LS300流速仪简介 -

声学多普勒流速仪一、产品简介声学多普勒流速仪是应用于河流、明渠及管道等工况的流速流量检测仪器。

其采纳超声波探测技术，测量精度高、稳定性好、受环境因素影响小，无转动件、维护频次低、工作牢靠性高，是便携流速流量测量产品。

二、原理多普勒效应，发射和接收的超声波频率差与流速建立关系，超声波发射与接收的时间差与液位建立关系，静压式液位用于需要测量液位量程较大的工况，环境温度测量用于修正超声波实际传播速度。

三、产品特点传感器支持瞬时流量与累计流量功能能测静止水的流速能测非满管、满管及明渠的流量能测矩形、圆形、梯形、三角形截面的流量流速测量范围宽，0～10m/s，双向流速测量精度高，1mm/s误差超声测量液位精度高，误差1mm（2m以内）纯物理方法测量，免标定，免校准支持静压测液位支持温度弥补流速测量与液位测量ModbusRTU协议传感器防护等级IP68，支持长期水下工作便携式方案：传感器+手持机+测量杆，手提箱容纳全部配件手提箱尺寸：435*320*135mm四、产品参数主机参数：尺寸187*91*30mm重量0.3kg存储温度—20℃～60℃相对湿度5%～85%（无冷凝）防护等级IP67充电方式直充待机时长连续工作8小时显示参数流速、液位、温度、流量现场显示带背光的4.3寸触摸屏数字接口RS485接口，Modbus协议。

传感器参数：流速量程0～10m/s，双向流速判别率0.001m/s流速精度0.001m/s（流速=5m/s时）；0.02m/s或实际峰值速度的0.3%（采纳较大值）（流速5m/s时）超声液位量程6.5m超声液位精度0.001m超声液位判别率0.0005m静压液位量程0～10m静压液位精度0.1%FS静压液位判别率0.001m温度量程—20～60℃传感器尺寸165*50*29.5mm安装专用支架材质金属，塑料，橡胶防护等级IP68供电直流12V/24V功耗测量时70mA；休眠时25mA通信接口RS485，Modbus工作温度—20～60℃工作压力最大6Bar防雷支持防浪涌支持E M I抑制支持五、应用领域海绵城市、河长制管理、内河监测、自然河流、明渠、管道、养殖等场景。

一、仪器简介LS1206B型便携式流速流量仪供测定流水中预定测点的时均流速。

本仪器造型轻巧，结构紧密，携带方便，适用于河流、管道、排灌渠道、水利调查和径流实验等。

二、技术指标1．旋桨回转直径：Φ70mm2．旋桨水力螺距：H=120mm3．仪器起转速：V0≤0.05m/s4．仪器测速范围：0.05～8m/s5．仪器工作水深：0.1～1.6m （测杆） 0.1~20m (铅鱼）6．检定精度：公式均方差m≤±1.5% V<0.2m/s时，相对误差δ≤±5%7．讯号频率：每转一个讯号8．使用环境水温：0～40℃9．连续工作时数：10h10．显示：汉字液晶显示，4行32位11．工作电源：7.2V\4200mAh,可充电12.耐腐性强、可靠性高，安全性符合国标要求。

三、仪器结构感应部件：三叶螺旋桨，用于感受水流速度传讯机构：旋桨转数转为电脉冲讯号，供计数用尾翼：平面翼舵用于明渠测流时仪器水平定向测杆：用预测水深，测杆顶端装有汛号转换插座四、工作原理当水流作用到仪器感应元件旋桨时，旋桨即产生回转运动。

水流速度快慢变化，旋桨转速也随着快慢变化，它们之间存在一定的函数关系。

此关系通过流速仪检定水槽实验确定。

五、配置1、LS1206B 通用水文测算仪1台2、旋浆流速仪传感器 1台4、尾翼部件 1个5、信号线1根6、扳手（27mm） 1只7、大小起子各1只8、鉴定证书1份9、说明书 1份LS1206B型便携式流速仪使用说明书前言须知：感谢您选用本公司LS1206B型便携式流速仪。

在使用仪器前请您详细阅读本说明书，从中可以获得有关仪器性能、使用方法以及维护等方面的信息，这会有助于您更好的使用该仪器。

一、仪器简介LS1206B型便携式流速流量仪（简称便携式流速仪）是专门为水文站、厂矿、环保监测站、农田排灌、水文地质调查等部门在野外进行明渠流速流量测量而研制的。

