Display Annunciators, Key as you | Agilent Technologies 34401A

Display Annunciators

∗

Adrs

Rmt

Man

Trig

Hold

Mem

Ratio

Math

ERROR Rear Shift 4W

Turns on during a measurement.

Multimeter is addressed to listen or talk over the GPIB interface. Multimeter is in remote mode (remote interface).

Multimeter is using manual ranging (autorange is disabled). Multimeter is waiting for a single trigger or external trigger. Reading Hold is enabled.

Turns on when reading memory is enabled. Multimeter is in dcv:dcv ratio function.

A math operation is enabled (null, min-max, dB, dBm, or limit test). Hardware or remote interface command errors are detected.

Rear input terminals are selected.

“Shift” key has been pressedPress. “Shift” again to turn off. Multimeter is in 4-wire ohms function.

Multimeter is in continuity test function. Multimeter is in diode test function.

To review the display annunciators, hold down the turn on the multimeter.

Shift

key as you

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Agilent Technologies 34401A Display Annunciators, Key as you, Adrs Rmt Man Trig Hold Mem Ratio Math Error Rear Shift 4W

34401A specifications

Agilent Technologies 34401A is a highly reputable digital multimeter (DMM), renowned for its accuracy, versatility, and performance in a wide range of measurement applications. First introduced in the early 1990s, the 34401A has become a staple in laboratories, manufacturing environments, and educational institutions due to its robust build and comprehensive features.

One of the standout characteristics of the 34401A is its impressive accuracy, boasting a basic DC voltage accuracy of 0.0035%, making it ideal for precise measurements in electronic testing. The multimeter offers a wide range of measurement capabilities, including voltage (DC and AC), current (DC and AC), resistance, frequency, and continuity test, making it a highly versatile tool for engineers and technicians.

The 34401A utilizes a 6½-digit resolution, enabling the user to measure small changes in electrical signals with remarkable precision. With a sampling rate of up to 1000 readings per second, it can handle dynamic test requirements, providing timely results without sacrificing measurement integrity.

In terms of connectivity, the Agilent 34401A includes a GPIB (General Purpose Interface Bus) for remote operation, allowing users to automate their testing processes and integrate the multimeter easily into larger measurement systems. This feature is particularly beneficial in automated test environments, where speed and accuracy are paramount.

Additionally, the DMM incorporates advanced measurement functions, such as statistical analysis, including mean, standard deviation, and minimum/maximum readings, which provide users with valuable insights into their data. The instrument's user-friendly interface, complete with a clear digital display and intuitive controls, enhances usability and ensures that users can easily navigate its various functions.

Robust software support further extends the capabilities of the Agilent 34401A. It is compatible with a range of software tools for data logging and analysis, enabling users to efficiently document and analyze their measurements over time.

In summary, Agilent Technologies 34401A stands out in the realm of digital multimeters due to its high accuracy, extensive measurement functionalities, and user-friendly features. Whether for research and development, quality control, or educational purposes, the 34401A remains a preferred choice for professionals demanding reliable and precise measurement solutions. Its enduring legacy in the industry speaks to its performance and reliability, making it an essential tool for anyone involved in electronic testing and measurement.

