Discussion Overview
The discussion focuses on methods for detecting very small electrical currents in the nano or pico ampere range, exploring available devices and techniques for measurement, including considerations for measuring small magnetic flux variations and floating measurements.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- One participant inquires about practical methods for detecting nano or pico amperes and asks if there are suitable devices like galvanometers.
- Another participant suggests that picoammeters, such as those from Keithley, can measure these small currents.
- A follow-up question raises the need for devices that can measure small magnetic flux changes without relying on induced AC current measurements, indicating a preference for DC measurement methods.
- A further inquiry is made regarding the limitations of commercial picoammeters, specifically their voltage range for floating measurements, which is noted to be around 500V to 700V.
Areas of Agreement / Disagreement
Participants express varying needs and concerns regarding the measurement of small currents and magnetic flux, with no consensus on the best approach or device for floating measurements.
Contextual Notes
Limitations include the specific voltage range of commercial picoammeters and the potential challenges in measuring small magnetic flux variations without inducing AC currents.