Fast pulsed electrical sensors are the base for a large pulsed power device running safely and stably. It is very important for fast pulsed electrical sensors to study the calibration technology so as to help get the accurate running parameters for pulsed power device. By analyzing the measuring environment of different sensors

we put forward two methods of calibration using the pulsed rectangle theory of coaxial line

such as on-line calibration and off-line calibration.Furthermore

the on-line calibration method is suitable for the sensors that are remarkably affected by stray parameters

such as capacitors with divided voltage and differential rings. However

the off-line calibration method is fit for the sensors that are slightly affected by stray parameters

such as Rogowski and low resistance shunt. There are the same schematic of discharge circuit for both of the on-line and off-line calibration methods

which have nanosecond rise time of rectangle pulsed. Finally

we analyze the uncertainty factors of discharge circuit and discuss the method of uncertainty analysis. The results will have important values for fast pulsed electrical sensors to form a normalization method of calibration.