What are the parameters related to electrostatic measurement
1. Electrostatic voltage
Since it is easier to measure electrostatic potential in many occasions, another commonly used electrostatic parameter is electrostatic potential, and its unit is volts, but because electrostatic voltage is usually very high, a larger unit is often used - kilovolts (kV): 1kV=1000V .
Instruments for measuring electrostatic voltage are usually divided into contact type and non-contact type. Contact type is commonly used for measuring electrostatic voltage of active charged bodies such as electrostatic generators (high voltage power supplies). However, because the contact instrument will discharge the electrostatic discharge of the charged object when it is in contact with the measured object, so that the amount of charge will decrease or the capacitance of the charged object will increase. These two factors will reduce the electrostatic potential of the object, so the measured The result is quite different from the real charging situation of the object, so the more commonly used method when measuring the electrostatic voltage of many objects is to use a non-contact electrostatic voltmeter, which does not have any contact with the measured object during measurement, so The electrostatic effect on the object to be measured is very small. The commonly used instrument is the Simco FMX-004 explosion-proof electrostatic voltmeter, which can accurately and quickly measure the electrostatic voltage of the object.
2. Charge
The essence of static electricity is the existence of residual charge. Electric charge is all physical quantities concerned with the essential aspects of electrostatic phenomena. Quantities related to electric potential, electric field, and current are all physical quantities produced by the existence or movement of charges. It is often necessary to measure the charge or charge density of objects in scientific research institutes, colleges and universities, testing stations and industrial and mining enterprises. The amount of electrostatic charge is represented by electricity Q, and its unit is coulomb C. Because the unit of coulomb is too large, microcoulomb or nanocoulomb is usually used: 1 coulomb = 1000000 microcolumn, 1 microcolumn = 1000 nanocoulomb (nC).
When measuring powder charge and its charge-to-mass ratio, and measuring the performance of anti-static clothing, its charged charge must be measured. In principle, the charged quantity of an object can be measured by Faraday Jane, an electrometer and an electrostatic capacitance.
3. Resistance and resistivity
Testing the resistance and resistivity of materials is an important method to determine its antistatic performance, and there are requirements for measuring resistance or resistivity in many international and domestic standards. To test the resistance and resistivity of an object, a professional heavy hammer surface resistance tester is usually used.
Some other physical quantities include electric field strength, etc.
