HP_6289A.p11-20

SECTION 11IOPERATING INSTRUCTIONS3-1OPERATING CONTROLS AND INDICATORS3-5 NORMAL OPERATING MODE3-2 The front panel controls and indicators,to-3-6 The power supply is normally shipped with itsgether with the normal turn-on sequence,arerear terminal strapping connections arranged forshown in Figure 3-1.Constant Voltage/Constant Current,local sensing,local programming,single unit mode of operation.This strapping pattern is illustrated in Figure 3-2.The operator selects either a constant voltage or a锅0constant current output using the front panel con-VOLTStrols (local programming,no strapping changes arenecessary).METL机AI A2 A3 A4 A5 A6 A7 A8 A9 -S GND++5 AIO-AAA1TURN-ON SEQUENCEMONITORINGPUSH ON/OFP BUTION AND BUTTON SHOULD LIGHT.POINTS2.SET METER SWITCH TO DESIRED VOLTAGE RANGE.3.ADJUST VDLZAGE CONTROL UNTIL DESIREP OUTPUT VOLTAGEFigure 3-2.Normal Strapping PatternIS INDICATED ON METER.4.SET METER SWITCH DESIRED CURRENT RANGE AND SHORT CIR-3-75.ADJUST GURRENT CONTROLS FOR DESIRED OUTPUT CURRENT.CONSTANT VOLTAGE6.REMOVE SHORT AND CONNECT IOAD TO OUTPUT TERMINALS(PRONT3-8 To select a constant voltage output,proceedOR REAR).as follows:a.Turn-on power supply and adjust VOLTAGEFigure 3-1.Front Panel Controls and Indicatorscontrols for desired output voltage (output terminalsopen).b.Short output terminals and adjust CUR-3-3OPERATING MODESRENT controls for maximum output current allowable(current limit),as.determined by load conditions.3-4The power supply is designed so that its modeIf a load change causes the current limit to be ex-of operation can be selected by making strappingceeded,the power supply will automatically cross-connections between particular terminals on theover to constant current output at the preset currentterminal strip at the rear of the power supply.Thelimit and the output voltage will drop proportionate-terminal designations are stenciled in white on thely.In setting the current limit,allowance must bepower supply above their respective terminals.Al-made for high peak current which can cause un-though the strapping patterns illustrated in thiswanted cross-over.(Refer to Paragraph 3-46.)section show the positive terminal grounded,theoperator can ground either terminal or operate the3-9CONSTANT CURRENTpower supply up to 300Vdc off ground (floating).The following paragraphs describe the procedures3-10 To select a constant current output,proceedfor utilizing the various operational capabilities ofas follows:the power supply.A more theoretical descriptiona.Short output terminals and adjust CUR-concerning the operational features of this supplyRENT controls for desired output current.is contained in Application Note 90,DC Power Sup-b.Open output terminals and adjust VOLTAGEply Handbook.which may be obtained from yourcontrols for maximum output voltage allowable(volt-local Hewlett-Packard field sales office.age limit),as determined by load conditions.If a3-1