From b5e590c928a7487b798ca3f51a4e624d2aec6b06 Mon Sep 17 00:00:00 2001 From: xans Date: Wed, 2 Oct 2024 23:45:11 +0200 Subject: [PATCH] Update readme.md --- readme.md | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/readme.md b/readme.md index 3be2199..307cefe 100644 --- a/readme.md +++ b/readme.md @@ -39,6 +39,11 @@ Now, the resistors for this amp seemed to be affecting the pass or fail, replaci ## Replacing the capacitors To save the meter from an early demise, I replaced all the capacitors, and indeed some seemed to be leaking already, I was lucky to replace them before the corrosion got worse. +

+ + +

+ Another healthy upgrade I did was to update the firmware to the latest version, which improved the accuracy of the meter to some extent due to the various mathematical updates to said firmware. In the service note [here](3458-WorkLog/SN12C.pdf) one can find the fixes listed. But as a quick overview on some fixes from Rev 4 to Rev 9 are: - Revision 8,X: Period measurement correction - Revision 7,X: Resets line frequency to 60Hz @@ -48,8 +53,7 @@ Another healthy upgrade I did was to update the firmware to the latest version, - Revision 5,X: Sending “AZERO ONCE” does not always cause the 3458A to immediately make the autozero measurement.

- - +

## U180 drift evaluation