In the voltage measurement, the appropriate voltage sensor should be selected according to the specific situation. The basic principle of voltage sensor selection is:
1 The range of the measured voltage is an important basis for selecting the voltage sensor, so there must be a wide enough range of voltage measurement;
2 should have a wide enough frequency range and high enough measurement accuracy;
3 has a sufficiently high input impedance, the input resistance of the voltage sensor is the extra load of the circuit under test, in order to reduce the influence of the access of the measurement circuit on the circuit under test, it is required to have a higher input impedance;
4 should have a high anti-interference ability; the measured voltage often contains some noise interference and other components that do not need to be measured.
