INSTRUCTION MANUAL Model LS1330 Triple
Contents
1. Terminal Negative polarity output terminal for the MASTER supply Also serves as the negative polarity terminal for parallel tracking mode In series tracking operation this terminal is internally tied to the positive terminal of the SLAVE supply 11 3 4 Voltage Display Displays the voltage of the MASTER Supply Current Display Displays the voltage of the MASTER Supply SLAVE Supply Controls and Indicators 11 C V Constant Voltage Indicator Green LED lights when the SLAVE supply is in the Constant Voltage mode The Power Supply regulates the output voltage at the value set by the SLAVE VOLTAGE controls 12 C C Constant Current PARallel Indicator 6 7 18 19 20 1 2 Red LED lights when the SLAVE supply is in the Constant Current mode The Power Supply regulates the output current at the value set by the CURRENT control when in the series tracking or independent mode Also lights when the PARALLEL tracking mode is selected VOLTAGE Control Adjustment of the output voltage of the SLAVE supply when in INDEPendant mode This knob is disabled in PARALLEL and SERIES tracking mode CURRENT Control Adjusts current limit of SLAVE supply in constant voltage mode Adjusts current value of SLAVE supply in constant current mode Terminal Positive polarity output terminal for the SLAVE supply In series tracking operation this terminal is connected to the negative terminal2. by the front panel LED indicators The crossover point is reached when the CV indicator goes off and the CC indicator comes on Similarly crossover from the constant current to the constant voltage mode automatically occurs from a decrease in load A good example of this would be seen when charging a 12 volt battery Initially the open circuit voltage of the power supply may be preset for 13 8 volts A low battery will place a heavy load on the supply and it will operate in the constant current mode which may be adjusted for a 1 amp charging rate As the battery becomes charged and its voltage approaches 13 8 volts its load decreases to the point where it no longer demands the full 1 amp charging rate This is the crossover point where the power supply goes into the constant voltage mode Constant Current Vo MAX lt Range gt lo MAX Output Voltage Crossover Point Constant Voltage Range Output Current 5 5 Series Tracking Operation When the series tracking mode of operation is selected the positive red terminal of the SLAVE supply output is internally connected to the negative black terminal of the MASTER supply This allows the power supply to be used as a single 0 60 volt power supply simply by using the negative black terminal of the SLAVE supply and the positive red terminal of the MASTER supply In the series tracking mode the maximum output voltage of both the MASTER and SLAVE supplies can be simultaneously v
3. current red or output voltage green of the two main supplies simultaneously x Series tracking and parallel mode operation CV CC operation LED indication for CV Green CC Red mode Excellent regulation and low ripple characteristics Overload and reverse polarity protection 2 SPECIFICATIONS Output Voltage 0 30V Master and Slave Supplies 5V Fixed Output Output Current 0 3A Master and Slave Supplies 0 3A Fixed Output Line Regulation lt 0 01 3mV eb D Load 3 Regulation lt 0 01 3mV lt rating current 8 Ripple amp Noise lt 1mVrms 5Hz to 1MHz current lt 3A D Temperature S 8 Coefficient SRC PRE lt 100uS 50 load change minimum load 0 5A Recovery Time Line A ss E Regulation SOANE OMA o 6S Load o S Regulation Soa ramy O i G Ripple amp lt 3mA RMS Noise ra gt 3 digit 0 56 LED display z Red LEDs for Voltage Green LEDs for Current wn a Accuracy lt 0 5 of reading 2 digits Spee Tracking series accuracy lt 0 5 10 mV of master channel es Load a 8 2 Regulation Unspecified a 5 i L O ag amp lt 1mVrms current lt 3A oise General Power AC 110V 220V 10 selectable 50 60Hz 470W Requirements Operating Operation 0 to 40 C 75 R H Environment Storage 15 to 70 C 85 R H Accesso
4. output 5V 3A and two variable outputs 0 30V 0 3A The variable outputs can work independently or in series tracking or parallel mode Four large panel mounted LED meter displays can monitor both the output current or and output voltage of each supply The two main channels can be operated independently or in one of two tracking modes In the series tracking mode the master and slave supplies are connected in series providing a single output of 0 60V at up to 3A In the parallel tracking mode the two supplies are connected together in parallel providing a single 0 30 V output at up to 6A The voltage level of the 2 main supplies can be adjusted very precisely with the digital encoder Both adjustable supplies support constant voltage or constant current applications The crossover from constant voltage to constant current modes is smooth and automatic LED s indicate the CV constant voltage or CC constant current mode of operation In constant voltage applications a current limit may be preset When load variations cause the current to reach the preset limit the unit then regulates output current rather than output voltage The fixed supply is ideal for powering digital logic circuitry The 0 3 amp capacity allows the supply to be used for large circuits Built in overload protection automatically limits the current output to a maximum of 3 amps An indicator lights flashes when the supply is overloaded The output is
