The measuring system is composed of instrumental amplifier AD623 and transmitter XTR115 to amplify weak signal and transmit current loop signal.
本应变测量系统由仪表放大器ad623和电压电流变送器XTR115构成，实现弱信号放大和电流环信号传输。
Flow is measured via an orifice plate metering run with a differential pressure transmitter providing feedback to the control loop.
这需要比例调节阀和流量测量形成的回路控制。
When supplying a small transmitter loop device with power current, the strength of signal as same as that produced by a large transmitter loop can be obtained.
当对小发射回线装置供以大电流时，同样可以得到和大发射回线相当的信号强度。
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