ABM系列超声波液位变送器

特点

• 简单的按钮校准
• 忽略周边的障碍物
• 4-20mA或20-4mA输出
• 基于微处理器的可靠性
• 内置的温度补偿
• 电流回路诊断
• 现场或工作台校准

应用

• 水/废水处理
• 化学制品
• 粘性流体
• 油画
• 泥浆
• 食品和饮料

巴比特ABM系列超声波液位变送器允许简单和可靠的非接触式液位测量流体在一个水箱，水池或其他容器。 微处理器控制电路产生发送一个脉冲，从换能器的表面。 该脉冲被反射回来，从表面上的液体。“往返”渡越时间，然后转换成电流输出，这是成正比的流体水平。

该电路会自动过滤掉可能产生的坦克周边障碍物的虚假回波。 例如，一个管或梯子的“超声波锥”，但不是直接换能器的脸前将被忽略;反导系列有一个专有的电路锁定到*远的回声这将始终是液位。

电流输出（4-20mA）的功率高达750欧姆的负载。 电源电流回路是通过板上的跳线选择的领域;循环或外部24VDC电源可用于反导系列可以提供电源。

工厂可以提供数字读数自足报警/控制系统与可选的设定值。

一个单一的按钮用来设置4mA和20mA点。输出可能是成比例的（海拔）（为零= 4mA的罐底的4-20mA）或成反比（纵深）（20-4毫安具有4mA =零在罐的顶部）。

4mA和20mA点是独立的，完全可调的过单位的跨度。 校准程序的反馈是通过提供“绿色黄色红色”LED。

校准设置存储在非易失性存储器中，所以即使在单位保持校准​​功率损耗。

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• 超声波变送器手册 

ABM Series Ultrasonic Level Transmitter

Features

• Simple push-button calibration
• Ignores peripheral obstructions
• 4-20mA or 20-4mA output
• Microprocessor-based reliability
• Built-in temperature compensation
• Current loop diagnostics
• Field or bench calibration

Applications

• Water/Wastewater
• Chemicals
• Viscous Fluids
• Oils
• Slurries
• Food and Beverage

The Babbitt ABM Series Ultrasonic Level Transmitter allows simple and reliable non-contact level measurement of fluids in a tank, sump or other container. The microprocessor-controlled circuit generates a pulse that is transmitted from the transducer face. This pulse is reflected back from the surface of the liquid. The "round trip" transit time is then converted into the current output, which is directly proportional to the fluid level.

The circuit automatically filters out false echoes that may be produced by peripheral obstructions in the tank. For example, a pipe or ladder that is in the "ultrasonic cone" (but not directly in front of the transducer's face) will be ignored; the ABM Series has a proprietary circuit that locks onto the farthest echo which will always be the fluid level.

The current output (4-20mA) can power a load of up to 750 ohms. The power source for the current loop is field selectable via an on-board jumper; the ABM Series can provide the power for the loop or an external 24VDC power supply may be used.

The Factory can supply digital readouts with optional setpoints for self-contained alarm/control systems.

A single push-button is used to set the point for 4mA and 20mA. The output may be either proportional (elevation) (4-20mA with zero=4mA at the bottom of the tank) or inversely proportional (depth) (20-4mA with 4mA=zero at the top of the tank).

The 4mA and 20mA points are independent and fully adjustable over the span of the unit. Feedback for the calibration procedure is provided via a "green-yellow-red" LED.

The calibration settings are stored in non-volatile memory, so the unit stays calibrated even during loss of power.

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• Ultrasonic Transmitter Brochure