5. supply is in the INDEPendent operating mode 2 3 Ne Turn off the power supply and the equipment to be powered during hook up Ne Connect the positive polarity of the device being powered to the red terminal of the power supply Connect the negative polarity of the device being powered to the black terminal of the power supply Note If the negative polarity of the equipment or circuit being powered is also the chassis or common it may be grounded to earth by strapping the black terminal to the green GND terminal Similarly the positive polarity can be grounded by strapping the red terminal to the green GND terminal If the chassis or common of the equipment being powered is separate from both the positive and negative polarity power inputs don t reference the power supply s GND terminal to either the or terminal 4 Make sure that the hook up leads offer sufficient current capability and low resistance between the power supply and the circuits being powered 5 3 Typical Constant Voltage Operation 1 Before connecting the device to be powered to the power supply determine the maximum safe load current for the device to be powered and set the current limit value according to the Setting Current Limit procedure below 2 Set the VOLTAGE control to a minimum fully counterclockwise 14 3 Turn off power supply and connect it to the device to be powered see Hook Up procedure in this se
6. 1 5 4 Typical Constant Current Operation cccceceesseeseeeeceeeeeeeeeeeeeeeeneees 11 5 5 Series Tracking Operation cccesccesccesesseeesecseeeeeeseeseceeeeeeeeneeeseeneees 11 5 6 Parallel Tracking Operation cecccesecsseesseeseeeeeeeeeeseceseeeeeneeeeensees 11 6 MaiNteMaNnce ccsccsscsssccscesscsssccssscssscsssssssscssscsssssssccsssssoesenes 16 6 1 Fuse replacement 3 0 04 c565 alec ets Hee eee he ao hate SER 16 6 2 Line Voltage Selection ceini iieri iiid 16 7 Service Information sccsccscssscssssccsscssccssscssscssssssssnssssesesssesess 17 7 1 Warranty and Non Warranty Service ccccceccseesceeseeeseeeeceteeeeesseenees 17 7 2 Limited 90 day Warranty c cccccesccesecesecsseceeeeseeeseeeseeeeeseeeneeeereeeens 17 8 APP x scsisccssodeescedavssessdesssdvedocasecanesncssedesdsensedeanasteseseebeccdasocessuesees 18 8 CE Declaration enpreni eines E ates ila hese E 18 SAFETY TERMS AND SYMBOLS These terms and symbols may appear on the product or in the user manual WARNING Warning statements identify condition or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Protective Ground Earth Terminal 1 PRODUCT INTRODUCTION 1 1 Description The Lodestar Electronics Model LS1330 is a Triple Output Regulated DC Power Supply that provides one fixed
7. LODESTAR X Electronics A Subsidiary of B amp K Precision Corp INSTRUCTION MANUAL Model LS1330 Triple Output DC Power Supply GENERAL SAFETY SUMMARY Review the following safety precautions to avoid injury and prevent damage to this product and any product connected to it To avoid potential hazards use this product only as specified To avoid fire or personal injury Use proper power cord Use only the power cord supplied with this product or a power cord that is specified for the country of use Ground the product When using the supplied three prong power cord this product is grounded through the grounding connector of the power cord To avoid electrical shock the grounding connector must be connected to earth ground Before making connections to the input or output of the terminals of the product ensure the product is properly grounded Observe all terminal ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Avoid exposed circuitry Do not touch exposed connections and components when power is present Do not operate without covers Do not operate this product with covers and panels removed Do not operate in an explosive atmosphere Do not operate in wet or damp conditions Use an insulated floor material or a large insulated floor mat to stand on and a
