Figure 3 | Scientific Reports

Figure 3

From: Wrist-wearable bioelectrical impedance analyzer with miniature electrodes for daily obesity management

Figure 3

Contact resistance compensation method. (a) 4-point measurement mode, (b) 2-point measurement mode, and (c) contact resistance compensation effect. (|Zbody|= 1 kΩ, |Zi|= 2 MΩ, Rs = 50 kΩ). Zbody measured impedance, Zi input impedance of the voltmeter, Rs output impedance of the current source, Rc contact resistance, I current, VM measured voltage, α the size ratio of voltage to current electrode, β the size ratio of finger to wrist electrode.

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