Dwyer压差变送器
dwyer2000差压表中文说明书
dwyer2000差压表中文说明书摘要：1.Dwyer 2000 差压表概述2.Dwyer 2000 差压表的主要特点3.Dwyer 2000 差压表的工作原理4.Dwyer 2000 差压表的应用领域5.Dwyer 2000 差压表的操作与维护6.Dwyer 2000 差压表的注意事项正文：【Dwyer 2000 差压表概述】Dwyer 2000 差压表是一款高精度的差压测量仪器，适用于各种工业场合，如石油、化工、冶金、电力等。
它能够测量流体中的压力差，为流程控制、生产监测和设备维护提供准确数据。
【Dwyer 2000 差压表的主要特点】Dwyer 2000 差压表具有以下主要特点：1.高精度：采用先进的传感器技术，具有较高的测量精度和稳定性。
2.宽量程：可根据实际需求，选择不同量程的差压表。
3.抗干扰能力强：具有较强的抗电磁干扰和抗射频干扰能力，保证在复杂环境中的稳定测量。
4.耐腐蚀：采用不锈钢材质，具有良好的耐腐蚀性能。
5.易于安装与维护：结构简单，安装方便，便于日常维护。
【Dwyer 2000 差压表的工作原理】Dwyer 2000 差压表的工作原理基于差压传感器。
差压传感器通过测量流体在两个不同位置的压力，计算压力差，从而得到流体的差压值。
当流体通过传感器时，其中一个位置的压力较高，另一个位置的压力较低。
差压表将这两个压力信号转换为标准信号，如4-20mA 或0-10V 等，以供显示、记录或控制。
【Dwyer 2000 差压表的应用领域】Dwyer 2000 差压表广泛应用于以下领域：1.流量控制：通过测量管道中的压力差，可以计算出流速和流量，实现对流量的控制。
2.液位控制：在密闭容器中，通过测量容器内外的压力差，可以判断液位高度，实现液位控制。
3.设备维护：通过对设备内部流体的压力差进行监测，可以发现设备的异常情况，提前进行维护和保养。
【Dwyer 2000 差压表的操作与维护】1.操作：a) 在使用前，检查差压表的表头、传感器和连接管道是否完好。
Dwyer 的差压计 开关、数字压力计、数字压力差控、光谱压力计、流量计系列产品说明书
VISIT OUR WEBSITES: • • .auDigihelic ®Differential Pressure ControllerDigihelic ®Controller in Photohelic ®Gage, Square Root Output for FlowSeries DH31/8 FEMALE NPT LOW PRESSURE 1/8 FEMALE NPT HIGH PRESSURE SPECIFICATIONSService:Air and non-combustible, compatible gases.Wetted Materials:Consult factory.Housing Material: Die cast aluminum case and bezel.Accuracy:< 5˝ w.c. (except ±2.5˝ w.c.) : ±1%; All other ranges: ±0.5%at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).Stability:< ±1% per year.Pressure Limits:Ranges ≤ 2.5˝ w.c.: 25 psi; ±2.5”, 5˝ w.c.: 5 psi; 10˝w.c.: 5 psi; 25˝ w.c.: 5 psi; 50˝ w.c.: 5 psi; 100˝ w.c.: 9 psi.Temperature Limits:32 to 140°F (0 to 60°C).Compensated Temperature Limits:32 to 140°F (0 to 60°C).Thermal Effects:0.020%/°F (0.036/°C) from 77°F (25°C).Power Requirements:12-28 VDC, 12-28 VAC 50 to 400 Hz.Power Consumption:3 VA max.Output Signal: 4-20 mA DC into 900 ohms max.Zero & Span Adjustments:Accessible via menus.Response Time:250 ms (damping set to 1).Display:Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm status.Electrical Connections:15 pin male high density D-sub connection.18˝ (46 cm) cable with 10 conductors included. 4´ and 10´ cables available.Process Connections:1/8˝ female NPT. Side or back connections.Mounting Orientation:Mount unit in vertical plane.Size:5˝ (127 mm) O.D. x 3-1/8˝ (79.38 mm).Weight:1.75 lbs. (794 g).Agency Approvals:CE.SWITCH SPECIFICATIONS Switch Type:2 SPDT relays.Electrical Rating:1 amp @ 30 VAC/VDC.Set Point Adjustment:Adjustable via keypad on face.The Series DH3 Digihelic ®Differential Pressure Controller is a 3 in 1instrument possessing a digital display g age, control relay switches, and a transmitter with current output all packed in the popular Photohelic ®gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic ®controller is the ideal instrument for pressure, velocity and flow applications,achieving a 1% full scale accuracy on ranges down to the extremely low 0.25˝ w.c.to 2.5˝ w.c. full scale. Ranges of 5˝ w.c. and greater maintain 0.5% F.S. accuracy.Bi-directional ranges are also available.The Series DH3 Digihelic ®controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation;selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a hig h, low or hig h/low alarm;automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration. See applications below for some popular uses.APPLICATIONS • SCFM flow in ducts • Filter status• Static pressures in ducts or buildings • Damper control • Fan control ACCESSORIESA-298, Flat Aluminum Bracket for flush mounting . . . . . . . .$26.75A-370, Mounting Bracket flush mount bracket. Bracket is thensurface mounted. Steel with gray hammertone epoxy finish . . .31.00。
德维尔手持式压差计操作规程
德维尔手持式压差计操作规程本产品可以由用户自行重新校准。
校准按钮是调零按钮“ZERO”和调量程按钮“SPAN”，见图5。
共4个参数可以被重新校准：输入压差零点、输入压差满量程、模拟输出零点（即OV或4mA）和模拟输出满量程（即10V或20mA）。
输入压差和模拟输出是分别校准的。
这些被重新校准的参数都会存储在非易失存储器中，不需要外部电源或电池保持。
同时，出厂时的原始设置参数也会永久保存，以便随时恢复。
为完成重新校准工作，必须准备四个工具。
首先，需要有一个压力/压差发生源，它可以提供一个稳定的压力/压差输入，范围不小于该产品的测量范围。
同时，还要有一个数字或指针式压力/压差表（有些压力/压差发生源本身会配置这种表）。
此外，还需要有一个高精度的电压或电流表及稳定的电源，用来测试变送器的模拟输出及供电。
校准工作的步骤如下：准备：视被校准的变送器连接方式不同(两线或3线），按照正确的接线方式连接电流/电压表并接通电源。
一定要保证连接极性的正确。
同时，将被校准的产品按照垂直方向稳定安装。
注意：本产品无论是在校准过程还是在实际安装使用中，都必须是在垂直方向上!否则会大大影响产品的校准或使用的精度。
校准压差输入零点：把二个压差输入端空置在大气中，即不做任何压力连接，按下调零按钮“ZERO”并保持4-5秒钟。
此时，压差输入零点被重新校准。
如果配置了LCD显示模块，其显示值应该为0。
校准模拟输出的零点：首先把跳线开关PJ3设置在“F”位置，把PJ5设置在“K”位置，见图5，然后连续二次按下“ZERO”按钮。
该接钮必须在1秒钟内被均匀连续按下2次。
过快按2次也不可以。
按照产而输出形式的不同，此时，模拟输出应该在OV或4mA附近。
这时，再通过连续按下“ZERO”和“SPAN”按钮（此时该二个按钮分别相当于“UP”和“DOWN”按钮，即增加和减小），直到用高精度电压或电流表测试出的电压或电流在0.00 V或4.000 mA。
Dwyer Series 2000 Magnehelic 差压表说明书
