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Agilent Technologies 6614C, 6634B RMS Measurements Agilent 66312A, 66332A Only, Current Ranges

Models: 6632B 6633B 66332A 6634B

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3 - Programming the DC Source

This results in a data acquisition time of 32 milliseconds. Adding a command processing overhead of about 20 milliseconds results in a total measurement time of about 50 milliseconds per measurement sample.

Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition window. More cycles in the aquisition window results in better ripple rejection. If you increase the time interval for each measurement to 45 microseconds for example, this results in 5.53 cycles in the acquisition window at 60 Hz, for a ripple rejection of about 70 dB.

Note that the speed of the measurement can be increased by reducing the number of sample points. For example, the commands

SENSe:SWEep:TINTerval 15E-6

SENSe:SWEep:POINts 1024

speeds up the acquisition period to 16 milliseconds; however, the tradeoff is reduced measurement accuracy.

RMS Measurements (Agilent 66312A, 66332A Only)

To read the rms content of a voltage or current waveform, use:

MEASure:VOLTage:ACDC? or

MEASure:CURRent:ACDC?

This returns the total rms measurement, including the dc portion.

Making rms measurements on ac waveforms for which a non-integral number of cycles of data has been acquired may result in measurement errors due to the last partial cycle of acquired data. The instrument reduces this error by using a Hanning window function when making the measurement.

Minimum and Maximum Measurements (Agilent 66312A, 66332A Only)

To measure the maximum or minimum voltage or current of a pulse or ac waveform, use:

MEASure:VOLTage:MAXimum?

MEASure:VOLTage:MINimum?

MEASure:CURRent:MAXimum?

MEASure:CURRent:MINimum?

Current Ranges

The dc source has two current measurement ranges. The command that controls the ranges is:

SENSe:CURRent:RANGe MIN MAX

When the range is set to MIN, the maximum current that can be measured is 20 milliamperes.

Returning Measurement Data From the Data Buffer (Agilent 66312A, 66332A Only)

The MEASure and FETCh queries can also return all data values of the instantaneous voltage or current buffer. The commands are:

MEASure:ARRay:CURRent?

MEASure:ARRay:VOLTage?

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Agilent Technologies 6614C, 6634B, 6633B, 6632B, 6613C, 6631B RMS Measurements Agilent 66312A, 66332A Only, Current Ranges

