DP4四位半智能电流电压表说明书
DP4-PRDV20电压表说明书
11读数保持功能
12 数码管显示颜色:高亮红,蓝色,翠绿色,白色四种可选
3尺寸与接线端子图:
4 量程说明:
IN5135直流电压电流表常用量程: 允许输入满量程的120% 注:如一个直流20VDP4-PRDV20电压表只能测量20V之内电压,但不可以测电流。
满量程
分辨率
10mA
0.01Ω
提示 2510(5芯Байду номын сангаас子)仪表为直流5V供电,3.96(4芯端子)可以做直流5V 12V 24 V 交流9-12V 特殊工作电压可以定制
5 应用举例: 6 注意事项:
例:某电器标称额定工作电压为直流24V电流为8A我们采用数字表去监测电流电压值1选择IN5135-DC-200V IN5135-DC-10A/75mV各一只2辅助电源;DC5V/200mA稳压电源2个
输入电阻
量程扩展说明
±199.9mV
100uV
100MΩ(内阻)
1:表格列出量程可以直接信号接入测量,当电流大于5A以上需外接分流器来扩展量程,最大可配2000 A/75mV分流器来测量2000A之内的大电流. 特殊量程可以定制。例:如用户需要测量50A的直流电流,那么就需要50A/75mV分流器配合直流0-75mV显示0-50.0的数字表头来实现测量。2: 测量电压高于700V必须采用机外分压。例:如测量直流2000V高压,采用2000V/100V分压器分压配合直流0-100V输入显示0-1999的数字表来扩展测量。
2功耗≤60mA
3超量程千位显示1或-1后三位不显示
4 工作温度:-10~60℃ 湿度:85%以下
5显示字高0.56英寸
6测量速率约2.5次/秒 准确度:0.2%±2个字
DP4、DP4-EVF商品说明书
Table of ContentsProduct Introduction (3)Caring for your DP4 Monitor (4)Caring for your DP4-EVF Viewfinder (5)Positioning the Eyecup (5)What should be in the box: (6)DP4 Monitor: (6)VF Only: (6)DP4-EVF Combined: (6)DP4 Diagram (7)Powering the DP4: (8)The Power Switch (8)Battery Plates: (9)Powering with AC/DC Power: (11)The DP4-EVF: (12)Overview (12)Attaching the VF to the DP4 (13)Detaching the VF from the DP4: (14)Using the DP4-EVF (15)Using the DP4 (16)Operating the Menus (16)The Preset Menu: (17)DSLR Scale Presets (18)Assigning Function Buttons (19)Image Menu (20)Advanced Menu (21)False Color (22)1:1 Mapping (23)Input Menu (24)Changing inputs: (24)System Menu (25)Misc Menu (26)PIP Menu (26)Accessories (27)Attaching the Acrylic Screen Protector (27)Attaching the Sunhood (28)Updating Firmware (29)Specifications (30)Warranty (31)Thank You! (32)The DP4 The VF The DP4-EVF Product IntroductionOn Camera Field MonitorAn affordable, durable, 4.3-inch on-camera monitor packed full of inputs, outputs and professional software features. Extensive menu options plus a simple user interface, means quick and meaningful visual feedback when dialing in crucial details such as focus and exposure.Viewfinder Loupe Accessoryfor the DP4 MonitorAn optical loupe accessory designed to attach to the DP4 Field Monitor. This flip -up eyepiece adds the functionality of an EVF to the DP4, but does not remove its functionality as a monitor.Monitor/Viewfinder ComboThe Resulting combination the “DP4” and “VF” shownabove. The DP4-EVF operates seamlessly as either a4.3-inch monitor or as an EVF by simply flipping theeyepiece up or down and results by combining the“DP4 and “VF” shown above.Caring for your DP4 Monitor* The DP4’s DC input is CENTER PIN POSITIVE. Always check polarity of any custom cable implementations. SmallHD is not liable for any power related damage to your monitor due to incorrect polarity.* The DP4’s max input voltage is 18v DC. Over powering can result in damage to your DP4. SmallHD is not liable for any damage due to overpowering the unit.* Not all power sources are created equal. Using off-brand (non-Canon) LP-E6 batteries can result in undesired performance and longevity issues.* Do not attempt to disassemble the DP4. Doing so voids warranty.* If the DP4 is exposed to significant amounts of water, do not power on and contact SmallHD support. Water damage is not covered by warranty, but taking the right precautions when a water event occurs can sometimes preserve unit functionality.* Clean the screen with a high quality microfiber cloth only. Never spray the screen directly with any sort of cleaning fluid.