Contents

Agilent 34401A ½ Digit Multimeter U T I O N WA RN I N G Safety Information Protection Limits Additional Notices Declaration of Conformity Convenient Bench-Top Features Flexible System Features Front Panel at a Glance Menu Operation keys SYStem Menu Front-Panel Menu at a GlanceTRIGger Menu Input / Output Menu Display Annunciators Adrs Rmt Man Trig Hold Mem Ratio Math Error Rear Shift 4WKey as you Rear Panel at a Glance Use the front-panel Input / Output Menu to This Book Contents Contents Remote Interface Reference Error MessagesApplication Programs Measurement Tutorial SpecificationsIndex Declaration of Conformity Quick Start Quick Start To Prepare the Multimeter for Use Connect the power cord and turn on the multimeterTo Prepare the Multimeter for Use Check the list of supplied items Verify that the power-line fuse is good Verify that there is ac power to the multimeterVerify the power-line voltage setting If the Multimeter Does Not Turn On Replace the fuse-holder assembly in the rear panel To Adjust the Carrying Handle To Adjust the Carrying HandleBench-top viewing positions Carrying position To Measure Resistance To Measure VoltageTo Measure Voltage To Measure Frequency or Period To Measure CurrentTo Measure Current To Check Diodes To Test ContinuityTo Test Continuity To Select a Range To Select a Range To Set the Resolution To Set the Resolution Front-Panel Display Formats To Rack Mount the Multimeter To Rack Mount the Multimeter Quick Start Front-Panel Menu Operation Front-Panel Menu Operation Front-Panel Menu Reference Front-Panel Menu Reference Front-Panel Menu Reference SYStem Menu Secured Front-Panel Menu Tutorial Front-Panel Menu Tutorial Messages Displayed During Menu USE Menu Bottom You pressed Turn on the menu Move across to the SYS Menu choice on this level Move down a level to the Beep parameter choices Move across to the Beep command on the commands levelSave the change and turn off the menu Move down to the Beep parameter choices Use menu recall to return to the Beep commandMove across to the on choice Math Menu Make the number negative Move down to edit the Null Value parameterIncrement the first digit until 2 is displayed Increase the displayed number by a factor To Turn Off the Comma Separator Move down a level and then across to the Comma commandTo Turn Off the Comma Separator Move across to the SYS Menu choice on the menus level To Make Null Relative Measurements To Make Null Relative MeasurementsResult = reading null value To Store Minimum and Maximum Readings To Store Minimum and Maximum Readings To Make dB Measurements To Make dB MeasurementsDB = reading in dBm relative value in dBm To Make dBm Measurements To Make dBm MeasurementsDBm = 10 ⋅ Log10 reading2 / reference resistance / 1 mW To Trigger the Multimeter To Trigger the Multimeter To Use Reading Hold To Use Reading Hold To Make dcvdcv Ratio Measurements To Make dcvdcv Ratio Measurements Meas Menu Move down a level and then across to the Ratio Func commandMove down to the parameter level To Use Reading Memory Select the single trigger modeMove down to a level to the Rdgs Store command To Use Reading Memory This takes you to the Saved Rdgs command in the SYS Menu Move across to view the two remaining stored readings Move down a level to view the first stored readingTurn off the menu Features and Functions Features and Functions Math Operations, starting on Triggering, starting on Measurement Configuration Measurement ConfigurationAC Signal Filter Applies to ac voltage and ac current measurements only Continuity Threshold Resistance See also To Test Continuity, on DC Input Resistance Input R Meas Menu Resolution Resolution Choices Integration Time This is the 10 Vdc range, 51⁄2 digits are displayed Remote Interface Operation You can set the resolution using Resolution setting. The default mode is 5 digits slowSee also To Set the Resolution, on Following commands Integration Time Resolution Integration Time Remote Interface Operation Front / Rear Input Terminal SwitchingDefault 51⁄2 digits, or 1 second 61⁄2 digits Returns Fron or Rear Resolution Choices Integration Time Autozero Autozero Measurement Configuration Autozero Front-panel settings Ranging Input voltage, not its frequency Remote Interface Operation You can set the range using anyAutoranging or manual ranging. For frequency and period See also To Select a Range, on Math Operations Math OperationsFreq Per Cont Diode Ratio Null Min-Max DBm Limit MIN-MAXMATH Menu Min-Max OperationSee also To Store Minimum and Maximum Readings, on Null Relative Operation Entering a null value also turns on the null function Math Operations Null RelativeSee also To Make Null Relative Measurements, on DB REL Math Menu DB MeasurementsSee also To Make dB Measurements, on DBm REF R Math Menu DBm MeasurementsSee also To Make dBm Measurements, on Set the upper limit Limit TestingEnable or disable limit test Set the lower limit Reading that exceeds the upper or lower limit Limit