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Summary of Contents for Keysight Technologies EDU34450A
- Page 1 Service Guide EDU34450A 5½ Digit Digital Multimeter...
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Page 2: Table Of Contents
AC voltage verification test AC current verification test Capacitance verification test Calibration Adjustments Calibration Adjustment Closed–case electronic calibration Keysight Technologies calibration services Calibration interval Time required for calibration Automating calibration procedures Calibration Adjustment Process Calibration Security Keysight EDU34450A Service Guide... - Page 3 Gain adjustments DC voltage gain adjustment procedure DC current gain adjustment procedure AC voltage gain adjustment procedure AC current gain adjustment procedure Ohms gain adjustment procedure Capacitance gain adjustment procedure Frequency gain adjustment procedure Finishing the adjustments Keysight EDU34450A Service Guide...
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Page 4: 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 5: 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 Service Guide... -
Page 6: 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 Service Guide... -
Page 7: Service And Maintenance
Replacing the Current Input Fuse User Replaceable Parts Battery Replacement This chapter provides the specifications and service information on cleaning, troubleshooting, repair, and replaceable parts of the EDU34450A. This chapter also explains how to assemble and disassemble the EDU34450A. Keysight EDU34450A Service Guide... -
Page 8: Specifications And Characteristics
Types of service available If your instrument fails during the warranty period, Keysight Technologies will repair or replace it under the terms of your warranty. After your warranty expires, Keysight offers repair services at competitive prices. You also have the option to purchase a service contract that extends the coverage after the standard warranty expires. -
Page 9: Cleaning And Handling
– Do not use detergent or solvents. – Do not attempt to clean internally. If required, contact a Keysight Technologies Sales and Service office to arrange for proper cleaning to ensure that safety features and performance are maintained. Electrostatic Discharge (ESD) precautions Almost all electrical components can be damaged by electrostatic discharge (ESD) during handling. -
Page 10: Troubleshooting Procedure
2. Connect a red test lead between Ω and 3 A input terminal. 3. Observe the resistance reading on the display. Replace the fuse if the resistance reading is > 0.3 Ω. NOTE: Refer to Current Input Fuse Replacement in EDU34450A User's Guide for details. Self-Test Procedures Remove all test connections to the multimeter before performing self-test. -
Page 11: Self-Test Error
Self-Test Error The EDU34450A self test (see the *TST? command) performs a series of tests on the instrument hardware. Any failure of these tests will generate a SCPI error number -330, with additional test failure information. Refer to the Keysight EDU34450A Programming Guide for more information. -
Page 12: Replacing The Power-Line Fuse
Replacing the Power-Line Fuse Refer to Power Line Fuse Replacement in EDU34450A User's Guide for details. Replacing the Current Input Fuse Refer to Current Input Fuse Replacement in EDU34450A User's Guide for details. User Replaceable Parts You can find the instrument support part list at Keysight's Test & Measurement Parts Catalog http://www.keysight.com/find/parts. - Page 13 (see red circle below), then push down on the opposite end of the battery to secure the battery (see red arrow below). 7. Assemble the rear panel when finished. 8. Reset the date and time. Properly dispose of the used battery in accordance with local laws and regulations. Keysight EDU34450A Service Guide...