* Always ask us if you have any questions about general operation. Contact SmallHD at /support*Much more information about the DP4 and other SmallHD products can be found online on our website and in video form at Caring for your DP4-EVF Viewfinder * Heed all instructions listed above regarding the DP4 Monitor* Do not expose the entrance of the EVF lens to direct sunlight. Doing so can magnify the sun and cause damage to the screen.* The aluminum lens assembly is air tight and sealed. Do not attempt to disassemble, as risk of contamination from dirt, dust and moisture can occur.* Clean the outside lenses as lightly as possible with a clean microfiber cloth only.Positioning the EyecupThe EVF Eyepiece is fixed to the assembly in a way that allows easy rotation and removal. The eyecup can also be positioned forward and back for optimal comfort.What should be in the box:DP4 Monitor:1.DP4 Field Monitor2.Sunhood3.Mini-HDMI Cable (1.5ft)4.YPbPr Breakout Cable (4ft)5.Hotshoe Ball Mount Power Supply7.Acrylic Screen Protector8.SmallHD Cleaning ClothVF Only:1.DP4 VF Adapter2.SmallHD Cleaning Cloth3.Circular Eyecup4.Lens CapDP4-EVF Combined:1.All of the aboveDP4 Diagram/ Composite OutPowering the DP4:The DP4 has two methods for powering:* Batteries, using the interchangeable battery plates* AC/DC Power, using the Barrel Power input on the back of the unit.The Power SwitchThe DP4 has a dual position power switch that distinguishes between using battery power, or the rear DC barrel power input. The switch has a depressed state (down) and a raised state (up). To use batteries, the switch should be DOWN. To use AC/DC Power via the barrel power input, the switch should be UP.Battery Plates:The DP4 comes standard with the dual battery plate of your choosing that is removable/replaceable with other types of plates. * Batteries can be used either in a single or double arrangement * Power switch should be depressed to activate battery power* Battery voltage can be read onscreen in the DP4 Menu System by activating “Voltage Meter” in the “System” Menu.Removing Battery Plates:The battery plates are not attached by screws, they just need the correct amount of force applied in the correct places to detach from the DP4 body. Some popping noises may occur during the battery plate removal process—this is normal and expected.Method 1:The recommended method is to insert a small flat-head screwdriver into the corner slot where the battery plate meets the metal body, then pull towards the rear of the DP4, lifting the corner of the plastic plate away from the metal DP4 housing.Method 2:Thread the ¼ 20 thread of the included ball mount into one of the two side ¼ 20 mounts a few times, then pull towards the rear using the body of the ball mount as leverage, while pushing the center of the back of the plate with your thumb.Replacing Battery Plates:Replacing battery plates is as simple as aligning the plate to the back of the DP4 and pressing in on the 4 corners. You should hear 4 audible “click” noises to confirm that it is completely attached.Powering with AC/DC Power:The DP4 has a barrel power input for powering from a wall using the included power supply, or from other sources such as Anton Bauer batteries.The specifications of this plug are below:**ALWAYS CHECK POLARITY BEFORE USING ANY POWER SOURCE THAT ISN’T THE INCLUDED POWER SUPPLY.The DP4-EVF:The DP4-EVF as a unit