Series2000Magnehelic® Differential Pressure GagesIndicate positive, negative, or differential. Accurate within 2%Service ManualDimensional EnlargementSelect the Dwyer Magnehelic gage for high accuracy - guaranteed within 2% of full scale - and for the wide choice of 81ranges available to suit your needs precisely. Using Dwyer's simple, frictionless Magnehelic movement, it quickly indicates low air or non-corrosive gas pressures--either positive, negative (vacuum) or differential. The design resists shock, vibration and over-pressures. No manometer fluid to evaporate, freeze or cause toxic or leveling problems. It's inexpensive, too.Widely used to measure fan and blower pressures, filter resistance, air velocity, furnace draft, pressure drop across orifice plates, liquid levels with bubbler systems and pressures in fluid amplifier or fluidic systems. It also checks gas-air ratio controls and automatic valves, and monitors blood and respiratory pressures in medical care equipment.MOUNTING. A single case size is used for most ranges of Magnehelic gages. They can be flush or surface mounted with standard hardware supplied. With the optional A-610 Pipe Mounting Kit they may be conveniently installed on horizontal or vertical 1¼" - 2" pipe. Although calibrated for vertical position, many ranges above 1 inch may be used at any angle by simply re-zeroing. However, for maximum accuracy, they must be calibrated in the same position in which they are used. These characteristics make Magnehelic gages ideal for both stationary and portable applications. A 4 9/16"hole is required for flush panel mounting. Complete mounting and connection fittings plus instructions are furnished with each instrument.Vent valvesIn applications where pressure is continuous and the Magnehelic gage is connected by metal or plastic tubing which cannot be easily removed, we suggest using Dwyer A-310A vent valves to connect gage. Pressure can then be removed to check or re-zero the gage.High and medium pressure modelsInstallation is similar to standard gages except that a 4 13/l6" hole is needed for flush mounting. The medium pressure construction is rated for internal pressures up to 35 psig and the high pressure up to 80 psig.Available in all ranges. Because of larger case, will not fit in portable case. Weight 1 lb., 10 oz. (Installationof the A-321 safety relief valve on standard Magnehelic gages often provides adequate protection against infrequent overpressure; see Bulletin S-101).PHYSICAL DATAAmbient temperature range: 20° to 140°F.* (-7° to 140°C)Rated total pressure: -20" Hg. to 15 psig.+ (-68 kPa to 103 kPa)Overpressure: Relief plug opens at approximately 25 psig (172 kPa)Connections: 1/8"' NPT female high and low pressure taps duplicated - one pair side and one pair back.Housing: Die cast aluminum. Case and aluminum parts Iridite-dipped to withstand 168 hour salt spray test. Exterior finish is baked dark gray hammerloid.Accuracy: Plus or minus 2% of full scale (3% on - 0 and 4% on - 00 ranges), throughout range at 70°F. (21°C) Standard accessories: Two 1/8" NPT plugs for duplicate pressure taps, two 1/8" pipe thread to rubber tubing adapter and three flush mounting adapters with screws. (Mounting and snap ring retainer substituted for 3 adapters in MP & HP gage accessories.)Weight: 1 lb. 2 oz. (460 g)* Low temperature models available as special option.+ For applications with high cycle rate within gage total pressure rating next higher rating is recommended. See Medium and High pressure options lower left.OPTIONS AND ACCESSORIESTransparent overlaysFurnished in red and green to highlight and emphasize critical pressures.Adjustable signal flagIntegral with plastic gage cover; has external reset screw. Available for most ranges except those with medium or high pressure construction. Can be ordered with gage or separately.LED Setpoint IndicatorBright red LED on right of scale shows when setpoint is reached. Field adjustable from gage face, unit operates on 12 -24 VDC Requires MP or HP style cover and bezel.Portable unitsCombine carrying case with any Magnehelic gage of standard range (not high pressure) includes 9 ft. (2.7 m) of 3/16"I.D. rubber tubing, stand-hang bracket, and terminal tube with holder.Air filter gage accessory packageAdapts any standard Magnehelic for use as an air filter gage. Includes aluminum surface mounting bracket with screws, two 5 ft. (1.5 m) lengths of 1/4" aluminum tubing, two static pressure tips and two molded plastic vent valves, integral compression fittings on both tips and valves.Quality design and construction featuresBezel provides flange for flush mounting in panel.1.2.Clear plastic face is highly resistant to breakage. Provides undistorted viewingof pointer and scale.3.Precision litho-printed scale is accurate and easy to read.4.Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidlymounted on helix shaft.5.Pointer stops of molded rubber prevent pointer over-travel without damage.6."Wishbone" assembly provides mounting for helix, helix bearings andpointer shaft.Jeweled bearings are shock-resistant mounted; provide virtually friction-free7.motion for helix. Motion damped with high viscosity silicone fluid.Zero adjustment screw is conveniently located in plastic cover, accessible8.without removing cover. O-ring seal provides pressure tightness.Helix is precision milled from an alloy of high magnetic permeability.Mounted in jeweled bearings, it turns freely to align with magnetic field ofmagnet to transmit pressure indication.9.Samarium Cobalt magnet mounted at one end of range spring rotates helix without mechanical linkages.10.Calibrated range spring is flat spring steel in temperature compensated design. Small amplitude of motionassures consistency and long life. It reacts to pressure on diaphragm. Live length adjustable for calibration.11.Silicone rubber diaphragm with integrally molded O-ring is supported by front and rear