Keysight Technologies EDU34450A User Manual
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Keysight Technologies EDU34450A User Manual

5 1/2 digit digital multimeter
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User's Guide
EDU34450A
5½ Digit Digital Multimeter

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Summary of Contents for Keysight Technologies EDU34450A

  • Page 1 User’s Guide EDU34450A 5½ Digit Digital Multimeter...

  • Page 2: Table Of Contents

    Set Up the Instrument Take a Measurement Measuring DC Voltage Measuring AC (RMS) Voltage Measuring 2-Wire Resistance Measuring 4-Wire Resistance Measuring DC Current Measuring AC Current Measuring Frequency for Voltage Measuring Frequency for Current Testing Continuity Keysight EDU34450A User's Guide...
  • Page 3 Measurement Speed Consideration Secondary Measurement Considerations DC Voltage Dynamic Range in Secondary Measurement Voltage and Current in Dual Measurement Resistance Measurement Considerations Removing Test Lead Resistance Errors Minimizing Power Dissipation Effects Errors in High Resistance Measurements Keysight EDU34450A User's Guide...
  • Page 4 Frequency Measurement Errors DC Current Measurements Capacitance Measurements Temperature Measurements Other Sources of Measurement Error Loading Errors (AC Volts) Measurements Below Full Scale High-Voltage Self-Heating Errors AC Current Measurement Errors (Burden Voltage) Low-Level Measurement Errors Pulse Measurement Error Keysight EDU34450A User's Guide...

  • Page 5: Notices

    No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies as governed by United States and international copyright laws.

  • Page 6: U.s. Government Rights

    Declarations of Conformity Declarations of Conformity for this product and for other Keysight products may be downloaded from the Web. Go to https://regulations.about.keysight.com/DoC/default.htm. You can then search by product number to find the latest Declaration of Conformity. Keysight EDU34450A User's Guide...

  • Page 7: Safety Information

    A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly per- formed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated con- ditions are fully understood and met. Keysight EDU34450A User's Guide...

  • Page 8: Safety And Regulatory Information

    Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer's failure to comply with these requirements.
  • Page 9 Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to a Keysight Technologies Sales and Service Office for service and repair to ensure that safety features are maintained. To contact Keysight for sales and technical support, refer to the support links on the following Keysight website: www.keysight.com/find/assist...
  • Page 10 ENSURE TEST LEAD IS USED AS SPECIFIED If the Test Leads are used in a manner not specified by Keysight Technologies, the protection provided by the Test Leads may be impaired. Also, do not use a damaged or worn Test Lead. Instrument damage or personal injury may result.

  • Page 11: Protection Limits

    Protection Limits The Keysight EDU34450A 5½ Digital Multimeter provides protection circuitry to prevent damage to the instrument and to protect against the danger of electric shock, provided that the Protection Limits are not exceeded. To ensure safe operation of the instrument, do not exceed the Protection Limits shown on the front panel, as defined below:...

  • Page 12: Input Terminal Protection Limits

    The EDU34450A may be used to make measurements with the HI and LO inputs connected to mains in such devices, or to the branch outlet itself (up to 300 VAC rms). However, the EDU34450A may not be used with its HI...

  • Page 13: Safety Symbols

    Voltages above 300 VAC rms may be measured only in circuits that are isolated from mains. However, transient overvoltages are also present on circuits that are isolated from mains. The EDU34450A is designed to safely withstand occasional transient overvoltages up to 2500 Vpk. Do not use this multimeter to measure circuits where transient overvoltages could exceed this level.

  • Page 14: Regulatory Markings

    – This EMC statement applies to the equipment only for use in business environment. 사 용 자 안 내 문 이 기기는 업무용 환경에서 사용할 목적으로 적합성평가를 받은 기기로서 가 정용 환경에서 사용하는 경우 전파간섭의 우려가 있습니다. – 사용자 안내문은 “업무용 방송통신기자재”에만 적용한다. Keysight EDU34450A User's Guide...