8. aried with one control In this mode the output voltage across the two supplies is actually the sum of the voltage values of the MASTER and the SLAVE The actual output voltage is the sum of the 2 voltages displayed the actual output current value can read from the MASTER Display 1 Set the power supplies to the SERIES tracking mode by engaging the left MODE button 2 Na Set the SLAVE Voltage and Current controls to the fully clockwise position The maximum current is set using the MASTER CURRENT control Follow the instructions for Setting Current Limit in section 5 2 Adjust the output voltage to the desired level using the MASTER VOLTAGE controls 3 wm 4 5 Nan Turn off the power supply and the equipment to be powered during hook up ew Connect the positive polarity of the device being powered to the red terminal of the MASTER power supply Connect the negative polarity of the device being powered to the black terminal of the SLAVE power supply Turn on the Power Supply Note If the negative polarity of the equipment or circuit being powered is also the chassis or common it may be grounded to earth by strapping the black terminal of the SLAVE supply to the green GND terminal of the SLAVE supply Similarly the positive polarity can be grounded by strapping the red terminal of the MASTER supply to the green terminal of the MASTER supply If one of the supplied ground straps is to be used
9. ction 4 Turn on POWER switch The CV indicator should light 5 Increase the VOLTAGE setting until the LED display reads the desired value If the load current exceeds the preset current limit the CV indicator will go off and the CC indicator will light In this case the power supply automatically switches to the constant current mode and further rotation of the VOLTAGE control will not increase the output voltage Setting Current Limit 1 Determine the maximum safe current for the device to be powered 2 Temporarily short the and terminals of the power supply together with a test lead 3 Natl Rotate the VOLTAGE control away from zero sufficiently for the C C indicator to light 4 xw Adjust the CURRENT control for the desired current limit Read the current value on the LED display 5 wm Remove the short between the and terminals and hook up for constant voltage operation The current limit overload protection has now been preset Do not change the CURRENT control setting after this step 5 4 Typical Constant Current Operation 1 Before connecting the device to be powered to the power supply determine the maximum safe voltage to be applied and set the VOLTAGE controls to obtain that voltage reading on the LED display 2 Determine the desired constant current value Set the CURRENT control to minimum fully counterclockwise Na 3 wm Turn off the power supply and connect it
10. er to the unit make sure that the line voltage setting is correct and the ventilation holes are not blocked Ensure that the ventilation fan is working well it should turn on at power on condition 4 PANEL INTRODUCTION 4 1 Front panel a wa Aaaa WMO H 23 POWER Switch Turns power on and off 13 amp 14 TRACKING Mode Switches Two pushbutton switches that select INDEPendent mode SERIES tracking mode or PARALLEL tracking mode a With both switches disengaged out the unit is in independent mode and both power supplies MASTER and SLAVE operate completely independent from one another b To enable series mode push the left button and disengage the right button In this mode maximum voltage of both supplies is set using the MASTER voltage controls In this mode of operation the positive terminal of the MASTER supply is internally connected to the negative terminal of the SLAVE supply This allows the two supplies to be used as one 0 60 volt supply c With both buttons are engaged the unit operates in tracking parallel mode Now MASTER and SLAVE supplies are wired together in parallel and both the 10 maximum current and voltage are set using the MASTER controls The 2 supplies combined can now deliver 0 to 30 volts and up to 6A 22 Terminal 21 27 Negative polarity output terminal for 5V 3A fixed output supply Terminal Positive polarity output terminal for 5V 3A fixed output supp
11. in the rear panel Replace the required fuses according to this table Line voltage Range Fuse AC 220V 198V to 242V T 3A 250V AC 110V 100V to 120V T 6A 250V WARNING For continued fire protection replace fuse only with 250V fuse of the specified type and rating and disconnect power cord before replacing fuse 6 2 Line Voltage Selection To select the desired line voltage simply set the slide switch on the rear panel to the appropriate voltage Before you do so unplug the unit and make sure the proper fuse is installed 20 7 SERVICE INFORMATION 7 1 Warranty and Non Warranty Service Please contact your local distributor for warranty and service instructions 7 2 Limited 90 day Warranty The company warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials for a period of 90 days from date of purchase from your local distributor The company will without charge repair or replace at its option defective product or component parts Please contact your local distributor for instructions Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs The warranty is void if the serial number is altered defaced or removed The company shall not be liable for any consequential damages including without limitation damages resulting from lo
