A method of manufacturing a rotary decade fine-tuning resistance box
A fine-tuning resistance and rotary technology, which is applied in the direction of resistance elements including multiple resistance elements, can solve the problems that the bridge cannot be adjusted, the display value is discontinuous, and it will jump, so as to improve the measurement accuracy, accuracy and resolution. The effect of increasing the rate and improving the accuracy level
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[0015] a kind of like figure 1 The rotary decade fine-tuning resistance box shown (hereinafter referred to as the fine-tuning resistance box) includes multiple resistance plates and a fine-tuning resistance plate. The fine-tuning resistance plate includes dynamic and static contact switches K 4, standard resistance R S 2, 10 auxiliary resistors R with different resistance N 3. It can also be an improvement on the existing resistance box, which will be described below with the improvement of the standard resistance box ZX25a as an example. The main technical indicators of ZX25a are: it is composed of 6 decimal rotary resistance discs 1 in series, continuously adjustable, the adjustment range is (0.01~1111.11) Ω, the highest accuracy is 2 / 10,000; the accuracy of 2 digits after the decimal point is the error 1% and 5% respectively. The output of the resistance value is connected by the complex moving and static contacts of the rotary switch K, and the contact resistance r wi...
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