Keysight Technologies Truevolt 34461A Quick start guide

ADMINISTRATIVE INFORMATION
ACTION X ON SPECIFIED FAILURE
CATEGORY: [[]] AGREEABLE TIME
STANDARDS
LABOR: 1 Hour
LOCATION [[]] CUSTOMER INSTALLABLE
CATEGORY: [[]] ON-SITE (active On-site contract required)
X SERVICE CENTER
[[]] CHANNEL PARTNERS
SERVICE: X RETURN
INVENTORY: [[]] SCRAP
[[]] SEE TEXT
USED [[]] RETURN
PARTS: [[]] SCRAP
[[]] SEE TEXT
AVAILABILITY: PRODUCT’S SUPPORT LIFE
NO CHARGE AVAILABLE UNTIL: 17 April 2019
X Calibration Required
[[]] Calibration NOT Required
PRODUCT LINE: GM
AUTHOR: WY
ADDITIONAL INFORMATION:
© Keysight Technologies 2015-2018
Modification Recommended Service Note
Version 1.2 | April 17, 2018| Page 1of 2
Modification Recommended
Service Note
34461A-05
34461A Digital Multimeter, 6½ Digit
Serial Numbers: MY50000000-MY57210900
The Problem –Keysight 34460A/34461A/34465A/34470A Digital Multimeter with firmware version
below “FW 2.17” may experience ACV out of specification.
Parts Required:
NONE
Supersedes:
NONE

© Keysight Technologies 2015-2018
Modification Recommended Service Note
Version 1.2 | April 17, 2018| Page 2of 2
Situation:
User may experience ACV out of specification when frequent function changing from other
measurement functions to ACV. This happens mostly during automated process causing the
component U507 to heat up and ACV measurement to drift out of specification.
This has been resolved in Firmware 2.17 and above.
Solution/Action:
For units out of specification, contact your nearest local Keysight Service Center to send unit for repair.
(Remark : Please ensure all the units currently in use are loaded with FW 2.17 and above)
At Keysight service center:
1. Perform standard verification using STE9000.
2. If unit fails at ACV test points, set DMM function to ACV and manual range 1V.
3. Provide 1V @ 1kHz input into the DMM. If DMM measured values are hovering around 40% of
full scale then disassemble the unit and perform the following verification steps:
i. After power on, measure the body temperature of U507 and check if it rises to more
than 100C within 20seconds. This indicates a defective U507.
ii. Visual inspect if the soldering at U507 turns yellowish. This also indicates a defective
U507.
4. Replace the component U507 (1826-3738).
5. Perform self-test, full calibration (adjustments and verification). Ensure all tests pass with no
errors.
6. Provide 1V @1kHz input into the DMM again, then measure ACV value should be close to 1V.
Revision History:
Date
Service
Note
Revision
Author
Reason for Change
17 Apr 2018
05
WanYee
As Published