12. isolated from chassis and earth ground which permits full flexibility of connections When needed the or polarity may be strapped to ground or either polarity may be floated to an external voltage Additionally the two main supplies can be used as a split supply with two positive voltages and a common negative two negative voltages and a common positive or one positive one negative and a common This power supply is suitable for a variety of applications The instrument can serve as a single or multi voltage power source for breadboard and prototype circuits and equipment It can provide single or simultaneously varying voltages for circuit evaluation It can provide tracking and voltages for evaluating differential amplifiers It may be used as a battery eliminator or to power individual circuit boards or cards while removed from the system The features and versatility of the unit especially the triple output and tracking features make it an ideal general purpose power supply for school laboratories and home use as well as a variety of applications found in the fields of service repair and production 1 1 Key Features Fully featured adjustable triple output DC power supply Operates as three separate power supplies Each power supply is completely isolated from the other two each output can be floated and either polarity may be grounded Two large panel mounted LED meter displays can monitor the output
13. ly 3A OVERLOAD Indicator Flashes when load current exceeds 3A MASTER Supply Controls and Indicators 9 10 7 8 15 16 17 C C Constant Current Indicator Red LED lights when the MASTER supply is in Constant Current mode The Power Supply regulates the output current at the value set by the MASTER CURRENT control In the Parallel Tracking mode when this indicator is lit both the MASTER and SLAVE supplies are in the Constant Current mode C V Constant Voltage Indicator Green LED lights when the MASTER supply is in Constant Voltage mode The Power Supply regulates the output voltage at the value set by the MASTER voltage In Parallel Tracking mode when this indicator is lit both the MASTER and SLAVE supplies are in the Constant Voltage mode VOLTAGE Control Adjustment of the output voltage of the MASTER supply Also functions as adjustment control for the maximum output voltage of the SLAVE supply when either parallel or series tracking mode is selected CURRENT Control Adjusts current limit of the MASTER supply in constant voltage mode Adjusts constant current value of MASTER supply in constant current mode Adjusts current for both supplies when in parallel mode Terminal Positive polarity output terminal for the MASTER supply Also serves as the positive polarity terminal when operating the instrument in parallel and series tracking mode GND Earth and Chassis Ground
14. minal of the 5V 3A supply Connect the negative polarity of the device being powered to the black terminal of the 5V 3A supply If the red OVERLOAD indicator lights the load placed on the supply is too high This will cause voltage and current to drop and prevent proper operation of the supply To correct this situation the load on the supply must be decreased so that no more than 3 amps of current are required 2 wa Note Either the positive or the negative terminal can be connected to the MASTER or SLAVE s Earth GND terminal If it is not known whether the chassis is common with either the positive or negative polarity none of the 2 terminals should be connected to Earth GND Make sure that the hook up leads offer sufficient current capability and low resistance between the power supply and the circuits being powered 6 MAINTENANCE WARNING The following instructions are for use by qualified personnel only To avoid electrical shock do not perform any servicing other than what s described in the operating instructions unless you are qualified to do so 6 1 Fuse Replacement If the fuse blows the power lamp indicators will not light and the oscilloscope will not operate The fuse should not normally open unless a problem has developed in the unit Try to determine and correct the cause of the blown fuse then replace only with the correct fuse The fuse is located in a fuse compartment which is part of the AC receptacle