Contents

System DC Power Supply Programming GuideDynamic Measurement DC Source Agilent Models 66312A, 66332ASafety Guidelines Printing HistoryTable of Contents 1 - GENERAL INFORMATION2 - INTRODUCTION TO PROGRAMMING 3 - PROGRAMMING THE DC SOURCE4 - LANGUAGE DICTIONARY Output Commands Status CommandsC - ERROR MESSAGES A - SCPI CONFORMANCE INFORMATIONB - COMPATIBILITY LANGUAGE D - EXAMPLE PROGRAMSGeneral Information About this GuideDocumentation Summary External References GPIB ReferencesSCPI References VXIplug&play Power Products Instrument Drivers Downloading and Installing the DriverIntroduction to Programming Supported ApplicationsAccessing Online Help GPIB Capabilities of the DC SourceRS-232Capabilities of the DC Source GPIB AddressRS-232Flow Control RS-232Programming ExampleBaud Rate RS-232Troubleshooting Introduction to SCPIConventions Used in This Guide Types of SCPI Commands Multiple Commands in a MessageIncluding Common Commands Using QueriesTypes of SCPI Messages Moving Among SubsystemsQuery Indicator The Message UnitHeaders Message Unit SeparatorSCPI Data Formats Numerical Data FormatsSuffixes and Multipliers Response Data TypesSCPI Command Completion Using Device ClearPage Power-onInitialization Programming the DC SourceIntroduction Programming the OutputOutput Voltage Output CurrentMaximum Voltage Maximum CurrentSetting the Voltage or Current Trigger Levels Triggering Output ChangesSCPI Triggering Nomenclature Output Trigger System ModelInitiating the Output Trigger System Generating TriggersMaking Measurements Voltage and Current MeasurementsRMS Measurements Agilent 66312A, 66332A Only Current RangesInternally Triggered Measurements Measurement Trigger System ModelSCPI Triggering Nomenclature 3 - Programming the DC Source Page Current Detector Pulse Measurement QueriesControlling Measurement Samples Varying the Voltage or Current Sampling RateMultiple Measurements Agilent 66312A, 66332A Only Figure 3-6. Pre-eventand Post-eventTriggering Programming the DC Source Power-OnConditions Programming the Status RegistersRQS ,**$ Operation Status Group Table 3-1.Bit Configurations of Status RegistersSignal CommandQuestionable Status Group Standard Event Status GroupStatus Byte Register CommandDetermining the Cause of a Service Interrupt The MSS BitThe RQS Bit The MAV Bit and Output QueueInhibit/Fault Indicator Monitoring Both Phases of a Status TransitionDiscrete Fault Indicator DFI Remote Inhibit RIUsing the Inhibit/Fault Port as a Digital I/O DFI Programming ExampleFAULT/INHIBIT Bit WeightPage Subsystem Commands Language DictionaryIntroduction Table 4-1.Subsystem Commands Syntax Table 4-1.Subsystem Commands Syntax continued Table 4-1.Subsystem Commands Syntax continued Common Commands Programming ParametersTable 4-2.Common Commands Syntax Table 4-3.Output Programming ParametersCalibration Commands CALibrate CURRentCALibrate CURRent NEGative CALibrate CURRent MEASure LOWRangeCALibrate PASSword CALibrate DATACALibrate LEVel CALibrate SAVECALibrate STATe CALibrate VOLTageCALibrate VOLTage PROTection CAL STAT 1,6812 CAL STAT OFFMeasurement Commands MEASure ARRay CURRent? FETCh ARRay CURRent?MEASure ARRay VOLTage? FETCh ARRay VOLTage? MEASure CURRent? FETCh CURRent? MEASure CURRent ACDC? FETCh CURRent ACDC?MEASure CURRent HIGH? FETCh CURRent HIGH? MEASure CURRent LOW? FETCh CURRent LOW? MEASure CURRent MAXimum? FETCh CURRent MAXimum?MEASure CURRent MINimum? FETCh CURRent MINimum? MEASure VOLTage? FETCh VOLTage? MEASure VOLTage ACDC? FETCh VOLTage ACDC?MEASure VOLTage HIGH? FETCh VOLTage HIGH? MEASure VOLTage LOW? FETCh VOLTage LOW? MEASure VOLTage MAXimum? FETCh VOLTage MAXimum?MEASure VOLTage MINimum? FETCh VOLTage MINimum? SENSe CURRent RANGe SENSe CURRent DETectorSENS CURR DET ACDC SENSe FUNCtion SENSe SWEep OFFSet POINtsSENSe:SWEep:POINts SENSe SWEep TINTervalSENSe WINDow HANNingRECTangular Returned Parameters CRDOutput Commands OUTPutOUTPut DFI OUTPut DFI SOURceOUTPut PROTection DELay OUTPut PON STATeOUTPut PROTection CLEar OUTP PON STAT RSTOUTPut RELay OUTPut RELay POLarityOUTPut RI MODE OUTP REL POL NORMSOURce CURRent SOURce CURRent TRIGgerSOURce CURRent PROTection STATe CURR PROT STAT 1CURRENT PROTECTION STATE ONSOURce DIGital DATA SOURce DIGital FUNCtionSOURce VOLTage DIG DATASOURce VOLTage ALC BANDwidth? SOURce VOLTage ALC BWIDth?SOURce VOLTage TRIGger SOURce VOLTage PROTectionStatus Commands STATus PRESetSTATus OPERation? STATus OPERation CONDition?STATus OPERation ENABle STATUS OPERATION ENABLE?STATus OPERation NTR STATus OPERation PTR STATus QUEStionable ENABle STATus QUEStionable?STATus QUEStionable CONDition? STAT QUES COND? STATUS QUESTIONABLE CONDITION?STATus QUEStionable NTR STATus QUEStionable PTR Command SyntaxPreset Value Related CommandsESR? Command Syntax Parameters Power-OnValue ExamplesQuery Syntax Returned Parameters Related Commands Related CommandsPage STB? System Commands DISP TEXT DEFAULT MODEDISPlay DISPlay MODESYSTem ERRor? SYSTem LANGuageSYSTem VERSion? Query Syntax SYSTem ERRor? Parameters NoneSYSTem LOCal SYSTem:REMoteSYSTem RWLock IDN?OPT? TST? Trigger Commands ABORtINITiate SEQuence INITiate NAME INITiate CONTinuous SEQuence1TRIGger TRIGger SOURceTRIGger SEQuence2 TRIGger ACQuire TRIGger SEQuence2 COUNt CURRent TRIGger ACQuire COUNt CURRentTRIGger SEQuence2 COUNt VOLTage TRIGger ACQuire COUNt VOLTageTRIGger SEQuence2 HYSTeresis CURRent TRIGger ACQuire HYSTeresis CURRentTRIGger SEQuence2 HYSTeresis VOLTage TRIGger ACQuire HYSTeresis VOLTageTRIGger SEQuence2 LEVel CURRent TRIGger ACQuire LEVel CURRentTRIGger SEQuence2 LEVel VOLTage TRIGger ACQuire LEVel VOLTageTRIGger SEQuence2 SLOPe CURRent TRIGger ACQuire SLOPe CURRentTRIGger SEQuence2 SLOPe VOLTage TRIGger ACQuire SLOPe VOLTageTRIGger SEQuence2 SOURce TRIGger ACQuire SOURce TRIGger SEQuence1 DEFine TRIGger SEQuence2 DEFinePage SCPI Confirmed Commands Non-SCPICommandsSCPI Conformance Information SCPI VersionPage Compatibility Language IntroductionTable B-2.COMPatibility Commands Compatibility CommandSimilar SCPI Command DescriptionCompatibility Command Table B-2.COMPatibility Commands continuedCommand DescriptionTable B-2.COMPatibility Commands continued Figure B-1.COMpatibility Status Model Page Error Messages Error Number ListTable C-1.Error Numbers continued Error NumberError String Description/Explanation/Examples Error Number Table C-1.Error Numbers continuedError String Description/Explanation/Examples Page Example Programs Assigning the GPIB Address in ProgramsTypes of DOS Drivers IntroductionError Handling BASIC ControllersExample Programs - D 990’----------------------Merge DECL.BAS here 1225 Example 3. Controller Using BASIC INDEX Index Page varying voltage or current sampling, 29 voltage maximum, 20 measurementswaiting for measurement results XON-XOFF,11Manual Updates 11/9/991/4/00 All references to HP have been changed to Agilent