plates. It is locked and sealed in position with a sealing plate and retaining ring. Diaphragm motion is restricted to prevent damage due to overpressures.12.Die cast aluminum case is precision made. Iridite-dipped to withstand 168 hour salt spray test. Exterior finished in baked dark gray hammerloid. One case size used for all standard pressure ranges, and for both surface and flush mounting.13.Blowout plug of silicone rubber protects against overpressure on 15 PSIG rated models. Opens at approximately25 PSIG.14."O" ring seal for cover assures pressure integrity of case.15.SERIES 2000 MAGNEHELIC® - MODELS AND RANGESThe models listed below will fulfill most requirements. Custom models can be provided for OEM customers. For special units with scales reading in ounces per square inch, inches of mercury, other metric units, etc., contact the factory.STOCKED MODELS in boldModel NumberRange,Inchesof WaterMinorDiv.2000-00 + 2000-0 + 2001 2002 2003 2004 2005 2006 2008 2010 2015 2020 2025 2030 2040 2050 2060 2080 21002l500-.250-.500-1.00-2.00-3.00-4.00-5.00-6.00-8.00-100-150-200-250-300-400-500-600-800-1000-150.005.01.02.05.10.10.10.20.20.20.50.50.501.01.01.02.02.02.05.0Dual Scale Velocity UnitsModelNumberRange in W.C.IVelocity, F.P.M.MinorDiv.2000-00AV2000-0AV2001AV2002AV2010AV0-.25/300-20000-.50/500-28000-1.0/500-40000-2.0/1000-56000-10/2000-12500-----For use with pilot tube.ModelNumberRangeMM of WaterMinorDiv.2000-6MM +2000-10MM2000-25MM2000-50MM2000-80MM2000-l00MM0-60-100-250 500-800-100.20.20.501.02.02.0ModelNumberRangePascalsMinorDiv.2000-60 Pa +2000-125 Pa +2000-250 Pa2000-500 Pa2000-750 Pa0-600-1250-2500-5000-7502.05.05.010.025.0Zero Center Range2300-250 Pa2300-500 Pa125-0-125250-0-2505.010.0ModelNumberRangeKilopascalsMinorDiv.ModelNumber Range,Zero CenterInches of Water Minor Div .2300-0 +230123022304231023202330.25-0-.25.5-0-.51-0-12-0-25-0-510-0-1015-0-15.01.02.05.10.20.501.0Model Number Range PSI Minor Div.220122022203220422052210*2215*2220*2230**0-10-20-30-40-50-100-150-200-30.02.05.10.10.10.20.50.501.0*MP option standard **HP option standardZero Center Range2300-20MM +10-0-10.50Model Number Range CM of WaterMinor Div.2000-15CM 2000-20CM 2000-25CM 2000-50CM 2000-80CM 2000-l00CM 2000-150CM 2000-200CM 2000-250CM 2000-300CM0-150-200-250-500-800-1000-1500-2000-2500-300.50.50.501.02.02.05.05.05.010.0Zero Center Range2300-4CM 2300-10CM 2300-30CM2-0-25-0-515-0-15.10.201.02000-1 kPa 2000-1.5 kPa 2000-2 kPa 2000-3 kPa 2000-4 kPa 2000-5 kPa 2000-8 kPa 2000-10 kPa 2000-15 kPa 2000-20 kPa 2000-25 kPa 2000-30 kPa 0-10-1.50-20-30 40 50-80-100-150-200-250 30.02.05.05.10.10.10.20.20.50.50.501.0Zero Center Range2300-1 kPa 2300-3 kPa.5-0-.51.5-0-1.5.02.10Dual Scale English/Metric Models Model Number Range In. W.C.Range Pa or kPa 2000-0D 2001D 2002D 2003D 2004D 2006D 2008D 2010D0-0.50-10-20-30-40-60-80-100-125 Pa 0-250 Pa 0-500 Pa 0-700 Pa 0-1.0 kPa 0-1.5 kPa 0-2.0 kPa 0-2.5 kPa+ These rages calibrated for vertical scale position.AccessoriesOptionsSpecial Purpose Ranges A-310A , 3-Way Vent Valve A-321 Safety Relief Valve A-432 Portable Kit A-605 Air Filter Kit A-610 Pipe mount KitASF (Adjustable Signal Flag)HP (High Pressure Option)LT (Low Temperatures to -20°F)MP (Med. Pressure Option)SP (Setpiont Indicator)Scale No. 2401Square Root ScaleSpecify RangeScale No. 2402Blank Scale Specify RangeModel 2000-00N Range: -.05 to +.20" W.C.For room pressure monitoringSuggested SpecificationsA differential pressure gage for measuring (state purpose) shall be installed. Gage shall be the diaphragm-actuated dial type 4¾" O.D., with white dial, black figures and graduations and pointer zero adjustment. Gage shall be Dwyer Instruments, Inc., Magnehelic, Catalog No. 2__reading to __ water column, in. divisions.。
德维尔压差计操作规程
德维尔压差计操作规程Dwyer压差计用于测量井巷或管道流体中两点间压力差的仪器。
广泛应用于测量风扇和鼓风机的压力、过滤器阻力、风速、炉压、孔板差压、气泡水位及液体放大器或液压系统压力等，同时也用于燃烧过程中的空气煤气比值控制及自动阀控制，以及医疗保健设备中的血压和呼吸压力监测。
过压保护:标准Magnehelic®压差表耐压是15psig,不得在可能超过该限度的地方使用。
当压力超过25psig(不包括MP和HP型号)时，后置橡胶塞可作为安全阀拆卸和排气。
为了提供一个自由的压力释放路径，有四个垫片，当表面安装时，表面保持0.023“的间隙。
不要妨碍这些垫片产生的间隙。
安装：选择一个位置，不受过度的振动和环境温度不会超过140°F(60°C)。
此外，避免阳光直射，加速透明塑料盖的变色。
取压管线可以在任何必要的距离内运行。
长油管长度不会影响精度，但会略微增加响应时间。
不要限制取压管线。
如果脉动压力或振动导致指针过度摆动，请咨询工厂提供额外阻尼的方法。
所有标准Magnehelic®压差计与隔膜垂直校准,应该在那个位置用于最大的准确性。
如果要在垂直位置以外的位置使用表，应该在订单中说明。
许多更高量程的表将在其他位置的公差范围内工作，只需要重新调零。
只有在垂直位置使用0.5“w.cW0.25”的低量程型号和公制单位。
正压:将油管从压力源连接到两个高压端口之一。
插入未使用的端口。
向大气敞开一个或两个低压端口。
负压:从真空源或负压源连接油管到两个低压端口之一。
插入未使用的端口。
向大气敞开一个或两个高压端口。
压差:将两个压力源中较大的油管连接到任一高压端口，较低的油管连接到任一低压端口。
堵上两个未使用的端口。
当表的一侧在肮脏、尘土飞扬的空气中通气时，我们建议在开口端口安装A-331过滤器排气塞，以保持表的内部清洁。
A.对于便携式的临时安装使用使用1/8”管螺纹到橡胶管适配器和连接到压力源与柔性橡胶或乙烯管。
差压表德威差压表设备工艺原理
差压表德威差压表设备工艺原理工艺流程控制是现代制造业中最重要的技术之一。
在许多行业中，例如能源和化学工业，通过测量流体的差压来监测工艺和控制过程。
这就需要使用差压表设备。
德威（DWYER）差压表是一种流量和压力测量仪器，常用于工业、实验室等领域。
它的工作原理是利用两个管道中的流体的压力差，来确定液体或气体流量和流体静压力。
在本文中，我们将详细介绍差压表和德威差压表设备的工艺原理。
差压表在了解德威差压表设备的工艺原理之前，我们首先需要了解差压表的基本工作原理和用途。
差压表是用于测量两个位置之间压力或流动的仪器。
它是通过比较相邻两个位置的压力和流动来确定物质的流动量或压力。
差压计表是由两个压力传感器组成的，每个传感器位于要测量的两个位置之一。
如果这两个位置之间有一个流动，那么它们之间的压力差将随着流速和黏度而变化。
差压力传感器可以将这种压力差转化为电信号，并将信号发送到差压计表内部的计算机中进行处理。
差压计表可以测量流量和压力，因此它非常适用于石油和天然气行业中测量油、气和水的流量。
此外，差压计表在医院、实验室和工业环境中用于测量压力和流量。
另外，差压计表通常用于空调和供暖系统中，可以帮助管理空气流量和温度。
德威差压表设备德威（DWYER）是一个全球性的科学仪器和测量工具制造商，也生产并销售各种差压表设备。
德威差压表设备有许多不同的变体，包括液压差压表和气体差压表。
这些设备可以测量气体、液体和蒸汽中的压力，并在工艺流程中被广泛使用。
