本发明公开了一种用于液态铅铋电磁流量计的标定平台及其标定方法，标定平台包括铅铋合金储存罐、电磁流量计、电加热器、标定筒、液位计、氩气瓶和真空泵组成的气体回路；公开了本标定平台使用的标定方法，利用气压由铅铋合金储存罐向标定回路中第一标定筒注入液态铅铋合金，流经电磁流量计时采集到一组电压信号，采集第一标定筒中液位计通断信号；控制回路阀门，使第一标定筒中铅铋合金在重力作用下流向第二标定筒，同理测得一组电磁流量计电压信号和第二标定筒中液位计通断信号；由体积法求解回路流量，绘制电磁流量计电压信号与回路流量相关特性曲线，拟合出电压信号‑回路流量关系式；可以在回路允许的不同运行温度下标定电磁流量计。

The invention discloses a calibration platform for liquid lead-bismuth electromagnetic flowmeter and its calibration method. The calibration platform includes a gas circuit composed of lead-bismuth alloy storage tank, electromagnetic flowmeter, electric heater, calibration cylinder, liquid level gauge, argon cylinder and vacuum pump; The calibration method used by the calibration platform is disclosed. The liquid lead bismuth alloy is injected into the first calibration cylinder in the calibration circuit by using the air pressure from the lead bismuth alloy storage tank, and a group of voltage signals are collected through the electromagnetic flow meter, and the on-off signals of the liquid level gauge in the first calibration cylinder are collected; Control the loop valve to make the lead-bismuth alloy in the first calibration cylinder flow to the second calibration cylinder under the action of gravity, and measure a group of electromagnetic flowmeter voltage signals and the on-off signals of the liquid level gauge in the second calibration cylinder; Solve the loop flow by volume method, draw the characteristic curve of voltage signal and loop flow of electromagnetic flowmeter, and fit the voltage signal ‑ loop flow relationship; The electromagnetic flowmeter can be calibrated at different operating temperatures allowed by the circuit.