便携式流速仪主要由旋桨式流速传感器(或其它型号的旋杯旋桨流速仪)、LS1206B型流速测算仪、0.4m×4Ф16测杆组成。

超声波多普勒流速仪一、产品和技术参数1.1 产品简介超声波多普勒流速仪是在管道、渠道或者河流内测量水的流速的设备，主要应用于以下范围：·洪涝灾害监测·污水排放·天然的河溪·市政给排水·水量流失/渗入监测·灌溉流程监测·河口&潮汐的研究·渔业/水利·海岸侵蚀研究·/暗渠流程监测·道路排水监测·运河流程研究·江河流程监测图1.1.1 超声波多普勒流速仪可以根据需要提供电池盒，以便在供电不方便的地区提供电源。

可以根据需要提供GPRS无线传输套件，以便在后台服务器上查看现场检测到的数据。

1.2技术参数型号：DY-CURRENT VELOCITY(根据不同的功能，型号会有所不同)结构：分体式；测量种类：流速、水深、水温用途：在线式测量、在线式监测、自动记录、数据遥传（选配件）流速范围：0.02m/s～5.00m/s(最小水深：8cm)；测量分辨率：1mm/s；精度：测量流速的±2～3% ；水深测量：0.00～5m；分辨率：2mm 精度：±0.5%；温度范围：0～60ºC；分辨率：0.1ºC；流量范围：无流量测量功能供电：10～14VDC；输出信号：RS485 MODBUS协议；无线传输(可选件)：GPRS型RTU无线传输器传感器配套电缆长度：10米；被测水道类型：管道，渠道，天然的溪流、河流；液体酸碱度要求：PH值在5～7之间。

液体温度要求：0～60℃液体压力要求：自然环境状态下，1个标准大气压提示：水凝固或者接近凝固状态下无法测量流速。

1.3测量状态和接线通电后60秒钟以后出数据，之后每10～15秒钟出一次测量数据。

对于超声波多普勒流速仪传感器供电是11～14VDC，供电电流160mA。

电缆是四芯屏蔽线，电源两根线，485信号两根线。

INSTRUMENTSDESIGN FEATURESTeledyne Hastings Instruments (THI) prod-ucts represent over 55 years of experience in the design and manufacture of mass flow products. The 300 Series is a culmination of this experience with patented technologies that make these the finest flowmeters and controllers available today.The THI Mass Flow 300 Series products are designed to accurately measure mass flow without corrections or compensations for gas pressure and temperature. They are accurate to better than ±1.0% of full scale. THI mass flow instruments do not require any periodic maintenance under normal operating conditions with clean gases. No damage will occur from the use of moder-ate overpressures (~500 psi) or overflows. Instruments are normally calibrated with the appropriate standard calibration gas (air), then a gas conversion factor (GCF) is used to adjust the output for the intended gas. Special calibrations for other gases, such as oxygen, helium and argon, are available upon special order.The 300 Series products contain a number of features that set them apart from other available instruments: (1) They are inherently linear; no linearization circuitry is employed. Should recalibration in the field be desired (a calibration standard is required), the cus-tomer needs to simply set the zero and span points. (2) The output signal is linear for very large overflows and will not come back on scale when a flow an order of magnitude over the full scale flow rate is measured. (3) The instrument incorporates a remov-able/replaceable sensor module. (4) The unit has very fast settling times.Models HFM-305,HFC-307FEATURES• Range — 1000-2500 slm (Air Equivalent); Higher Flows Available • ±1.0% of Full-Scale Accuracy 1• Rapid Settling Times: HFM-305 ≤ 0.4 seconds HFC-307 ≤ 2.0 seconds • Operating Pressures to 500 PSI • NIST Traceable Calibration APPLICATIONS• Gas Blending • Research• R&D and Process Flows •Pollution MonitoringHFM-305HFC-307Teledyne Hastings Instruments reserves the right to change or modify the design of its equipment without any obligation to provide notification of change or intent to change.1See Product Manual for critical information on instrument accuracy and the use of GCFs (gas conversion factors). Stated accuracy is for nitrogen or other gas specific calibration and use with this gas only.Kalrez ® is a registered trademark of Dupont Dow Elastomers L.L.C.Swagelok ® is a registered trademark of Crawford Company.VCR ® is a registered trademark of Cajon Company.VCO ® is a registered trademark of Cajon Company.Viton ® is a registered trademark of Dupont Dow Elastomers L.L.C.DESIGN FEATURES (cont)Optional FeaturesFittings–VCR ®, VCO ®and Swagelok ®Cleaned for oxygen serviceAccessoriesPower supplies/readouts Flow totalizers Alarm set pointsInterconnecting cables*Note: After changing components, instruments require recalibration to meet accuracy specifications.Model HFM-305Model HFC-307All dimensions shown are in inches [mm].Your Customer Service RepresentativeTelephone: (757) 723-6531 Toll Free: (800) 950-2468 Fax: (757) 723-3925World Wide Web: E-mail: *********************************P.O. Box 1436Hampton, VA 23661PB 152-10/05 © Teledyne 2005 All Rights Reserved.Typical instrument ordering/options number:Model No. Circuit Output FittingsSeals Pressure CalibrationBoard TypeHFM-305010102010101Order No.OptionsCircuit Board 01 Pinout H (Standard)02 Pinout U 03 Pinout M Output01 0-5 Volts (Standard)024-20mAOrder No.OptionsFittings 01 1” VCR ®02 1” Swagelok (Standard)03 1” VCO ® Seals01 Viton (Standard)02 Kalrez ®03 Neoprene 04Buna NSelection ChartRange InformationRange _____________________________Flow Units __________________________Gas _______________________________Standard Conditions* _________________*Referenced to standard temperature and pressure (0°C and 760 Torr, respectively).Order No. OptionsPressure 01 500 psi (Standard) Calibration Type 01 NIST 5 Point (Standard)02 NIST 10 Point 03 NIST 20 Point 04 CurveTypical instrument ordering/options number:Model No. Circuit Output FittingsSeals Pressure CalibrationBoard TypeHFC-307010102010101Order No.OptionsCircuit Board 01 Pinout H (Standard)02 Pinout U 03 Pinout M Output01 0-5 Volts (Standard)02 4-20mA 03I/O 4-20mAOrder No.OptionsFittings 01 1” VCR ®02 1” Swagelok (Standard)03 1” VCO ® Seals01 Viton (Standard)02 Kalrez®03 Neoprene 04Buna NSelection ChartOrder No. OptionsPressure 01 500 psi (Standard) Calibration Type 01 NIST 5 Point (Standard)02 NIST 10 Point 03 NIST 20 Point 04 CurveRange InformationRange _____________________________Flow Units __________________________Gas _______________________________Upstream Pressure ___________________Downstream Pressure _________________Is downstream pressure dependent on flowresistance? Y/N ___________________Standard Conditions* _________________*Referenced to standard temperature and pressure (0°C and 760 Torr, respectively).。

