LS300-A型便携流速测算仪说明书

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。

USER GUIDE Vane Thermo-Anemometer / DataloggerModel SDL300IntroductionCongratulations on your purchase of the Extech SDL300 Thermo-Anemometer Datalogger. This meter displays and stores air velocity and temperature readings. Temperature readings from the thermometer built into the vane probe or from an externally connected type K or J thermocouple temperature probe can be displayed and recorded. Data is stored on an SD card for transfer to a PC. In addition, an RS232 port allows data streaming to a PC. This instrument is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit the Extech Instruments website () to check for the latest version of this User Guide. Extech Instruments is an ISO-9001 certified company.SafetyInternational Safety SymbolsThis symbol, adjacent to another symbol or terminal, indicates the user must refer to themanual for further information.Meter Descriptioninput1. Thermocouple2. Vane input plug3. Air velocity reading4. Units of measureBacklight key5. HOLD/key6. MAX-MIN7.8. PC interface jackkey9. Reset10. Power Adaptor jack11. SD card slot12. ENTER and LOG key13. Down ▼arrow and FUNCTION key14. Up ▲ arrow and UNITS key15. Power ON-OFF key16. Temperature reading with units of measure17. Anemometer vane18. Vane icon faces the air flow19. Vane handle20. Vane connecting cableNotes:Battery compartment, tilt stand, and tripod mount are located on the rear of the instrument.Items 8, 9, and 10 are located behind the snap-off compartment cover on right side of meter.OperationPower ON-OFF∙Power the meter by pressing and holding the power key for at least 1.5 seconds.∙Press and hold the power key for at least 1.5 seconds to power OFF the meter.Meter FunctionsThis meter has two modes of operation. Press and hold the FUNCTION key for at least 1.5 seconds to switch from one mode to the other.∙Air Velocity plus Temperature mode (meter briefly displays “An” icon)∙Type K or J thermocouple temperature mode (meter briefly displays” tP” icon)Air Velocity plus Temperature Mode1. Select the Air Velocity and Temperature mode.2. Connect the vane probe to the meter’s probe jack (top right of meter) via the probe plug.3. Hold the probe by its handle and allow the air flow to enter the vane. Note that the air flow mustface the vane icon.4. The meter will display the air velocity measurement (upper display area) and the airtemperature (lower display area)Changing the Air Velocity Unit of MeasureThis meter offers five (5) units of measure selections for air velocity: m/s (meters per second), FPM (feet per minute), Km/h (kilometers per hour), knots, and mph (miles per hour).1. Press and hold the UNIT key for at least 1.5 seconds to switch from one unit of measure toanother.2. Note that pressing and holding the UNIT key continuously allows for quicker scrolling. Releasethe key when the desired unit of measure is displayed.Thermcouple (Type J or K) Temperature Mode1. Select the Thermocouple Temperature mode using the FUNCTION button.2. The meter will display a ‘J’ or a ‘K’; on the left side of the display indicating the current setting.To change the thermocouple type, refer to the Setup Mode section.3. Connect a Type J or Type K thermocouple to the meter’s sub-miniature thermocouple jack (topof meter on the left).4. Hold the thermocouple in the air in the area to be tested.5. The meter will display the thermocouple temperature in the main display area.6. To change the temperature unit of measure (°C and °F) refer to the Setup Mode section.Data HoldTo freeze a measurement on the display, press the HOLD key momentarily. The meter will emit a beep, the reading will hold, and the HOLD display icon will switch on. Press the HOLD key again to release the display and exit the Data Hold mode returning the meter to the normal operating mode.MAX-MIN ReadingsFor a given measurement session, this meter can record the highest (MAX) and the lowest (MIN) readings for later recall.1. Press the MAX-MIN key momentarily to access this mode of operation (REC icon appears)2. The meter is now recording the MAX and MIN readings.3. Press the MAX-MIN key again to view the current MAX reading (MAX icon appears). Thereading on the display is now the highest reading encountered since the REC icon wasswitched on (when the MAX-MIN key was first pressed).4. Press the MAX-MIN key again to view the current MIN reading (MIN icon appears). Thereading on the display is now the lowest reading encountered since the REC icon wasswitched on (when the MAX-MIN key was first pressed).5. To