testingMore information RS-232 interface circuitry may be damaged Triggering Triggering Wait-for StateTrigger Trigger Source Choices Key is disabled when in remoteFront-panel Key is disabled when in remote Remote Interface Operation See also External Trigger Terminal, on TRIGgerSOURce IMMediate Wait-for-Trigger State Halting a Measurement in Progress Number of Samples Front-Panel Operation Number of Triggers Trigger Delay Zero Delay Trigger DelayAuto Delay DC Voltage and DC Current for all ranges Automatic Trigger DelaysResistance 2-wire and 4-wire AC Voltage and AC Current for all ranges Read Hold Trig Menu Reading HoldSee also To Use Reading Hold, on Voltmeter Complete Terminal External Trigger Terminal System-Related Operations System-Related OperationsReading Memory SYS Menu Error Conditions Error SYS Menu Test SYS Menu Self-TestReturns 0 if the self-test is successful, or 1 if it fails Display SYS Menu Disable/enable the displayDisplay Control Display the string enclosed in quotes Beeper Control Issue a single beep immediatelyDisable/enable beeper state Beep SYS Menu Comma SYS Menu Comma SeparatorsFirmware Revision Query See also To Turn Off the Comma Separator, on Scpi Language Version Query You cannot query the Scpi version from the front panel Gpib Address Remote Interface ConfigurationRemote Interface Configuration Gpib address can be set only from the front-panel See also To Select the Remote Interface, on Remote Interface SelectionRemote interface can be set only from the front-panel Gpib RS-232 Parity Selection RS-232 Baud Rate Selection RS-232Parity I/O Menu Programming Language Selection Language I/O Menu Calibration Overview Calibration OverviewCalibration Security Characters Calibration Security Secured CAL Menu Unsecured CAL Menu Unsecure with old code Calibration CountEnter new code Calibration Message Operator Maintenance Operator MaintenanceTo Replace the Power-Line Fuse To Replace the Current Input Fuses Power-On and Reset State Power-On and Reset State 102 Remote Interface Reference Command Summary, starting on Remote Interface Reference Command Summary Command Summary 106 107 See page 124 for more information CALCulate See page 127 for more information See page 132 for more information 110 111 Simplified Programming Overview MEASure? and CONFigure Preset StatesCommand MEASure? and CONFigure Setting Simplified Programming Overview Using the MEASure? Command Using the CONFigure Command Using the READ? Command Using the range and resolution ParametersYou must specify a range to use the resolution parameter Before sending the second query command Using the INITiate and FETCh? CommandsTo avoid this, do not send a query command without reading MEASure? Simplified Programming Overview CONFigure MEASure? and CONFigure Commands MEASure? and CONFigure Commands MEASureCONTinuity? MEASureDIODe? CONFigureCURRentDC rangeMINMAXDEF,resolutionMINMAXDEF CONFigureDIODe CONFigureCONTinuityCONFigure? Measurement Configuration Commands Measurement Configuration Commands FREQuencyAPERture? MINimumMAXimum FunctionRESolution resolutionMINimumMAXimumFunctionRESolution? MINimumMAXimum PERiodAPERture? MINimumMAXimum SENSeZEROAUTO Offonceon SENSeDETectorBANDwidth 320200MINimumMAXimumSENSeDETectorBANDwidth? MINimumMAXimum SENSeZEROAUTO? Math Operation Commands Math Operation Commands CALCulateAVERageAVERage? CALCulateAVERageMINimum?CALCulateAVERageMAXimum? CALCulateAVERageCOUNt? DATAFEED? See also Triggering, starting on page 71 in chapter 128 129 Triggering Commands Triggering CommandsREAD? TRIGgerDELayAUTO Offon TRIGgerDELay secondsMINimumMAXimumTRIGgerDELay? MINimumMAXimum TRIGgerDELayAUTO? System-Related Commands System-Related Commands TST? RSTIDN? Scpi Status Model What is an Event Register?What is an Enable Register? Scpi Status Model Scpi Status System Bit Definitions Status Byte Register Status ByteBit Decimal Definition Value Using Service Request SRQ and Serial Poll U t i o n To Interrupt Your Bus Controller Using SRQ Using *STB? to Read the Status ByteTo Determine When a Command Sequence is Completed How to Use the Message Available Bit MAV Using *OPC to Signal When Data is in the Output Buffer Standard Event Register Bit Definitions Standard Event Register Scpi Status Model Questionable Data Register Bit Definitions Questionable Data Register 143 CLS Status Reporting CommandsStatus Reporting Commands ESE? OPC? ESR?OPC PSC? Calibration Commands Calibration Commands CALibrationVALue value CALibrationSTRing quoted stringCALibrationSTRing? CALibrationVALue? RS-232 Interface Configuration RS-232 Interface ConfigurationRS-232 Configuration Overview Even / 7 data bits, factory setting or Odd / 7 data bits RS-232 Data Frame Format Connection to a Computer or Terminal RS-232 Interface Configuration DTR / DSR Handshake Protocol Multimeter sets the DTR line False in the following cases RS-232 Troubleshooting RS-232 Interface Commands RS-232 Interface Commands An Introduction to the Scpi Language An Introduction to