Resistor resistance marking method 1, straight standard method: use digital and unit symbols on the surface of the resistor marked resistance, the allowable error is directly expressed as a percentage, if the resistance does not note deviation, are ± 20%.
2, the text symbol method: the use of Arabic numerals and text symbols have a regular combination of both to indicate the nominal resistance, the allowable deviation is also represented by text symbols. The number in front of the symbol indicates the integer resistance, and the following number indicates the first decimal resistance and the second decimal resistance in turn.
Indication of error allowed text symbol text symbol DFGJKM
Allowable deviation ±0.5% ±1% ±2% ±5% ±10% ±20%
3, digital method: In the resistor with a three-digit representation of the nominal value of the mark method. The digits are from left to right, the first and second digits are valid values, and the third digit is the index, which is the number of zeros and the unit is Europe. Deviations are usually represented by textual symbols.
4, color standard method: the use of different color bands or points in the resistor surface nominal resistance and allowable deviation. Most of the foreign resistance using color standard method.
Black-0, Brown-1, Red-2, Orange-3, Yellow-4, Green-5, Blue-6, Purple-7, Gray-8, White-9, Gold-±5%, Silver-±10 %, colorless - ±20%
When the resistance is four rings, the last ring must be gold or silver. The first two digits are valid figures, the third is the power number, and the fourth is the deviation.
When the resistance is five rings, the distance between the last ring and the front four rings is larger. The first three digits are valid figures, the fourth digit is the power multiplier, and the fifth digit is the deviation.