德威差压表设备的优点在于其准确性和可靠性。
这些设备使用高质量的传感器来测量压力和流量，因此准确度非常高。
此外，德威差压表设备的耐用性也非常好，在恶劣的环境中也能够正常工作。
差压表设备的工艺原理德威差压表设备的工艺原理与普通差压计表类似。
不同之处在于德威差压表设备能够根据测量范围选择不同的测量单元（如Pa、mmH₂O、inH₂O等）和测量介质（如气体、液体等）。
在测量流速时，德威差压表设备可以使用不同的差压配置。
honeywell压力变送器说明书
honeywell压力变送器说明书
一、产品概述
Honeywell压力变送器是一款高精度、高稳定性的压力测量设备，广泛应用于工业过程控制、流体测量等领域。
该产品采用先进的传感技术，能够准确测量各种气体、液体的压力，并通过智能化的数据处理系统，将压力信号转化为易于理解的数字或模拟信号，方便用户进行监控和管理。
二、产品特点
1. 高精度测量：采用先进的传感技术，测量精度高，能够满足各种高精度测量需求。
2. 稳定性好：传感器经过特殊处理，具有良好的稳定性和可靠性，能够在恶劣的环境条件下稳定工作。
3. 智能化数据处理：内置智能化数据处理系统，能够自动进行数据校准和处理，提高测量准确性。
4. 易于安装和维护：产品结构紧凑，安装简便，同时具有完善的自诊断功能，方便用户进行维护和保养。
5. 多种输出信号选项：可根据用户需求提供数字、模拟等多种输出信号选项，方便用户进行系统集成。
三、技术参数
1. 测量范围：可根据用户需求定制，一般可达0-1000psi或0-100bar等。
2. 精度：±0.5%或±1.0%等。
3. 工作温度：-40℃~85℃。
4. 工作压力：-10bar~60bar。
5. 输出信号：4-20mA或0-5V等。
6. 电源：10-30VDC。
7. 防爆等级：ExiaIICT6。
8. 防护等级：IP65。
四、使用注意事项
1. 使用前应先检查产品外观是否完好无损，附件是否齐全。
2. 使用时应根据具体测量介质和环境条件选择合适的压力变送器型号。
压差变送器的原理
压差变送器的原理压差变送器是一种用于测量流体压力差的仪器，它可以将压力差转换为标准信号输出，常用于工业自动化控制系统中。
它的原理是利用流体在管道中流动时产生的压力差来进行测量，通过压力传感器将压力信号转换为电信号，再经过放大、滤波、线性化等处理，最终输出标准的电流信号或电压信号。
下面我们将详细介绍压差变送器的原理。
1. 测量原理。
压差变送器的测量原理是基于伯努利定律和泊肃叶定律。
当流体在管道中流动时，由于管道截面积的变化或流体速度的变化，就会产生压力差。
根据伯努利定律，流体的动能、势能和静压力之和在流动过程中保持不变，因此流速增大时，静压力就会减小，反之亦然。
而根据泊肃叶定律，流体在管道中流动时，流速增大，静压力就会减小，流速减小，静压力就会增大。
因此，通过测量管道两端的压力差，就可以得到流体的流速或流量信息。
2. 结构原理。
压差变送器通常由压力传感器、放大电路、滤波电路、线性化电路和输出电路等组成。
压力传感器负责将压力信号转换为电信号，放大电路负责放大信号，滤波电路负责去除杂散信号，线性化电路负责将非线性信号转换为线性信号，输出电路负责输出标准信号。
整个结构设计合理，能够准确、稳定地测量流体压力差，并输出标准信号。
3. 工作原理。
当流体在管道中流动时，压差变送器的压力传感器会受到流体的作用，产生微小的变形，从而产生微小的电信号。
这个信号经过放大、滤波、线性化等处理后，就可以得到与压力差成正比的标准信号。
这个信号可以是电流信号，也可以是电压信号，常用的有4-20mA电流信号和0-5V电压信号。
这样，就可以实现对流体压力差的精确测量和准确输出。
4. 应用原理。
压差变送器的原理决定了它在工业自动化控制系统中有着广泛的应用。
它可以用于测量液体、气体等流体的压力差，从而实现对流体流速、流量的测量和控制。
比如在化工、石油、电力、冶金等行业中，可以用于测量管道流体的流速、流量，实现对流体的精确控制。
同时，它还可以用于测量气体、液体的密度、粘度等参数，为工艺控制提供准确的数据支持。
Dwyer Instruments 压差开关说明书
DWYER INSTRUMENTS, INC.| 34Adjustable Differential Pressure Alarm24 Volt or Battery Powered, Built-in Audible and Visual AlarmSeries BDPASPECIfICATIOnSService: Air and noncombustible, compatible gases.Wetted Materials: Diaphragm material: Silicone; Housing material,switch body: PA 6.6 and POM; Cover: Polystyrene.Temperature Limits: 32 to 122°F (0 to 50°C). Pressure Limits: 40 in w.c. (10 kPa).Electrical Rating: 1.0 amp @ 30 VDC/VAC.Switch Type: SPDT.Alarm Indication:Red LED and audible alarm.Alarm Level:Approximately 90 db at 4˝ (10 cm).Alarm Acknowledge:Button press.Power Requirements: 16 to 30 VDC, 18 to 30 VAC or 3.6 V LS14250lithium metal battery, installed functional, user replaceable. Battery acts as back-up if power is lost.Battery Life:Approximately 1.5 years with 3.6 V/1.2 Ah.Repeatability: ±15% FS.Electrical Connections: Screw terminals. M20x1.5 with cable strain relief or optional 1/2˝ NPT connection.Process Connections: 5/16˝ (7.94 mm) outside diameter tubing, 1/4˝(6.0 mm) inside diameter tubing.Mounting Orientation: Vertically, with pressure connections pointing downwards.Weight: 6.1 oz (173 g).Enclosure Rating: IP21.Agency Approvals: CE, RoHS.The Series BDPA Adjustable Differential Pressure Alarm audible and visual set point indication is designed for overpressure, vacuum,and differential pressure applications. The scaled adjustment knob allows changes to the switching pressure to be made without a pressure gage. The BDPA is available with settings from 0.08 in w.c. (20 Pa) to 20 in w.c. (5000 Pa).The silicone diaphragm and PA 6.6 body make the Series BDPA perfect for use with air and other noncombustible gases.The Series BDPA Adjustable Differential Pressure Alarms offer a versatile range of configurations allowing utilization of their many features. The BDPA can be powered by battery or 24 VDC/VAC line power. If connecting line power,the battery can act as back-up power in case of power outage. When set point threshold is reached, a local loud audible buzzer and bright LED will indicate periodically notifying of set point activation. An SPDT contact may also be wired to send a signal remotely to a DDC or building management system. A snooze button located through an opening in the cover can be pressed by the user to manually disengage the audible and visual indication until a maintenance operation is performed. If the instrument is mounted where it is difficult to access, a remote contact may be connected allowing the user to deactivate the buzzer and LED at the remote contact location.The Series BDPA Differential Pressure Alarm’s great functional versatility makes it perfect for filter, fan, and ventilation applications or any retrofit job where installing electrical wiring proves cost-prohibitive.RoHSPOWER INPUTCONTACT OUTPUTSNOOZE BUTTONLEDSee page 587 for process tubing options.b Items are subject to Schedule B discounts.ACCESSORIESA-288,“L” type metal mounting bracket with screws . . . . . . . . . . .$3.50A-289,“S” type metal mounting bracket with screws . . . . . . . . . . . .3.50A-468,Replacement battery for Series BDPA . . . . . . . . . . . . . . . .10.00A-480,Plastic static pressure tip . . . . . . . . . . . . . . . . . . . . . . . . . . .0.80A-481,Installer kit. Includes 2 plastic static pressure tipsand 7 ft (2.1 m) of PVC tubing tip . . . . . . . . . . . . . . . . . . . . . . . . . . .4.25A-489,4˝ Straight static pressure tip with flange . . . . . . . . . . . . . . .6.67。