exit the MAX-MIN mode, press and hold the MAX-MIN key for at least 1.5 seconds. Themeter will beep, the REC-MAX-MIN icons will switch off, the memory will clear, and the meter will return to the normal operating mode.Display BacklightTo turn the display backlight ON or OFF, press and hold the backlight key for at least 1.5seconds. The meter will beep when switching the backlight ON or OFF unless the beeper isdisabled as described in the Setup Mode section of this user guide.System ResetIf the meter’s keys become inoperable or if the display freezes, the Reset button can be used to reset the instrument.1. Use a paper clip or similar item to momentarily press the reset button located on the lower rightside of the instrument under the snap-off compartment cover.2. After pressing the Reset button, switch the instrument ON by pressing and holding thePOWER key for at least 1.5 seconds. If using the power adaptor, unplug the adaptor and then plug it back in again to power the meter.AC Power AdaptorThis meter is normally powered by six (6) 1.5V ‘AA’ batteries. However, an optional AC 9V power adaptor is available. To use the adaptor, insert the power adaptor plug into the jack on the bottom right side of the meter (under the snap-off compartment cover); plug the other end of the adaptor into an AC power source. The meter will now be permanently powered (as long as the adaptor is used) and the power key will be disabled.DataloggerTypes of Data Recording∙Manual Datalogging: Manually log up to 99 readings onto an SD card via push-key press.∙Automatic Datalogging: Automatically log data onto an SD memory card where the number of data points is limited only by the card size. Readings are logged at a rate specified by the user. SD Card Information∙Insert an SD card (from 1G size up to 16G) into the SD card slot at the bottom of the meter.With regard to orientation, the card should be inserted with the front of the card (label side)facing toward the rear of the meter.∙If the SD card is being used for the first time it is recommended that the card be formatted and the logger’s clock set to allow for accurate date/time stamping during datalogging sessions.Refer to the Setup Mode section for SD card formatting and time/date setting instructions.∙European and USA numerical formats differ. The data on the SD card can be formatted for either format. The meter defaults to USA mode where a decimal point is used to separate units from tenths, i.e. 20.00. The European format uses a comma, i.e. 20,00. To change this setting, refer to the Setup Mode section.Manual DataloggingIn the manual mode the user presses the LOG key to manually log a reading onto the SD card.1. Set the sampling rate to ‘0’ seconds.2. Press and hold the LOG key for at least 1.5 seconds; the lower portion of the display will showp-n (n = memory position number 1-99).3. Press the LOG key momentarily to log a reading into memory. The REC icon will flash eachtime a data point is stored (the SCAN SD icon will appear when the meter accesses the card).▲ and ▼ keys to select one of the 99 data memory positions in which to record.the4. Use5. To exit the manual datalogging mode, press and hold the LOG key for at least 1.5 seconds. Automatic DataloggingIn automatic datalogging mode the meter takes and stores a reading at a user-specified sampling rate onto SD card. The meter defaults to a sampling rate of one second. To change the sampling rate, refer to the Setup Mode section (the sampling rate cannot be ‘0’ for automatic datalogging):1. To begin an automatic Datalog session press and hold the LOG key for at least 1.5 seconds.2. The meter will scan for an SD card and verify that it can be used to store data. If a card is notinserted or if the card is defective, the meter will display SCAN SD indefinitely. In this case,switch the meter OFF and try again with a valid SD card.3. If the SD card is valid, the display will show the LOG icon (or the LOG icon alternating with thetemperature display) and then the REC icon will flash each time that a reading is stored.4. To pause the datalogger, press the LOG key momentarily. The REC icon will stop flashing. Toresume logging simply press the LOG key again momentarily.5. To terminate the datalogging session press and hold the LOG key for at least 1.5 seconds.6. When an SD card is used for the first time a folder is created on the card and named AMC01.Up to 99 spreadsheet documents (each with 30,000 readings) can be stored in this folder.7. When datalogging begins a new spreadsheet document named AMC01001.xls is created onthe SD