RESistanceAPERture? | HP WaterSkis E1412A, WaterSkis E1312A guide

RESistance:APERture

[SENSe:]RESistance:APERture <number> sets the integration time in seconds for 2-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 RES:APER command overrides the results of previously executed

RES:NPLC and RESistance:RESolution 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: RES:APER 0.166667 seconds (60Hz) or RES:APER 0.20000 (50Hz)

Example Set an Aperture Time of 16.7ms

RES:APER 16.7E-03

Aperture time is 16.7ms.

RESistance:APERture?

[SENSe:]RESistance: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 (.333 ms) if MIN is specified.

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

Example Query the Aperture Time

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

Chapter 3

Multimeter Command Reference 139

Image 139

HP WaterSkis E1412A, WaterSkis E1312A manual RESistanceAPERture?

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 Setup Setting the Module Address Switch Interrupt Priority Setting the Line Frequency ReferenceChecking the Line Frequency Reference Page Multimeter Functional Connections Switch Module Analog Bus Connections Voltage Measurement Connections Wire Ohms Measurement Connections Initial Operation HP E1312A and HP E1412A Multimeter Module Setup Chapter Function Prototype HP E1312A and HP E1412A Multimeter Module Setup Chapter Measurement Tutorial Thermal EMF ErrorsDC Voltage Measurements Thermoelectric Voltages Loading Errors dc volts Leakage Current Errors Common Mode Rejection CMR Rejecting Power Line Noise Voltages Noise Caused by Ground Loops Noise Caused by Magnetic Loops Resistance Measurements Wire Ohms Measurements Set to 2-wire ohms function Errors in High Resistance Measurements Power Dissipation EffectsMaking High-Speed DC and Resistance Measurements True RMS AC Measurements DC Current Measurement Errors Common Crest Factors Example Crest Factor Errors non-sinusoidal inputs Function and Range Change Internal Offset Correction Loading Errors ac voltsTemperature Coefficient Errors AC Measurements Below Full Scale Voltage Measured = Vin2+ Noise2 Low-Level Measurement Errors Frequency and Period Measurement Errors AC Current Measurement ErrorsMaking High-Speed AC Voltage or Current Measurements AC Signal Filter DC Input Resistance Measurement Configuration Number of Power Line Cycles Nplc Resolution Chapter HP E1312A/E1412A Multimeter Application Information SENSeZEROAUTO Offonceon Null Relative Function Math Operations CALCulate Subsystem CONFfunction DB Measurements Storing the dB Reference Value DBm MeasurementsStoring the dBm Reference Resistance Value HP E1312A/E1412A Multimeter Application Information Chapter Triggering the Multimeter TRIGgerSOURce EXTernal Checking the Trigger Source Wait-for-Trigger State Bus Triggering Example Setting the Trigger Count Checking the Trigger Count Inserting a Trigger DelayExample Inserting a Trigger Delay Default Trigger Delays Example Setting the Sample Count Querying Delay Time Sample CountChecking the Sample Count HP VTL Software Visa HP E1312A and HP E1412A Multimeter Application Examples Making Multimeter Measurements MEASure Command MEASURE2 Source Code File MEASURE1 Source Code File Init MEASURE3 Source Code File MEASURE4 Source Code File HP E1412A Multimeter and Switch Module Synchronization Synchronizing Multimeter With a Switch Module See -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 errors Multimeter Status System Examples RST CLS *ESE Init OPC Synchopc Source Code File RST Init FETC? Synchmav Source Code File