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Page 14: Performance Verification
Performance Verification Performance Verification Recommended Test Equipment Test Considerations Quick Performance Check Performance Verification Tests This chapter contains the performance verification procedures which verify that the EDU34450A is operating within its published specifications. Keysight EDU34450A Service Guide... -
Page 15: Performance Verification
Frequency gain verification – AC voltage verification – AC current verification – Optional verification tests Tests not performed with every calibration. Perform these tests to verify additional specifications or functions of the instrument. – Capacitance verification Keysight EDU34450A Service Guide... -
Page 16: Recommended Test Equipment
1/5 instrument 1 year specification AC voltage Fluke 5522A 1/5 instrument 1 year specification AC current Fluke 5522A 1/5 instrument 1 year specification Frequency Fluke 5522A 1/5 instrument 1 year specification Capacitance Fluke 5522A 1/5 instrument 1 year specification Keysight EDU34450A Service Guide... -
Page 17: Test Considerations
Shielded, twisted-pair, PTFE insulated interconnect cables with minimum length are recommended between the calibrator and the multimeter. Cable shields should be earth ground referenced. This configuration is recommended for optimal noises and settling time performance during calibration. Keysight EDU34450A Service Guide... -
Page 18: Quick Performance Check
Adjustment is recommended at every calibration interval. If adjustment is not made, guardbanding at no more than 80% of the specifications, as the verification limits. Ensure that you have read Test Considerations before running the performance verification tests. Keysight EDU34450A Service Guide... -
Page 19: Zero Offset Verification
[b] Specifications are for 4W or 2W resistance function using the Null math function enabled to eliminate lead resistance. Without Null, add 0.2 Ω additional error to 2W resistance function. typ = Typical performance Q = Quick performance verification test points Keysight EDU34450A Service Guide... -
Page 20: Gain Verification
–1 V ±0.2 mV 10 V 10 V ±3 mV 100 V 100 V ±30 mV 1000 V 1000 V ±0.32 V [a] Select 5½ digit (slow mode) measurement resolution Q = Quick performance verification test points Keysight EDU34450A Service Guide... - Page 21 10 mA DC current 10 mA ±11.5 μA 100 mA 100 mA ±107 μA ±3.15 mA 2.99999 A ±9.21 mA [a] Select 5½ digit (slow mode) measurement resolution Q = Quick performance verification test points Keysight EDU34450A Service Guide...
- Page 22 Configuration: 4W Resistance (CONFigure:FRESistance) or 2W Resistance (CONFigure:RESistance) 2W resistance with 2-wire compensation (For 100 Ω ~ 100 kΩ ) 2W resistance without compensation (For 1 MΩ ~ 100 MΩ ) 4W resistance with 4-wire compensation (For 100 Ω ~ 100 kΩ ) Keysight EDU34450A Service Guide...
- Page 23 [b] Specifications are for 4W for 2W resistance function using the Null math function enabled to eliminate lead resistance. Without Null, add 0.2 Ω additional error to 2W resistance function. Q = Quick performance verification test points Keysight EDU34450A Service Guide...
- Page 24 Range Quick check Error from nominal one year 1 Vrms 1 kHz Frequency ±0.28 Hz 0.1 Vrms 20 Hz ±0.008 Hz [a] Select 1 s gate time measurement resolution Q = Quick performance verification test points Keysight EDU34450A Service Guide...
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Page 25: Ac Voltage Verification Test
3. Select each range in the order shown below. Provide the input voltage and frequency as indicated below. 4. Compare measurement results to the appropriate test limits shown in the table. (Be certain to allow for appro- priate source settling) Keysight EDU34450A Service Guide... - Page 26 ±2.25 V 750 V 1 kHz 750 V ±2.25 V 750 V 10 kHz 750 V ±2.25 V [a] Select 5½ digit (slow mode) measurement resolution typ = Typical performance Q = Quick performance verification test points Keysight EDU34450A Service Guide...
