CURRentAC?, MEASCURRAC? 1,MAX | HP WaterSkis E1312A specification

:CURRent:AC?

MEASure:CURRent:AC? [<range>MINMAXDEFAUTO

[,<resolution>MINMAXDEF]] selects the AC current function and allows you to specify the measurement range and resolution (see range versus resolution table at start of chapter).

Parameters


Parameter Name	Parameter Type	Range of Values	Default Units

<range>	numeric	1A3A	A
		MINMAXDEFAUTO

<resolution>	numeric	resolution	A
		MIN MAX DEF

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

•The AUTO or DEFault option for the range parameter enables autorange.

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

For range: MIN = 1A; MAX = 3A

For resolution: see Table 3-5 on page 71 for resolution choices.

•To select autorange, specify DEF for range or do not specify a value for the parameter. 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 the AUTO or DEFault parameter for the range parameter as MEAS:CURR:AC? 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:CURR:AC? DEF,MIN or

MEAS:CURR:AC? DEF,MAX (or use AUTO in place of DEF).

•Related Commands: FETCh?, INITiate, READ?

Example Making AC Current Measurements

MEAS:CURR:AC? 1,MAX	Function: AC Current; range selected: 1A;
	MAX resolution: 1.0E-04 A.

102 Multimeter Command Reference

Chapter 3

Image 102

HP WaterSkis E1312A, WaterSkis E1412A manual CURRentAC?, MEASCURRAC? 1,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 HP E1312A and HP E1412A Multimeter Module Setup Using This Chapter Setting the Module Address Switch Setting the Line Frequency Reference Interrupt PriorityChecking the Line Frequency Reference Page Switch Module Analog Bus Connections Multimeter Functional Connections Voltage Measurement Connections Wire Ohms Measurement Connections HP E1312A and HP E1412A Multimeter Module Setup Chapter Initial Operation Function Prototype HP E1312A and HP E1412A Multimeter Module Setup Chapter Thermal EMF Errors Measurement TutorialDC Voltage Measurements Loading Errors dc volts Leakage Current Errors Thermoelectric Voltages Rejecting Power Line Noise Voltages Common Mode Rejection CMR Noise Caused by Magnetic Loops Noise Caused by Ground Loops Wire Ohms Measurements Resistance Measurements Set to 2-wire ohms function Power Dissipation Effects Errors in High Resistance MeasurementsMaking High-Speed DC and Resistance Measurements DC Current Measurement Errors True RMS AC Measurements Crest Factor Errors non-sinusoidal inputs Common Crest Factors Example AC Measurements Below Full Scale Loading Errors ac voltsTemperature Coefficient Errors Function and Range Change Internal Offset Correction Low-Level Measurement Errors Voltage Measured = Vin2+ Noise2 AC Current Measurement Errors Frequency and Period Measurement ErrorsMaking High-Speed AC Voltage or Current Measurements Measurement Configuration AC Signal Filter DC Input Resistance Number of Power Line Cycles Nplc Resolution Chapter HP E1312A/E1412A Multimeter Application Information SENSeZEROAUTO Offonceon Math Operations CALCulate Subsystem Null Relative Function DB Measurements CONFfunction DBm 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 Bus Triggering Wait-for-Trigger State Checking 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 E1312A and HP E1412A Multimeter Application Examples HP VTL Software Visa MEASure Command Making Multimeter Measurements MEASURE1 Source Code File MEASURE2 Source Code File MEASURE3 Source Code File Init MEASURE4 Source Code File Synchronizing Multimeter With a Switch Module HP E1412A Multimeter and Switch Module Synchronization See -5 for the