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一般金属熔炼的测温方法多利用动圈式测温仪,或高温辐射计,由于这些测试设备误差大,价格又比较贵,故影响广泛应用,因而我们试制了即经济,又实用,且易实现的一种组合式高温测温计。高温计的电原理如图1所示,它包括DT—830型数字式万用表,接口电路(插接式),感温元件(快速热电偶)及补偿导线等四部份。工作原理为,从热电偶输出的直流毫伏信号,通过接口电路,按一定比例系数转换成温度值,显示在数字万用表上。感温元件是分度号为LB-3铂铑—铂热电偶,它的T℃=f(V_(mv))
The general method of temperature measurement of metal smelting more use of dynamic thermometer, or high temperature radiometer, due to the error of these test equipment, the price is more expensive, so the impact of a wide range of applications, so we trial production that is economical and practical, and easy A combination of high temperature thermometer to achieve. The thermometer’s electrical principle is shown in Figure 1, which includes four parts: DT-830 digital multimeter, interface circuit (plug-in type), temperature sensing element (fast thermocouple) and compensation wire. The working principle is that the DC millivolt signal output from the thermocouple is converted into a temperature value according to a certain proportion coefficient through the interface circuit and displayed on the digital multimeter. Temperature sensing element is sub-degree number for the LB-3 platinum rhodium - platinum thermocouple, its T ℃ = f (V_ (mv))