  • Page 15: Safety And Emc Requirements

    Full accuracy to 80% RH at 0 °C to 30 °C (non-condensing) Full accuracy to 40% RH at 30 °C to 55 °C (non-condensing) Altitude 3000 m Pollution degree Power supply and line frequency 100, 120, 220 , 240 V 50/60 Hz Power consumption 13 VA max Keysight EDU34450A User's Guide...

  • Page 16: Introduction To The Instrument

    Rear Panel at a Glance Fuse Information Instrument Dimensions The Keysight EDU34450A 5½ Digit Multimeter is capable of providing a wide range of measurement functions such as DC voltage, DC current, True RMS AC voltage and AC current, 2-wire and 4-wire resistance, frequency, diode test, continuity, capacitance, and temperature measurements.

  • Page 17: Instrument At A Glance

    Instrument at a Glance The Keysight EDU34450A 5½ Digit Digital Multimeter offers full range of measurement capabilities with class- leading display and user interface. Key features: – Eleven measurement functions; DCV, DCI, True RMS ACV, ACI, 2- and 4-wire resistance, frequency, continuity, diode test, capacitance, and temperature –...

  • Page 18: Front Panel Display At A Glance

    USB port — allows an external USB flash drive to be connected to the instrument The EDU34450A supports USB flash drives with the following specification: USB 2.0, FAT32 format, up to 32 GB. We recommend using a SanDisk Cruzer Blade flash drive for the front panel USB port.

  • Page 19: Instrument Status Indicators

    Only available in remote mode, shown when bus trigger is selected and INIT command is sent to the instrument. Data Log Delaying Only available when trigger delay is set more than 0 s with data log enabled, shown after Run/Stop is pressed. Keysight EDU34450A User's Guide...

  • Page 20: Front Panel Buttons At A Glance

    Press [Shift] then press [Store/Recall] to access the Utility menu. [Null] Press to trigger the null function. Math Press [Shift] then press [Null] to enable the Math menu. [Shift] Press to access a button's secondary function. Keysight EDU34450A User's Guide...

  • Page 21: Front Panel Navigation

    Use the arrow keys to navigate menus and adjust values. Use [Enter] to confirm your selection. Rear Panel at a Glance Legend Description Kensington lock Universal Serial Bus (USB-B) interface connector Local Area Network (LAN) interface connector AC line fuse AC power connector Instrument serial number and MAC address Keysight EDU34450A User's Guide...
  • Page 22 Instrument safety and regulatory labels This is a Protection Class 1 equipment (chassis must be connected to a protective earth ground). The mains plug shall only be inserted in an outlet provided with a Protective Earth Terminal. Keysight EDU34450A User's Guide...

  • Page 23: Fuse Information

    1. The current input fuse can be found in the instrument's front panel. Using a slotted (flat head) screwdriver, turn the fuse holder clockwise to remove it from the instrument. 2. Remove the blown fuse from the fuse holder and insert the proper replacement fuse into the fuse holder. Keysight EDU34450A User's Guide...
  • Page 24 (Turn the fuse holder until the white label is no longer visible.) Stop turning the fuse holder when the white label is no longer visible. Do not over-tighten as the plastic fuse holder may crack if it is over-tightened. Keysight EDU34450A User's Guide...

  • Page 25: Power Line Fuse Replacement

    1. The power line fuse can be found in the instrument's rear panel. Disconnect the power cord. Use your fingertips to depress the left and right tabs, and then remove the fuse holder by pulling it out. Keysight EDU34450A User's Guide...
  • Page 26 To change the instrument's line voltage rating (100 V, 120 V, 220 V, or 240 V), rotate the line voltage selector so that the desired voltage appears in the fuse holder window. 4. Re-insert the fuse holder into the instrument. Ensure that you hear a "click" when securing the fuse holder to the instrument. Keysight EDU34450A User's Guide...

  • Page 27: Instrument Dimensions

    Instrument Dimensions Height: 164.70 mm x Width: 313.60 mm Length: 118.60 mm Keysight EDU34450A User's Guide...

