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HP WaterSkis E1412A, WaterSkis E1312A manual FRESistance?, MEASFRES? 1500,MAX

Models: WaterSkis E1412A WaterSkis E1312A

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Page 105

:FRESistance?

MEASure:FRESistance? [<range>MINMAXDEFAUTO

[,<resolution>MINMAXDEF]] selects the 4-wire ohms function and allows you to specify the measurement range and resolution.

Parameters


Parameter Name	Parameter Type	Range of Values	Default Units

<range>	numeric	100Ω1kΩ10kΩ100kΩ1MΩ	ohms
		10MΩ100MΩ
		MINMAXDEFAUTO

<resolution>	numeric	resolutionMINMAXDEF	ohms

Comments • To select a standard measurement range, specify range as the input signal’s maximum expected resistance. The multimeter then selects the correct range that will accept the input.

•The AUTO or DEFault option for the range parameter enables autorange. The DEF option for the resolution parameter defaults the integration time to 10 PLC.

•The MIN and MAX parameters select the minimum or maximum values for range and resolution:

For range: MIN = 100 Ω; MAX =100MΩ

For resolution: MIN selects the best resolution (the smallest value) for the selected range. MAX selects the worst resolution (the largest value) for the selected range.

•To select autorange, specify AUTO or DEF for range or do not specify a value for the range and resolution parameters. In the autorange mode, the multimeter samples the input signal before each measurement and selects the appropriate range.

•To specify a MIN or MAX resolution while autoranging, you must specify MEAS:FRES? DEF (you cannot omit the range parameter). This prevents the MIN or MAX resolution from being interpreted as a range setting and the resulting command becomes MEAS:FRES? DEF,MIN or

MEAS:FRES? DEF,MAX.

•Related Commands: FETCh?, INITiate, READ?

Example Making 4-Wire Ohms Measurements

MEAS:FRES? 1500,MAX	Function: 4-wire ohms; range selected: 10kW;
	MAX resolution: 1 Ω.

