This paper analyzes the metering error of floating roof tank caused by the floating tray to guide the installation of liquidometer.

对浮盘所造成的浮顶罐计量误差进行了分析，用以指导液位仪安装。

An analysis is made of the problem that the metering error is substantial in custody transfer metering of crude oil with low water content.

分析了原油交换计量过程中存在低含水状态下计量误差较大的问题。

It is considered that effective measures should be taken to eliminate metering error, reduce the loss of crude oil in order to cut down economic loss.

针对一些石化企业原油需要油船运输的特点来分析途耗形成的原因，通过采取相应措施，可以减少计量误差，降低途耗，减少经济损失。

The metering error considers the non linear effect of the voltage coil and current coil in watt hour meter under different order of harmonics and different distortion degree of input waveform.

计量误差考虑了电度表电压线圈和电流线圈在不同的谐波次数以及谐波大小时的非线性效应。

The article mainly introduces the composition, working principle and shows the metering course of this system. The article also makes the error analysis of the system measurement.

本文主要介绍了该系统的组成和工作原理，并用实例阐述了系统的计量过程，最后进行了系统的计量误差分析。

The ramp metering rate is determined by the PID controller whose parameters are tuned by fuzzy logic according to the density tracking error and error variation.

斜坡根据密度跟踪误差和误差变化情况，通过模糊逻辑对控制器参数进行调整，确定了测量速度。

PT secondary voltage step-down is one of the reason which causes the comprehensive error of the electric energy metering equipment.

而PT二次压降又是引起电能计量装置综合误差的直接原因之一。

TA field calibration method for power metering device is given. By calibrating the error of the reactive power metering, the error of active power metering can be indirectly calibrated.

本文给出了一种电能计量装置现场校验的方法，通过对三相电能表无功计量误差的校验，可以间接地求得其表计的有功计量误差。

In power system, it can excite partial parallel resonance or serial resonance, enlarge the harmonic wave, trigger relay protection system in error and disturb electric power energy metering equipment.

在电力系统，它可以刺激局部并联谐振或串联谐振，放大谐波，引发继电保护系统误差和扰乱电力能源计量设备。

The utility model relates to an instrument for detecting the error of the coaxiality, belonging to the metering detection device.

一种检测同轴度误差的仪器，属计量检测设备。