card in the AMC01 folder. The data recorded will be placed in the AMC01001.xlsdocument until 30,000 readings are reached.8. If the measurement session exceeds 30,000 readings, a new document will be created(AMC01002.xls) where another 30,000 readings can be stored. This method continues for up to 99 documents, after which another folder is created (AMC02) where another 99 spreadsheet documents can be stored. This process continues in this same fashion with folders AMC03through AMC10 (last allowable folder).SD Data Card to PC Data Transfer1. Complete a datalogging session as covered above. For the first test, simply record a smallamount of test data.2. With the meter switched OFF, remove the SD Card.3. Plug the SD Card directly into a PC SD card reader. If the PC does not have an SD card slot,use an SD card adaptor (available at most outlets where computer accessories are sold).4. Power the PC and run a spreadsheet software program. Open the saved documents in thespreadsheet software program (see examples of spreadsheet displays below).Spreadsheet data exampleSpreadsheet example (Plotting the data)RS-232/USB PC InterfaceFor streaming of data to a PC via the RS232 Output jack, the optional 407001-USB kit (RS232 to USB cable and driver CD) along with the 407001 software (available free at/sdl300) are required.Setup ModeBasic settings at a glanceTo view the current configuration of the meter with regard to time, date, thermocouple type, and datalogging sampling rate, press the SET/CLOCK ICON key momentarily. The meter will now display the configuration in quick succession. Repeat as necessary to observe all of the information. Accessing the Setup mode1. Press and hold the SET key for at least 1.5 seconds to access the Setup menu.2. Press the SET key momentarily to step through the available parameters. The parameter typeis shown on the bottom of the LCD and the current selection for that type is shown above it.3. When a parameter is displayed that is to be changed, use the arrow keys to change thesetting. Press the ENTER key to confirm a change.4. Press and hold the SET key for at least 1.5 seconds to exit the Setup mode. Note that themeter automatically switches out of the Setup mode if no key is pressed in 7 seconds while in the Setup mode.5. The available Setup parameters are listed below. Additional detailed information is providedbelow this list:dAtE Set the clock time (Year/Month/Date; Hour/Minute/Second)SP-t Set the datalogger sampling rate (1 to 3600 seconds)PoFF Automatic power-off managementbEEP Set beeper sound ON/OFFdEC Set SD card Decimal character (comma for European format)Sd F SD memory card Formatt-CF Select the Temperature unit of measure to C or FtYPE Select the thermocouple type to K or JSetting the Clock TimedAtE parameter.1. Accessthe2. Use the arrow keys to change a value3. Use the ENTER button to step through the selections4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode).5. The clock will keep accurate time even when the meter is switched off. However, if the batteryexpires the clock will have to be reset after fresh batteries are installed.Setting the Datalogger Sampling Time (Rate)SP-t parameter.1. Accessthe2. Use the arrow keys to select the desired sampling rate. The available settings are: 0, 1, 2, 5, 10,30, 60, 120, 300, 600, 1800, and 3600 seconds.3. Press the ENTER key to confirm the entry.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode). Enabling/Disabling the Auto Power OFF FeaturePoFF parameter .the1. Access2. Use the arrow keys to select ON (enable) or OFF (disable). With the Auto Power OFF featureenabled, the meter will automatically switch OFF after 5 minutes of inactivity.3. Press ENTER to confirm setting.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode).Set the Beeper Sound ON or OFFbEEP parameter.1. Accessthe2. Use the arrow keys to select ON (enable) or OFF (disable).3. Press ENTER to confirm setting.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode). Numerical Setting (comma or decimal)European and USA numerical formats differ. The meter defaults to USA mode where a decimal point is used to separate units from tenths, i.e. 20.00; European formats use a comma, i.e. 20,00 to separate units from tenths. To change this setting:dEC parameter as described in the Accessing Setup Mode section above.1. Accessthe2. Use the arrow keys to select USA or EUro.3. Press ENTER to confirm setting.