combines the DP4 Monitor (aka "DP4") and the DP4 Viewfinder Loupe Accessory (aka "VF"), which simply fixes to the front of the DP4 without the need for screws or adhesive. OverviewAttaching the VF to the DP4* Hold the VF with one hand and with the other, put one side of the DP4 in place, and then firmly press down on the other side to snap the VF in place.Detaching the VF from the DP4:Using your thumb, pull one of the side tabs of the VF back, then release the DP4 from that side—the other side will come out on its own once the first side is free.Using the DP4-EVF* The DP4-EVF incorporates magnets and a hinge to operate in two modes, closed and open. This makes it easy to quickly go from shooting mode to review mode, since you will not have to fiddle with latches or screws.* To adjust the eyepiece, simply rotate it to the most comfortable position.* The front of the lens assembly has standard 46mm threads for the use of diopters and UV filters. This will add thickness to the front and in some cases may protrude too far for comfort. This can be resolved by pulling the rubber eyecup back until it is flush around the very first element.Using the DP4Operating the Menus1 –Navigation Scroll Wheel* Click to activate Main Menu* Click to select items in menu* Scroll right and left to adjust values*(From no menu) Scroll any direction to access Preset menu2 –Back button/Preset A* Press to reverse out of the menu* Activate/deactivate Preset3 –Preset B Button* Activate/deactivate PresetActivating the menu and adjusting a function:1 – Click the scroll wheel one time2 – Roll the scroll wheel left or right to the proper sub menu3 – Click the wheel to select the sub menu4 – Roll the wheel to select the desired menu item5 – Click the wheel to select the desired menu item6 – Roll the wheel left or right to adjust the value7 – Press the back button to exit out of the menu systemVideo Tutorial:/Videos/dp4-user-interface-tutorial/DSLR Scale PresetsThe DSLR Scale presets are factory defined presets that enable the input signal from a variety of DSLR cameras to fill the screen of the DP4. Most monitors are unable to achieve this function. Special logic is in play when these presets are activated that keeps the image in full-screen mode even though the video signal may be changing aspect ratios behind the scenes (as in the case of the Canon 5D Mark 2, 60D, T2i, and T3i). As a result, the "Scale" and "CustomScale" menu functions are locked while using these presets.NOTE: Use preset "C DSLR REC" for Canon DSLR cameras during LiveView/Record mode. Use preset "N DSLR REC" for Nikon DSLR cameras during LiveView/Record mode. (*If using the Nikon D800 you can just use preset one on your monitor.) Use preset "PLAYBACK" when reviewing footage already recorded onto the Canon/Nikon DSLR.Assigning Function ButtonsThe DP4 has two buttons that can be assigned to custom functions for a convenient one press on/off of your favorite features.While not in any menus:1 – Press and hold either of the two buttons (A or B) for 3 secondsand release2 – Scroll with the scroll wheel to the desired function and clickthe scroll wheel to select it3 – Press the Back button to exit the menuImage MenuThe image menu controls Brightness, Contrast, Hue, Saturation, Sharpness and Gamma. Below is a description of each. Function Range DescriptionBrightness 0-100 Controls the maximum black point of the