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HP WaterSkis E1412A, WaterSkis E1312A manual FRESistanceAPERture?

Models: WaterSkis E1412A WaterSkis E1312A

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FRESistance:APERture

[SENSe:]FRESistance:APERture <number> sets the integration time in seconds for 4-wire resistance measurements. Values are rounded up to the nearest aperture time shown in the following table.

Parameters


Parameter Name	Parameter Type	Range of Values	Default Units

<number>	numeric	0.333ms3.33ms16.7ms	seconds
		167ms1.67sMINMAX

Comments • MIN sets the aperture time to 0.333ms. MAX sets the aperture time to

1.66667 seconds (60Hz) or 2 seconds (50Hz).

•Setting the aperture time also sets the integration time in power line cycles (PLCs) and the resolution. For example, an aperture time of 16.7ms (60Hz line frequency) sets an integration time of 1 PLC. The corresponding resolution depends on the function and range you select.

•The FRES:APER command overrides the results of previously executed FRES:NPLC and FRES:RES commands. The last command executed has priority.

•The greater the aperture time, the greater the normal mode rejection (and the lower the reading rate).

•Related Commands: CALibration:LFRrequency

•*RST Condition: FRES:APER 0.166667 seconds (60Hz) or FRES:APER 0.20000 (50Hz)

Example Set an Aperture Time of 16.7ms

FRES:APER 16.7E-03

Aperture time is 16.7ms.

FRESistance:APERture?

[SENSe:]FRESistance:APERture? [MINMAX] returns one of the following numbers to the output buffer.

•

•

The present aperture time in seconds if MIN or MAX is not specified.

The minimum aperture time available (.333ms) if MIN is specified.

•The maximum aperture time available (1.67s @ 60Hz; 2s @ 50Hz) if MAX is specified.

Example Query the Aperture Time

FRES:APER 167E-03	Aperture time is 167ms.
FRES:APER?	Query multimeter to return aperture time.
enter statement	Enter value into computer.

Chapter 3

Multimeter Command Reference 131

Image 131

HP WaterSkis E1412A, WaterSkis E1312A manual FRESistanceAPERture?

