Resistor verifying system
A technology of resistance and resistance value, applied in the direction of measuring resistance/reactance/impedance, measuring electrical variables, measuring devices, etc., can solve problems such as inaccurate control of sampling resistance, and achieve the effect of being suitable for promotion and reducing calibration errors.
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[0021] Such as figure 1 A resistance calibration system shown includes: a reference resistance whose resistance value is known at 20°C; a resistance to be measured; connected to both ends of the resistance to be measured and used to apply a constant voltage U across the resistance to be measured Constant voltage source; connected in series in the loop formed by the resistance to be measured and the constant voltage source, an ammeter for detecting the loop current I of the resistance to be measured; a temperature sensor for detecting the current ambient temperature t; connecting the constant voltage source, the ammeter and The temperature sensor is used to obtain the first calculation unit of the resistance value R of the resistance to be measured under the current ambient temperature t by using the formula R=U / I according to the constant voltage U applied to both ends of the resistance to be measured and the current I of the circuit; Connect the temperature sensor, be used to...
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