signal.Contrast 0-100 Controls the maximum white point of the signal.Hue 0-100 Also known as Tint or Phase.Saturation 0-100 Also known as Chroma.Sharpness 0-100 Amount of edge enhancement is applied.RGB Control 0-100 Adjusts RGB Gain and Offset for all 3 color channels.Gamma 2.2 Standard Gamma adjustment.Advanced MenuThe Advanced menu provides access to the many software tools of the DP4 to, among other things, aid in focus and exposure.Some of the functions are explained in greater detail in later pages, marked by the asterisk (*).Function Range DescriptionFocus Assist + On, Off Darkens image and outlines area in focus in white.False Color* HML, HL Overlays varying IRE levels in specific colors.Peaking On, Off Over-sharpens the image to give a frosted look to areas in focus.1:1 Mapping* On, Off Maps the native signal data to the screen of the DP4 –one native pixel to one DP4 screen pixel, no scaling.Scale 16:9, 4:3,2.35:1,1.85:1,AUTODefines the initial scalingparameters for the DP4.16:9, 4:3, etc.CustomScale 0-1000(x4) Stretch, shrink and move the image on screen pixel-by-pixel.Blue Only On, Off Turns the Red and Green color channels off. Used for calibrating to color bars.Monochrome On, Off Removes all color and leaves only the Luminance data of the signal.False ColorFalse color evaluates the incoming IRE levels (exposure) of the signal and then changes the colors of the pixels to represent what those IRE levels are. This is a quick way to gauge the exposure levels within an image in a very clear way.The DP4 currently has two different types of False Color.False Color HML (High / Mid / Low)Meaning High, Medium, Low, has colors for over-exposed, under-exposed and mid-range. The scale is below:BLUE PURPLE ORANGE GREEN YELLOW False Color HL (High / Low)Meaning High, Low, has colors for over and underexposed. The remaining middle will be monochrome.Image Flip H, V, HVFlip the image horizontally,vertically, or both.Freeze On, OffWhen activated will freezethe image on-screen. Turnoff to resume normal video.1:1 MappingWhen activated, each native pixel of the input signal is mapped to a native pixel on the display. This is also called “Pixel to Pixel”.When viewing HD signals (720p and up), only a portion of the image will be displayed on the DP4 as 1:1 Mapping essentially performs a "zooming" effect on the native HD image.To move the viewable window around:When 1:1 is activated and no menu is being displayed:1 – Roll the scroll wheel to the left2 – Now roll the wheel in either direction to move the window around3 – Press button B to change the direction of movement4 – Press the back button (Button A) to exit this dialogInput MenuThe DP4 has 3 inputs to choose from:1 – HDMI2 – YPbPr (SD/HD Component)3 – Composite (SD Only)Changing inputs:1 –Navigate to the “Input” sub menu with the scroll wheel2 – Scroll to the desired input3 – Click the scroll wheel onceSystem MenuThe System Menu provides access to critical system functions, listed below:Function Range DescriptionVolume 0-100 Controls the output volume to the headphone jackVoltage Meter On, Off Displays the current operating voltage, either from batteries or line power.USB Power Off, 5V Toggles power to the USB port, on or off.Factory Reset Reverts the DP4 back to factory defaultsDisplay On, Off Disables green input indicator text on top right of screenBacklight 0-10 Default set to 5, increase/decrease