Products > Test Equipment
Keysight 34465A reliability
jonpaul:
Bought a few yres ago, screen had intermitten blank fail.
Keysight replaced with a new uint, calibration cert IN WTY.
Apart from that , 100% perfect.
Jon
nctnico:
--- Quote from: CraigD73 on March 16, 2024, 12:42:24 am ---It's now 2024 has this problem been resolved with current production KS3446A DMMs?
--- End quote ---
From my email exchange with Keysight, it looks like they are using a different microcontroller as the microcontroller they used initially has been discontinued.
voltsandjolts:
As I understand it, the self-destruct feature was mainly due to:
(A) Luminary MCU on the main board self-corrupting flash memory (Note 1)
(B) STM SPEAR320 processor on the front panel failing for some reason, at least some get very hot to touch
(C) NAND FLASH on the front panel getting corrupted, sometimes recoverable by interaction over the serial port.
Keysight is the undisputed champion of FLASH corruption, perhaps not always their fault but certainly early firmware made a poor job of recovering from FLASH corruption. e.g. depending entirely on one copy of the NAND ONFI parameters, ignoring backup copies when primary failed |O
My hope (I say staring at my DMM) is that these problems have been fixed in newer dark colour meters. Certainly the main board and front panel processors have changed, we have to wait and see if there are reports of NAND corruption on these newer meters. So far, so good on my bench :-X
Note 1: TI EOL document PCN 20140630000 for the LM3S Tempest/Inferno defective MCU product line gives estimated failure rate of 0.3%
HighVoltage:
I had a fair share of NAND corrupted Keysight scopes.
But even with so many Keysight DMM 34461A, 34465A and 34470A I never had a problem with those.
Maybe the problem is larger, if these instruments are not used on a regular basis?
coromonadalix:
are they still running an WinCe thingy intheses, WinCe was notorious to wear flash memories because of too many read and write, you had to do some optimisations
many systems uncompress the wince boot file into memory, i had problems with systems who booted from some sd cards, it took a while to get a good brand
not bashing, but i'll thrust more an 34410a or 34411a way before thoses models
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