  • Page 28: Getting Started

    Prepare the Instrument for Use Take a Measurement Select a Range Use the Built-in Help System Remote Interface Connections Remote Interface Configurations This section describes basic procedures to help you get started quickly with the instrument. Keysight EDU34450A User's Guide...

  • Page 29: Prepare The Instrument For Use

    The documentation listed below can be downloaded for free through our website at www.keysight.com/find/EDU34450A-manual – Keysight EDU34450A 5½ Digit Digital Multimeter Quick Start Guide. Printed copy, included with your instrument. – Keysight EDU34450A 5½ Digit Digital Multimeter User's Guide. This manual.

  • Page 30: Take A Measurement

    2. Connect the terminals as shown below. 3. Read the display. – Press Resolution to change the reading speed to either Slow Medium Fast , or – Press Input Z to set the input impedance to either 10MΩ Auto Keysight EDU34450A User's Guide...

  • Page 31: Measuring Ac (Rms) Voltage

    – Input Impedance: >10 GΩ selected range (0.1 V and 1 V only) or ~10 MΩ all ranges (typical) – Input Protection: 1000 V on all ranges (HI terminal) Measuring AC (RMS) Voltage 1. Press [ACV] . Keysight EDU34450A User's Guide...
  • Page 32 – Measurement Method: AC coupled true RMS - measures the AC component with up to 400 VDC bias on any range – Crest Factor: Maximum 3:1 at full scale – Input Impedance: >1.1 MΩ in parallel with <100 pF on all ranges – Input Protection: 750 V rms on all ranges (HI terminal) Keysight EDU34450A User's Guide...

  • Page 33: Measuring 2-Wire Resistance

    – Press OCOMP to enable ( ) or disable ( ) the offset compensation. 2-Wire Resistance Parameters – Measurement Range: 100.000 Ω, 1.00000 kΩ, 10.0000 kΩ, 100.000 kΩ, 1.00000 MΩ, 10.0000 MΩ, 100.000 MΩ. – Speed: Slow, Medium, Fast Keysight EDU34450A User's Guide...

  • Page 34: Measuring 4-Wire Resistance

    2. Connect the terminals as shown below. 3. Read the display. – Press Resolution to change the reading speed to either Slow Medium , or Fast – Press OCOMP to enable ( ) or disable ( ) the offset compensation. Keysight EDU34450A User's Guide...
  • Page 35 MΩ. – Speed: Slow, Medium, Fast – Default Setting: Autoranging, Slow measurement speed – Measurement Method: 4-wire ohms – Input protection: 1000 V on all ranges (across HI-LO terminals), 200 V (across HI Sense-LO Sense terminals). Keysight EDU34450A User's Guide...

  • Page 36: Measuring Dc Current

    – Measurement Range: 10.0000 mA, 100.000 mA, 1.00000 A, 3.0000 A – Speed: Slow, Medium, Fast – Default Setting: Autoranging, Slow measurement speed – Shunt Resistance: 1 Ω for 10 mA and 100 mA, and 0.1 Ω for 1 A and 3 A ranges Keysight EDU34450A User's Guide...

  • Page 37: Measuring Ac Current

    Press Resolution to change the reading speed to either Slow Medium , or Fast AC Current Parameters – Measurement Range: 10.0000 mA, 100.000 mA, 1.00000 A, 3.0000 A – Speed: Slow-2 Hz High Pass Filter (HPF), Medium-20 Hz HPF, Fast-200 Hz HPF Keysight EDU34450A User's Guide...

  • Page 38: Measuring Frequency For Voltage

    – Input Protection: Front panel, 4 A 600 V ceramic fast-acting fuse Measuring Frequency for Voltage 1. Press [ACV] > [Freq] . 2. Connect the terminals as shown below. 3. Read the display. Press Gate Time to change the gate time to either 100ms Keysight EDU34450A User's Guide...
  • Page 39 For inputs from 10 mV to 100 mV (in the 100 mV range), multiply the total % of reading error by 10. – Gate Time: 1 second (slow mode) or 0.1 second (medium mode) – Input Protection: 750 V rms on all ranges (HI terminal) Keysight EDU34450A User's Guide...