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Page 27: Ac Current Verification Test
±6 mA 1 kHz ±6 mA 5 kHz ±22 mA 2.99999 A 45 Hz ±18 mA 2.99999 A 1 kHz ±18 mA 2.99999 A 5 kHz ±66 mA [a] Select 5½ digit (slow mode) measurement resolution Keysight EDU34450A Service Guide... -
Page 28: Capacitance Verification Test
1. Connect the calibrator to the front panel HI and LO input terminals as shown above. The cable capacitance between EDU34450A and calibrator must be impedance controlled with less than 100 pF of cable capacitance. For best accuracy, use only coaxial cable or shielded twisted-pair cable. -
Page 29: Calibration Adjustments
Calibration Adjustments Calibration Adjustment Calibration Adjustment Process Calibration Security Calibration Count Calibration Message Calibration Adjustment Procedure This chapter contains information on adjustments performed after a performance verification fails. Keysight EDU34450A Service Guide... -
Page 30: Calibration Adjustment
Keysight Technologies calibration services When your instrument is due for calibration, contact your local Keysight Service Center for a low-cost re-calibration. The EDU34450A is supported on automated calibration systems, which allow Keysight to provide this service at competitive prices. Calibration interval The recommended calibration interval for Keysight EDU34450A multimeter is one year. -
Page 31: Calibration Adjustment Process
The default security passcode is EDU34450A. The security code cannot be changed by a power cycle or *RST. You can change the passcode from both front panel and remote interface. You can enter a passcode of up to 12 characters. -
Page 32: Calibration Count
You can only store the calibration message when the instrument is unsecured, but you can execute the CALibration:STRing? query regardless of whether the instrument is secured. A new calibration message overwrites the previous message, and messages over 40 characters are truncated. Keysight EDU34450A Service Guide... -
Page 33: Calibration Error
Typically, upon re–applying power, the instrument will report Calibration Corrupt in the Questionable Data Register. Refer to the STAT:QUES:COND? command in the EDU34450A Programming Guide for more details. If this occurs, you should not use the instrument until a complete re–adjustment has been performed. -
Page 34: Gain Adjustments
1 nF (0.4, 1) x Full Scale and Open 10 nF, 100 nF, 1 μF, 10 μF, 100 μF, 1 mF, 10 mF (0.1, 1) x Full Scale Frequency 1 V, 1 kHz 1 Vrms, 1 kHz Keysight EDU34450A Service Guide... -
Page 35: Dc Voltage Gain Adjustment Procedure
[a] Use Keysight 34172B or configure calibrator to 0 mV. Cal Item 0 mV only calibrated once during DC voltage gain adjustment procedure. You need to re-calibrate once you exit calibration mode. [b] Calibration need to be completed on the 1 V range first before proceeding to other ranges. Keysight EDU34450A Service Guide... -
Page 36: Dc Current Gain Adjustment Procedure
[b] Set calibrator to output 2.99999 A to retain connection to Fluke 5522A's AUX HI+LO output terminals. [c] Set calibrator to output -2.99999 A to retain connection to Fluke 5522A's AUX HI+LO output terminals. Before initiating any gain adjustment procedures, perform the zero adjustment at any range first. Keysight EDU34450A Service Guide... -
Page 37: Ac Voltage Gain Adjustment Procedure
[a] Use Keysight 34172B or calibrator configured to 0 mV, DC voltage. [b] AC voltage flatness calibration for 1 kHz and 10 kHz need to be completed for one range (example 100 mV) first before proceeding to another range (example 1 V). Keysight EDU34450A Service Guide... -
Page 38: Ac Current Gain Adjustment Procedure
1 kHz 100 mA 0.1 A, 0.7 A, 1 A 1 kHz 0.3 A, 2.1 A, 3 A 1 kHz [a] Set calibrator to output 2.99999 A to retain connection to Fluke 5522A's AUX HI+LO output terminals. Keysight EDU34450A Service Guide... -
Page 39: Ohms Gain Adjustment Procedure
You need to re-calibrate once you exit calibration mode. [b] Remove test leads from EDU34450A's input terminals for 2-wire open calibration. [c] Configure calibrator output to STBY and do not remove 4-wire connection from calibrator nor DUT for 4-wire resistance open calibration. -
Page 40: Capacitance Gain Adjustment Procedure
Input terminal open (remove any con- nection from the input terminals) [a] The cable capacitance between EDU34450A and calibrator must be impedance controlled with less than 100 pF of cable capacitance. For best accuracy, use only coaxial cable or shielded twisted-pair cable. -
Page 41: Frequency Gain Adjustment Procedure
2. Reset the Calibration Message (seeCalibration Message). 3. Record the new Calibration Count (see Calibration Count). 4. Press Back to exit Calibration Mode. 5. Secure the instrument with default security passcode or customized security pass code (see Calibration Security). Keysight EDU34450A Service Guide... - Page 42 This information is subject to change without notice. © Keysight Technologies 2021 Edition 1, January 2021 Printed in Malaysia EDU34450-90014 www.keysight.com...
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