中国灌区协会“全国灌区量水技术研讨班”教材流速仪测流法及水工建筑物量水率定郭宗信河北省石津灌区管理局第一章流速仪测流法第一节流速仪测流的基本方法与测线布设流速仪测量河渠流量是利用面积～流速法，即用流速仪分别测出若干部分面积的垂直于过水断面的部分平均流速，然后乘以部分过水面积，求得部分流量，再计算其代数和得出断面流量。

从水力学的紊流理论和流速分布理论可知，每条垂线上不同位置的流速大小不一，而且同一个点的流速具有脉动现象。

所以用流速仪测量流速，一般要测算出点流速的时间平均值和流速断面的空间平均值。

即通常说的测点时均流速、垂线平均流速和部分平均流速。

（一）基本方法流速仪测流，在不同情况或要求下，可采用不同的方法。

其基本方法，根据精度及操作繁简的差别分为精测法、常测法和简测法。

1.精测法：精测法是在断面上用较多的垂线，在垂线上用较多的测点，而且测点流速要用消除脉动影响的测量方法。

用以研究各级水位下测流断面的水流规律，为精简测流工作提供依据。

2.常测法：常测法是在保证一定精度的前提下，在较少的垂线、测点上测速的一种方法。

此法一般以精测资料为依据，经过精简分析，精度达到要求时，即可作为经常性的测流方法。

3.简测法：在保证一定精度的前提下，经过精简分析，用尽可能少的垂线、测点测速的方法叫简测法。

在水流平缓，断面稳定的渠道上可选用单线法。

（二）测线布设测流断面上测深、测速垂线的数目和位置，直接影响过水断面积和部分平均流速测量精度。

因此在拟订测线布设方案时要进行周密的调查研究。

国际标准规定，在比较规则整齐的渠床断面上，任意两条测深垂线的间距，一般不大于渠宽的1/5，在形状不规则的断面上其间距不得大于渠宽的1/20。

测深垂线应分布均匀，能控制渠床变化的主要转折点。

一般渠岸坡脚处、水深最大点、渠底起伏转折点等都应设置测深垂线。

测速垂线的数目与过水断面的宽深比有关。

精测法的测速垂线数目与宽深比的关系式为：BN0=2D式中：N0——测速垂线数目；B——水面宽；D——断面平均水深。

检测报告注意事项1、本检测报告无我单位CMA章、检测报告专用章无效。

2、本检测报告无我单位骑缝专用章无效。

3、本检测报告无检测、审核、批准人签字无效。

4、本检测报告涂改、换页、漏页无效。

5、对本检测报告的复印件未重新加盖检测专用章无效。

6、对检测报告若有异议，应于收到报告之日起十五日内向我单位书面提出，逾期不予受理。

7、本检测报告一式2 份，正文共页。

目录1、工程概况 (1)2、委托检测项目 (1)3、工程执行的主要技术标准 (1)4、投入设备 (2)5、检测方法 (2)6、检测结果 (3)水电站水轮机组及电力设备检测技术报告1、工程概况省检验检测技术股份有限公司受省质量技术监督局检验检测机构资质认定评审组委托（委托编号：），对水电站进行水力机械性能和电气设备的检测，接受委托后我公司于2018年8月1日组织有关技术人员进入现场检测，并依据国家有关规范标准做出报告。

