精密大容量电阻1282系列精密大容量电阻
额定负载20 W，范围1mΩ... 100mΩ，四端测量原理，精度0.02％，技术频率50 Hz
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Features
- 温度系数≤10 ppm / K
- 额定负载20 W
- 范围1mΩ... 100mΩ
- 四端子测量原理
- 精度0.02％
- 对于技术频率50 Hz
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Product data
型号R 1282 电阻值R 1 mΩ
10 mΩ
100 mΩ精度R 0.02 % 温度系数R ≤ ± 10 ppm/K 储存的稳定性 < ± 0.01 % over years 功率R 20 W 工作温度R 0 ... +23 ... +40 °C 具体特点R - 温度系数≤10 ppm / K
- 额定负载20 W
- 范围1mΩ... 100mΩ
- 四端子测量原理
- 精度0.02％
- 对于技术频率50 Hz
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Description
In connection with very precise digital voltmeters the model 1282 resistors are used as measuring resistors for accurate registration of direct and alternating currents up to 200 A. The compact construction supports universal application. The exceptional low temperature coefficient extends the scope of application a second time.
A typical application is the wide range of quality and reliability testing. Regular measurements give a reliable information of the quality level of parts, instruments and systems.Technologies already approved with our precision and calibration resistors - which especially guarantee a secure conduction of the dissipation heat - have been transferred to the precision high capacity resistors. Those are designed on four-wire measurement principle. The voltage path is equalized to the customized value and to an accuracy of 0.02 %, (with reference temperature = 23 °C).
At maximum load a temperature increase within the resistor occurs. This temperature increase is compensated by a large surface area of the cooling body. The heat resistance of the resistors described is 1 K/W: The temperature of the resistor rises 1 K per Watt of supplied energy. All power and limiting values of the diagrams overleaf refer to the resistor material MANGANIN®. Unfavourable installation with insufficient possibility of ventilation and cooling have to be taken into consideration accordingly.
The potential tap is effected via brass terminals with 4 mm hole. The screw-terminals for the current feed are dimensioned according to the maximum capacity. -
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