  • Page 40: Measuring Frequency For Current

    Press Gate Time to change the gate time to either 100ms Frequency for Current Parameters – Measurement Range: 10.0000 mA, 100.000 mA, 1.00000 A, 3.0000 A. Range is based on the current level of the signal, not frequency. – Measurement Method: Reciprocal counting technique Keysight EDU34450A User's Guide...
  • Page 41 For inputs from 1 mA to 10 mA (in the 10 mA range), multiply the total % of reading error by 10. – Gate Time: 1 second (slow mode) or 0.1 second (medium mode) – Input Protection: Front panel, 4 A 600 V ceramic fast-acting fuse Keysight EDU34450A User's Guide...

  • Page 42: Testing Continuity

    A resistance value is observed if the circuit is closed, and OPEN is observed if the circuit is open. Continuity Parameters – Measurement Method: 0.5 mA (typical) constant current source – Response Time: 100 samples/second with audible tone – Continuity Threshold: 10 Ω fixed Keysight EDU34450A User's Guide...

  • Page 43: Testing Diodes

    – For the forward bias diode position: A value ranging from 0.3 to 0.8 V is observed if the diode is good (for most sil- icon diodes). – If OPEN is observed on both directions, the diode is bad. – If a 0 V to 0.4 V drop is observed on both directions, the diode is shorted. Keysight EDU34450A User's Guide...

  • Page 44: Measuring Temperature

    – Measurement Method: 0.5 mA (typical) constant current source – Response Time: 100 samples/second with audible tone – Input Protection: 1000 V (HI terminal) Measuring Temperature 1. Press [Temp] . 2. Connect the terminals as shown below. 3. Read the display. Keysight EDU34450A User's Guide...
  • Page 45 – Measurement Range: –80.0 °C to 150.0 °C, –110.0 °F to 300.0 °F – Measurement Method: 2-wire Ohms measurement of 5 kΩ thermistor sensor (E2308A) with computed conversion – Input Protection: 1000 V (HI terminal) – Optional Accessory: E2308A Thermistor Temperature Probe Keysight EDU34450A User's Guide...

  • Page 46: Measuring Capacitance

    – Measurement Range: 1.000 nF, 10.00 nF, 100.0 nF, 1.000 μF, 10.00 μF, 100.0 μF, 1.000 mF, 10.00 mF – Default Setting: Autoranging – Measurement Method: Computed from constant current source charge time. Typical 0.12 V to 1.0 V AC signal level – Input Protection: 1000 V (HI terminal) Keysight EDU34450A User's Guide...

  • Page 47: Select A Range

    Press and hold any softkey or front panel button, such as [DCV] . If the message contains more information than will fit on the display, press the down arrow softkey to view the remaining information. Press OK to exit Help. Keysight EDU34450A User's Guide...

  • Page 48: Remote Interface Connections

    If you have not already done so, install the Keysight IO Libraries Suite, which can be found at www.key- sight.com/find/iolib . For detailed information about interface connections, refer to the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite. Connect to the Instrument via USB The following figure illustrates a typical USB interface system.

  • Page 49: Connect To The Instrument Via Lan (Site And Private)

    Connection Expert to discover the instrument. If the instrument cannot be found, add the instrument using its hostname or IP address. If this does not work, refer to “Troubleshooting Guidelines” in the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite.
  • Page 50 To add the instrument, you can request the Connection Expert to discover the instrument. If the instrument cannot be found, add the instrument using its hostname or IP address. If this does not work, refer to “Troubleshooting Guidelines” in the Keysight Technologies USB/LAN/GPIB Interfaces Connectivity Guide included with the Keysight IO Libraries Suite.