我公司于2018年8月1日组织进场施工，共投入1个作业组，于2018年8月1日全部工作结束。

被检水电站为小型水利发电站，站内共有水轮机组2台，一台转轮型号为220的混流式水轮机，立轴、金属蜗壳，转轮直径为250cm，型号为HL220-LJ-250；一台转轮型号为616的混流式水轮机，卧轴、金属蜗壳，转轮直径为100cm，型号为HLA616-WJ-100，水轮机型号参数如下表所示：表1-1 水轮机组统计表水轮机类型水轮机型号流量（m³/s）扬程（m）转速（r/min）功率（kw）1#水轮机HL220-LJ-250 15 8 1200 18002#水轮机HLA616-WJ-100 30 15 600 20002、委托检测项目根据委托要求、国家相关规范标准及现场实际情况，对水轮机组上、下游自由水位进行测量；对两台水轮机导叶叶片空蚀及磨损程度进行检测，涉及的检测参数有空蚀最大深度、空蚀面积、空蚀剥落体积、磨损面积、磨损深度，并对材料表面粗糙度进行测量；对1#水轮机组进、出口压力进行检测；对2#水轮机组的效率进行测算，涉及的参数有：流量、水力比能和电功率。

A n a l y t i c a l T r a n s m i t t e r sM300 Transmittersfor Comprehensive Liquid AnalysisTHORNTONLeading Pure Water AnalyticsM300 Transmitters Conductivity / Resistivity pH / ORPDissolved Oxygen Dissolved Ozone Flow / Total FlowM 300 T r a n s m i t t e r s2The METTLER TOLEDO THORNTON M300 series of process analytical instruments provide single-channel, multi-channel and multi-parameter models to measure conductivity/ resis-tivity, pH/ORP, dissolved oxygen, ozone and flowrate. Both ¼DIN and ½DIN enclosures are available for especially convenient panel, wall and pipe mounting.The standard for measurementin pure water treatmentConductivity / Resistivity 1 2 analog; 4 relays 3Conductivity / Resistivity 2 4 analog; 4 relays 3pH ORP1 2 analog; 4 relays 4Conductivity / Resistivity, pH / ORP Dissolved Oxygen, Ozone 2 4 analog; 6 relays 5 - 6Flow 1 2 analog; 4 relays 4Flow44 analog; 4 relays4*physical and electrical specifications on page 7, order numbers on page 10M o d e l s e l e c t i o nFeaturesLarge backlit 4-line displayCompact ¼DIN panel-mounting with NEMA 4X, IP65 panel seal Robust ½DIN wall-mounting with NEMA 4X, IP65 back cover User-selectable dual-level password protection On-line sensor diagnostics for pHInternal PID control with relay or analog output USB port for configuration and data acquisition Direct sensor inputs for all parameters Compatible with existing Thornton sensors Plug-in terminal connectors for easy wiring Universal AC/DC power supplyMultiple languages: English, French, German, Italian, Spanish CE compliant, UL Listing pending for US and Canadian standards ApplicationsPure and ultrapure water treatment for semiconductor rinsing, critical power/steam makeup and pharmaceutical waters.Semiconductor processing in rinsers and wet benches with precise resistivity measurement and temperature compensation.Power plant cycle chemistry and stator cooling monitoring with exceptionally accurate temperature compensation for specific and cation conductivity and pH and very low maintenance dissolved oxygen measurement.Pharmaceutical water monitoring to meet USP, EP, and JP conductivity requirements including built in tables of alarm limits.Reclaim, recycle and wastewater treatment for the above industry applications for contaminant detection,diversion and neutralization.3One & Two channel modelsHighest accuracy measurement & temperature compensation Wide range of measurement allows verification in ASTM standards even for pure water measurementsTwo- & four-electrode conductivity/resistivity measurementsReverse osmosis % rejection computation on two-channel models Direct acid & caustic concentration readout USP ‹645› & EP alarm setpointsMeasurement SpecificationsM300 Conductivity / Resistivity ModelsConductivity/Resistivity Ranges0.01 Constant Sensor 0.002 to 200 μS/cm (5000 ohm-cm to 500 Mohm-cm)0.1 Constant Sensor 0.02 to 2000 μS/cm (500 ohm-cm to 50 Mohm-cm)10 Constant Sensor 50 to 40,000 μS/cm (25 to 20 Kohm-cm)4-electrode Sensor0.01 mS/cm to 650 mS/cm (1.54 ohm-cm to 100 Kohm-cm) readout in equivalent S/m ranges is selectable Concentration Ranges of HCl, NaOH, H 2SO 40-20%, 0-15%, 0-20%TDS Ranges (CaCO 3and NaCl)cover equivalent conductivity rangesCalculated Paraameters (2-channel)% Rejection, power plant calculations of pH based on specific and cation conductivity, and C02based