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3458As Drifting Out of Calibration

Question asked by jpbledsoe001 on Oct 3, 2012
Latest reply on Mar 25, 2013 by JohnPhillips
We've had some problems with 3458As drifting out of calibration for Resistance (1k and 100k ranges), DC voltage (1V, 10V, -10V), and AC voltage (3V at 8 MHz, for example). The "% of Tolerance" are as high as 242 %. So far, the cal department has successfully brought them back into tolerance.

Has anyone else noted calibration issues with the 3458A? Is the recommended cal cycle = 1 year?