Explanation of Precise Measurement of LR Series Resistors (Product Technical Guidelines) TECHNICAL NOTE
■LR resistor is an ultra-low resistance resistor of alloy body, and the resistance value distribution is 0.5m Ω~300m Ω. The accuracy of the resistance measurement system in use is particularly important. The current resistance measurement methods are mainly 4-wire measurement, of which the general measurement methods are Wheatstone bridge measurement and Kelvin bridge measurement. The accuracy of Wheatstone bridge measurement can be guaranteed when measuring high resistance, but when measuring ultra-low resistance, the measurement error is relatively large due to the influence of electrode contact resistance error. The Kelvin bridge measurement uses a series circuit to connect the electrodes, reducing the impact of contact resistance at the electrode connection point, and the measured value is closer to the actual value. In addition, when measuring metal strip chip resistors LR alloy series with low resistance value, standardized and unified measurement needle spacing, instruments, etc. are implemented to ensure consistent measurement methods to guarantee accurate measurement resistance values.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2023/8/14 |
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476 KB |
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