dwyer ms121 ms111 ms321使用说明书美国德威尔
第1页 共4页
MS Magnesense® 微 差 压 变 送 器
电气连接：
两线制连接： 特别提醒: 电源电压不能超过额定值。否则，会引起 永久性损坏，这种情况不在产品保修范围内。两线制 （4-20mA）产品不能用交流电源。
在PCB的左下方，有一对螺丝端子TB1，+/-极性在上面表示的非 常清楚，请确保按图1所示连接正确。否则，有可能造成永久性 损坏，这将不在产品保修范围–内。
Velocity Displayed
Model MS-X2X MS-X1X
初始设定
English K* 2830 fpm K* 8950 fpm
Table 1
Metric K* 14.4 m/s K* 45.5 m/s
设定工程单位: MagnesenseTM 变送器可以非常容易地设置为英制或公制单位。 跳 线 开 关 PJ7 位 于 PCB 的 上 部 ， LCD 显 示 模 块 （ 如 果 配 置 ） 的 下 面。
调整滤波时间常数： 如果LCD显示模块被安装，用户可以调整其滤波时间常数。可调 节范围是0.5-15秒，以1秒为间隔。在有些空气系统中，压力的值 是很不稳定的，为了减少这类噪声干扰，特别提供了此功能设 计。
为此，需要设置调整时间常数模式。即将PJ3的跳线开关设置在位 置“F”，见图5。此时，LCD会显示该时间常数。这时，就可以调 整该常数了。方法是连续按下“ZERO”和“SPAN”按钮（此时 该二个按钮分别相当于“UP”和“DOWN”按钮，即增加和减 小），直到需要的时间常数被设定好（在LCD上可以看到这个过 程）。此时，再重新将该跳线开关恢复到原来的位置。不可以将 此开关留在“F” 位置上。工厂设定的该常数是0.5秒。
为最大限度地减小噪声干扰，建议使用屏蔽电缆，并将COM端接 地。
dwyer2000差压表中文说明书
dwyer2000差压表中文说明书DWYER2000差压表是一种精准测量气体或液体压力差异的仪器。
它采用了先进的技术和创新设计，可广泛应用于工业、航空航天、化工和环境监测等领域。
本说明书将详细介绍DWYER2000差压表的特性、使用方法以及常见问题解答，以帮助用户更好地了解和使用该仪器。
一、产品特性1. 高精度测量：DWYER2000差压表采用精密的传感器和电子元件，能够准确测量气体或液体的压力差异，并给出相应的数值显示。
2. 大屏幕显示：该差压表配备了宽大的液晶显示屏，可清晰地显示测量结果，使用户能够直观地了解压力变化情况。
3. 高度可调性：DWYER2000差压表支持用户根据具体需求进行测量范围的调整，从而满足不同应用场景的要求。
4. 简便易用：该差压表操作简单，具备友好的用户界面，方便用户进行设置和读取压力数值。
二、使用方法1. 准备工作：（1）确认差压表所需电源电压，确保供电电压在指定范围内。
（2）接通电源，等待差压表启动，并校正时间和日期。
2. 差压测量设置：（1）按下菜单键，进入差压测量设置界面。
（2）根据实际应用需求，选择差压测量的单位，例如帕斯卡（Pa）、毫巴（mbar）或千帕（kPa）。
（3）通过增加或减少测量范围值，设置适合测量对象的差压范围。
（4）根据需要，设置零点校准或自动校准功能，以确保测量结果的准确性。
3. 测量操作：（1）将测量探头与测量介质连接好，确保连接牢固并无泄漏。
（2）打开介质的流通通道，允许介质通过探头。
（3）观察差压表的显示屏，即可看到实时的压力差异数值。
4. 数据记录与分析：（1）差压表支持数据记录和存储功能，用户可通过查阅产品手册了解具体操作方法。
（2）通过数据记录功能，用户可以随时查看历史记录并进行数据分析，以便进行更全面、深入的研究。
三、常见问题解答1. 差压表的电池是否需要经常更换？答：DWYER2000差压表采用节能设计，电池寿命较长，并具备低电量提醒功能。
Dwyer 三相差压开关说明说明书
Explosion-proof,heavy duty, industrial unit has patented and unique new design whichprovides sensitivity to differential pressures as low as 10 inches of water (254 mm w.c.),yet handles total pressure of 1500 psi (103 bar). Unlike common differential pressureswitches that use a piston-type motion transfer, the Series H3 utilizes a rotary motiontransfer shaft that prevents a change in total pressure from causing a setpoint shift. Unityields deadbands approximately 5% of range, with zero setpoint shift due to variation inworking pressures. Friction is minimized and repeatability increased by allowing rangespring to act directly on diaphragm plate. Rolling diaphragm design maintains constanteffective area to further reduce friction. Diaphragm is allowed to “seat”, allowingapplication of full rated pressure, up to 1500 psi (103 bar), on either high or low pressureport, without damage. Special overtravel feature prevents overtightening of range adjustscrew. Choose optional 316SS chamber for water and water-based fluids or harsherSPECIFICATIONSWetted Materials: See pressurechamber and diaphragm material inmodel chart.Temperature Limit: -4 to 220°F(-20 to 104°C), ATEX: -20 to 90°C(-4 to 194°F).Pressure Limit: 1500 psig (103 bar).Enclosure Rating: Standard meetsNEMA 4X (IP56), drain option meetsNEMA 3 (IP54). For hazardous usesee the hazardous location ratingsElectrical Rating: 5A @ 125/250 VAC,30 VDC.Electrical Connections: See modelchart.Conduit Connection: 3/4˝ femaleNPT.Process Connection: 1/8˝ femaleNPT.Mounting Orientation: Vertical.Set Point Adjustment:Internal screw.Weight: 4 lb, 2 oz (2 kg).Deadband:Approximately 5% of Note:Shown without housing and cover.CI. II, Gr.E, F & GCompliant0344II 2 G EEx d IIB-20°C≤ T amb ≤ 75°C T60344II 2 G EEx d IIB-20°C≤ T amb ≤ 75°C T6。
dwyer德威尔dm-2005-lcd电流对应的压差
dwyer德威尔dm-2005-lcd电流对应的压差德威尔（Dwyer）公司是一家专业从事生产测量和控制设备的全球性公司。
其中，DM-2005-LCD电流对应的压差传感器是该公司的一款重要产品。
本文将结合德威尔公司的产品特点、技术原理和应用领域等方面，对DM-2005-LCD电流对应的压差进行详细介绍。
一、产品特点1.高精度DM-2005-LCD电流对应的压差传感器具有很高的测量精度，可以实现对压差的精准测量。
这在工业生产和实验研究等领域具有重要意义，可以保证产品质量和实验数据的准确性。
2.多种量程选择DM-2005-LCD电流对应的压差传感器提供了多种不同的量程选择，可以适应不同范围的压差测量需求。
用户可以根据实际需求选择合适的量程，从而更好地满足应用要求。
3. LCD显示屏该传感器配备了LCD显示屏，可以直观地显示压差数值，方便用户进行实时监测和数据采集。
这一设计使得传感器的使用更加便捷，提高了工作效率。
4.全面的安全保护DM-2005-LCD电流对应的压差传感器具有全面的安全保护功能，可以有效防止因外部环境因素导致的传感器性能下降或损坏。
5.易于安装和维护该传感器具有简单的安装和维护流程，用户可以快速上手并进行操作。
这为用户节省了宝贵的时间和精力，提高了工作效率。
二、技术原理DM-2005-LCD电流对应的压差传感器采用了先进的电子技术和传感技术，其工作原理主要包括如下几个方面：1.电流输入传感器接收外部电流输入信号，并将其转化为相应的压差数值。
这一过程经过内部的精密电路和处理器进行处理，从而实现对压差信号的精准转换和处理。
2.压差测量传感器利用特定的测量原理，对输入的电流信号进行压差测量。
该测量过程中，传感器内部的测量元件将压差信号转换为电信号，并经过放大和滤波等处理，最终输出为可读取的数值。
3. LCD显示传感器通过LCD显示屏将测量得到的压差数值直观地显示出来，方便用户进行实时监测和数据采集。
dwyer压差表校准证书
dwyer压差表校准证书
Dwyer压差表是一种用于测量压力差的仪器，通常用于气瓶压力的测量。
为了确保其准确性和可靠性，需要定期进行校准。
校准证书是证明Dwyer压差表经过校准并符合相关标准的文件。
该证书通
常包括以下内容：
1. 证书编号和校准日期：用于标识证书和记录校准的时间。
2. 仪器型号和序列号：用于标识被校准的Dwyer压差表。
3. 校准依据的标准和规范：指明校准过程中所依据的国家标准、行业标准或其他规范性文件。
4. 校准结果：详细记录校准过程中的各项数据和结果，如压力范围、精度、误差等。
5. 校准结论：根据校准结果，给出Dwyer压差表是否符合相关标准的结论。
6. 校准人员和审核人员签名：证明证书的有效性和权威性。
为了获得Dwyer压差表的校准证书，可以联系专业的校准机构或实验室进
行校准并申请证书。
这些机构通常会根据相关标准和规范，对Dwyer压差
表进行严格的测试和检查，以确保其准确性和可靠性。
Dwyer Capsuhelic 压差仪说明书