backlight brightnessMisc MenuThe Miscellaneous Menu simply contains options to change the menu background opacity level, and will display the current firmware version as a reference.PIP MenuThe DP4 allows two signals (1 HD and 1 SD) to be displayed simultaneously using the PIP or POP function, located in this menu.Function Range DescriptionMulti WindowPIP, POP (Full,4:3)Determines the typeof windowed view. SizeSmall, Medium,LargeDetermines the size ofthe window. Position TL, TR, BL, BRPosition of thewindow.Border Black, Blue Border or no border. Sub Source CompositeDetermines thesecondary source. Swap Swap Swaps the two signalsAccessoriesAttaching the Acrylic Screen ProtectorThe included acrylic screen protector is recommended as a precaution, but is not required. With the screen protector in place, the DP4 is much less vulnerable to damage.The screen protector is fixed to front of the DP4 using a temporary adhesive. To apply:1 – Remove the2 protective stickers from the front and back of the screen protector, then remove the 4 small white pieces from backside corners of the acrylic screen protector to expose the adhesive.2 – Carefully line up the screen protector using the top, bottom and side edges to the front of the DP4.3 – Place the screen protector on the front, and apply a small amount of pressure at the corners. It is not necessary to press hard; the adhesive will bond more on its own over time.Attaching the SunhoodThe DP4 Sunhood uses Velcro to fix to the front of the DP4. It works by looping through the two slots on the sides of the battery plate, and then reattaching to itself.Start by feeding one side of the Velcro strap into the slot, and then pulling it tight so the edge of the sunhood is flat against the surface of the front of the DP4. Then do the other side the same way. Keep pulling each side until the tension feels right, then fold the straps back and attach the Velcro.Updating FirmwareThe DP4 has the ability to upgrade its firmware based on new software developments. This is a unique ability of SmallHD monitors, and is very easy to do. To upgrade:1 – Format your USB thumb drive to FAT file system2 – Download the .BIN file from /support3 – Copy the .BIN file to your thumb drive4 – Insert the thumb drive into the included adapter cable and plug the mini-usb cable into the mini-usb port of the DP45 – Hold down the scroll wheel and then turn the DP4 on.6 – On screen instructions will inform when the process is complete.Video Tutorial/Videos/dp4-firmware-update-how-to-guide/WarrantyThe DP4 comes with a one year limited hardwarewarranty. The limited hardware warranty covers defects in materials and workmanship of our products.Warranty specifics:∙Warranty period begins on date of shipment∙Warranty is non-transferable; products not purchased directly from SmallHD or SmallHD approved affiliates anddistributors do not qualify for warranty coverage.∙The customer shall be responsible for paying shipping charges required to return products to SmallHD forwarranty repair. SmallHD shall pay for shipping ofrepaired products to the customer.What is not covered by our warranty:∙Problems resulting from accidents, abuse, or misuse∙Problems resulting from electrical power source issues∙3rd-party servicing not authorized by SmallHD∙Failure to follow product instructions∙Water damage∙Scratches to the body or panel that occur as part of normal useFor Dead Pixel Policy and other Warranty information, visit our website at /support。