HP E1312A/E1412A Multimeter status system Check the multimeter for system errors Set up the MultimeterNow set up the switch module Retrieve the readings from the multimeter Multimeter Status System Examples Synchopc Source Code File RST CLS *ESE Init OPC Synchmav Source Code File RST Init FETC? End Loop Check the multimeter for system errors Limittst Source Code FileLoop Device Configuration Programming ExamplePage HP E1312A/E1412A Multimeter Application Information Chapter Command Types Common Command FormatCommand Format Command Abbreviated Commands Implied CommandsSeparator Linking Commands Parameters Multimeter Range and Resolution Tables PLC Scpi 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 AVERageMAXimum? AVERageAVERage?AVERageCOUNt? AVERageMINimum? DBMREFerence DBREFerenceDBREFerence? DBMREFerence? Parameter Summary Example FUNCtionFUNCtion? Example Query the Calculate Math Function LIMitUPPer LIMitLOWerLIMitLOWer? LIMitUPPer? STATe NULLOFFSetNULLOFFSet? STATe? LFRequency CALibrationCOUNt? Comments SECureCODE Example Query the Line Frequency SettingLFRequency? Example Enter a New Calibration Security Code STRing SECureSTATeSECureSTATe? Example Set the Calibration State to Unsecured VALue? STRing?VALue Example Query the Calibration Message Zeroauto CALibration? CAL? CONFigure Command Setting Default Settings for CONFigure Command by Function Function Range Resolution CURRentAC Example Making AC Current Measurements CURRentDC Example Making DC Current Measurements ResolutionMINMAXDEF selects the frequency function Example Making 4-Wire Ohms Measurements FRESistance PERiod Resolution Minmaxdef Example Making 2-Wire Ohms Measurements VOLTageAC Example Making AC Voltage Measurements VOLTageDC Example Making DC Voltage Measurements VOLTageDCRATio Sense HI and LO input CONFigure? String Returned Data POINts? FETCh? Example Transferring Stored Readings to Output Buffer INITiate IMMediateExample Placing Multimeter in Wait-For-Trigger State IMPedanceAUTO Example Query the Input Impedance ModeINPut IMPedanceAUTO? MEASure CURRentAC? MEASCURRAC? 1,MAX CURRentDC? MEASCURRDC? .1,MAX FREQuency? FRESistance? MEASFRES? 1500,MAX PERiod? RESistance? VOLTageAC? VOLTageDC? VOLTageDCRATio? Example Making DC Voltage Ratio Measurements OUTPut TTLTrgSTATeRST Condition OUTPTTLTn OFF TTLTrgSTATe? Example Route Voltmeter Complete to Trigger LineExample Query Voltmeter Complete Destination READ? Example Transfer Readings Directly to Output Buffer SAMPle COUNtRST Condition Sampcoun Example Set the Sample Count Example Query the Sample Count SAMPCOUN? SENSe Zero Auto Offonceon AUTO? Example Query the Measurement Function Function CURRentACRANGe CURRentACRANGe?Example Query the AC Current Measurement Range CURRentACRANGeAUTO Example Disable AC Current AutorangingExample Query the AC Current Autorange Mode CURRentACRANGeAUTO? CURRentACRESolution CURRentACRESolution? Example Set an Aperture Time of 16.7ms CURRentDCAPERtureCURRentDCAPERture? Example Query the Aperture Time CURRentDCNPLC CURRentDCNPLC?Example Query the DC Current Integration Time Example Set the DC Current Range to 3A CURRentDCRANGeCURRentDCRANGe? Example Query the DC Current Measurement Range CURRentDCRANGeAUTO Example Disable DC Current AutorangingExample Query the DC Current Autorange Mode CURRentDCRANGeAUTO? CURRentDCRESolution CURRentDCRESolution? DETectorBANDwidth FREQuencyAPERture? DETectorBANDwidth?FREQuencyAPERture Example Query the Detector Bandwidth Example Set the Voltage Range for Frequency Measurements to FREQuencyVOLTageRANGeFREQuencyVOLTageRANGe? Example Query the Measurement