Limittst Source Code File End Loop Check the multimeter for system errorsLoop Programming Example Device ConfigurationPage HP E1312A/E1412A Multimeter Application Information Chapter Common Command Format Command TypesCommand Format Abbreviated Commands Implied Commands CommandSeparator Parameters Linking Commands PLC Multimeter Range and Resolution Tables AC Voltage Range versus Resolution Scpi Command ReferenceAC Current Range versus Resolution ABORt Related Commands INITiate, TRIGgerAborting a Measurement Subsystem Syntax CALCulateValid Math/Measurement Function Combinations AVERageMINimum? AVERageAVERage?AVERageCOUNt? AVERageMAXimum? DBMREFerence? DBREFerenceDBREFerence? DBMREFerence Example Query the Calculate Math Function FUNCtionFUNCtion? Parameter Summary Example LIMitUPPer? LIMitLOWerLIMitLOWer? LIMitUPPer STATe? NULLOFFSetNULLOFFSet? STATe Comments CALibrationCOUNt? LFRequency Example Enter a New Calibration Security Code Example Query the Line Frequency SettingLFRequency? SECureCODE Example Set the Calibration State to Unsecured SECureSTATeSECureSTATe? STRing Example Query the Calibration Message STRing?VALue VALue? Zeroauto CAL? CALibration? Command Setting CONFigure Function Range Resolution Default Settings for CONFigure Command by Function Example Making AC Current Measurements CURRentAC Example Making DC Current Measurements CURRentDC ResolutionMINMAXDEF selects the frequency function FRESistance Example Making 4-Wire Ohms Measurements PERiod Example Making 2-Wire Ohms Measurements Resolution Minmaxdef Example Making AC Voltage Measurements VOLTageAC Example Making DC Voltage Measurements VOLTageDC Sense HI and LO input VOLTageDCRATio String Returned CONFigure? POINts? Data Example Transferring Stored Readings to Output Buffer FETCh? IMMediate INITiateExample Placing Multimeter in Wait-For-Trigger State IMPedanceAUTO? Example Query the Input Impedance ModeINPut IMPedanceAUTO MEASure MEASCURRAC? 1,MAX CURRentAC? MEASCURRDC? .1,MAX CURRentDC? FREQuency? MEASFRES? 1500,MAX FRESistance? PERiod? RESistance? VOLTageAC? VOLTageDC? Example Making DC Voltage Ratio Measurements VOLTageDCRATio? TTLTrgSTATe OUTPutRST Condition OUTPTTLTn OFF Example Route Voltmeter Complete to Trigger Line TTLTrgSTATe?Example Query Voltmeter Complete Destination Example Transfer Readings Directly to Output Buffer READ? COUNt SAMPleRST Condition Sampcoun Example Set the Sample Count SAMPCOUN? Example Query the Sample Count SENSe Zero Auto Offonceon AUTO? Function Example Query the Measurement Function CURRentACRANGe? CURRentACRANGeExample Query the AC Current Measurement Range CURRentACRANGeAUTO? Example Disable AC Current AutorangingExample Query the AC Current Autorange Mode CURRentACRANGeAUTO CURRentACRESolution? CURRentACRESolution Example Query the Aperture Time CURRentDCAPERtureCURRentDCAPERture? Example Set an Aperture Time of 16.7ms CURRentDCNPLC? CURRentDCNPLCExample Query the DC Current Integration Time Example Query the DC Current Measurement Range CURRentDCRANGeCURRentDCRANGe? Example Set the DC Current Range to 3A CURRentDCRANGeAUTO? Example Disable DC Current AutorangingExample Query the DC Current Autorange Mode CURRentDCRANGeAUTO CURRentDCRESolution? CURRentDCRESolution DETectorBANDwidth Example Query the Detector Bandwidth DETectorBANDwidth?FREQuencyAPERture FREQuencyAPERture? Example Query the Measurement Range FREQuencyVOLTageRANGeFREQuencyVOLTageRANGe? Example Set the Voltage Range for Frequency Measurements to FREQuencyVOLTageRANGeAUTO? Example Disable AutorangingExample Query the Autorange Mode FREQuencyVOLTageRANGeAUTO