一、概述

衷心感谢您选购本公司超声波液位计！

本仪表包含多项专利技术，具有安全、清洁、精度高、寿命长、稳定可靠、安装维护方便等特点，适用酸、碱、盐、防腐、高温等各种领域。

本仪表可通过4~20mA或RS485(Modbus协议或其他定制协议)连接到显示表或各种DCS系统中，为工业的自动化运行，提供实时的液位数据。

一、Overview

Sincerely thank you for buying our ultrasonic level meter.

The meter includes several proprietary technologies, is safe and clean, with high precision and long service life, stable and reliable, and convenient to install and maintain, and is applicable to various fields of acid, alkali, salt, anticorrosion, and high temperature.

本仪表具有如下特点：

l   电路设计从电源部分起就选用高质量的电源模块，元器件选择进口高稳定可靠的器件，完全可以替代同类型国外进口仪表。

l   专利的声波智能技术软件可进行智能化回波分析，无需任何调试及其它的特殊步骤，此技术具有动态思维、动态分析的功能。

l   我公司拥有的声波智能专利技术，使仪表的精度大大提高，液位精度达到0.3％，能够抗各种干扰波。

l   本仪表是一种非接触式仪表，不跟液体直接接触，因此故障率低。仪表提供多种安装方式，用户完全可以通过本手册进行仪表标定。

l   仪表的所有输入、输出线均具有防雷、防短路的保护功能。

The meter is with following features:

l   For circuit design, high-quality power modules are selected to be as power supply parts and highly stable and reliably imported devices are used as components of the meter. It can fully replace imported foreign meters of the same type.

l   Patent sonic-wave intelligent technology software can make intelligentized echo analysis. It needs neither debugging nor other special steps. This technology has functions of dynamic thinking and dynamic analysis.

l   Our sonic-wave intelligent patent technology greatly improves the meter’s precision, and the precision of liquid level is up to 0.3%, which is enough to resist various interference waves.

l   The meter is a non-contact one and does not directly contact liquid, so the fault rate is low. The meter can be installed in several different ways, and the user can make meter calibration according to the Manual.

l   The meter’s all input and output lines must be with such protection functions as lightning protection and short circuit prevention.

二、技术指标

l           测量范围：     0～15m（根据实测量程选定）

l           盲   区：     0.25m～0.6m

l           测距精度：     0.3%（标准条件）

l           测距分辨率：   1mm

l           压   力：     4个大气压以下

l           仪表显示：    自带LCD显示液位或空间距离

l           模拟输出：     4～20mA

l           数字输出：     RS485、Modbus协议或定制协议

l           供电电压：     DC24V/AC220V，防雷装置内置

l           环境温度：    －20℃～＋60℃

l           防护等级：     IP65

二、Technical targets

l            Measuring range：       0～15m（Chosen based on actual measuring range）

l            Blind area：             0.25m～0.6m

l            Ranging accuracy：     0.3%（Standard condition）

l            Ranging resolution：     1mm

l            Pressure：             Less than four atmospheric pressure

l            Meter display：         With LCD to display liquid levels.

l            Analog output：       4～20mA

l            Digital output：       RS485, Agreement Modbus or customization agreement

l            Power supply voltage：DC24V/AC220V, lightningproof device installed inside

l            Ambient temperature：－20℃～＋60℃

l         Protection grade：     IP65

三、安装参数含义

如上图所示，仪表的探头发波打到液位后反射回探头，探头接收到后计算发波到收波的时间，得到测量距离L，仪表安装高度TH减去测量距离L将得到当前液位H。

仪表量程指仪表能够测量的距离，安装高度TH应小于量程。

仪表盲区指仪表在探头附近无法测量的区域，最高液位与探头间距应大于盲区，例盲区为0.3m，则液位与探头间距必须大于0.3m。

探头发波是个扩散过程，即有方向角，安装的时候要注意，否则可能打到池壁的凸起物或渠道边沿。

三、The meaning of installation parameters

As shown, instrument’s transducers made after the wave hit the level reflected back to transducer, the transducer receives income calculated after the hair waves to waves of time, are measured from the L, meter installation height minus the measurement of TH the distance L will be the current level H.    Meter range means the instrument can measure the distance, the installation should be less than a high degree of TH range.    Instrument blind means measuring instruments in the vicinity of the transducer can not be measured in the region, the highest level with the transducer spacing should be greater than the blind, for example: blind spot for the 0.3m, the highest level with the transducer spacing must be greater than 0.3m.

四、仪表安装原则

1）探头发射面到最低液位的距离，应小于选购仪表的量程。

2）探头发射面到最高液位的距离，应大于选购仪表的盲区。

3）探头的发射面应该与液体表面保持平行。

4）探头的安装位置应尽量避开正下方进、出料口等液面剧烈波动的位置。

5）若池壁或罐壁不光滑，仪表安装位置需离开池壁或罐壁0.3m以上。

6）若探头发射面到最高液位的距离小于选购仪表的盲区，需加装延伸管，延伸管管径

   大于120mm，长度0.35m～0.50m，垂直安装，内壁光滑，罐上开孔应大于延伸管内

   径。或者将管子通至罐底，管径大于80mm，管底留孔保持延伸管内液面与罐内等高。

四、Instrumentation Principles

1. The distance of transducer launching surface to the lowest level should be less than the purchase instrument range

2. The distance of the transducer launching surface to the highest liquid level should be greater than the purchase of the blind instrument

3. The launch surface of the transducer should be keep parallel to the liquid surface.

4. Transducer installation location should be as far as possible avoid these liquid surface fluctuations position that just under the inlet, outlet ,if It is impossible to avoid, please install guided-wave tube to aid in measuring.

5. If the pool wall or tank wall is not smooth, meter installation location should at least more than 0.5m from the pool wall or tank wall. The specific distance from the pool wall or the tank wall determined according to the actual situation.

6. If the distance of the transducer launching surface to the highest level is less than the blind area of the purchase instrument is required to install an extension tube, that diameter is greater than 200mm, and the length is 0.35m～0.50m.