Contents

Contents Frequency and Period Measurement Errors Zeroauto ZEROAUTO? IMMediate Chapter Multimeter Command Reference Appendix a Appendix B Contents HEWLETT-PACKARD Warranty Statement Documentation History Manufacturer’s Name July 31 Jim White, QA Manager Business Reply Mail Page Using This Chapter HP E1312A and HP E1412A Multimeter Module SetupSetting the Module Address Switch Checking the Line Frequency Reference Setting the Line Frequency ReferenceInterrupt Priority Page Multimeter Functional Connections Switch Module Analog Bus ConnectionsVoltage Measurement Connections Wire Ohms Measurement Connections Initial Operation HP E1312A and HP E1412A Multimeter Module Setup ChapterFunction Prototype HP E1312A and HP E1412A Multimeter Module Setup Chapter DC Voltage Measurements Thermal EMF ErrorsMeasurement Tutorial Thermoelectric Voltages Loading Errors dc volts Leakage Current ErrorsCommon Mode Rejection CMR Rejecting Power Line Noise VoltagesNoise Caused by Ground Loops Noise Caused by Magnetic LoopsResistance Measurements Wire Ohms MeasurementsSet to 2-wire ohms function Making High-Speed DC and Resistance Measurements Power Dissipation EffectsErrors in High Resistance Measurements True RMS AC Measurements DC Current Measurement ErrorsCommon Crest Factors Example Crest Factor Errors non-sinusoidal inputsFunction and Range Change Internal Offset Correction Loading Errors ac voltsTemperature Coefficient Errors AC Measurements Below Full ScaleVoltage Measured = Vin2+ Noise2 Low-Level Measurement ErrorsMaking High-Speed AC Voltage or Current Measurements AC Current Measurement ErrorsFrequency and Period Measurement Errors AC Signal Filter DC Input Resistance Measurement ConfigurationNumber of Power Line Cycles Nplc Resolution Chapter HP E1312A/E1412A Multimeter Application Information SENSeZEROAUTO Offonceon Null Relative Function Math Operations CALCulate SubsystemCONFfunction DB MeasurementsStoring the dBm Reference Resistance Value DBm MeasurementsStoring the dB Reference Value HP E1312A/E1412A Multimeter Application Information Chapter Triggering the Multimeter TRIGgerSOURce EXTernal Checking the Trigger Source Wait-for-Trigger State Bus TriggeringExample Inserting a Trigger Delay Checking the Trigger Count Inserting a Trigger DelayExample Setting the Trigger Count Default Trigger Delays Checking the Sample Count Querying Delay Time Sample CountExample Setting the Sample Count HP VTL Software Visa HP E1312A and HP E1412A Multimeter Application ExamplesMaking Multimeter Measurements MEASure CommandMEASURE2 Source Code File MEASURE1 Source Code FileInit MEASURE3 Source Code FileMEASURE4 Source Code File HP E1412A Multimeter and Switch Module Synchronization Synchronizing Multimeter With a Switch ModuleSee -5 for the HP E1312A/E1412A Multimeter status system Retrieve the readings from the multimeter Set up the MultimeterNow set up the switch module Check the multimeter for system errorsMultimeter Status System Examples RST CLS *ESE Init OPC Synchopc Source Code FileRST Init FETC? Synchmav Source Code FileLoop End Loop Check the multimeter for system errorsLimittst Source Code File Programming Example Device ConfigurationPage HP E1312A/E1412A Multimeter Application Information Chapter Command Format Command TypesCommon Command Format Separator CommandAbbreviated Commands Implied Commands Parameters Linking CommandsPLC Multimeter Range and Resolution TablesAC Current Range versus Resolution Scpi Command ReferenceAC Voltage Range versus Resolution Aborting a Measurement Related Commands INITiate, TRIGgerABORt Valid Math/Measurement Function Combinations CALCulateSubsystem Syntax AVERageMINimum? AVERageAVERage?AVERageCOUNt? AVERageMAXimum?DBMREFerence? DBREFerenceDBREFerence? DBMREFerenceExample Query the Calculate Math Function FUNCtionFUNCtion? Parameter Summary ExampleLIMitUPPer? LIMitLOWerLIMitLOWer? LIMitUPPerSTATe? NULLOFFSetNULLOFFSet? STATeComments CALibrationCOUNt? LFRequencyExample Enter a New Calibration Security Code Example Query the Line Frequency SettingLFRequency? SECureCODEExample Set the Calibration State to Unsecured SECureSTATeSECureSTATe? STRingExample Query the Calibration Message STRing?VALue VALue?Zeroauto CAL? CALibration?Command Setting CONFigureFunction Range Resolution Default Settings for CONFigure Command by FunctionExample Making AC Current Measurements CURRentACExample Making DC Current Measurements CURRentDCResolutionMINMAXDEF selects the frequency function FRESistance Example Making 4-Wire Ohms MeasurementsPERiod Example Making 2-Wire Ohms Measurements Resolution MinmaxdefExample Making AC Voltage Measurements VOLTageACExample Making DC Voltage Measurements VOLTageDCSense HI and LO input VOLTageDCRATioString Returned CONFigure?POINts? DataExample Transferring Stored Readings to Output Buffer FETCh?Example Placing Multimeter in Wait-For-Trigger State INITiateIMMediate IMPedanceAUTO? Example Query the Input Impedance ModeINPut IMPedanceAUTOMEASure MEASCURRAC? 1,MAX CURRentAC?MEASCURRDC? .1,MAX CURRentDC?FREQuency? MEASFRES? 