  • Page 51: Remote Interface Configuration

    Selecting Yes cycles power to the instrument and activates the settings. LAN settings are non-volatile; they will not be changed by power cycling or *RST. If you do not want to save your changes, press No to cancel all changes. Keysight EDU34450A User's Guide...
  • Page 52 If the settings are different, it is because the network has automatically assigned its own settings. Press LAN Settings to access the LAN Settings Menu. See Modify the LAN Settings for more details. Press LAN Reset restore the LAN settings to default values. Keysight EDU34450A User's Guide...
  • Page 53 Modify the LAN Settings As shipped from the factory, the instrument pre-configured settings should work in most LAN environments. Refer to the "Non-Volatile Settings" in the Programming Guide for information on the factory-shipped LAN settings. Keysight EDU34450A User's Guide...
  • Page 54 This is typically the easiest way to establish LAN communication for your instrument. All you need to do is leave DHCP on. Contact your LAN administrator for details. Keysight EDU34450A User's Guide...
  • Page 55 0 through 255. You can enter a new IP address using the arrow keys. Press Previous or Next to move the cursor to the next field or previous field. Do not enter leading zeros. Subnet Mask : Subnetting allows the LAN administrator to subdivide a network to simplify administration and Keysight EDU34450A User's Guide...
  • Page 56 Gateway : A gateway is a network device that connects networks. The default gateway setting is the IP address of such a device. Use the arrow keys to enter a new gateway address. Press Previous or Next to move the cursor to the next field or previous field. Press Apply to save your changes. Keysight EDU34450A User's Guide...
  • Page 57 IP address. The hostname is entered as a string using the softkeys provided. The hostname may include letters, numbers, and dashes ("-"). Press Apply to save your changes. The instrument is shipped with a default hostname with the following format: K-{modelnumber}-{serialnumber}, Keysight EDU34450A User's Guide...
  • Page 58 ) and Second DNS ( DNS2 ). Use the arrow keys to enter a new DNS server address. Press Previous or Next to move the cursor to the next field or previous field. See your network administrator for details. Keysight EDU34450A User's Guide...
  • Page 59 Use the softkeys provided to set a desired service name. The name must start with letter; other characters can be an upper or lower case letters, numeric digits, or dashes ("-"). Press Apply to save your changes. Keysight EDU34450A User's Guide...

  • Page 60: Scpi Socket Services

    PC web software interprets byte values with leading zeros as octal (base 8) numbers. For example, "192.168.020.011" is actually equivalent to decimal "192.168.16.9" because ".020" is interpreted as "16" expressed in octal, and ".011" as "9". To avoid confusion, use only decimal values from 0 to 255, with no leading zeros. Keysight EDU34450A User's Guide...

  • Page 61: Features And Functions

    This chapter contains details on instrument features, including front panel and remote interface operation. You may want to read Front Panel Menu Operation first. See the EDU34450A Programming Guide for details on SCPI commands and queries. Keysight EDU34450A User's Guide...

  • Page 62: Secondary Display

    >10 kHz / n × 1 kHz for <10 kHz – For more information, please refer to Measurement Speed Consideration. – For remote operation, refer to the DISPlay:WINDow2 commands in the Keysight EDU34450A Programming Guide . Front Panel Operations [Shift] >...

  • Page 63: Dual Display Operation Examples

    A single measurement for both DC voltage and AC ripple can be displayed through both displays while testing a rectifier circuit. 1. Connect the red and black test leads to the input terminal and probe the test points. Keysight EDU34450A User's Guide...
  • Page 64 > [Display] > 2nd Meas | OFF to enable the secondary measurement. 4. Press Meas > to select AC voltage as the secondary measurement. 5. Press Range and Resolution to adjust the measurement range and speed accordingly. Keysight EDU34450A User's Guide...

  • Page 65: Math Operations

    – Changing the range and resolution is allowed for all math operations. – You can edit the reference/offset/limit values used for the Null, Scaling, and Limits math operations. – For remote operation, refer to the CALCulate Subsystem in the EDU34450A Programming Guide . Null When making null measurements, also called relative, each reading is the difference between a stored null offset value and the input signal.
  • Page 66 > [Null] | Math > Null Offset Value . Use the arrow keys to set a desired To change the Null offset value, press value. Press [Enter] when done. To disable the Null operation, press Null ON | Keysight EDU34450A User's Guide...

