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Fluke instruction manual Current Standby, 5725A Operating Functions and Modes

Models: 5725A

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5725A Operating Functions and Modes

Operating Notes 3

5725A Operating Functions and Modes

Current Standby

NO OUTPUT

	CURRENT
	OUTPUT	VOLTAGE MODE
	HI	CURRENT MODE
	HI	5725A STANDBY
		5725A STANDBY
	11A
	MAX	FAULT
	LO	FAULT
	LO	OVERLOAD
	2OV	OVERLOAD
	PK	CABLE OFF
	MAX	CABLE OFF

				3-9.
				BOOST
				LIT
	OUTPUT	SENSE
	V ΩA	V ΩA		μ
NO			WIDEBAND	μ
NO	HI		HI
OUTPUT
	LO		LO
	HI
	AUX	GUARD	GROUND	•
	CURRENT

				aq10i.eps

Current standby mode is when both CURRENT MODE and 5725A STANDBY indicators are lit. In current standby mode, the 5725A is not supplying an output. Current standby occurs under any of the following conditions:

∙When the 5700A current output location is set to "5725A", and any ac or dc current level is showing on the 5700A Output Display with the STANDBY annunciator lit.

∙If "5725A" is selected in a 5700A setup menu as the current amplifier, and any of the following conditions are true:

1.An ac or dc current 2.2A or above is showing on the 5700A Output Display with the STANDBY annunciator lit.

2.Any level of dc current is showing on the 5700A Output Display with the STANDBY annunciator lit, and the BOOST key on the 5700A is pressed so that the BOOST indicator is lit.

3.An ac current 1A or above is showing on the 5700A Output Display with the STANDBY annunciator lit, and the BOOST key on the 5700A is pressed so that the BOOST indicator is lit.

4.The 5700A is ranged locked on the 11A range, and any dc current or an ac current 1A or above is showing on the Output Display with the STANDBY annunciator lit.

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Fluke instruction manual Current Standby, 5725A Operating Functions and Modes