四位半数字电压表 运用电路
实际应用中,对电压的测量通常采用全量程电压表,量程从零起始至某一个数终止,例如0~1V,0~250V等。
一般测量中,被测电压在一个较大的范围变化,或被测电压是未知量,这种表是很适用的。
实际上,有时被测的电压仅仅在整个量程内一个较小的范围变化,占全量程电压表整个刻度范围很小的一部分,这时用全量程电压表不仅分辨率低,读数困难,同时精度也很低,满足不了测量要求,即便使用更高精度的表,有时也难满足测量需要。
区间式电压表取电压全量程的一个区间,起始值不是从零开始,而是根据需要选定起始值和终止值,只反映被测电压发生变化的那一部分,例如10~11V,200~230V等,这样可以展宽刻度,提高读数分辨率和测量精度,从而满足测量需要。
高精度区间式电压表大大提高测量性能,可以在电压检测、电量监控、自动控制、标准计量仪器、模/数转换等许多方面广泛应用。
1.工作原理根据被测电压变化范围和测量精度需要,适当选定电压量程的一个区间为起始值和终止值;采用运算放大器,只对选定的那一个区间进行线性放大;在运放输出端接一个标有对应区间起始值和终止值的电压表头显示被放大的测量值。
这就是高精度区间式电压表的工作原理。
图1为高精度区间式电压表电原理图。
根据被测电压Vin变化范围选定的一个区间,起始值为V1,终止值为V2,被测电压Vin在V1~V2范围内变化。
运放IC2的反向输入端用一个固定的高精度电压基准源IC1做基准,正向输入端的R1、W1、R3对被测电压进行分压,W1为调零电位器,W2为增益调整电位器,用来调整运放的放大倍数,运放输出端通过分压电阻R4接标有起始值和终止值的微安表头。
当被测电压Vin为V1 时,调整电位器W1,使运放的两个输入端等值,运放输出端表头为0V,也就是区间式电压表的起始值;当被测电压Vin为V2时,调整电位器W2,使输出端表头满刻度,也就是区间式电压表的终止值。
这样,被测电压在V1~V2之间变化时,运放输出端表头的值在起始值和终止值区间范围摆动。
PowerPad IV Model 8345 电能质量 能量分析仪、表和记录仪说明书
POWER QUALITY / ENERGY ANALYZERS,5 x voltage / 4 x current, isolatedDCConsult factory for NIST Calibration pricesPRODUCT INCLUDESCAT. # 2136.35 - POWERPAD IV MODEL 8345 (NO PROBES)CAT. # 2136.36 - POWERPAD IV MODEL 8345 (WITH (4) MINIFLEX ® MA194-24-BK FLEXIBLE CURRENT SENSORS ) Extra large tool bag, internal carrying pouch, hand strap, USB cable, (5) 10 ft black voltage leads with alligator clips, (12) color-coded input ID markers, power adapter (PA32ER) with US power cord, (2) 6 ft stackable leads, (2) 10 ft black voltage leads with alligator clips for power adapter PA32ER, (1) power plug adaptor for PA32ER, 5.8 A ·h Li-ion battery pack, quick start guide, and a USB stick with DataView ® software and user manual.AIVPOWERP D (4) MINIFLEX ® MA194-24-BK FLEXIBLE CURRENT SENSORS (WITH CAT.# 2136.36)N E WFEATURES• Full compliance with IEC 61000-4-30 ed. 3.0 Class A functions • Voltage quality diagnostics• Real-time display of color waveforms (5 voltage/4 current) from 1 cycle to 10/12 cycles• Calculation of unbalance (current and voltage)• Automatic recognition of different current sensors • Capture shockwaves up to 12 kV with a resoluton of 500 ns • Trend recording period from 200 ms to 2 h • RMS and Peak InRush for up to 30 min • Display of phasor diagrams• Waveforms at 512 samples per cycle, with Min/Max 2.5 μs • True InRush capabilities to study loads during setup• Parameterization with software for True RMS single-, two- and three-phase measurements at 512 samples/cycle, plus DC • Records and stores hundreds of parameters in memory every 10/12 periods• Measurements and recordings accessible on 7 inch color trouch screen display• True RMS voltage and current measurement• Measurements on all installation types: three-phase, Aron connection, etc.• Electrical network monitoring with setting of alarms • Fast transient events are captured and stored in memory • Communication options: Webserver, Wi-Fi, Ethernet and USB • Power W, VA and var (P , N, Q1, S and D) measurements • Measurement of energy values (total and per phase) with energy valuation• PF, DPF, CF and THD calculations and measurements • Calculation so P st & P lt flicker and sliding P st• Harmonics (amplitude/phase shift) from DC to the 63rd order • Inter-harmonic subgroups from 0 to the 62nd order • Calculations of K factor & FHL • 2 carrier current frequencies monitoredACCESSORIES/REPLACEMENTSCATALOG #2140.28 