FRESistanceAPERture? FRESistanceAPERture FRESistanceNPLC? FRESistanceNPLCExample Query the Integration Time FRESistanceRANGe? FRESistanceRANGe FRESistanceRANGeAUTO? FRESistanceRANGeAUTO RST Condition Fresres 1mΩ 1E-03 FRESistanceRESolutionFRESistanceRESolution? Example Query the Resolution PERiodAPERture? PERiodAPERtureRST Condition 0.1 100ms Example Set the Aperture Time Example Query the Period Voltage Range PERiodVOLTageRANGePERiodVOLTageRANGe? Example Set the Voltage Range for Period Measurements to PERiodVOLTageRANGeAUTO? PERiodVOLTageRANGeAUTO RESistanceAPERture? RESistanceAPERture RESistanceNPLC? RESistanceNPLC RESistanceRANGe? RESistanceRANGeRST Condition Resrang 1kΩ Example Change the Range RESistanceRANGeAUTO? RESistanceRANGeAUTO RESistanceRESolution? RESistanceRESolutionExample Change the Resolution VOLTageACRANGe? VOLTageACRANGe VOLTageACRANGeAUTO Example Disable AC Voltage AutorangingVOLTageACRANGeAUTO? VOLTageACRESolution? VOLTageACRESolutionRST Condition 1E-04 Example Change the Resolution VOLTageDCAPERture? VOLTageDCAPERture VOLTageDCNPLC? VOLTageDCNPLC VOLTageDCRANGe? VOLTageDCRANGe VOLTageDCRANGeAUTO? VOLTageDCRANGeAUTO VOLTageDCRESolution? VOLTageDCRESolution Example Query the Autozero Mode Example Disable Autozero QUEStionableCONDition? PRESetQUEStionableENABle STATus QUEStionableEVENt? QUEStionableENABle? VERSion? ERRor?Example Reading the Error Queue SYSTem RST Condition Trigcoun Example Set the Trigger Count TRIGger Example Set the Trigger Delay DELayExample Query the Trigger Count Example Disable Automatic Trigger Delay DELay?DELayAUTO Example Query the Trigger Delay Example Query the Trigger Delay Mode DELayAUTO? SOURce Related Commands INITiate, READ?, MEAS?Example Set the Sample Source Example Query the Trigger Source SOURce? Category Command Title Description Ieee 488.2 Common Command Quick Reference ESE and *ESE? Example Enable All Error Events ESR? RST does not affect SRE and *SRE? STB? HP E1412A C-size 6½-Digit Multimeters Scpi Command Quick Reference Data 67sMINMAX Zeroauto Offonceon DC Characteristics HP E1312A and HP E1412A Multimeter Specifications 60 Hz 50 Hz Measuring Characteristics Operating Characteristics True RMS AC AC Characteristics True RMS AC Voltage System Speeds 10 Accuracy Specifications ±% of reading 1 Frequency and Period Characteristics Configuration Rates 14/sec Autorange Time General Specifications Understanding the % of reading Error To Calculate Total Measurement Error Total Measurement Error Number of Digits and Overrange Interpreting Multimeter Specifications Accuracy DC Voltage, DC Current, and Resistance Measurements Configuring for High Accuracy Measurements Execution Errors 123Numeric overflow 112Program mnemonic too long113Undefined header 121Invalid character in number 211Trigger ignored To -168Block data errorsTo -178Expression errors 221Settings conflict 330Self-test failed 350Too many errors440Query Unterminated after indefinite response Cannot use overload as math reference Cannot achieve requested resolution Invalid secure code Cal signal measurement out of rangeCal signal frequency out of range Cal secured No 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 General Guidelines for Increasing Measurement Speed Minimize Number Command Response SessionsAvoid Function Changes Avoid Aperture Changes Decrease Aperture Time or NPLCs Set Autozero to Once or OFF Turn Autorange INITFETCH? Setting the Resolution Index 197 Index 124 Index Index Error, 180 See online help Cycles, 27, 38, 123, 132, 140 Errors 130 Setting resolution, 15, 38 160 Index