The Capsuhelic ®gage is designed to give fast, accur ate indication of differ ential pressures. The gage may be used as a readout device when measuring flowing fluids,pressure drop across filters, liquid levels in storage tanks and many other applications involving pressure, vacuum or differential pressure.Using the basic design of Dwyer’s time-proven Magnehelic ®gage, the Capsuhelic ® gage contains a simple, frictionless movement that permits full scale readings as low as 0.5 inch water column. The pressure being measured is held within a capsule which is an integral part of the gage. This containment of the pressure permits the use of the gage on system pressures of up to 500 psig, even when differentials to be read are less than 0.1 inch w.c. The diaphragm-actuated Capsuhelic ®gage requires no filling liquid which might limit its outdoor applications. Zero and range adjustments are made from outside the gage, and there is no need to disassemble the gage in normal service.Note:May be used with hydrogen where pressures are less than 35 psi. Order with a Buna-N diaphragm.Series 4000Capsuhelic ®Differential Pressure GagesMeasures Pressure, Vacuum or Differential, Suitable for Internal Pressures to 500 psigSPECIFICATIONSService: Aluminum case: Air and compatible gases and oil based liquids;Brass case: Air and compatible gases and water based liquids.Wetted Materials: Consult factory.Housing: Die cast aluminum with impregnated hard coating, standard. Optional forged brass housing is required for water or water based fluids. Special material diaphragms available, contact factory.Accuracy: ±3% of full scale at 70°F (21.1°C). (±2% on 4000S models, ±4% on 4200, 4210, 4215, 4220, 4300, 4400, and 4500).Pressure Limits: -20˝ Hg to 500 psig. (-0.677 bar to 34.4 bar).Temperature Limits: 20 to 200°F (-6.67 to 93.3°C).Size: 4˝ (101.6 mm) diameter dial face.Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.Process Connections: 1/4˝ female NPT high and low pressure taps, duplicated -one pair top for air and gas, and one pair bottom for liquids.Weight: 3 lb, 3 oz (1.45 kg) aluminum case; 7 lb, 13 oz (3.54 kg) brass case.Standard Accessories:Two 1/4˝ NPT plugs for duplicate pressure taps, four flush mounting adapters with screws and four surface mounting screws.Straightforward design assures maintenance-free performanceSeries 4000 Capsuhelic ® GageScales reading directly in flow, heights, etc., are also available.Bezel provides flange for flush mounting in panel. O-ring seal for cover assures dust tight integrity of case.Clear plastic front cover is highly resistant to breakage. Provides undistorted viewing of pointer and scale.Precision scale,screen printed on aluminum, is accurate and easy to read.Samarium cobalt magnet mounted at end of range spring rotates helix without mechanical linkages.“Wishbone” assembly provides mounting for helix,helix bearings and pointer shaft.Thin wall magnetic “window”is well braced and of minimum area for maximum pressure capability. Jeweled bearings for helix are shock resistant mounted. They provide virtually friction-free rotation for helix. Rotation is damped with high viscosity silicone fluid.Helix is precision milled from an alloy of highmagnetic permeability, mounted in jeweled bearings,and rotates to align with magnetic field of magnet and transmit pressure indication to pointer.Zero adjustment screw is conveniently located in plastic cover, accessible without removing cover. “O”ring seal provides dust seal.Top low pressure connection (for Air or Gas )connects to chamber in back of diaphragm. High pressure air or gas port (cut away; not shown)connects with chamber in front of diaphragm through passageways in case.Precision made case is offered in two materials.Standard is die cast aluminum coated inside for resistance to most oils and similar fluids. Optional forged brass case is recommended when using water or water based liquids. One case size for all pressure ranges — can be either surface or flush mounted. Silicone rubber diaphragm with integrally molded O-ring is sealed between the case and backplate.Diaphragm motion is restricted to prevent damage due to over-pressure.Diaphragm support plate of stainless steel minimizes position or attitude sensitivity.Calibrated range spring is a flat leaf of nickel plated spring steel. Small amplitude of motion assures consistency and long life. It reacts to pressure ondiaphragm. Live length factory adjusted for calibration. Bottom high pressure connection (for Liquids)connects to chamber in front of diaphragm. Lowpressure liquid connection (not visible) connects with chamber in back of diaphragm through passageways in case.Range spring calibration is set by custom camlock. Rate adjust and rate adjust lock are coaxial and are factory set and sealed.ACCESSORIESA-298,Flat Flush Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .$26.75A-309,3-way Manifold Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284.00A-314,Bleed Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10.25A-370,Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31.00A-471,Portable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .501.00A-496,Flush Mount Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15.25A-610,Pipe Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24.00OPTIONSAdd Options as Suffix, Example 4001-ASF-ASF (Adjustable Signal Flag) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .add $10.00B (Brass Case) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .add 139.00Scale Overlays - Red, Green, Mirrored or combination. Specify Locations . . . . . . . . .add 20.00net。
Dwyer Series WDPM 无线差压模块安装和操作指南说明书
