOTE Only important for DP D without reverse current protection option Power supply AC input voltage refer to input label on rear panel Connect the protective grounding conductor of the AC STATE power cord to an ear
11. th ground to avoid electrical shock Fuse The DP D Series are Protected with an automatic fuse To reset the fuse disconnect AC power for 5 WARNING minutes a Make sure the cause of fuse blowout is fixed before fuse reset replacements 2 General Knowledge The DP D 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 untill 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 Note Only needed for DP D devices without Reverse Current protection Optional 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 conn
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