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we use a Model 6221 AC and DC Current Source with a Model 2182A Nanovoltmeter to measure small resistances (mOhm) with low current (1 microA to 10 mA) at low temperature in a 4-wire configuration and with very low noise (typically < 10nV when integrating over 5 NPLC).
Is there a switch compatible with this system that could provide around ten 4-wire channels, so that we can measure ten samples at a time, but without degrading the sensitivity of the measurements ? Also is there a compatible 4x4 matrix (for van der Pauw or Hall effect) ?
It would be better if it's fast, like <100 msecs to switch from one channel to the next.
- Keithley Applications
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- Joined: June 10th, 2013, 6:00 am
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The 7168 can scan 8 channels of nanovolt signals. These are 2-wire channels. You would use a separate card to switch the current source which does not require the nanovolt buffers.
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