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode). SD Card FORMATTINGtheSd-F parameter.1. Access2. Use the arrow keys to select YES to format the card (select NO to abort). Note that all data onthe card will be lost if formatting is attempted.3. Press ENTER to confirm selection.4. Press ENTER again to re-confirm.5. The meter will automatically return to the normal operating mode when formatting is complete.If not, press and hold the SET key for at least 1.5 seconds to exit to the normal operationmode.Set the Temperature Units of Measure (°C or °F)thet-CF parameter.1. Access2. Use the arrow keys to select °C or °F.3. Press ENTER to confirm setting.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode). Set the Temperature Thermocouple Type (J or K)tYPE parameter.1. Accessthe2. Use the arrow keys to select J or K.3. Press ENTER to confirm setting.4. Press and hold the SET key for at least 1.5 seconds to exit to the normal operation mode (orsimply wait 7 seconds for the meter to automatically switch to the normal operating mode).Battery Replacement and DisposalWhen the low battery icon appears on the LCD, the batteries must be replaced. Several hours of accurate readings are still possible in this condition; however batteries should be replaced as soon as possible:1. Remove the two (2) Phillips screws from the rear of the meter (directly above the top of the tiltstand).2. Remove and safely place the battery compartment and screws where they will not be damagedor lost.3. Replace the six (6) 1.5V ‘AA’ batteries observing polarity.4. Replace the battery compartment cover with the two (2) Phillips screws.All EU users are legally bound by the Battery Ordinance to return all used batteries tocommunity collection points or wherever batteries / accumulators are sold!Disposal in household trash or refuse is prohibited!Disposal: Follow the valid legal stipulations in respect of the disposal of the device at theend of its lifecycleOther Battery Safety Reminders∙Never dispose of batteries in a fire. Batteries may explode or leak.∙Never mix battery types. Always install new batteries of the same type.SpecificationsGeneral SpecificationsDisplay Backlit LCD; LCD size: 52 x 38mm (2 x 1.5”)Measurement Units Air velocity: m/S (meters per second) Km/h (kilometers per hour)Ft/min (FPM; feet per minute), Knots (nautical miles per hour), Mile/h(mph; miles per hour)Air temperature: °C / °FType K / Type J thermocouple: °C / °FDatalogger Sampling Rate AUTO: 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800, 3600seconds. Note that a one (1) second sampling rate cancause some data loss on slower computers.MANUALLY: Set the sampling rate to ‘0’Memory Card SD memory card; 1G to 16GB sizeTemperature Compensation Automatic temperature compensation for the Anemometerfunction and the type K/J thermometer function Data Hold Freeze the display readingMemory Recall Record and Recall the Maximum and Minimum readingsDisplay update rate Approx. 1 secondData Output RS-232 / USB PC computer interfaceOperating Temperature 0 to 50°C (32 to 122°F)Operating Humidity 85% R.H. max.Auto Power OFF A fter 10 minutes of inactivity (can be disabled)Power Supply Six (6) 1.5VDC batteries (optional 9V AC adaptor)Power Consumption Normal operation (backlight & datalogger OFF): Approx. 15 mA dcWith backlight OFF and datalogging ON: Approx. 36 mA dc Weight 347g (0.76 lbs.); meter onlyDimension Main instrument: 182 x 73 x 47.5mm (7.1 x 2.9 x 1.9”)Anemometer sensor head: 72mm (2.8”) diameterElectrical Specifications (Ambient Temperature 23°C ± 5°C)Air velocityMeasurement Range Resolution Accuracym/S 0.4 - 35.0 m/s 0.1 m/S ± (2% rdg + 0.2 m/S)Km/h 1.4 - 126.0 km/h 0.1 Km/h ± (2% rdg + 0.8 Km/h)mph (Mile/h) 0.9 – 78.3 mile/h 0.1 mph ± (2% rdg + 0.4 mph)Knots 0.8 – 68.0 knots 0.1 Knots ± (2% rdg + 0.4 Knots)FPM (Ft/min) 79 - 6890 ft/min 1 FPM ± (2% rdg + 40 FPM)Note: 5 minute test limit on air speed >30.0m/s, 108km/h, 67mph, 58 knots, 5910ft/minAir temperatureMeasuring Range 0 to 70°C (32 to 158°F)Resolution 0.1°C (0.1 °F)Accuracy ± 0.8°C (1.5°F)Type K/J Thermocouple Thermometer TemperatureSensor Type Resolution Range Accuracy0.1°C -50.0 to 1300.0°C-100.0° to -50.1C± (0.4% rdg + 0.5°C)± (0.4% rdg + 1°C)Type K0.1°F -58.0 to 2372.0°F-148.0 to -58.1°F± (0.4% rdg + 1°F)± (0.4% rdg + 1.8°F)0.1°C -50.0 to 1200.0°C-100.0 to -50.1°C± (0.4% rdg + 0.5°C)± (0.4% rdg + 1°C)Type J0.1°F -58.0 to 2192.0°F-148.0 to -58.1°F± (0.4% rdg + 1°F)± (0.4% rdg + 1.8°F)Note: Above specifications tested under an environmental RF Field Strength lower than 3 V/M and afrequency lower than 30 MHzCopyright © 2013 FLIR Systems, Inc.All rights reserved including the right of reproduction in whole or in part in any form11 SDL300-EU-EN V1.5 07/13。

