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- Keithley Applications
- Posts: 2849
- Joined: June 10th, 2010, 6:22 am
- Country: United States
and it can read down to 1e-14A.
So 500 V / 1e-14A = 50 e17 ohms.
But that is not practical.
So the offset current is about 0.4pF. So I would use that to find out the max resistance.
500V / 0.4pA = 1.25 e15 ohms.
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