15. n insulated work surface on which to place equipment Don t expose high voltage needlessly Remove housings and covers only when necessary Turn off equipment while making test connections in high voltage circuits Discharge high voltage capacitors after removing power Table of Content 1 Product Introduction ssccssscsssccsscsssesssesssssscsesssesesesscssscseees 5 1 1 Description cecsccs cccsecs cessive tend elelenicesge gence E teed eled dase E tens 5 TD Key Heattes serip Aiotunthe cs E awa EASE A A 5 2 SPOCHICATIONS cccecicessssscsncsccccceseensssnssoedecesueasosasonsecesvenseossecesicseesseces 6 3 Safety Information and Installation ccsccsccssssssessssesceseees 7 3 1 Unpacking the instrument 00 eececeeeecesecececeeeceeeeseeeeeeeeeeeeeneeeneeneees 7 3 2 Checking the Line Voltage cceccesceceessecsecseeeneeeseeseeeeseeeseneeeneenaees 7 3 2 COONS xsi else EEEE EI E DEE EE 7 4 Panel Introduction ssccssccssccsessessceesesssesscssscssesssescsesseesees 9 4 1 Front Panel sit snatch ene nuit nk aed 7 A2 Rear Panel lt ies fests arra raan eE aa aaa cite aaa ane NE step aaan 7 5 Operating Instructions ccscccscesccecssscecssscesccesssccesscseesseseees 11 5 1 General Precautions eiee e a a i iea 11 5 2 Getting Started Independent use of the Master or Slave Supply 11 5 3 Typical Constant Voltage Operation ccccecceesseeseeeeeeseeeseeeeeeteeneees 1
16. of the MASTER supply GND Earth and Chassis Ground Terminal Negative polarity output terminal for the SLAVE supply Also serves as the negative polarity terminal for series tracking operation Voltage Display Displays the voltage of the SLAVE Supply Current Display Displays the Current of the SLAVE Supply 4 2 Rear Panel 24 Ventilation fan ventilation holes 25 Input voltage selector Set switch to corresponding line voltage 26 AC Power Input Connector Connect the AC power cord to this receptacle 27 Fuse Compartment 5 OPERATING INSTRUCTIONS 5 1 General Precautions Avoid using the power supply in ambient temperatures above 40 C Always allow sufficient air space around the venting hole at the rear of the power supply for effective radiation to prevent internal heat build up Do not exceed the voltage rating of the circuit being powered Many transistors and integrated circuits will not withstand voltage of 30 volts 5 2 Getting Started Independent use of the MASTER or SLAVE Supply The MASTER and SLAVE supplies each provide a 0 30V output of up to 3 Amps This procedure covers the use of the MASTER and SLAVE supplies when used independently from one another In the Independent operating mode the controls of the two power supplies are completely independent and either supply can be used individually or both can be used simultaneously Hook up 1 Disengage all MODE switches so that the power
17. ries AC Line Cord included Instruction manual Fuse 1 set of test leads 2 Earth Ground bus straps Dimensions 128 x 145 x 285 mm WxHxD 5 0 x 5 7 x 11 2 Weight 9Kg 19 8 Ibs Specifications and information provided are subject to change without notice Please visit www lodestarelectronics com for the most current product information 3 SAFETY INFORMATION AND INSTALLATION 3 1 Unpacking the Instrument The product has been fully inspected and tested before shipping from the factory Upon receiving the instrument immediately unpack and inspect it for any damages that might have been sustained during transportation If any sign of damage is found notify your local distributor immediately 3 2 Checking the Line voltage This instrument will operate on AC 220V or 110V Before connecting the power plug to an AC line outlet make sure the voltage selector is set to the position corresponding to the line voltage Note that the instrument may be damaged if it is connected to the wrong AC line voltage WARNING To avoid electrical shock the power cord protective grounding conductor must be connected to ground Replace the required fuses according to this table Line voltage Range Fuse AC 220V 198V to 242V T 3A 250V AC 110V 100V to 120V T 6A 250V WARNING To avoid personal injury disconnect the power cord before removing the fuse holder 3 2 Cooling Before applying pow