Flow-ADC-600便携式多普勒流速流量仪使用说明书潍坊金水华禹信息科技有限公司概述简便、快捷、准确、可靠、稳定的渠道与河流测量装置一直是各国流量测量专家的追求，受科学技术自身条件的限制，始终没能解决好这一难题。

但近几年美国将声学多普勒多点剖面流速测量技术应用在这一领域后，情况得到了根本性改变。

我公司引进Flow系列声学多普勒流速测量仪设计的流量测量系统已被广泛应用到水利、环保、城市供排水的流量、流速测量中。

应用声学多普勒效应简介多普勒效应是为纪念奥地利物理学家克里斯琴.约翰.多普勒而命名的，在声学领域中，当声源与接收体（即探头和反射体）之间有相对运动时，回声的频率将有所变化，此种频率的变化称之为频移，即多普勒效应。

现代社会中有大量应用这一物理原理而设计生产的仪表，如最常见的彩色多普勒超声二维结构图像仪、彩色多普勒血流图像仪，交通警测量汽车速度的微波测速仪以及水利学上的微波水表面流速仪等。

Flow-ADC-600 声学多普勒流速仪是应用当今最先进信号处理技术研发的多点、多层面流速分析仪，其最大特点是可任意按需要安装在被测河流或渠道侧面、底部或顶部，按现场情况任意设置向上、向下发射或向左、向右发射角度，从而准确测量出从水底到水面不同深层，从左到右不同距离上，根据多个流速数据、计算出平均流速。