AC/DC Current Probe Model MR193-BK CATALOG #2140.32 AC Current Probe Model MN93-BK CATALOG #2140.33 AC Current Probe Model SR193-BKCATALOG #2140.34AmpFlex ® Sensor 24 in Model 193-24-BK CATALOG #2140.35AmpFlex ® Sensor 36 in Model 193-36-BK CATALOG #2140.36 AC Current Probe Model MN193-BKCATALOG #2140.48 MiniFlex ® Sensor 10 in Model MA193-10-BK CATALOG #2140.50 MiniFlex ®Sensor 14 in Model MA193-14-BK CATALOG #5100.16 Magnetic HookCATALOG #2133.76 Carrying BagCATALOG #2140.43 Lead - Set of 5, 10 ft (3M) Black Leads w/5 BlackAlligator Clips (Leads rated 600 V CAT IV 10 A, Clips rated 1000 V CAT IV 15 A, UL) CATALOG #2140.44 (1) 10 ft (3 M) Black Lead w/(1) Black Alligator Clip (Lead rated 1000 V CAT IV 15 A, Clip rated 1000 V CAT IV 15 A, UL)CATALOG #2140.46 Cable - Replacement 5 ft USB CableCATALOG #2140.80 MiniFlex ® Sensor 24 in Model MA194-24-BK CATALOG #2140.81 AC Current Probe Model MN94CATALOG #2140.82 AC/DC Current Probe Model E94CATALOG #2960.47 Battery - Replacement 5.8 A·h 61.9 W·h Li-ion Battery Pack CATALOG #5100.14 Adapter - Replacement Power Plug Adapter for PA32ER CATALOG #5100.15 Adapter - Replacement 1000 V PA32ER Power SupplyENERGY EVALUATIONSHOCKWAVES CARRIER CURRENTINTERHARMONICS(HARMONIC MODE)ALARMSTRANSIENTS TRUE INRUSH®TRENDLarge Functional DisplaysIncludes FREE DataView ® software for configuring, dataMA194-BK*100 mA to 12,000 A SR193-BK100 mA to 12,000 A *Maximum current reduced by a factor of 2 for 400 Hz fundamental frequency.All current sensors can be used with Models PEL 105, 8435 and 8436. However, only the MA196-14-BK and 196A-24-BK flexible sensors are waterproof. (1) Current range may be limited by sensor size or meter type. Consult factory for NIST Calibration pricesBattery operated24 in or 36 in sensorWaterproof, IP67 14 in or 24 in sensor10, 14 or 24 in sensorACCESSORIES/REPLACEMENTSCATALOG #2140.40BNC Adapter for AC/DC Current Probe Model SL261MN94E94All current sensors can be used with models PEL 105 and 8436. However, only the MA196-14-BK and 196 A-24-BK flexible sensors are waterproof.Consult factory for NIST Calibration pricesCATALOG #2140.77Phase Power Adapter for use with PowerPad Models 8333 & 8336CATALOG #2137.90600 V CAT III Power to Phase Adapter for use with Models PEL 102 and PEL 103 only。
DP4四位半智能电流电压表说明书
DP4四位半智能电流、电压、欧姆表使用说明书目录第一章概述-----------------------1 一概述-----------------------1二主要技术指标---------------2三型号说明-------------------3四外形及开口尺寸-------------7五端子接线-------------------8 第二章操作说明------------------9 一面板说明-------------------9二仪表的几种状态-------------11三操作说明-------------------111 上电自检-------------------112 参数设定-------------------122.1 参数设定概述----------------122.2 开锁------------------------162.3 报警------------------------162.4 小数点设定------------------172.5 调零------------------------172.6 输入量程设置----------------172.7 输入类型--------------------182.8 变送输出--------------------18 第三章功能说明---------------------19 一报警------------------------19二变送输出--------------------20第四章通讯协仪---------------------2 一通讯规程-----------------21二回答命令格式-------------21三数据形式-----------------21四通讯指令-----------------22五仪表参数代码-------------23第一章概述一概述4位半智能电流、电压、欧姆表采用当今最先进的ATMEL单片微机作主机,电流输入量程可任意设定,配合不同的互感器可满足各种测量量程的要求。
DP4交直流电电流表使用说明书(D版)
分辨力 1mV 10mV 100mV 1V 1V
输入阻抗 1.2M 12M 12M 12M 12M
互感器变比 直接输入 直接输入 直接输入 3KV/100V 10KV/100V
精度 ±0.1%F.S±3Digits ±0.1%F.S±3Digits ±0.2%F.S±3Digits ±0.2%F.S±3Digits ±0.2%F.S±3Digits
为了您的安全,在使用前请仔细阅读以下内容!
