The shunts are characterized through a step-up procedure:
a higher current value shunt is calibrated by comparison to a
lower value shunt. The 10 mA shunt-TVC combination is
calibrated using a 10 mA CTVC. This shunt is then in turn
used to calibrate a 20 mA shunt, the 20 mA shunt is used to
calibrate a 50 mA shunt, and so on. The following graphs
show some of the experimental results.