根据现场水位的测绘能简单的测算各种规则或者非规则流体的截面面积绘制简单库容图。

大大简化了水利传统测流方法，并在准确性、稳定性，实时性上有了质的飞跃。

任意一个河流或渠道，只要有一台Flow-ADC-600测量仪，就能准确测出水的流态分布、流速数据及流量。

一、特点（1）、单只流速传感器，安装方便适合市政污下水管渠道、不满管管道、各种渠道、不规则河道、天然溪、排污口等流量测量并可隐蔽安装，可以做到长期稳定可靠工作。

（2）、既可顺流速、也可水位、水深方便统计。

（3）、大屏幕触摸屏，不仅有中文，还有配合图形，方便操作及流态分析。

流速测量仪安全操作及保养规程流速测量仪是一个常用的检测设备。

它能够测量液体或气体的流速，对很多领域都有用处。

但是使用它的时候需要注意安全，以免出现工作中断或者安全事故。

下面介绍流速测量仪的安全操作规程和保养规程，以方便使用者合理使用和维护流速测量仪。

安全操作规程1.使用前准备在使用流速测量仪前，需要先熟悉其基本结构和原理。

并了解各个零部件的基本属性和适用范围。

在正式使用之前进行校准，以确保测量精度和数据真实可靠。

同时，在实际测量前需要检查测量仪和附件是否有损坏，如有损坏需及时修理或更换。

在实际安装和使用时，贴近使用者的设备操作必须经过专业人员的合理规划、设计、安装和调试，以确保设备的安全运行。

2.安全操作注意事项在使用流速测量仪的时候，需要注意以下几点：1.严格遵守操作规范，避免出现误操作。

在场地操作时，必须戴上适当的防护用具，依据具体的场地环境使用相应的防护措施。

2.尽量避免将流速测量仪暴露在过度高温或过度低温的环境中。

加热或冷却处理时，必须注意流速测量仪可以承受的温度范围。

3.测量流体时，必须将流速测量仪与外界密封。

避免根据气体的压力变化造成自我损坏和流体污染。

4.在将流速测量仪运输到另一工作场所前，必须先关闭开关和阀门，并对测量线路和设备进行清洗，排除污渍和杂质。

运输前需做好固定措施，避免造成意想不到的事故。

5.流速测量仪的每个测量部位都有其安全标志，要按照标志的规范使用，避免出现安全事故。

如实际使用中出现损坏，应及时联系相关技术人员进行检修和维修。

3.使用后维护在使用完流速测量仪后，及时进行维护保养工作，以保证检测仪器的正常工作。

美化整理操作便于使用总体环境。

保养注意以下几点：1.定期检查流速测量仪的各个零部件和液晶面板。

如果出现故障，需要及时进行维修或更换。

检查之前要确保设备处于关闭状态，安全操作必须首要考虑。

2.进行荧光笔式液晶面板的清洁工作。

使用干净、柔软的布来进行清洁，而且不能使用过多的力度，以免造成面板的损坏。

1.适用范围适用于指导MGG/KL-DCBⅡ型便携式电磁流速/流量仪的操作及维护。

1.1原理MGG/KL-DCBⅡ型便携式电磁流速/流量仪是基于法拉第电磁感应定律制作的。

当导电流体在沿流速传感器的交变磁场与电极中轴线垂直面运动时，导电流体切割磁力线产生感应电势，该电势被信号电极（在与导电流体平行线和磁力线相互垂直的流速传感器两侧壁上安装了两个对称的电极）所采集，此感应电势与流速大小成正比。

转换器通过该感应电势计算出流过流速传感器侧面的导电流体流速，此流速信号经流量显示仪放大，转换成与流速信号成正比的数字量信号，由此实现流速的测量。

流量显示仪将流速信号加上已经置入的水位数据及渠道基本结构参数通过显示仪内设置的水利数学模型进行运算，从而得到过水断面的水流量。

公式如下：Q（瞬时流量）=S（断面面积）*V（断面平均流速）置入（水利模型）1.2适用范围适用于指导MGG/KL-DCBⅡ型便携式电磁流速/流量仪的操作及维护。

使用人员在使用仪器前必须认真阅读本作业指导书并严格遵照执行。

1.3测量范围a）流速测量0.05m/s～10m/s（分辨率5mm/s），流量≤10000m³/s；渠底宽≤20m；渠深≤20m；边坡系数0～10；b）测量精度：±1.0%FS；1.4工作条件：介质电导：>20µs/cm介质温度：0℃～60℃环境温度：-10℃～50℃显示位数：水位5位，流速5位，流量5位注意：设备离开采样设备间前，需完整填写设备出入库记录；使用完毕后，及时清洁仪器，并完整填写设备使用记录；设备管理员负责仪器的周期检定和维修，并做好相关记录。

2.参考资料2.1 MGG/KL-DCBⅡ型便携式电磁流速/流量仪使用说明书。

3. 组装与简介3.1连接、组装测试仪将仪器电磁流速传感器、流量显示仪、侧流杆（或悬挂钢丝）等部件连接。

3.2参数设置3.2.1按键说明a）退出键：切换功能：轻按此键可使光标在设置项之间切换；退出功能：在参数设置状态下长按6s退出设置状态返回工作界面b）▲：巡加键：向前翻页或者修改参数时加1键。

便携式流速测算仪便携式流速流量仪（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LS1206B型旋桨式流速传感器(或其它型号的旋杯旋桨流速仪)、MT-B型流速流量仪、0.4m×4Ф16测杆组成。

全套仪器置于高级铝合金密码箱内。

使用时，按图1所示组装成一体，接通信号线，即可进行各明渠中流速的测量，并自动显示流速。

图1. 便携式流速仪安装图该仪器结构简易、轻巧方便、耗电省、功能齐全、自动化程度高、稳定可靠，符合国家明渠流量测量标准，是国内目前新型的便携式流速测量仪器。

一．仪器的技术要求：(K/b)N测速公式：V ＝—————＋ C/a(m/s)(自动计算) K/b 、C/a均为常数T仪器编号：＿＿＿＿＿、K或b＿＿＿＿＿、C或a＿＿＿＿＿＿测速范围：0.05-7.00 m/s (可到7.00m/s)测流误差：≤1.5%显示屏：2×16位液晶显示测量方式：测杆定位测量（亦可缆绳悬挂定位测量）温度范围：－20℃- 50℃电源：DC5V（四节5号镍氢充电电池）,充满后可连续工作40小时以上.二．测量原理：本仪器依据明渠测流的流速面积法原理设计，测出流速即可得流量 Q＝V·S（S为断面面积）1.流速测定：测流速时，由水力推动旋桨式转子流速仪旋转，内置信号装置产生转数信号，由下面公式计算流速：(K/b)NV＝—————- ＋ C/a（m/s）T式中：V：测流时段内平均流速（m/s）b/K：桨叶水力螺距a/C：流速仪常数T：测流历时（单位为S）N：T时段内信号数S：断面面积Q：流量本仪器使用时，K/b 、C/a均为常数，测流时，设置T测出N，还可设置S，即可自动算出流速，和流量。

