A scalar tool used to store the value of the capacitance unit farad in the electromagnetic unit system. Its characteristic is that the capacitance is very accurate and stable, and it is often used as a measurement standard, or installed in an electrical measuring instrument as a standard capacitive element. Standard electrical appliances are usually decimal, and their capacitance ranges from 1 picofarad to 1 microfarad. Under special circumstances, it can also be made into smaller or larger values, or non-decimal values.

       Determination of basic error δ of capacitor

       a. For capacitors with accuracy levels of 1, 0.5, the total measurement error caused by standard instruments, test methods and test conditions should not exceed two tenths of the allowable basic error limit, and the test results should meet the requirements of 3.1 of this standard Regulations.

       b. For capacitors of other accuracy levels, the total measurement error caused by standard instruments, test methods and test conditions should not exceed one third of the allowable basic error limit, and the test results should meet the requirements of Article 3.1 of this standard.