  • Page 67: Scaling

    The reading before the math formula is applied is shown in the secondary display. To change the dB reference value, press dB Reference Value . Use the arrow keys to set a desired value. Press [Enter] when done. Keysight EDU34450A User's Guide...
  • Page 68 900 Ω, 1000 Ω, 1200 Ω, or 8000 Ω. Front Panel Operations [Shift] > [Null] | Math > Function Scaling > Scaling | OFF . Then press Scaling Function and select Press enable the dBm Scaling operation. Keysight EDU34450A User's Guide...
  • Page 69 The reading before the math formula is applied is shown in the secondary display. To change the dBm reference value, press dBm Reference Value. Use the arrow keys to select a desired value. To disable the dBm Scaling operation, press Scaling ON | Keysight EDU34450A User's Guide...

  • Page 70: Limits

    The limit values and state is shown on the bottom of the display. – PASS: The readings are within the specified limits. – FAIL-HI: The reading is above the high limit. – FAIL-LO: The reading is below the low limit. Keysight EDU34450A User's Guide...
  • Page 71 | OFF . Each time the input value transitions from PASS to HIGH or from PASS to LOW, or when transitioning directly from HIGH to LOW or LOW to HIGH, the instrument beeps once. To disable the Limit operation, press Limits ON | Keysight EDU34450A User's Guide...

  • Page 72: Statistics

    The minimum, maximum, and average readings together with the number of samples taken are shown on the bottom of the display. To disable the readings, press Statistics ON | OFF Acquire The EDU34450A can operate in Continuous Data Log measurement mode. Continuous At power-on, the default measurement mode is Continuous .
  • Page 73 The following command selects the immediate trigger source: TRIGger:SOURce IMMediate The CONFigure and MEASure? commands automatically set the trigger source to IMMediate. Refer to the Keysight EDU34450A Programming Guide for complete description and syntax for these commands. Software (Bus) Triggering The Software (Bus) trigger source can only be enabled via SCPI.

  • Page 74: Data Log

    – The INITiate command only initiates the measurement and needs a trigger (BUS or IMMEdiate) to make the actual measurement. Refer to the Keysight EDU34450A Programming Guide for the complete description and syntax for these commands. Data Log The Data Log measurement mode, is available only from the multimeter's front panel. Data Log mode provides a front–panel user interface that allows you to set up data logging into the instrument’s non–volatile memory,...
  • Page 75 Use the [Down] or [Up] arrow keys to highlight the next or previous data point. The [Right] or [Left] arrow keys to display the next or previous page. Overview – always displays the next 12 data points. Keysight EDU34450A User's Guide...
  • Page 76 – List allows you to step through the data points shown. Keysight EDU34450A User's Guide...
  • Page 77 You can log data from both primary and secondary measurements if Secondary Display is enabled. Press Primary | Secondary to toggle between the readings from the primary (shown in yellow) or secondary display (shown in blue). Keysight EDU34450A User's Guide...
  • Page 78 Keysight EDU34450A User's Guide...

  • Page 79: Probe Hold

    – Press [ – ] or [ + ] to decrease or increase the measurement range manually. Press [Range] to enable autoranging. – Press Resolution to toggle the resolution between Slow Medium – Press Remove Last to remove the last captured reading. Keysight EDU34450A User's Guide...

  • Page 80: Run/Stop

    Data Log measurement mode starts the data logging when the specified delay has elapsed. – Data logging will stop after the specified duration (time or number of readings) has occurred or after you long press [Run/Stop] . Keysight EDU34450A User's Guide...

  • Page 81: Utility Menu

    Configures the I/O parameters for remote operations Provides access to self-test, calibration, and security functions Specifies the user preferences that control how you interact with the instrument Displays information related the instrument and allows you to view all recorded errors Keysight EDU34450A User's Guide...

