A resistance box is a device that measures and compares electrical resistance, or provides variable electrical resistance for circuits. It’s also known as a decade box or resistance substitution box.
Here are some features of a resistance box:
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Adjustable resistance
A resistance box has a set of resistance values that can be manually adjusted or switched to achieve specific resistance levels.
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Calibration
Many resistance boxes are manufactured according to industry standards and are traceable to national or international standards organizations.
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Applications
Resistance boxes are used for a variety of purposes, including calibrating other electrical measurement instruments, and modifying the performance of electric motors.
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DesignResistance boxes often have a dial assembly mounted on a panel and enclosed in a box to protect it from dust and acid fumes.
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