Jandel 4-point probe

• The probe's outer two electrodes pass current and the inner two measure voltage.
• The goal of the measurement is to measure sheet resistance
• my sop
• somebody else's SOP
• You can use a resistor to test if the instrument is working ok. I did it by flattening the leads in the FTIR press. V = resistor resistance * current passed through it. Press the ohm's/square button to see voltage