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HP WaterSkis E1412A, WaterSkis E1312A manual True RMS AC Voltage

Models: WaterSkis E1412A WaterSkis E1312A

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Page 175

AC Characteristics (continued)

Measuring Characteristics

Measurement Noise Rejection [7]

AC CMRR

70 dB

True RMS AC Voltage

Measurement Method: AC-coupled True RMS - measures the ac component of the input with up to 300Vdc of bias on any range (max AC + DC = 300Vrms).

Crest Factor:	Maximum 5:1 at full scale
AC Filter Bandwidths:	3Hz-300kHz (Slow filter)
	20Hz-300kHz (Medium filter)
	200Hz-300kHz (Fast filter)
Input Impedance:	1MΩ ± 2%, in parallel with 100pF
Input Protection:	300Vrms all ranges

True RMS AC Current

Measurement Method: Direct coupled to the fuse and shunt. AC-coupled True RMS measurement (measures the ac component only).

Shunt Resistor:	0.1 Ω for 1A and 3A ranges
Burden Voltage:	1A range: <1Vrms
	3A range: < 2Vrms
Input Protection:	Externally accessible 3.15A, 250V, Class H fuse
	Class H fuses are fuses with a high interrupt rating which defines a fuse’s ability
	to safely interrupt and clear short circuits. Replace the fuse with HP part number
	2110-0957, (3.15A, 250V, 5.0 mm diameter, 20.0 mm long) or use Cooper Industries
	Inc. fuse part number GDA-3.15.

Appendix A

HP E1312A and HP E1412A Multimeter Specifications 175

Image 175

HP WaterSkis E1412A, WaterSkis E1312A manual True RMS AC Voltage

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 Interrupt Priority Setting the Line Frequency ReferenceChecking 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 Measurement Tutorial Thermal EMF ErrorsDC 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 Errors in High Resistance Measurements Power Dissipation EffectsMaking High-Speed DC and 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 ErrorsFrequency and Period Measurement Errors AC Current 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 MeasurementsStoring 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 TriggeringExample 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 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 FileLimittst 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 CommandsPLC Multimeter Range and Resolution TablesAC 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? 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?IMMediate INITiateExample Placing Multimeter in Wait-For-Trigger State 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?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 CountSENSe Zero Auto Offonceon AUTO? Function Example Query the Measurement FunctionCURRentACRANGe? CURRentACRANGeExample Query the AC Current Measurement Range 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 16.7msCURRentDCNPLC? CURRentDCNPLCExample Query the DC Current Integration Time 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? FRESistanceAPERtureFRESistanceNPLC? FRESistanceNPLCExample Query the Integration Time FRESistanceRANGe? FRESistanceRANGeFRESistanceRANGeAUTO? FRESistanceRANGeAUTORST Condition Fresres 1mΩ 1E-03 FRESistanceRESolutionFRESistanceRESolution? Example Query the ResolutionPERiodAPERture? 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 toPERiodVOLTageRANGeAUTO? PERiodVOLTageRANGeAUTORESistanceAPERture? RESistanceAPERtureRESistanceNPLC? RESistanceNPLCRESistanceRANGe? RESistanceRANGeRST Condition Resrang 1kΩ Example Change the Range RESistanceRANGeAUTO? RESistanceRANGeAUTORESistanceRESolution? RESistanceRESolutionExample Change the Resolution VOLTageACRANGe? VOLTageACRANGeVOLTageACRANGeAUTO Example Disable AC Voltage AutorangingVOLTageACRANGeAUTO? VOLTageACRESolution? VOLTageACRESolutionRST Condition 1E-04 Example Change the Resolution 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 Set the Trigger Delay DELayExample Query the Trigger Count Example Disable Automatic Trigger Delay DELay?DELayAUTO Example Query the Trigger DelayExample 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 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 conflict330Self-test failed 350Too many errors440Query Unterminated after indefinite response 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 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 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