18. s the sum of the MASTER and SLAVE Current Display 3 Adjust the output voltage to the desired level using the MASTER VOLTAGE controls 2 wa 4 5 Nun Turn off the power supply and the equipment to be powered during hook up wm Connect the positive polarity of the device being powered to the red terminal of the MASTER power supply Connect the negative polarity of the device being powered to the black terminal of the SLAVE power supply Turn on power supply Note If the negative polarity of the equipment or circuit being powered is also the chassis or common it may be grounded to earth by strapping the black terminal to the green GTND terminal of the MASTER supply Similarly the positive polarity can be grounded by strapping the red terminal to the green GND terminal If an earth ground reference is not required or if it is not known whether the chassis is common with either the positive or negative polarity do not connect the Earth GND terminal to either the or terminal Make sure that the hook up leads offer sufficient current capability and low resistance between the power supply and the circuits being powered 10 amp test leads are available as an optional accessory 5 8 Fixed Power Supply The fixed power Supply provides a 5V DC output with a 3 amp current capacity The supply is ideal for use with TTL circuits 1 Connect the positive polarity of the device being powered to the red ter
19. ss of use 21 8 APPENDIX 8 1 CE Declaration Declaration of CE Conformity BK PRECISION According to EEC directives and NF EN 45014 norm Responsible Party Manufacturers Alternate Manufacturing Name B amp K Precision Corporation Site B amp K China 1355 Manufacturer s Address 22820 Savi Ranch Pkwy Yorba Linda CA 92887 4610 USA Declares that the below mentioned product Product Name Power Supply Part Numbers LS1330 complies with the essential requirements of the following applicable European Directives Low Voltage Directive 73 23 EEC 19 02 73 amended by 93 68 EEC 22 07 93 Electromagnetic Compatibility EMC 89 336 EEC 03 05 88 amended by 92 68 EEC 22 07 93 and conforms with the following product standards Safety EN 61010 1 2001 EMC EN 61326 1997 A1 1998 A2 2001 EN 50081 1 EN 50081 2 This Declaration of Conformity applies to above listed products place on the EU market after r m i Ane i OIRE January 31 2007 ra Date Victor Tolan President 22 intentionally left blank 23 Lodestar Electronics Co www lodestarelectronics com Printed in China Ver 1 0 0207 2007 B amp K Precision Corporation 24
20. to the device to be powered 4 Turn on the power supply 5 wm Increase the CURRENT control setting until the desired constant current value is read on the display or set the current limit in advance before connecting the load as prescribed earlier in the Setting Current Limit procedure If the load current drops below the constant current value the CC indicator will go off and the CV indicator will light In this case the power supply automatically switches to the constant voltage mode and further rotation of the CURRENT control will not increase the output current 15 Constant Voltage Constant Current Characteristic The working characteristic of this power supply is called a constant voltage constant current automatic crossover type This permits continuous transition from constant current to constant voltage modes in response to the load change The intersection of constant voltage and constant current modes is called the crossover point The figure below shows the relationship between this crossover point and the load For example if the load is such that the power supply is operating in the constant voltage mode a regulated output voltage is provided The output voltage remains constant as the load increases up until the point where the preset current limit is reached At that point the output current becomes constant and the output voltage drops in proportion to further increases in load The crossover point is indicated
21. use only one of these 2 configurations Connecting two ground straps on Master and Slave side could ground both the positive and negative terminals and load down the power supply causing improper operation If an earth ground reference is not required or if it is not known whether the chassis is common with either the positive or negative polarity do not reference either positive or negative terminal to the GND terminal Make sure that the hook up leads offer sufficient current capability and low resistance between the power supply and the circuits being powered 17 5 6 Parallel Tracking Operation In the parallel tracking mode of operation both supplies are strapped together in parallel This allows for a 0 30 V supply with a 6 Amps current capability Only the MASTER output terminals are used for parallel tracking operation In the parallel tracking mode the SLAVE supply output voltage and current track the MASTER supply output voltage and current 1 Set the power supplies to the PARALLEL tracking mode by engaging both MODE buttons The PAR LED indicator will turn on Because both Voltage and Current of the SLAVE supply track the MASTER supply the maximum current and voltage are set using the MASTER controls the Slave controls are disabled Using the MASTER supply output terminals follow the instructions for Setting Current Limit in section 5 3 Remember that the actual current output at the MASTER supply output terminal i
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