Figure 9From: Measurement and monitoring of electrocardiogram belt tension in premature infants for assessment of respiratory functionMeasurement to determine the linearity of the device. Weights are added at 25 gm increments after the device was calibrated to 1 gm tension = 1 mV. The output was linear in the range from 25 g–225 g (r2 = 0.99).Back to article page