A plug-type resistance box allows for precise adjustment and measurement of resistance values by inserting or removing metal plugs. This specific model provides resistance values up to 200 ohms, making it suitable for various applications where accurate resistance control is necessary.
Features
Precision Resistors:
Type: High-precision wire-wound or carbon composition resistors.
Accuracy: Typically within ±1% or better, ensuring reliable and consistent resistance values.
Material: Often made from materials like manganin or nichrome wire, known for their stability and low temperature coefficient.
Construction:
Body: Made from durable and insulating materials such as Bakelite, phenolic resin, or high-quality plastic.
Plugs: Brass or nickel-plated brass plugs, providing excellent conductivity and resistance to corrosion.
Terminals: Brass or nickel-plated terminals for robust and reliable electrical connections.
Resolution: The smallest increment of resistance that can be set, typically dependent on the configuration of the internal resistors.
Operation:
Adjustable Resistance: Resistance is adjusted by inserting or removing plugs. Each plug corresponds to a specific resistance value, allowing for a wide range of resistance settings.
Clear Labeling: Resistance values and plug positions are clearly labeled for ease of use.
Applications:
Educational: Demonstrating principles of electrical resistance, Ohm’s law, and other fundamental electrical concepts in physics and engineering labs.
Calibration: Calibrating electrical instruments and devices to ensure their accuracy.
Experimental: Used in experimental setups requiring precise resistance adjustments.
Maintenance:
Cleaning: Regular cleaning of plugs and terminals to maintain good electrical contact and accurate resistance values.
Calibration: Periodic calibration checks to ensure the resistors maintain their accuracy over time.
Specifications
Maximum Resistance: 200 ohms
Resistance Increments: Typically includes multiple resistors of different values (e.g., 1, 10, 50 ohms) to achieve the total resistance.
Accuracy: ±1% or better
Dimensions: Varies by manufacturer but generally compact for ease of use and portability.
Weight: Lightweight for portability while being robust enough for laboratory use.
Summary
A plug-type resistance box with a maximum resistance of 200 ohms is an essential tool for precise resistance measurement and adjustment. Its construction ensures durability and accuracy, making it valuable for educational, calibration, and experimental applications. Proper maintenance and calibration are key to maintaining its reliability and performance.
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