Hello, hope someone can help me giving a clue to where can be the problem. I have a fluke 343a, usually the unit startup is normal and well-behaved but recently sometimes when I turn it on the output overshoots badly and then slowly returns in control. This happens if I let the unit stay unpowered for few days. Once I power it up the output goes down, then up and slowly recovers, here I recorded the voltage vs time, on the left I turned the switch from off directly to "meter voltage" position: http://www.flickr.com/photos/14336723@N08/8112014154/ once powered for few seconds the problem disappears and the subsequent power on cycles are normal, this was recorded few seconds later than the previous: http://www.flickr.com/photos/14336723@N08/8112014110/ Troubleshooting is a little time consuming, beacuse the problem shows only after 3-4 days of inactivity and the culprit component probably seem still working. Seem something screws up the control loop parameters. Could it be a bad capacitor somewhere? Thank you, Fabio Eboli. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.