Some physical knowledge about static electricity
A. The amount of charge
The amount of electricity used to indicate the amount of electrostatic charge is expressed by Q, and its unit is Coulomb C. Because the unit of Coulomb is too large, a micro library or a nano library is usually used.
1 Coulomb = 1000000 micro libraries
When measuring the charge and charge-to-mass ratio of the powder, and the performance of anti-static clothing, the amount of charge must be measured.
B. Electrostatic voltage
Since it is easy to measure electrostatic potential in many occasions, another commonly used electrostatic parameter is electrostatic potential, and its unit is volts, but because the electrostatic voltage is usually very high, a larger unit-kilovolt (kV) is often used to measure the static electricity of an object The commonly used method for voltage is to use a non-contact electrostatic voltmeter, which does not touch the object to be measured during measurement, so the electrostatic effect on the object to be measured is small. Commonly used meters are the EST101 explosion-proof electrostatic voltmeter.
2. What are the main instruments and equipment for measuring static electricity?
The instrument for measuring the amount of electrostatic charge has a charge meter, and an electrostatic voltmeter can be used to measure the electrostatic potential. There are many instruments for measuring static electricity, such as high resistance meters, charge meters and so on.
3. What are the parameters for measuring the electrostatic properties of materials?
The commonly used parameters for measuring how much an object is charged are the amount of electrostatic charge and electrostatic voltage, but when measuring the antistatic performance of plastic, rubber, antistatic floor (surface), carpet and other materials, usually resistance, resistivity, volume resistivity, surface Resistivity, charge (or voltage) half-life, electrostatic capacitance, dielectric constant, etc., among which the most common and reliable ones are resistance and resistivity.