  • Page 82: I/O Config Menu

    I/O Config Menu I/O Config configures the I/O parameters for remote operations over the LAN interface. Remote Interface Connections Remote Interface Configurations for more details. Instrument Setup Menu Instr. Setup provides access to self-test, calibration, and security functions. Keysight EDU34450A User's Guide...
  • Page 83 Self Test verifies proper instrument operation. This self-test is equivalent to the *TST? SCPI query, and you do not need to remove inputs to the instrument to run the test. Calibration accesses the instrument's calibration procedures. See "Calibration Adjustment Procedures" in the EDU34450A Service Guide for more details. Keysight EDU34450A User's Guide...

  • Page 84: User Settings Menu

    Press Lock to secure the instrument against accidental or unauthorized instrument calibration. When shipped from the factory, the instrument is secured, with the security code (calibration password) set to EDU34450A . The same security code must be used for front panel and remote operation. If you secure the instrument from the front panel, use that same code to unsecure it from the remote interface.

  • Page 85: Help Menu

    Help displays information related to your instrument and allows you to view all the errors in the error queue. About shows the instrument IP address, serial number, and firmware revision. Scan the QR code shown to view the documentation related to this instrument. Keysight EDU34450A User's Guide...

  • Page 86: Store/Recall

    Error View displays all the errors in the error queue. See "SYSTem:ERRor?" in the EDU34450A Programming Guide for more details. Store/Recall You can save and recall complete instrument states. – There are five internal user storage registers; numbered 1 through 5.
  • Page 87 – Select Store In to choose between the available options: Last State 1 State 2 State 3 State 4 State 5 , or – Press Store to save the current instrument state into the selected storage location. Keysight EDU34450A User's Guide...
  • Page 88 – Press Select Folder to select a folder in the directory of the connected external USB device – Press Rename to rename the file. – Press Delete to delete the selected file. – Press Select to confirm your selection. Keysight EDU34450A User's Guide...
  • Page 89 – Press Delete to delete the selected file. – Press Select to confirm your selection. – Select File Name to specify a file name. – Press Store to save the current instrument state into the selected storage location. Keysight EDU34450A User's Guide...
  • Page 90 USB device. – Select Browse to browse the directory of the connected external USB device. Use the arrow keys to navigate. – Press Recall to recall the instrument state from the selected storage location. Keysight EDU34450A User's Guide...
  • Page 91 Power On selects the state that is loaded at power-up. This can be either the state when the instrument was powered down with the power switch ( Last ) or the factory default state ( Factory Default Press Set Power On to confirm your power-on selection ( Last Factory Default Keysight EDU34450A User's Guide...

  • Page 92: User Label

    The user label is entered as a string using the softkeys provided. The user label may include letters, numbers, and symbols ( _ - + = # % @ $ ( ) [ ] { } ~ . ). Keysight EDU34450A User's Guide...
  • Page 93 Press Apply to save your changes. Keysight EDU34450A User's Guide...

  • Page 94: Characteristics And Specifications

    Characteristics and Specifications For the characteristics and specifications of the EDU34450A 5½ Digit Digital Multimeter, refer to the data sheet at: https://www.keysight.com/us/en/assets/3120-1002/data-sheets/EDU34450A-5-5-Digit-Dual-Display-Digital-Mul- timeter.pdf. Keysight EDU34450A User's Guide...

  • Page 95: Measurement Tutorial

    Other Primary Measurement Functions Other Sources of Measurement Error The Keysight EDU34450A 5½ Digital Multimeter is capable of making very accurate measurements. In order to achieve the greatest degree of accuracy, you must take the necessary steps to eliminate potential measurement errors.

  • Page 96: Dc Measurement Considerations

    Ideally, a multimeter is completely isolated from earth-referenced circuits. However, there is finite resistance between the instrument’s input LO terminal and earth ground, as shown below. This can cause errors when measuring low voltages which are floating relative to earth ground. Keysight EDU34450A User's Guide...

  • Page 97: Noise Caused By Magnetic Loops

    As shown in figure below any voltage difference between the two ground reference points (V ) causes a current to flow through the measurement leads. This causes noise and ground offset voltage (usually power-line related), which are added to the measured voltage. Keysight EDU34450A User's Guide...