Contents

Instruction Manual 5725AAmplifier Page Table of Contents Theory of Operation 5725ACalibration and Verification Instruction Manual 5725ATable List of TablesTitle Instruction Manual 5725AFigure List of FiguresTitle viii 5725AInstruction Manual Declaration of the Manufacturer or Importer Interference InformationBescheinigung des Herstellers/Importeurs Page Terms in this Manual OPERATOR SAFETY SUMMARYHIGH VOLTAGE LETHAL VOLTAGEUse the Proper Fuse Symbols Marked on EquipmentPower Source Use the Proper Power CordUse Care When Servicing With Power On SERVICING SAFETY SUMMANYFOR QUALIFIED SERVICE PERSONNEL ONLY Do Not Service AloneNever Accept Ordinary and General Tests for Death FIRST AID FOR ELECTRIC SHOCKFree the Victim From the Live Conductor Get HelpChapter Introduction and SpecificationsInstruction Manual 5725AIntroduction Where to Go From Here 5700A Operator Reference Guide How to Use the Manuals5725A Instruction Manual 5700A Operator Manual5700A Service Manual Specifications±5C from calibration temperature Introduction and SpecificationsSpecifications DC Voltage Range ResolutionInstruction Manual 5725AAC Voltage Specifications Introduction and SpecificationsAC Voltage continued Voltage Range 5725AInstruction Manual AC Voltage continuedTemperature Introduction and SpecificationsSpecifications ±5C from calibration temperatureNote5725A Instruction Manual Two-WireCompFour-Wire Four-WireSpecifications Introduction and SpecificationsDC Current Instruction Manual 5725AAC Current Specifications Introduction and SpecificationsAC Current continued Instruction Manual ResolutionResolution 5725ATemperature performance: Operating: 0C to 50C Introduction and SpecificationsSpecifications General SpecificationsInstruction Manual 5725AConnecting to the 5700A Calibrator InstallationService Information Placement and Rack MountingInstruction Manual 5725AInstallation Unpacking and InspectionIntroduction VOLTAGE/CURRENT 5725AInstruction Manual TYPEService Information Service InformationPlacement and Rack Mounting Cooling ConsiderationsFigure 2-2.Correct Way to Dress Interface Cable Connecting to the 5700A CalibratorSelecting Line Voltage Selecting Line VoltagewCaution Accessing the FuseConnecting to Line Power Connecting to Line PowerInstruction Manual 5725AChapter Operating NotesInstruction Manual 5725AOperating Notes Introduction5725A Front Panel FeaturesFigure 3-1.Front Panel Features POWER5725A STANDBY Indicator A B C D E F G HRear Panel Features Table 3-1.Front Panel FeaturesInstruction Manual Rear Panel FeaturesFigure 3-2.Rear Panel Features 5725A5700A CALIBRATOR Connector A B C D E F G H ITable 3-2.Rear Panel Features CALIBRATION SwitchWarm Up Turning on the 5725A AmplifierStandby 5725A Operating Functions and ModesVoltage Standby 5725A Operating Functions and Modes Current Standby3-10 Voltage Operate3-11 Current OperateConditions That Activate the 5725A 3-12 Conditions That Activate the 5725AChapter Theory of OperationHigh Voltage Amplifier Feedback High Voltage Sense Assembly A6High Voltage Amplifier A3 High Voltage Heat Sink AssembliesIntroduction Overall Functional Description5725A Figure 4-1.5725A Overall Block DiagramInstruction Manual 1100V AC Range Functional Description 11A Range Functional Description Voltage Standby Operation in the 11A DC RangeOperation in the 11A AC Range Voltage and Current Standby Modes4-11 How the 5700A and 5725A Communicate4-10 Description of the Out-GuardLines 5725A Side4-12 Description of the In-GuardLines4-13 Functional Summaries by Assembly4-15 Interconnect Assembly A1Detailed Circuit Description 4-144-16 Power Supply Assembly A4REF DES High Voltage Supply Section4-17 ASSEMBLY4-18 Switching Section4-20 Current-LimitSection4-19 System Supply Section4-22 Digital Assembly A5Fan Supply Section 4-21aq19f.eps Figure 4-2.Digital Assembly Block DiagramTheory of Operation Detailed Circuit Description4-27 EEROM4-26 Data LatchBreak-DetectCircuitry Power Up and Reset CircuitryWatchdog Timer Current Amplifier Assembly A2Instruction Manual 5725Aaq20f.eps 4-35 Error Amplifier Section4-37 Output Stage Section4-36 Monitor Section4-39 Control and Switching SectionPower Supply Section 4-384-41 High Voltage Amplifier A34-40 Input AmplifierDetailed Circuit Description Theory of Operationaq22f.eps 4-43 Integrator4-42 Window Comparator4-46 Transconductance and Cascode Stage4-45 Midstage4-50 Autobias Current Source4-49 Autobias Sense Circuit4-51 Signal TransformersTemperature Monitoring High Voltage Amplifier Feedback4-54 High Voltage Sense Assembly A6Detailed Circuit Description Theory of Operationaq21f.eps 4-55 Sense Amplifier Section±3.2V during calibration STANDBY VOLTAGE LIMITS1 Analog Monitor Section4-56 SIGNAL4-58 Analog Input Switching SectionSerial Interface/Guard Crossing Section 4-574-59 Control Section4-60 AC Line Voltage Selection SectionInstruction Manual 5725AChapter Calibration and VerificationInstruction Manual 5725AIntroduction Where to Find Further InformationCalibration and Verification Instruction Manual 5725AChapter MaintenanceInstruction Manual 5725AIntroduction Replacing the FuseCleaning the Air Filter Cleaning PCA’s General CleaningGeneral