on cation and degassed conductivity Resolution four significant digits, auto-ranged Update ratedisplay and outputs, once per second Temperature Measurement Range -40 to 200°C (-40 to 392 °F), resolution 0.1°Temperature Sensor Input RTD, Pt1000 (Pt100 with adapter)Temperature Compensation selectable as: Std (standard high purity Thornton/Light), Light 84, Std referenced to 75°C,linear %/°C, 50% glycol, 100% glycol, cation, ammonia, isopropyl alcohol, none Sensor maximum distance 61 m (200 feet); 15 m (50 ft) with 4-electrode sensorsConductivity/Resistivity Accuracy ± 0.5% of reading or 0.5 ohm, whichever is greater, up to 18 Mohm-cm Repeatability± 0.1% of reading Temperature Relative Accuracy ± 0.25 °C (± 0.45 °F) Temperature Resolution 0.01 °Temperature Repeatability ± 0.13 °C (± 0.23 °F)Setpoints/Alarms 2 - high, low, outside, between, USP, EP 6 - high, low, outside, between, USP or EP Relays2 SPDT, 2 SPST reed 2 SPDT, 1 SPST NO, 1 SPST NC, 2 SPST reed Analog Output Signals 24Discrete Inputs12M 300 T r a n s m i t t e r s4M300 pH/ORP ModelspH, ORP Ranges -1.00 to 15.00 pH, -1500 to 1500 mV Temperature Range - 30 to + 130°C (-22 to 266 °F)Temperature Sensor RTD, Pt1000 (Pt100 with adapter)Temperature Compensation automatic / manual for electrode output, plus adjustable solution temperature coefficient for solution ionization effects Update rate display and outputs, once per second Calibration 1- or 2- point, with auto buffer recognitionDiagnosticsselectable continuous checking of membrane resistance and reference diaphragm/junction resistance (with solution ground sensors)Sensor Maximum Distance10 m (33 ft)pH, ORP Relative Accuracy ± 0.03 pH, ± 2 mV pH, ORP Resolution 0.01 pH, 1 mV Temperature Accuracy ± 0.25 °C (± 0.45 °F) Temperature Resolution0.1 °CSetpoints/Alarms 4 - high, low, outside, or between Relays2 SPDT, 2 SPST reed Analog Output Signals 2Discrete Inputs1Direct electrode inputOn-line sensor diagnostics for measuring and reference electrodeAuto buffer recognition with extensive buffer library Internal PID controlCombined high/low setpoint for alarming outside a band Solution temperature compensation for pure water ionization effects as well as conventional electrode temperature compensation Automatic sensor cleaningMeasurement Specifications5M300 Multiparameter Models0.01 Constant Sensor 0.002 to 200 μS/cm (5000 ohm-cm to 500 Mohm-cm)0.1 Constant Sensor 0.02 to 2000 μS/cm (500 ohm-cm to 50 Mohm-cm)10 Constant Sensor 50 to 40,000 μS/cm (25 to 20 Kohm-cm)4-electrode Sensor 0.01 mS/cm to 650 mS/cm (1.54 ohm-cm to 100 Kohm-cm)readout in equivalent S/m ranges is selectable Concentration Ranges of HCl, NaOH, H 2SO 40-20%, 0-15%, 0-20%TDS Ranges (CaCO 3and NaCl)cover equivalent conductivity ranges RO % Rejection0 -100% (computed from two conductivity measurements)Conductivity Resolution four significant digits, auto-rangedpH, ORP Ranges-1.00 to 15.00 pH, -1500 to 1500 mV; resolution 0.01 pH, 1 mVDissolved Oxygen Ranges 0-20,000 ppb or μg/L; 0-20 ppm or mg/L, 0-200% saturation; resolution 0.1 ppb or μg/L Dissolved Ozone Ranges0-5,000 ppb or μg/L, 0-5 ppm or mg/L; resolution 0.1 ppb or μg/L Temperature Measurement Range -40 to 200 °C (-40 to 392 °F); resolution 0.1 °Temperature Sensor Input RTD, Pt1000 (Pt100 with adapter)Update ratedisplay and outputs, once per secondTemperature CompensationConductivity/Resistivityselectable as: Std (standard high purity Thornton/Light), Light 84, Std referenced to 75°C, linear %/°C, 50% glycol, 100% glycol, cation, ammonia, isopropyl alcohol, nonepHautomatic / manual for electrode output, plus adjustable solution temperature coefficient for solution ionization effectsDissolved Oxygen automatic, for membrane permeability and oxygen solubility Dissolved Ozoneautomatic, for membrane permeability and ozone solubility Conductivity/Resistivity