2. 流量的计算：流量测定根据明渠流量测量的流速面积法，先测出流速再乘以断面面积即得流量，本仪器会自动计算流量。

三．仪器的操作使用：正常时，插上插头，仪器电源即可通电显示上次关机时所选用流速仪参数。

便携式流速流量仪标准
便携式流速流量仪的标准因型号和厂家而异，但一般都有以下技术指标：
1. 测量范围：流速测量0.0000m/s～10m/s，渠宽≤20m，渠深≤20m，边坡系数0～10。

2. 测量精度：±1.0%。

3. 供电方式：3.6V内置锂电池2节，连续工作时间为3年。

4. 显示方式：LCD大屏幕液晶显示器，全中文显示，可显示流速、瞬时流量、累积总量、水位等测量数据。

5. 输出信号：脉冲输出0.00001～1m³/P，可任意设置（无源光耦输出）；频率输出1～1000Hz，可任意设置。

6. 数据保存功能：可保存1000组数据，数据存贮时间间隔可任意设置以及数据查询。

7. 配套传感器：旋转回转直径、水力螺矩等根据型号而不同。

在选购和使用便携式流速流量计时，应注意选择符合技术指标的型号，并按照使用说明书正确操作，以保证测量结果的准确性和可靠性。

第43卷 第2期2024年 3月华中农业大学学报Journal of Huazhong Agricultural UniversityVol.43 No.2Mar. 2024，22~29进水结构对圆形循环水养殖池流场的影响李彬涛，谭鹤群，张义仁，夏成醒华中农业大学工学院/农业农村部水产养殖设施工程重点实验室，武汉 430070摘要 为精准设计工厂化圆形循环水养殖池的进水结构，基于计算流体动力学技术，采用Fluent 软件建立数值模型模拟进水管在不同进水角度θ、进径比d/r 、进水高度h 工况下养殖池内的流场分布特性，并以平均速度v avg 和均匀系数U 为评价指标，对进水结构进行优化分析，在物理试验证明该数值模型能较好地模拟养殖池内的流场特征的基础上，模拟了不同进水结构对流场分布的影响。

结果显示：在相同条件下，进水角度θ在40°时v avg 取得最大值，水层之间的U 差异较小；进径比d/r 在0.1时v avg 和U 取得较大值，水层之间的U 差异较小；进水高度h 在100~400 mm 时v avg 取得较大值，且在h =100 mm 时水层之间的U 差异最小。

研究表明，当进水角度θ=40°、进径比d/r =0.1、进水高度h =100 mm 时，养殖池内流场特性处于较优状态。

关键词 循环水养殖； 计算流体力学； 进水结构； 流场特性中图分类号 S964.3 文献标识码 A 文章编号 1000-2421（2024）02-0022-08循环水养殖是一种通过技术手段创造合理可控的养殖环境、提高鱼类质量的高效集约型养殖模式［1］。

随着循环水养殖技术的发展，循环水养殖将在中国占据更多的市场份额，是中国水产养殖的主要发展方向之一［2］。

但是循环水养殖密度高、饵料投放多，在养殖过程中易产生大量不被摄食的饵料以及鱼类粪便等颗粒物，堆积于池底中［3］。

这些颗粒物在适宜条件下分解成氨氮等有害物质影响养殖对象［4］。

有关便携式流速仪的使用方法便携式流速仪是一种测量液体或气体流速的仪器，通常被使用于实验室、工厂、水处理或矿业等行业中。

在本文中，我们将详细介绍便携式流速仪的使用方法以及其常见的应用场景。

1.准备工作在使用便携式流速仪之前，需要做好以下准备工作：•确保便携式流速仪处于干燥、无尘的环境中；•准备好电源，需要使用电池或充电器进行电源供应；•检查传感器是否处于良好的运行状态；•验证仪器是否已经校准，如未校准需要进行标定。