the Scpi LanguageSENSe Command Format Used in This Manual Command Separators Using the MIN and MAX Parameters Querying Parameter Settings Scpi Command Terminators IEEE-488.2 Common Commands Scpi Parameter Types Output Data Formats Output Data FormatsType of Output Data Output Data Format Using Device Clear to Halt Measurements Using Device Clear to Halt MeasurementsTalk only for Printers To Set the Gpib Address Move down a level to the HP-IB Addr commandTo Set the Gpib Address Turn on the front-panel menu To Select the Remote Interface Move down a level and then across to the Interface commandTo Select the Remote Interface Move down to the parameter level to select the interface To Set the Baud Rate Move down a level and then across to the Baud Rate commandTo Set the Baud Rate Move down to the parameter level to select the baud rate To Set the Parity Move down a level and then across to the Parity commandTo Set the Parity Move down to the parameter level to select the parity To Select the Programming Language Move down a level and then across to the Language commandTo Select the Programming Language O Menu Alternate Programming Language Compatibility Agilent 3478A Language SettingAlternate Programming Language Compatibility Fluke 8840A/8842A Language Setting Fluke 8840A Description Agilent 34401A Action Command Scpi Compliance Information Scpi Compliance Information IEEE-488 Compliance Information Dedicated Hardware Lines Addressed CommandsIEEE-488.2 Common Commands IEEE-488 Compliance Information 170 Error Messages Error Messages Execution Errors 121 Execution Errors 112113 123 158 Execution Errors 151Invalid string data String data not allowed 223 Execution Errors 221222 224 420 Execution Errors 350410 430 511 Execution Errors 501502 512 602 Self-Test Errors601 603 Calibration Errors 705 Calibration Errors 703704 706 731 Calibration Errors 725730 732 Application Programs Application Programs Gpib Operation Using Basic Using MEASure? for a Single MeasurementUsing MEASure? for a Single Measurement Gpib Operation Using QuickBASIC Using CONFigure with a Math Operation Using CONFigure with a Math Operation 187 Using the Status Registers Using the Status RegistersOn next Using the Status Registers Gpib Operation Using Basic END While Using the Status Registers Gpib Operation Using QuickBASIC 191 RS-232 Operation Using QuickBASIC RS-232 Operation Using QuickBASIC RS-232 Operation Using Turbo C RS-232 Operation Using Turbo C 194 195 196 Measurement Tutorial Thermal EMF Errors Copper-to Approx. ∝V / C Leakage Current Errors Loading Errors dc voltsLoading Errors dc volts Digits NPLCs Integration Time Rejecting Power-Line Noise VoltagesRejecting Power-Line Noise Voltages 60 Hz 50 Hz Common Mode Rejection CMR Common Mode Rejection CMRNoise Caused by Magnetic Loops Noise Caused by Ground Loops Noise Caused by Ground Loops Resistance Measurements Wire Ohms MeasurementsResistance Measurements Removing Test Lead Resistance Errors Removing Test Lead Resistance ErrorsPower Dissipation Effects Settling Time Effects DC Current Measurement Errors Errors in High Resistance MeasurementsErrors in High Resistance Measurements True RMS AC Measurements True RMS AC Measurements Crest Factor Errors non-sinusoidal inputs Crest Factor Errors non-sinusoidal inputsAc + dc = √ ac2 + dc2 Bandwidth Error = C.F x F Additional error for high frequencies Loading Errors ac voltsLoading Errors ac volts For low frequencies Measurements Below Full Scale High-Voltage Self-Heating ErrorsTemperature Coefficient and Overload Errors Measurements Below Full Scale Voltage Measured = √ Low-Level Measurement ErrorsLow-Level Measurement Errors + Noise AC Current Measurement Errors Common Mode ErrorsCommon Mode Errors Frequency and Period Measurement Errors Frequency and Period Measurement ErrorsMaking High-Speed DC and Resistance Measurements Making High-Speed AC Measurements Making High-Speed AC Measurements Specifications DC Characteristics DC Characteristics DC Characteristics Measuring Characteristics Operating Characteristics AC Characteristics AC Characteristics AC Characteristics Measuring Characteristics Frequency and Period Characteristics Frequency and Period Characteristics Frequency and Period Measurement Considerations General Information General Information Product Dimensions Product Dimensions To Calculate Total Measurement Error To Calculate Total Measurement ErrorRange Input Level Reading Error Range Input Level Range Error Input error =Ppm of input error = 100 Number of Digits and Overrange Interpreting Multimeter SpecificationsInterpreting Multimeter Specifications Sensitivity Specification Probability Criteria Failure Accuracy Hour Accuracy Temperature CoefficientsTransfer Accuracy Day and 1-Year Accuracy Configuring for Highest Accuracy Measurements Configuring for Highest Accuracy Measurements 230 Index Ext Trig, 5 VM Comp, 5 Index 233 234 235 236

Agilent Technologies 34401A manual Display Annunciators, Key as you

Models: 34401A