NEWTRY Decade Rotary Resistance Box 0-9999.9Ω Adjustable Lab Resistor Substitution Box Precision 1W Variable Knob Switch

Pay with

About NEWTRY Decade Rotary Resistance Box

Descriptions Resistor box is an indispensable instrument in electrical experiment. It can be used by school students to carry out the following electrical experiments: Verify the Euclidean law of some circuits. Use as additional resistance to expand the range of voltmeter. Used to measure unknown resistance. Used as a known resistor to regulate the required current in a circuit. It is used to measure the EMF and internal resistance of power supply. Resistance box is sealed with bakelite. The resistance value conversion is in the form of knob switch, which can achieve the purpose of resistance value conversion by rotating the brush to different positions. The resistive elements of the instrument are made of highly stable precision alloy manganese-copper wires wound on the ceramic skeleton in a Inductance-free manner. After strict screening, detection, aging and immersion treatment, the resistance value is stable and correct. When in use, access the circuit through the two terminals on the panel, adjust the four knobs to get a resistance value. The reading of the indication point of each knob is multiplied by the multiple of the above, and is the resistance indication value. Technical Parameter 1. Accuracy grade: level 1 2. Adjustable range of resistance: 0-9999.9Ω, minimum step value is 0.1Ω 3. Operating temperature: 0-40 ° C 4. Relative humidity: 25%-80% 5. Zero position resistance: R050MΩ