Hey, I just got my first two uCurrents and first time out I think I killed one! Switched it to nA range while drawing about 9uA. Now the voltage output is all screwy (technical term).
What do I need to replace to get it working again? Just the MAX4239? Will I have damaged anything else?
Why would switching it to nA-range kill it?
All you're doing is switching from 10kOhm + 10 Ohm to just the 10kOhm sense resistor.
That'd make the voltage output all screwy, but only until you change it back to uA range, it shouldn't kill anything?
(disclaimer: I haven't had enough coffee to do a decent impersonation of awake yet... )