Series WDPM Wireless Differential Pressure Module to Models UHH and UHH2 or the Dwyer Mobile Meter ® app to view pressure drop across filters, static pressure in ducts, and velocity pressures from pitot tubes or air flow stations. When using it with a pitot tube or air flow measuring station, the measurement read directly in air velocity or volumetric mounts in the holder on the back of the handheld, or in an optional mounting bracket.Wireless modules can take measurements from at least 50 feet away from the base on the top of the module to let the CHARGING BATTERYWhen the charge of the battery is almost used up, the LED on the module of the wireless probe will turn solid red. There is approximately 5 minutes of battery life left at this point. If the module is not already paired to the base unit, it will not pair while in low battery condition.Step 1: Plug the mini-USB connector end of the cable into the top of the module.Step 2: Plug the USB connector end of the cable into the port on the charger or PC (LED on the charger and the module should both light up).Step 3: The LED on the module will turn off when fully charged.Step 4:Remove USB cable from the module and the charger or PC.Cet appareil est conforme à des règlements d’Industrie Canada exempts de licence standard RSS (s). Son fonctionnement est soumis aux deux conditions suivantes: (1) Ce dispositif ne doit pas causer d’interférences nuisibles, et (2) cet appareil doit accepter toute interférence reçue, y compris les interférences pouvant entraîner un fonctionnement indésirable.This Class B digital apparatus complies with Canadian ICES-003.Cet appareil numériqué de la classe B est conformé à la norme NMB-003 du Canada.It is required before the initial use of the module to fully charge the battery for 12 hours.If desired, it can be operated with USB powered cables less than 3 m in length when connected to the charger or PC.Table 1Lithium ion batteries are very volatile and can cause a fire if punctured or severely damaged. Only use a Dwyer Instruments,Inc. approved charging device in a well ventilated area away from any flammable materials or gases. Do not incinerate the battery. Only charge between 32 to 113°F (0 to 45°C).USING WITH UHHPairing with Wireless Probes1. Turn on Model UHH Universal Handheld by pressing the button.2. Press the and buttons to scroll through the menu headings at the top of the display.3. When PROBE is highlighted, hit the button to access the probe menu.4. Press the directional arrow to scroll through the sub-menu headings. Thecurrent selected parameter will be highlighted in yellow.5. When PAIRING MODE is highlighted, hit the button to access the pairing mode.6. Turn on the wireless probe(s) to be paired. After a period of up to 15 to 20seconds, the UHH screen will update with the information about the wireless probe(s) just turned on.7. Press the button to scroll through the available probes. The current selectedprobe will be highlighted in yellow.8. When the desired probe to be paired is highlighted, hit the button to pair theprobe. Once it is paired, it will be removed from the list automatically.9.Once all the desired probes are paired, press button.10. Repeat step 9 to go back to the home screen and begin readings.USING WITH UHH2 OR MOBILE METER® APPPairing with Wireless ProbesFor the latest instructions, please refer to the “Help” button in the Options menu in the Mobile Meter® app.1. Verify that the UHH2 or handheld device has Bluetooth® technology turned on andis connected to the wireless gateway. Open the Mobile Meter® app by clicking on the icon.2. Press “Get Started”.3. Near the bottom, a pop-up will display a message that reads “Bluetooth issearching for bridges...”. When a bridge is turned on and discovered by MobileMeter® the pop-up will display “Mobile Meter has CONNECTED to the Bluetooth device: PROBEBRIDGE_XXXXXX” where XXXXXX is the probe’s serial number.4. Click on the Options menu and select “Setup”.5. In the Setup page, probes can be discovered and paired to the Mobile Meter®app. After the Mobile Meter® app connects to a bridge, a probe can be discovered.To discover a probe, simply turn on the probe by pressing the button on the handle and it will show up in the Setup list.6. Use the back button or navigation arrow to go back to the Probes List page.WIRELESS GUIDELINES IN ACCORDANCE WITH FCC:Changes not expressly approved by Dwyer Instruments, Inc. could void the user’s authority to operate the equipment.This product complies with FCC OET Bulletin 65 radiation exposure limits set forth for an uncontrolled environment.Pursuant to FCC 15.21 of the FCC rules, changes not expressly approved byDwyer Instruments, Inc. might cause harmful interference and void the FCC authorization to operate this product.Canadian Government Guidelines:Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.INFORMATION TO THE USERPower Output: 6 mWOperating Frequency: 2.4 GHzOperating Channel: 11Operating Mode: IEEE 802.15.4, Zigbee, Direct Sequence Spread SpectrumData Rate: Up to 250 kbpsIntended Use: Industrial/commercial HVACAntenna Connection: Internal only, non-tunableBattery Removal:If, for some reason, the wireless probe needs to be returned to Dwyer Instruments, Inc. for maintenance or repair, the