1500,MAX FRESistance?PERiod? RESistance? VOLTageAC? VOLTageDC? Example Making DC Voltage Ratio Measurements VOLTageDCRATio?RST Condition OUTPTTLTn OFF OUTPutTTLTrgSTATe Example Query Voltmeter Complete Destination TTLTrgSTATe?Example Route Voltmeter Complete to Trigger Line Example Transfer Readings Directly to Output Buffer READ?RST Condition Sampcoun Example Set the Sample Count SAMPleCOUNt SAMPCOUN? Example Query the Sample CountSENSe Zero Auto Offonceon AUTO? Function Example Query the Measurement FunctionExample Query the AC Current Measurement Range CURRentACRANGeCURRentACRANGe? CURRentACRANGeAUTO? Example Disable AC Current AutorangingExample Query the AC Current Autorange Mode CURRentACRANGeAUTOCURRentACRESolution? CURRentACRESolutionExample Query the Aperture Time CURRentDCAPERtureCURRentDCAPERture? Example Set an Aperture Time of 16.7msExample Query the DC Current Integration Time CURRentDCNPLCCURRentDCNPLC? Example Query the DC Current Measurement Range CURRentDCRANGeCURRentDCRANGe? Example Set the DC Current Range to 3ACURRentDCRANGeAUTO? Example Disable DC Current AutorangingExample Query the DC Current Autorange Mode CURRentDCRANGeAUTOCURRentDCRESolution? CURRentDCRESolutionDETectorBANDwidth Example Query the Detector Bandwidth DETectorBANDwidth?FREQuencyAPERture FREQuencyAPERture?Example Query the Measurement Range FREQuencyVOLTageRANGeFREQuencyVOLTageRANGe? Example Set the Voltage Range for Frequency Measurements toFREQuencyVOLTageRANGeAUTO? Example Disable AutorangingExample Query the Autorange Mode FREQuencyVOLTageRANGeAUTOFRESistanceAPERture? FRESistanceAPERtureExample Query the Integration Time FRESistanceNPLCFRESistanceNPLC? FRESistanceRANGe? FRESistanceRANGeFRESistanceRANGeAUTO? FRESistanceRANGeAUTORST Condition Fresres 1mΩ 1E-03 FRESistanceRESolutionFRESistanceRESolution? Example Query the ResolutionRST Condition 0.1 100ms Example Set the Aperture Time PERiodAPERturePERiodAPERture? Example Query the Period Voltage Range PERiodVOLTageRANGePERiodVOLTageRANGe? Example Set the Voltage Range for Period Measurements toPERiodVOLTageRANGeAUTO? PERiodVOLTageRANGeAUTORESistanceAPERture? RESistanceAPERtureRESistanceNPLC? RESistanceNPLCRST Condition Resrang 1kΩ Example Change the Range RESistanceRANGeRESistanceRANGe? RESistanceRANGeAUTO? RESistanceRANGeAUTOExample Change the Resolution RESistanceRESolutionRESistanceRESolution? VOLTageACRANGe? VOLTageACRANGeVOLTageACRANGeAUTO? Example Disable AC Voltage AutorangingVOLTageACRANGeAUTO RST Condition 1E-04 Example Change the Resolution VOLTageACRESolutionVOLTageACRESolution? VOLTageDCAPERture? VOLTageDCAPERtureVOLTageDCNPLC? VOLTageDCNPLCVOLTageDCRANGe? VOLTageDCRANGeVOLTageDCRANGeAUTO? VOLTageDCRANGeAUTOVOLTageDCRESolution? VOLTageDCRESolutionExample Query the Autozero Mode Example Disable AutozeroQUEStionableCONDition? PRESetQUEStionableENABle STATusQUEStionableEVENt? QUEStionableENABle?VERSion? ERRor?Example Reading the Error Queue SYSTemRST Condition Trigcoun Example Set the Trigger Count TRIGgerExample Query the Trigger Count DELayExample Set the Trigger Delay Example Disable Automatic Trigger Delay DELay?DELayAUTO Example Query the Trigger DelayExample Query the Trigger Delay Mode DELayAUTO?Example Set the Sample Source Related Commands INITiate, READ?, MEAS?SOURce Example Query the Trigger Source SOURce?Category Command Title Description Ieee 488.2 Common Command Quick ReferenceESE and *ESE? Example Enable All Error EventsESR? RST does not affect SRE and *SRE?STB? HP E1412A C-size 6½-Digit Multimeters Scpi Command Quick ReferenceData 67sMINMAX Zeroauto Offonceon DC Characteristics HP E1312A and HP E1412A Multimeter Specifications60 Hz 50 Hz Measuring CharacteristicsOperating Characteristics True RMS AC AC CharacteristicsTrue RMS AC Voltage System Speeds 10 Accuracy Specifications ±% of reading 1 Frequency and Period CharacteristicsConfiguration Rates 14/sec Autorange Time General Specifications Understanding the % of reading Error To Calculate Total Measurement ErrorTotal Measurement Error Number of Digits and Overrange Interpreting Multimeter SpecificationsAccuracy DC Voltage, DC Current, and Resistance Measurements Configuring for High Accuracy MeasurementsExecution Errors 123Numeric overflow 112Program mnemonic too long113Undefined header 121Invalid character in number211Trigger ignored To -168Block data errorsTo -178Expression errors 221Settings conflict440Query Unterminated after indefinite response 350Too many errors330Self-test failed Cannot use overload as math reference Cannot achieve requested resolutionInvalid secure code Cal signal measurement out of rangeCal signal frequency out of range Cal securedNo cal for this function or range HP E1312A and HP E1412A Multimeter Error Messages Appendix B Measurement Speed and Accuracy Trade-offs Measurement Speed and Accuracy Trade-offs Appendix C HP E1312A/E1412 Special Function Avoid Function Changes Avoid Aperture Changes Minimize Number Command Response SessionsGeneral Guidelines for Increasing Measurement Speed Decrease Aperture Time or NPLCs Set Autozero to Once or OFF Turn AutorangeINITFETCH? Setting the ResolutionIndex 197 Index 124 Index Index Error, 180 See online help Cycles, 27, 38, 123, 132, 140 Errors 130 Setting resolution, 15, 38 160 Index