1. There are lots of ways to get misleading results. 2. Study the literature. 3. Some of the instrument manufacturers publish excellent applications manuals. 3.1 http://www.keithley.com/wb/201 Keithley's Low Level Measurements Handbook. 4. If you use 4-pt. linear arrays, read Valdes. 4.1 Valdes, L G., Proc. I.R.E., 42, pp. 420-427 (February 1954). 5. Have fun, but be careful how much voltage the instruments might use to produce the currents they want to see. 5.1 This applies only to high resistance measurements.
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