rechargeable lithium ion battery needs to be removed prior to shipping the unit. Before attempting to remove the battery ensure the probe has been powered down. To remove the battery, set the wireless probe face down on a non-abrasive surface. There are four Phillips head screws that secure the two halves of the handle together. Two are located under the serial number label at the top of the probe and two are located at the bottom of the unit. When lifting the ends of the serial label to access the screws be careful to not damage the label such that the serial number cannot be read. Remove the four screws with a suitable Phillips screw driver and set aside the back half of the housing. Remove the battery by grasping the black plastic connector on the battery wire harness and pull straight out while securing the black plastic connector on the circuit board with the other hand. Be careful to not puncture the battery as this may cause a fire. Remove the battery and set aside. Securely replace the four screws to hold the handle of the probe together. The unit may now be packaged for shipping back to Dwyer Instruments, Inc. MAINTENANCE/REPAIRUpon final installation of the Series WDPM, no routine maintenance is required. The Series WDPM is not field serviceable and should be returned if repair is needed. Field repair should not be attempted and may void warranty.WARRANTY/RETURNRefer to “Terms and Conditions of Sales” in our catalog and on our website. Contact customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem, plus any additional application notes.Bluetooth®is a registered trademark of Bluetooth SIG This symbol indicates waste electrical products should not be disposedof with household waste. Please recycle where facilities exist. Check withyour Local Authority or retailer for recycling advice.If a module does not appear, power the module down, then powerit back on.It is recommended that only four probes be selected due to thebandwidth limitations between the UHH2/Mobile Meter® app andthe gateway.Printed in U.S.A. 2/19FR# 444099-00 Rev. 4©Copyright 2019 Dwyer Instruments, Inc.。
dwyer数显压差
标题：Dwyer数显压差：原理、应用及优势引言：Dwyer数显压差是一种常见的测量设备，广泛应用于工业、实验室和建筑等领域。
本文将详细介绍Dwyer数显压差的原理、应用以及其在压差测量中的优势。
第一部分：原理1. 工作原理：Dwyer数显压差利用静压孔板、差压传感器和数字显示器组成的系统，测量两个压力点之间的差值。
2. 静压孔板：静压孔板是一种特殊设计的装置，通过孔板上的多个小孔将气体或液体流过，产生压差信号。
3. 差压传感器：差压传感器接收静压孔板产生的压差信号，并将其转化为电信号。
4. 数字显示器：数字显示器将电信号转换为可读的数值，提供准确的压差读数。
第二部分：应用1. HVAC系统：Dwyer数显压差可用于监测供暖、通风和空调系统中的空气流动情况，确保系统正常运行。
2. 实验室设备：在实验室中，Dwyer数显压差可用于测量实验室通风系统中的气流速度和压力变化，确保实验环境的安全性。
3. 工业过程控制：Dwyer数显压差广泛应用于工业过程控制中，如管道流量监测、过滤器堵塞检测等，以确保工艺流程的正常运行。
4. 清洁室监测：在生产过程中，如半导体、医药等领域，对清洁室内的空气流动和过滤效果要求极高，Dwyer数显压差可提供准确的压差读数，确保清洁室的正常运行。
第三部分：优势1. 准确性：Dwyer数显压差采用先进的传感技术和数字显示器，提供高精度的压差读数，能够满足各种应用需求。
2. 可视化：数字显示器直观地显示压差数值，使操作人员可以即时了解系统状态，及时采取相应措施。
3. 灵敏度：Dwyer数显压差对小范围的压差变化非常敏感，能够准确监测微小的压力变化。
4. 可靠性：Dwyer数显压差采用高质量的材料和工艺制造，具有较高的可靠性和耐用性，适用于各种恶劣环境。
结论：Dwyer数显压差是一种应用广泛的测量设备，通过静压孔板、差压传感器和数字显示器的组合，提供准确的压差读数。
它在HVAC 系统、实验室设备、工业过程控制和清洁室监测等领域有着重要的应用价值。
DWYER 仪器有限公司 166 Series 490W无线热水差压仪说明书
MODEL CHART
Model
English Range Metric Range
490W-6-HKIT
0 to 50 psi,
0 to 344.7 kPa,
0 to 200 psi
0 to 1379 kPa
490W-6-HKIT-NIST 0 to 50 psi,
FEATURES/BENEFITS • Rugged weatherproof handheld housing withstands 1.5 meter drop test • Wireless measurement of differential pressure, single pressure and air flow • Bluetooth direct wireless communication provides range up to 65 ft (19.8 m) • The ergonomic design is much lighter and easier to work with, providing greater
5/8 [16]
1.000 .944 HEX
2.940
VIDEO ON
LINE
Manometers, Portable
Series 490W Wireless Hydronic Differential Pressure Manometer is the most accurate and easy to operate manometer on the market. By using wireless transducers and a versatile handheld, a single operator can monitor and balance a hydronic system in less time than traditional hydronic balancers. The Series 490W utilizes mobile technology to communicate via a Bluetooth connection with the transducers to monitor differential pressure and flow on up to three different valves. Being wireless means there are no hoses to carry, snag on equipment or needing to be drained. The 490W includes the Dwyer Hydronic Application Software that contains valve charts for numerous manufacturers, which converts differential pressure to flow directly on the screen.
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Dwyer压差变送器
简介
Dwyer压差变送器是一种用于测量液体、气体、蒸汽、气溶胶等流体在管路中
压差的传感器。
它能够将压差变化转换为电信号输出，通过这个信号就能够监测流体的流量和压力。
Dwyer压差变送器广泛应用于各种工业、建筑、医疗、环保等
领域，具有可靠性高、精度高、反应迅速等特点，是流量测量的必备设备之一。
工作原理
Dwyer压差变送器实际上是由两个管道、一个弹性隔膜和一个电路板组成。
当
流体通过两个管道时，由于阻力不同导致了两个管道之间的压差，这个压差将会作用于弹性隔膜。
弹性隔膜会因为压差的作用而产生形变，从而被压缩或伸展。
弹性隔膜上的位置传感器会感知到这个形变，然后将其转变为电信号输出。
Dwyer压差变送器在实际应用中需要与压力变送器或流量计等设备配合使用。
通过与其他设备的配合，可以实现对流体的精准测量和控制。
特点
1.精度高：Dwyer压差变送器的精度非常高，通常在0.5%~1%之间。
2.响应迅速：Dwyer压差变送器的响应速度非常快，可以在毫秒级别
内完成信号的转换。
3.体积小：Dwyer压差变送器体积小，能够适应各种安装环境，同时
不会占用过多空间。
4.稳定可靠：由于Dwyer压差变送器采用先进技术和高质量材料，能
够确保长时间的稳定性和可靠性。
5.维护简单：Dwyer压差变送器采用结构简单的设计，方便用户进行
维护和保养。
应用领域
Dwyer压差变送器广泛应用于各个领域，包括：
1.建筑行业：在HVAC系统中，测量空气流量、空气压力等。
2.工业领域：通过监测流体在管道中的压差，实现对流量的测量和控制。
3.医疗行业：在氧气供应系统中，监测氧气质量和流量。
4.环保领域：测量烟气流量和空气流量。
总结
Dwyer压差变送器是一种先进的流量测量设备，具有精度高、响应迅速、稳定
可靠等特点。
它不仅被广泛应用于建筑、工业、医疗、环保等领域，而且可以与其他设备配合使用，实现对流体的精准测量和控制。
通过不断的技术创新和产品升级，Dwyer压差变送器将继续成为流量测量领域的佼佼者。