Calibration 1-point; 2-point for 4-E sensorspH Calibration 1- or 2-point, with auto buffer recognitionpH Diagnosticsselectable continuous checking of membrane resistance and reference diaphragm/junction resistance (with solution ground sensors)Dissolved Oxygen Calibration air/comparison, zero Dissolved Ozone Calibration comparison, zeroSensor maximum distance61 m (200 ft); 15 m (50 ft) with 4-electrode sensorsConductivity/Resistivity± 0.5% of reading or 0.5 ohm, whichever is greater, up to 18 Mohm-cm pH, ORP ± 0.03 pH, ± 2 mV Dissolved Oxygen ± 1% (± 2% with long life probe) of reading or ± 1 ppb, system accuracy Dissolved Ozone± 2 % of reading or ± 3 ppb, system accuracyRelays2 SPDT, 1 SPST NO, 1 SPST NC, 2 SPST reed Analog Output Signals 4Discrete Inputs2Two Field-configurable channels for any pair of parameters:Conductivity/resistivity, pH/ORP, dissolved oxygen and/or dissolved ozone Reduces number of instruments and amount of panel space Includes all features of single parameter instrumentsMeasurement SpecificationsM 300 T r a n s m i t t e r s6Available in one and four channel models Accept input from most pulse flow sensors Compute total flow with high resolution Configurable for batch controlCompute reverse osmosis % recovery on four channel modelMeasurement SpecificationsM300 Flow ModelsFlowrate Range 0 to 9999 GPM, L/min, m /hrTotal Flow Range 0 to 9,999,999 Gallons, 37,850,000 Liters, 37,850 m 3RO % Recovery Range 0 to 100%Flow Velocity Range equivalent ft/s, m/s Frequency Range1 to 4000 HzCalculated Parameters (4-channel)ratio, sum and difference of two flowratesResolution 4 significant digits, auto-ranged; up to 8 digits for total flow Update rate display and outputs, once per 2 seconds Input pulseslow <1.0 volt; high >1.4 volts (36 volts max)Accuracy ± 0.5 Hz Repeatability± 0.2 Hz Setpoints/Alarms 4 - high, low, outside, or between 8 - high, low, outside, or between Relays2 SPDT, 1 SPST NO, 1 SPST NC 2 SPDT, 1 SPST NO, 1 SPST NC Analog Output Signals24Discrete Inputs, for external totalizer reset127Operator interface4 line back-lit LCD; 5-tactile keys1/4 DIN Model Dimensions (H x W x D)4.01 x 4.01 x5.51 in (102 x 102 x 140 mm)Max. Depth,- panel mounted4.96 in (126 mm), excluding plug-in connectors 1/2 DIN Model Dimensions (H x W x D)5.90 x 5.90 x 4.57 in (150 x 150 x 116 mm) Max. Depth,- panel mounted3.46 in (88 mm)MaterialABS/polycarbonate Weight, 1/4 DIN Models 1.5 lb (0.7 kg)Weight, 1/2 DIN Models 2 lb (1 kg)UL Electrical Environment Installation (overvoltage) Category IIRatings/Approvals UL (pending, US & Canada), CE compliant; NEMA 4X, IP 65 - 1/2 DIN wall mount and 1/4 DIN panel seal EMC Emissions according to EN55011 Class APoweruniversal 100-240 VAC, 50-60 Hz or 20-30 VDC; 5 W(on power loss, all settings are retained in non-volatile memory without batteries)Storage temperature-40 to 70 °C (-40 to 158 °F)Ambient temperature operating range -10 to 50 °C (14 to 122 °F)Relative humidity0 to 95%Analog outputs (as specified for individual models)powered 0/4-20 mA, 22 mA alarm, 500 ohms maximum load; not for use with externally powered circuits Analog output accuracy ± 0.05 mAAnalog output scalinglinear, bi-linear, logarithmic (1,2,3 or 4 decades), auto-ranging Relays (as specified for individual models)all contacts are potential free, with adjustable hysteresis and time delay SPDT, SPST NO, SPST NC 250 VAC/30 VDC, 3 A, resistive SPST reed300 VDC, 0.5 A, 10 WDigital communicationsUSB, type B connector, for remote configuration and data acquisitionDiscrete input (as specified for individual models)accepts dry contact closure for remote flow totalizer reset or remote PID controlauto/manual selectionDisplay auto/manual status and % output on bottom line of displaySettings auto/manual, setpoint, deadband, non-linear corner points, control