B&K 1651A, 1652 Constant voltage/constant current characteristic, Series Tracking Operation

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OPERATING INSTRUCTIONS___________________________________________________________________________

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. Fig. 7 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 by the front panel LED indicators. The crossover point is reached when the CONSTANT CURRENT 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 0.5 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 0.5 amp charging rate. This is the crossover point where the power supply goes into the constant voltage mode.

Figure 7. Constant voltage/constant current characteristic.

SERIES TRACKING OPERATION

When the series tracking mode of operation is selected, the positive (red) terminal of the “B” supply output is internally connected to the negative (black) terminal of the “A” supply. This allows the power supply to be used as a single 0-to-48 volt power supply simply by using the negative (black) terminal of the “B” supply and the positive (red) terminal of the “A” supply.

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Contents Instruction Manual Test Instrument Safety DC Power Supply Table of Contents Introduction Introduction Features Reverse Polarity Protection Isolated OutputOverload Protection HOOK-UP CablesSpecifications B SuppliesFixed 5V Supply GeneralControls and Indicators Supply Controls and IndicatorsControls and Indicators Constant Current Indicator Fixed 5V Supply Terminals and Indicator Rear Panel Controls Line Voltage Select Switches. CombinationRear panel controls Operating Instructions Safety PrecautionsEquipment Precautions Independent USE of a or B SupplyOperating Instructions Hook-up Operating Instructions Independent operation grounding possibilities sheet 2 Setting Current Limit Setting Current limit Constant voltage/constant current characteristic Series Tracking OperationOperating Instructions Operating Instructions Operating Instructions Parallel Tracking Operation Parallel tracking operation grounding possibilities sheet 1 Parallel tracking operation grounding possibilities sheet 2 Fixed 5 V Power Supply Operation Grounding possibilities for fixed 5 V power supply sheet 1 Grounding possibilities for fixed 5 V power supply sheet 2 Operating Instructions Electronics Servicing ApplicationsElectronics Manufacturing Electronics Education Battery ChargingElectronics Design LAB Split SupplyPage Page Page Page Page Page Maintenance Fuse ReplacementService Information Limited One-Year Warranty Test Instrument Safety Manual DE Instrucciónes Fuente DE Poder DE CD Triple Seguridad DEL Instrumento DE Prueba Advertencia Seguridad DEL Instrumento DE Prueba Instrucciones DE OperaciónIntroduccion DOS Fuentes DE O a Salida TripleFuente Fija DE Característica DE Rastreo UnicaProtección Contra Sobreflujo Salida AisladaProtección DE Polaridad Inversa Cables Especificaciones Fuentes a Y BGeneral Controles E Indicadores Figura 1. Controles e indicadores del panel frontal Indicador Constant Current Controles E Indicadores DE LA Fuente BIndicadores Y Controles DE LA Fuente DE Controles DEL Panel TraseroFigura 2. Controles del panel trasero Precauciones Para Seguridad USO Independiente DE LA Fuente a O BInstrucciones DE Operación Page Page Figura 4. Operación de voltaje constante típica Operación de corriente constante típica Característica de voltaje constante/corriente constante Operación DE Rastreo EN SeriePage Page Instrucciones DE Operación Operación DE Rastreo EN Paralelo Page Page Operación DE LA Fuente Fija DE Page Page Instrucciones DE Operación Servicio Electrónico Manufactura ElectrónicaCarga DE Baterias Laboratorio DE Diseño ElectrónicoEducación EN Electrónica Fuente DivididaAplicaciones Aplicaciones Aplicaciones Aplicaciones Aplicaciones Aplicaciones Mantenimiento Información de Servicio Garantía Limitada de Un Ano Seguridad DE EL Equipo DE Prueba Declaration of CE Conformity Savi Ranch Parkway Yorba Linda, CA 2005 B&K Precision Corp