Chapter 3

Multimeter Command Reference 105

Image 105

HP WaterSkis E1412A, WaterSkis E1312A manual FRESistance?, MEASFRES? 1500,MAX

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 Setting the Line Frequency Reference Interrupt PriorityChecking the Line Frequency Reference 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 Thermal EMF Errors Measurement TutorialDC Voltage Measurements 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 Power Dissipation Effects Errors in High Resistance MeasurementsMaking High-Speed DC and Resistance Measurements True RMS AC Measurements DC Current Measurement ErrorsCommon Crest Factors Example Crest Factor Errors non-sinusoidal inputsTemperature Coefficient Errors Loading Errors ac voltsAC Measurements Below Full Scale Function and Range Change Internal Offset CorrectionVoltage Measured = Vin2+ Noise2 Low-Level Measurement ErrorsAC Current Measurement Errors Frequency and Period Measurement ErrorsMaking High-Speed AC Voltage or Current Measurements 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 MeasurementsDBm Measurements Storing the dB Reference ValueStoring 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 TriggeringChecking the Trigger Count Inserting a Trigger Delay Example Setting the Trigger CountExample Inserting a Trigger Delay Default Trigger Delays Querying Delay Time Sample Count Example Setting the Sample CountChecking 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 Now set up the switch module Set up the MultimeterCheck the multimeter for system errors Retrieve the readings from the multimeterMultimeter Status System Examples RST CLS *ESE Init OPC Synchopc Source Code FileRST Init FETC? Synchmav Source Code FileEnd Loop Check the multimeter for system errors Limittst Source Code FileLoop Programming Example Device ConfigurationPage HP E1312A/E1412A Multimeter Application Information Chapter Command Types Common Command FormatCommand Format Command Abbreviated Commands Implied CommandsSeparator Parameters Linking CommandsPLC Multimeter Range and Resolution TablesScpi Command Reference AC Voltage Range versus ResolutionAC Current Range versus Resolution Related Commands INITiate, TRIGger ABORtAborting a Measurement CALCulate Subsystem SyntaxValid Math/Measurement Function Combinations AVERageCOUNt? AVERageAVERage?AVERageMAXimum? AVERageMINimum?DBREFerence? DBREFerenceDBMREFerence DBMREFerence?FUNCtion? FUNCtionParameter Summary Example Example Query the Calculate Math FunctionLIMitLOWer? LIMitLOWerLIMitUPPer LIMitUPPer?NULLOFFSet? NULLOFFSetSTATe STATe?COUNt? CALibrationLFRequency CommentsLFRequency? Example Query the Line Frequency SettingSECureCODE Example Enter a New Calibration Security CodeSECureSTATe? SECureSTATeSTRing Example Set the Calibration State to UnsecuredVALue STRing?VALue? Example Query the Calibration MessageZeroauto 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?INITiate IMMediateExample Placing Multimeter in Wait-For-Trigger State INPut Example Query the Input Impedance ModeIMPedanceAUTO 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?OUTPut TTLTrgSTATeRST Condition OUTPTTLTn OFF TTLTrgSTATe? Example Route Voltmeter Complete to Trigger LineExample Query Voltmeter Complete Destination Example Transfer Readings Directly to Output Buffer READ?SAMPle COUNtRST Condition Sampcoun Example Set the Sample Count SAMPCOUN? Example Query the Sample CountSENSe Zero Auto Offonceon AUTO? Function Example Query the Measurement FunctionCURRentACRANGe CURRentACRANGe?Example Query the AC Current Measurement Range Example Query the AC Current Autorange Mode Example Disable AC Current AutorangingCURRentACRANGeAUTO CURRentACRANGeAUTO?CURRentACRESolution? CURRentACRESolutionCURRentDCAPERture? CURRentDCAPERtureExample Set an Aperture Time of 16.7ms Example Query the Aperture TimeCURRentDCNPLC CURRentDCNPLC?Example Query the DC Current Integration Time CURRentDCRANGe? CURRentDCRANGeExample Set the DC Current Range to 3A Example Query the DC Current Measurement RangeExample Query the DC Current Autorange Mode Example Disable DC Current AutorangingCURRentDCRANGeAUTO CURRentDCRANGeAUTO?CURRentDCRESolution? CURRentDCRESolutionDETectorBANDwidth FREQuencyAPERture DETectorBANDwidth?FREQuencyAPERture? Example Query the Detector BandwidthFREQuencyVOLTageRANGe? FREQuencyVOLTageRANGeExample Set the Voltage Range for Frequency Measurements to Example Query the Measurement RangeExample Query the Autorange Mode Example Disable AutorangingFREQuencyVOLTageRANGeAUTO FREQuencyVOLTageRANGeAUTO?FRESistanceAPERture? FRESistanceAPERtureFRESistanceNPLC FRESistanceNPLC?Example Query the Integration Time FRESistanceRANGe? FRESistanceRANGeFRESistanceRANGeAUTO? FRESistanceRANGeAUTOFRESistanceRESolution? FRESistanceRESolutionExample Query the Resolution RST Condition Fresres 1mΩ 1E-03PERiodAPERture PERiodAPERture?RST Condition 0.1 100ms Example Set the Aperture Time PERiodVOLTageRANGe? PERiodVOLTageRANGeExample Set the Voltage Range for Period Measurements to Example Query the Period Voltage RangePERiodVOLTageRANGeAUTO? PERiodVOLTageRANGeAUTORESistanceAPERture? RESistanceAPERtureRESistanceNPLC? RESistanceNPLCRESistanceRANGe RESistanceRANGe?RST Condition Resrang 1kΩ Example Change the Range RESistanceRANGeAUTO? RESistanceRANGeAUTORESistanceRESolution RESistanceRESolution?Example Change the Resolution VOLTageACRANGe? VOLTageACRANGeExample Disable AC Voltage Autoranging VOLTageACRANGeAUTOVOLTageACRANGeAUTO? VOLTageACRESolution VOLTageACRESolution?RST Condition 1E-04 Example Change the Resolution VOLTageDCAPERture? VOLTageDCAPERtureVOLTageDCNPLC? VOLTageDCNPLCVOLTageDCRANGe? VOLTageDCRANGeVOLTageDCRANGeAUTO? VOLTageDCRANGeAUTOVOLTageDCRESolution? VOLTageDCRESolutionExample Query the Autozero Mode Example Disable AutozeroQUEStionableENABle PRESetSTATus QUEStionableCONDition?QUEStionableEVENt? QUEStionableENABle?Example Reading the Error Queue ERRor?SYSTem VERSion?RST Condition Trigcoun Example Set the Trigger Count TRIGgerDELay Example Set the Trigger DelayExample Query the Trigger Count DELayAUTO DELay?Example Query the Trigger Delay Example Disable Automatic Trigger DelayExample Query the Trigger Delay Mode DELayAUTO?Related Commands INITiate, READ?, MEAS? SOURceExample Set the Sample 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 113Undefined header 112Program mnemonic too long121Invalid character in number 123Numeric overflowTo -178Expression errors To -168Block data errors221Settings conflict 211Trigger ignored350Too many errors 330Self-test failed440Query Unterminated after indefinite response Cannot use overload as math reference Cannot achieve requested resolutionCal signal frequency out of range Cal signal measurement out of rangeCal secured Invalid secure codeNo 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 Minimize Number Command Response Sessions General Guidelines for Increasing Measurement SpeedAvoid Function Changes Avoid Aperture Changes 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