一、概述

衷心感謝您選購本公司超聲波液位計！

本儀表包含多項專利技術(shù)，具有安全、清潔、精度高、壽命長、穩(wěn)定可靠、安裝維護方便等特點，適用酸、堿、鹽、防腐、高溫等各種領(lǐng)域。

本儀表可通過4~20mA或RS485(Modbus協(xié)議或其他定制協(xié)議)連接到顯示表或各種DCS系統(tǒng)中，為工業(yè)的自動化運行，提供實時的液位數(shù)據(jù)。

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.

本儀表具有如下特點：

l  電路設(shè)計從電源部分起就選用高質(zhì)量的電源模塊，元器件選擇進口高穩(wěn)定可靠的器件，完全可以替代同類型國外進口儀表。

l  專利的聲波智能技術(shù)軟件可進行智能化回波分析，無需任何調(diào)試及其它的特殊步驟，此技術(shù)具有動態(tài)思維、動態(tài)分析的功能。

l  我公司擁有的聲波智能專利技術(shù)，使儀表的精度大大提高，液位精度達到0.3％，能夠抗各種干擾波。

l  本儀表是一種非接觸式儀表，不跟液體直接接觸，因此故障率低。儀表提供多種安裝方式，用戶完全可以通過本手冊進行儀表標(biāo)定。

l  儀表的所有輸入、輸出線均具有防雷、防短路的保護功能。

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 replac 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、技術(shù)指標(biāo)

l          測量范圍：     0～15m（根據(jù)實測量程選定）

l          盲  區(qū)：     0.25m～0.6m

l          測距精度：     0.3%（標(biāo)準(zhǔn)條件）

l          測距分辨率：   1mm

l          壓  力：     4個大氣壓以下

l          儀表顯示：    自帶LCD顯示液位或空間距離

l          模擬輸出：     4～20mA

l          數(shù)字輸出：     RS485、Modbus協(xié)議或定制協(xié)議

l          供電電壓：     DC24V/AC220V，防雷裝置內(nèi)置

l          環(huán)境溫度：    －20℃～＋60℃

l          防護等級：     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、安裝參數(shù)含義

如上圖所示，儀表的探頭發(fā)波打到液位后反射回探頭，探頭接收到后計算發(fā)波到收波的時間，得到測量距離L，儀表安裝高度TH減去測量距離L將得到當(dāng)前液位H。

儀表量程指儀表能夠測量的距離，安裝高度TH應(yīng)小于量程。

儀表盲區(qū)指儀表在探頭附近無法測量的區(qū)域，最高液位與探頭間距應(yīng)大于盲區(qū)，例盲區(qū)為0.3m，則液位與探頭間距必須大于0.3m。

探頭發(fā)波是個擴散過程，即有方向角，安裝的時候要注意，否則可能打到池壁的凸起物或渠道邊沿。

三、The meaning of installation parameters