  • Page 98: Measurement Speed Consideration

    A longer aperture yields better resolution; a shorter aperture provides faster measurements. For example, the fast mode for DC Voltage measurements set a specific 1 ms measurement period and is not based on power line frequency. No normal mode rejection is provided in aperture mode. Keysight EDU34450A User's Guide...

  • Page 99: Secondary Measurement Considerations

    1.514 V which exceeds the ADC dynamic range of 1.2 V, causing an error in DC measurement. Select a higher range DCV 10 V range for better accuracy. The same error of measurement applies to DCV and ACI dual mode caused by the instrument’s series burden voltage. Keysight EDU34450A User's Guide...

  • Page 100: Voltage And Current In Dual Measurement

    (DUT). If power dissipation is a problem, you should select the instrument’s next higher measurement range to reduce the errors to acceptable levels. The following table shows several examples. Keysight EDU34450A User's Guide...

  • Page 101: Errors In High Resistance Measurements

    Thermal EMF caused by dissimilar metals can create a parasitic voltage in the measurement circuit (V ). The thermal EMF can be caused by the input lead connections or internally in resistor R. In general, this voltage will not change with the current applied to the resistor. Keysight EDU34450A User's Guide...

  • Page 102: True Rms Ac Measurements

    True RMS AC Measurements True RMS responding multimeters, like the EDU34450A, measure the “heating” potential of an applied voltage. Power dissipated in a resistor is proportional to the square root of an applied voltage, independent of the waveshape of the signal. This instrument accurately measures true RMS voltage or current, as long as the wave shape contains negligible energy above the instrument’s effective bandwidth.

  • Page 103: True Rms Accuracy And High-Frequency Signal Content

    Traditionally, digital multimeters include a crest factor derating table that applies at all frequencies. The measurement algorithm used in the EDU34450A is not inherently sensitive to crest factor, so no such derating is necessary. With this instrument, as discussed in the previous section, the focal issue is high-frequency signal content which exceeds the instrument’s bandwidth.
  • Page 104 The table above gives an additional error for each waveform, to be added to the value from the accuracy table provided in the Keysight EDU34450A Datasheet . Example: A pulse train with level 1 Vrms, is measured on the 1 V range. It has pulse heights of 3 V (that is, a Crest Factor of 3) and duration 111 μs.

  • Page 105: Ac Filter

    “slow” signals. The error is inversely proportional to frequency. Measurement errors also occur if you attempt to measure the frequency of an input following a DC offset voltage change. You must allow the instrument’s input to fully settle before making frequency measurements. Keysight EDU34450A User's Guide...

  • Page 106: Dc Current Measurements

    After applying more than 1 A current measurement, do allow a few minutes for heat dissipation to ensure better accuracy for other measurement. Capacitance Measurements The instrument implements capacitance measurements by applying a known current to the capacitor as shown below: Keysight EDU34450A User's Guide...

  • Page 107: Temperature Measurements

    In the AC voltage function, the input of the instrument appears as a (at least) 1.1 MΩ resistance in parallel with <100 pF of capacitance. The cabling that you use to connect signals to the instrument also adds capacitance and loading. For low frequencies, the loading error is: Keysight EDU34450A User's Guide...

  • Page 108: Measurements Below Full Scale

    You can reduce the high-frequency impedance of a source by placing a capacitor in parallel with the instrument’s input terminals. You may have to experiment to determine the correct capacitor value for your application. Keysight EDU34450A User's Guide...

  • Page 109: Pulse Measurement Error

    T. Errors may occur when the pulse signal is measured at low voltage range due to saturation of the instrument’s analog-to-digital (ADC) rail voltage. Keysight EDU34450A User's Guide...
  • Page 110 This information is subject to change without notice. © Keysight Technologies 2021 Edition 1, February 2021 Printed in Malaysia *EDU34450-90002* EDU34450-90002 www.keysight.com...

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