Range FREQuencyVOLTageRANGeAUTO Example Disable AutorangingExample Query the Autorange Mode FREQuencyVOLTageRANGeAUTO? FRESistanceAPERture FRESistanceAPERture? FRESistanceNPLC FRESistanceNPLC?Example Query the Integration Time FRESistanceRANGe FRESistanceRANGe? FRESistanceRANGeAUTO FRESistanceRANGeAUTO? Example Query the Resolution FRESistanceRESolutionFRESistanceRESolution? RST Condition Fresres 1mΩ 1E-03 PERiodAPERture PERiodAPERture?RST Condition 0.1 100ms Example Set the Aperture Time Example Set the Voltage Range for Period Measurements to PERiodVOLTageRANGePERiodVOLTageRANGe? Example Query the Period Voltage Range PERiodVOLTageRANGeAUTO PERiodVOLTageRANGeAUTO? RESistanceAPERture RESistanceAPERture? RESistanceNPLC RESistanceNPLC? RESistanceRANGe RESistanceRANGe?RST Condition Resrang 1kΩ Example Change the Range RESistanceRANGeAUTO RESistanceRANGeAUTO? RESistanceRESolution RESistanceRESolution?Example Change the Resolution VOLTageACRANGe VOLTageACRANGe? Example Disable AC Voltage Autoranging VOLTageACRANGeAUTOVOLTageACRANGeAUTO? VOLTageACRESolution VOLTageACRESolution?RST Condition 1E-04 Example Change the Resolution VOLTageDCAPERture VOLTageDCAPERture? VOLTageDCNPLC VOLTageDCNPLC? VOLTageDCRANGe VOLTageDCRANGe? VOLTageDCRANGeAUTO VOLTageDCRANGeAUTO? VOLTageDCRESolution VOLTageDCRESolution? Example Disable Autozero Example Query the Autozero Mode STATus PRESetQUEStionableENABle QUEStionableCONDition? QUEStionableENABle? QUEStionableEVENt? SYSTem ERRor?Example Reading the Error Queue VERSion? TRIGger RST Condition Trigcoun Example Set the Trigger Count DELay Example Set the Trigger DelayExample Query the Trigger Count Example Query the Trigger Delay DELay?DELayAUTO Example Disable Automatic Trigger Delay DELayAUTO? Example Query the Trigger Delay Mode Related Commands INITiate, READ?, MEAS? SOURceExample Set the Sample Source SOURce? Example Query the Trigger Source Ieee 488.2 Common Command Quick Reference Category Command Title Description Example Enable All Error Events ESE and *ESE? ESR? SRE and *SRE? RST does not affect STB? Scpi Command Quick Reference HP E1412A C-size 6½-Digit Multimeters Data 67sMINMAX Zeroauto Offonceon HP E1312A and HP E1412A Multimeter Specifications DC Characteristics Measuring Characteristics 60 Hz 50 Hz Operating Characteristics AC Characteristics True RMS AC True RMS AC Voltage System Speeds 10 Frequency and Period Characteristics Accuracy Specifications ±% of reading 1 Configuration Rates 14/sec Autorange Time General Specifications To Calculate Total Measurement Error Understanding the % of reading Error Total Measurement Error Interpreting Multimeter Specifications Number of Digits and Overrange Accuracy Configuring for High Accuracy Measurements DC Voltage, DC Current, and Resistance Measurements Execution Errors 121Invalid character in number 112Program mnemonic too long113Undefined header 123Numeric overflow 221Settings conflict To -168Block data errorsTo -178Expression errors 211Trigger ignored 350Too many errors 330Self-test failed440Query Unterminated after indefinite response Cannot achieve requested resolution Cannot use overload as math reference Cal secured Cal signal measurement out of rangeCal signal frequency out of range Invalid secure code 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 Minimize Number Command Response Sessions General Guidelines for Increasing Measurement SpeedAvoid Function Changes Avoid Aperture Changes Set Autozero to Once or OFF Turn Autorange Decrease Aperture Time or NPLCs Setting the Resolution INITFETCH? 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