limits, proportional gain, integral reset time (min.), derivative rate time (min.)Manual Station controlled by up/down arrow keys in manual mode; remote auto/manual selection by discrete input Control Output Typesone or two analog signals, relays—pulse frequency, or relays—pulse length Physical & Electrical Specifications - all modelsM 300 T r a n s m i t t e r sDimensional informationDimensions for 1/4 DIN panel-mount modelsDimensions for 1/2 DIN wall/panel-mount modelsDimensions for 1/2 DIN pipe mount kit9M 300 T r a n s m i t t e r s101/4 DIN enclosure – panel mounting kit included M3001-channel Conductivity/Resistivity 58 002 301M3002-channel Conductivity/Resistivity 58 001 304M3001-channel pH/ORP 58 001 303M3002-channel Multiparameter 58 001 306M3001-channel Flow 58 004 302M3004-channel Flow58 001 3051/2 DIN enclosure – panel/wall/pipe mount*M3001-channel Conductivity/Resistivity 58 002 311M3002-channel Conductivity/Resistivity 58 001 314M3001-channel pH/ORP 58 001 313M3002-channel Multiparameter 58 001 316M3001-channel Flow 58 004 312M3004-channel Flow58 001 315* Panel and pipe mounting require kits, listed below, ordered separately.Panel Mount Kit for 1/2 DIN models 52 500 213Pipe Mount Kit for 1/2 DIN models 52 500 212Conductivity Calibration Module58 082 300Adapter, VP to Standard, for calibrating conductivity with VP Patch Cord 58 080 102Configuration Software & Data Logger Kit 58 077 300Adapter Panel - M300 to 200/2000 cutout58 083 305StandardVP*1 ft (0.3 m) 1001-67-5 ft (1.5 m) 1005-6758 080 20110 ft (3 m) 1010-6758 080 20215 ft (4.5 m) 1015-6758 080 20325 ft (7.6 m) 1025-6758 080 20450 ft (15.2 m) 1050-6758 080 20575 ft (23 m) -58 080 206100 ft (30.5 m) 1110-6758 080 207200 ft (61 m)1120-6758 080 208* For VP Conductivity sensors only.Ordering InformationpH / ORP / Dissolved Oxygen / Ozone Sensor CablespH, Dissolved Oxygen**, Ozone3 ft (1 m) VP, -30 to 70 °C52 300 107 10 ft (3 m) VP, -30 to 70 °C52 300 108 16 ft (5 m) VP, -30 to 70 °C52 300 109 33 ft (10 m) VP, -30 to 70 °C52 300 110 High temp 3 ft (1 m) VP, -40 to 135 °C52 300 111 High temp 10 ft (3 m) VP, -40 to 135 °C52 300 112 High temp 16 ft (5 m) VP, -40 to 135 °C52 300 113 High temp 33 ft (10 m) VP, -40 to 135 °C52 300 114ORP3 ft (1 m) AS910 001 0102 10 ft (3 m) AS910 001 0302 16 ft (5 m) AS910 001 0502 33 ft (10 m) AS910 001 1002 ** For long life dissolved oxygen sensor 58 037 220 only, use standard conductivity cables in previous table.Calibration / Verification SolutionsConductivity Standard SolutionsConductivity standard, 25 μS/cm, 500 mL, HCl, ± 3%58 078 001 Conductivity standard, 100 μS/cm, 500 mL, KCl, ± 1%58 078 002 Conductivity standard, 1000 μS/cm, 500 mL, KCl, ± 1%58 078 003 Conductivity standard, 10,000 μS/cm, 500 mL, KCl, ± 1%58 078 004 Conductivity standard, 100,000 μS/cm, 500 mL, KCl, ± 1%58 078 005pH and ORP (Redox) Standard Buffer SolutionspH Buffer, 4.01, 250 mL51 340 057 pH Buffer, 7.00, 250 mL51 340 059 pH Buffer, 9.21, 250 mL51 300 193 pH Buffer, 10.00, 250 mL51 340 056 ORP Buffer, 468 mV, 6 x 30 mL51 319 058 ORP Buffer, 220 mV, 6 x 250 mL51 340 08111Mettler-Toledo Thornton, Inc.36 Middlesex Turnpike Bedford, MA 01730 USA Tel. +1-781-301-8600Fax +1-781-301-8701Toll Free +1-800-510-PURE ******************** Subject to technical changes © Mettler-Toledo Thornton, Inc. ML0122 Rev.B 02/07Visit for more information/thorntonQuality certificate.Development, production andtesting to ISO 9001.A certified ServiceXXL provider.M300 Conductivity Calibration Module 58 082 300•Includes resistances for all ranges of conductivity/resistivity and temperature •Used with 1- and 2- channel conductivity and multiparameter models •With NIST-traceable certificate of calibration•Enables efficient QA program•Includes standard patch cord connection; 58 080 102adapter available for use with VP patch cords。