Cleaning B. BOTTOM VIEW Access ProceduresFigure 6-3.Assembly Location Diagram A. TOP VIEWwWarning Initial Access ProcedureHIGH VOLTAGE Accessing the Digital Assembly A5 Accessing the Power Supply Assembly A4Instruction Manual WHEN REINSTALLING DIGITAL ASSEMBLYFigure 6-5.Accessing the Digital Assembly 5725A6-10 Accessing the Current Amplifier Assembly A26-11 Accessing the High Voltage Amplifier A3Figure 6-6.Correct Way to Dress Cables 6-12 Accessing the High Voltage Sense Assembly A66-14 Accessing the High Voltage Output TransistorsAccessing the Interconnect Assembly A1 6-136-15 Enabling Front or Rear Binding Posts9.Reinstall the top cover Chapter TroubleshootingInstruction Manual 5725ASelf Diagnostics 5725A Fault CodesIntroduction MESSAGE Table 7-1.5725A Fault CodesFAULT 5725A Instruction ManualMESSAGE Self DiagnosticsTable 7-1.5725A Fault Codes cont FAULTManual Tests for Fault Isolation MESSAGE Manual Tests for Fault IsolationTable 7-2.Analog Monitor Faults FAULT NOProblem 5 Fault When Entering Current Operate Reduced-VoltageTroubleshooting ModeProblem 3: Fault When Entering Voltage Operate Problem 4: Fault When Entering Current Standby7-10 Testing the Power Supply By ItselfTesting the Power Supply By Itself Instruction Manual 5725AChapter List of Replaceable PartsInstruction Manual 5725AIntroduction How to Obtain PartsManual Status Information Newer Instruments5725A Service CentersAssembly Name Table 8-1.Final AssemblyList of Replaceable Parts Table 8-1.Final Assembly cont5725A Figure 8-1.Final Assemblyaq24f.tif List of Replaceable Parts Figure 8-1.Final Assembly contaq25f.tif aq26f.tif Figure 8-1.Final Assembly cont5725A Instruction ManualList of Replaceable Parts Figure 8-1.Final Assembly contaq27f.tif aq28f.tif Figure 8-1.Final Assembly cont5725A Instruction ManualList of Replaceable Parts Figure 8-1.Final Assembly contaq29f.tif aq30f.tif Figure 8-1.Final Assembly cont5725A Instruction ManualList of Replaceable Parts Figure 8-1.Final Assembly contaq31f.tif Table 8-2.A1 Interconnect PCA 5725Aaq36f.eps List of Replaceable Parts5725A-1611 Figure 8-2.A1 Interconnect PCAInstruction Manual 5725ATable 8-3.A2 Current Amplifier PCA Table 8-3.A2 Current Amplifier PCA cont List of Replaceable PartsReference Description Designator 5725AInstruction Manual Table 8-3.A2 Current Amplifier PCA contaq37f.eps List of Replaceable Parts5725A-1650 Figure 8-3.A2 Current Amplifier PCAInstruction Manual 5725ATable 8-4.A3 High Voltage Amplifier PCA Table 8-4.A3 High Voltage Amplifier PCA cont List of Replaceable PartsDesignator R640,R642 5725AInstruction Manual Table 8-4.A3 High Voltage Amplifier PCA contaq38f.eps List of Replaceable Parts5725A-1661 Figure 8-4.A3 High Voltage Amplifier PCA5725A Table 8-5.A4 Power Supply PCAInstruction Manual List of Replaceable Parts Table 8-5.A4 Power Supply PCA contR351 R355 R361,R362 Table 8-5.A4 Power Supply PCA cont5725A Instruction Manualaq39f.eps Figure 8-5.A4 Power Supply PCAList of Replaceable Parts 5725A-1631Instruction Manual 5725ATable 8-6.A5 Digital PCA aq40f.eps List of Replaceable Parts5725A-1650 Figure 8-6.A5 Digital PCATable 8-7.A6 High Voltage Sense PCA 5725ATable 8-7.A6 High Voltage Sense PCA cont List of Replaceable PartsR154 R155 R156,R158,R168 R173 R162 R171 R172,R175 5725AInstruction Manual Table 8-7.A6 High Voltage Sense PCA contaq41f.eps List of Replaceable Parts5725A-1601 Figure 8-7.A6 High Voltage Sense PCA5725A Table 8-8.A12 Transformer Enclosure AssemblyInstruction Manual List of Replaceable Parts Figure 8-8.A12 Transformer Enclosure Assemblyaq32f.tif aq33f.tif 5725Aaq34f.tif List of Replaceable PartsInstruction Manual 5725Aaq35f.tif Figure 8-9.A30 Inductor PCA List of Replaceable PartsTable 8-9.A30 Inductor PCA 5725A-16035725A Chapter Schematic DiagramsInstruction Manual 5725Aaq48f.eps Schematic Diagrams5725A-1611 Figure 9-1.A1 Interconnect PCAInstruction Manual 5725AFigure 9-1.A1 Interconnect PCA cont Figure 9-1.A1 Interconnect PCA cont Schematic Diagrams5725A-1650 5725AInstruction Manual Figure 9-2.A2 Current Amplifier PCAFigure 9-2.A2 Current Amplifier PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-2.A2 Current Amplifier PCA cont Figure 9-2.A2 Current Amplifier PCA cont Schematic Diagrams5725A-1661 5725AInstruction Manual Figure 9-3.A3 High Voltage Amplifier PCAFigure 9-3.A3 High Voltage Amplifier PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-3.A3 High Voltage Amplifier PCA cont Figure 9-4.A4 Power Supply PCA Schematic Diagramsaq59f.eps 5725A Figure 9-4.A4 Power Supply PCA contFigure 9-4.A4 Power Supply PCA cont Schematic DiagramsTYPICAL COMMUNICATIONS ACTIVITY AT PINS 12 AND 13 OF U5075725A Instruction ManualFigure 9-5.A5 Digital PCA cont Schematic DiagramsVOLTAGE STANDBY 5725AInstruction Manual STANDBYFigure 9-6.A6 High Voltage Sense PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-6.A6 High Voltage Sense PCA cont Figure 9-6.A6 High Voltage Sense PCA cont Schematic DiagramsInstruction Manual 5725AFigure 9-6.A6 High Voltage Sense PCA cont Figure 9-7.A12 Transformer Enclosure Assembly Schematic Diagramsaq45f.eps Instruction Manual 5725AIndex 5725A Page Instruction Manual 5725AManual Supplement rear Change #1