2.使用步骤步骤1.设置仪器将仪器放在需要测量的位置处，并按照说明书设置测量范围、流速单位和显示模式等参数。

一旦设置好，将仪器置于安静的位置，根据需要连接计算机或其他设备。

步骤2.测量液体或气体流速将便携式流速仪放置在要测量流速的液体或气体流中。

确保仪器连接顺畅，传感器仅用于测量流体的运动，无法作为管道铺设的根据。

步骤3.记录数据确认便携式流速仪已经测量完成后，将数据记录下来。

大多数流速仪会自动将数据存储在内存中，也可以通过连接电脑直接将数据下载到计算机中进行更详细的处理。

步骤4.报告分析对于测量的数据进行分析，并撰写报告和总结。

注意，基本测量单位是立方米每小时（m³/h），但有时候也可以用立方英尺每分钟（cfm）等其他单位表达。

3.应用场景便携式流速仪可以广泛应用于多个行业中。

以下是一些常见的应用场景：检测水质便携式流速仪可以用于测量水流速、流量和水质。

使用便携式流速仪，可以快速测量水量和水质。

例如，在污水处理过程中，便携式流速仪可以检测到有害物质排放情况，以保证地下水资源的安全。

工业生产便携式流速仪同样可以用于测量气体和液体在工业生产中的流量，帮助监测生产过程中的产品质量和产量，并确定是否需要调整生产工艺。

环境监测便携式流速仪也可以用于环境检测中。

例如，在室外空气污染或尾气排放监测中，流速仪可以帮助监测空气中的二氧化碳和其他污染物质的含量，以改善环境质量。

结论总之，便携式流速仪是闪光的工具，能够测量气体和液体中的流速，从而帮助企业或政府部门提高生产效率和保护环境。

流速测算仪使用说明书文章http目录1:技术要求2：测量原理3：仪器的操作使用4：数据的存储5：流量计算6：存储数据查询7：仪器的维护8：仪器的全套设备9:流速仪型号、xx输入表10：仪器软件操作说明注：本说明书中的参数只供参考，使用时应按照鉴定证书的参数为准便携式流速测算仪便携式流速测算仪是专门为水文站，水文地质调查，环保监测、灌区等部门而专门研制的新型仪器。

该仪器具有耗电省、功能齐全、自动化程度高、稳定可靠,适用性强等优点。

适用于接收各种转子流速传感器所产生的信号。

技术指标▲流速范围：0.05〜7m/s▲精度：<1.5%▲显不：汉字液晶显示，4行32位▲存储：可存储100个断面数据▲通讯：标准RS232接口▲无线：具有无线接口，可与缆道等配套使用▲工作温度：・10°C 〜50°C▲工作电源：7.2V\\4200mAh,可充电二：原理流速、流量计算：测流速时，由于水力推动转子流速仪旋转，流速仪内部信号装路产生转数信号，便携式流速测算仪接收信号，再根据下面公式计算流速：V 二K・N/T + C (m/s)。

式中V：测流时段内平均流速K:桨叶水力螺距C:流速仪校订常数T:测流时间(单位为S)N:时段内信号数本仪器使用时,K、C均为校订常数，测流时，只要测出T和N,即可算出流速Vo依据流量公式Q二V・S而设计，只要计算出断面截面积S并路入就可求得流量Q (m3/s)注该机流量适合管道和标准小渠道和标准出水口用。

三：仪器的操作使用：仪器开机显示如图1所示：请输入流速仪型号T12图1：型号设路本仪器共设3个操作按键，如图2所示：换屏路数移位图2：如上所示3.1参数设路操作：3.1.1用路数键和移位键将流速仪型号路入,黑色闪烁光标（z）在哪个位路闪烁可按下路数键修改该位路数据，按一下换位键将光标移到下一位路。

如1206B流速仪路入12即可，（具体型号看说明书最后一页）显示如下：请输入流速仪型号TOO图3：按〃路数〃键到显示2为止请输入流速仪型号T12图4:型号设路型号路好后按换屏键进入仪器参数设路显示图面同时保存以上设路（如下图）。