LS300-A型便携式流速测算仪使用说明书潍坊金水华禹信息科技有限公司3．4关机操作：每次使用完仪器，只要拨下插头，仪器即可自动关机，并保存关机前所选定流速仪型号和参数，在下一次使用时，只需插上插头，接好流速仪，按一次换屏键即可进行测流工作。

四.计算机联机运行(定货无要求时无此功能)首先用专用通讯电缆连接测算仪与计算机的通讯口，打开计算机进入WINDOWS平台中－程序－附件－通讯－超级终端，设置波特率为2400，通讯位为8位，停止位1位，奇偶校验为无，流控制为软件方式，选择正确的通讯口，接通测算仪的信号电源线，启动测流。

待每次测流历时结束后，测算仪自动送出一组数据到计算机屏幕显示。

K=7800 C=0.050 T=0106.5 N=0015 V=0.160K=7800 C=0.050 T=0108.4 N=0016 V=0.165五．仪器的维护：测算仪的维护，短期不用时，必须拨掉插头（断开电源）保存。

长期不用时，三个月须充电一次。

每次使用后，用清水冲洗流速仪、测杆，并用毛巾擦干，存放。

六．仪器的全套设备：LS300-A速测算仪一个LS300-A仪旋桨一架信号联线一付*通讯电缆（选配）一付充电器一只附件：LS300-A型便携式流速测算仪使用说明书一本特别提醒:仪器首次次充电应大于3小时. 测试时间请设置20秒以上每次请将电池电用完后再充.（本机有过放过充保护）LS300-A型便携式流速测算仪LS300-A型便携式流速流量仪（简称便携式流速仪）是专门为水文站、厂矿、环保监测站、农田排灌、水文地质调查等部门在野外进行明渠流速流量测量而研制的。

LS300-A型智能流量流速仪可配套新型流速旋浆传感器, 该传感器是采用先进的技术于2004年底最新研制成功，旋浆螺旋角、螺距、制作工艺和材料等都进行了重新设计，旋浆直径分别为Φ15mm和Φ12mm(旋浆反光面采用先进的电镀工艺，耐磨损，信号强)，起动流速≤1cm／s，起动流速、测速范围、线性度、同心度、率定系数和均方差等指标均较以往传感器有很大的改进和提高。

LS25-1和LS25-3A型旋桨式流速仪产品介绍LS25-1型旋桨式流速仪产品介绍测速范围：～s工作水深：﹥信号数：5转1信号用途：适于飘浮物少，流速不大的河流测量流速全套仪器：流速仪主机需配测算仪、钢丝绳和信号线等使用。

一、用途LS25－1型旋桨式流速仪是一种江河水文测验仪器，主要用于测定一般河流、渠道、水库、湖泊等过水断面中预定测点的水流平均速度，从而确定该断面的流量。

二、主要技术指标1．测速范围：Ｖ=~s2．工作水深：一般不大于24m；3．工作水温：0~40℃；4．工作水质：淡水(含有不过分的矿物质）或含有泥沙的浑水；5．连续工作的累计时间：8h；6．仪器的起转速度：V0≤s7．检定公式的均方差：m≤％8．桨叶螺距：250mm；9．每二次信号间桨叶的转数：20转三、工作原理及计算方法LS25－1型旋桨式流速仪的工作原理是：当水流作用到仪器的感应元件——桨叶时，桨叶即产生旋转运动，水流越快，桨叶转动越快，转速与流速之间存在着一定的函数关系，即V=f(n)。

所以说，确定水的流速，实际上只要准确的测出仪器桨叶的转数及相应的时间就行了。

假定仪器的临界速度为Vk，实验表明，在Vk以下至起转速V0之间，函数是曲线形式，Vk以上则是线性关系。

每架仪器检定结果，均附有曲线图和如下的检定公式：V=bn+a式中：V——流速(m/s)；n——桨叶回转率(转速)，等于桨叶总转数“N”与相应的测速历时“T”之比，即n=N/T；b——水力螺距(对应于原标准的K)，单位是m；a——仪器常数(对应于原标准的C)，单是m/s；b值和a值与桨叶的螺距和支承系统的摩擦阻力等因素有关，因此对该部分的零件务必小心地使用和仔细的养护，否则将会影响到流速测验的准确度。

水流速度的测定，实际上乃是测量在预定时间内流速仪的桨叶被水流冲动时所产生的转数。

桨叶的转数是利用仪器的接触机构转换为电脉冲信号，经由导线传递到水面部分的计数仪器来计算的。