注意安全
在使用前请认真阅读说明书。 ※ 请遵守下面的要点
警告 如果不按照说明操作会发生意外。 注意 如果不按照说明操作会导致产品毁坏。
操作说明书中的符号说明如下 在特殊情况下会出现意外或危险。
警告
1.在以下情况下使用这个设备,如(核能控制、医疗设备、汽车、火车,飞机、航空、娱乐或安全装置等),需要安装安全保护 装置,或联系我们索取这方面的资料, 否则会引起严重的损失,火灾或人身伤害。
8:(48*96)
96
48
97.5
9
88.5
44.5
92
25
45
25
DP4电流/电压表使用Modbus RTU通信协议,进行RS485半双工通信,读功能号0x03,写功能号0x10,采用16位CRC校验,仪表对校验 错误不返回。
数据帧格式:
起止位 数据位 停止位 校验位
1
8
1
无
通信异常处理:
异常应答时,将功能号的最高位置1。例如:主机请求功能号是0x04,则从机返回的功能号对应项为0x84。 错误类型码: 0x01┄功能码非法:仪表不支持接收到的功能号。 0x02┄数据位置非法:主机指定的数据位置超出仪表的范围。 0X03┄数据值非法:主机发送的数据值超出仪表对应的数据范围。 CRC校验码错不返回数据。
4位高端蓝光显示直流电压表说明书
2. Connect the ground cable witrefer to the attached drawing.
3. Place the supplied charging bulb between positive terminal of the capacitor and the battery's positive terminal. Do this for 2 ~ 3 minutes or until the charging bulb goes out.
DISCHARGING THE CAPACITOR:
When you want to take out the capacitor after you finish the installation process from original car audio system. You must do discharge process when you want to move the capacitor. It will be safe to release the power of the capacitor.
DP4
DP4-DV 数显直流电压表|东崎 Toky4 位半直流电压表|DP4-PDV 数字带上下限设定直流电压公司名称: 深圳市鑫博恒业科技有限公司 发布日期: 2008-7-1 所 在 地: 东崎 TOKY 已获点击: 543 次 简单介绍: DP4-DV 数显直流电压表,东崎 Toky4 位半直流电压 表,DP4-PDV 数字带上下限设定直流电压表头,隔离变 送 4-20mA 输出可选,RS485 通讯可选,采样速度 2.5 次 /秒,供电电源为 85-265V AC/DC.点击浏览大图【详细说明】 DP4-DV 数显直流电压表|东崎 Toky4 位半直流电压表|DP4-PDV 数字带上下限设定直流电压表头 特点 图片为带设定的 DP4P 系列电压/电流量程变比,电流变比自由设定 5 位拔码设定,高、中、低限三组继电器控制输出,操作简单 具有跟踪保持功能 具有零点校准功能 隔离变送 4-20mA 输出(可选) RS485 通讯可选 采样速度 2.5 次/秒供电电源为 85-265V AC/DC 可用于电子、机械等行业生产线自动检测用DP4-DV 数显直流电压表|东崎 Toky4 位半直流电压表|DP4-PDV 数字带上下限设定直流电压表头 选型说明DP4-DV 数显直流电压表|东崎 Toky4 位半直流电压表|DP4-PDV 数字带上下限设定直流电压表头 常用型号以下为常用规格,可以根据要求特殊订做型号规格 DP4-DV20 DP4-DV200 DP4-DV600 DP4-DV3K DP4-DV10K DP4I-DV20 DP4I-DV200 DP4I-DV600 DP4I-DV3K DP4I-DV10K量程 20V 200V 600V 3KV 10KV 20V 200V 600V 3KV 10KV分辨力 1mV 10mV 100mV 1V 1V 1mV 10mV 100mV 1V 1V互感器变比 直接输入 直接输入 直接输入 3K:100V 10KV:100V 直接输入 直接输入 直接输入 3K:100V 10KV:100V测量精度 ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit ±0.2%F.S±3Digit最大允许输入 750V 750V 1000V 1000V 1000V 750V 750V 1000V 1000V 1000V注:如用户不需要带变送输出或带 RS485 通讯接口的仪表,选择没有"I“和_T_的型号即可。
四位半数字电压表(长春大学王实老师版)
┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊214数字电压表[摘要]214数字电压表是以ICL7135芯片为核心,辅以74LS74、74HC04、ICM7556等芯片设计而成的。
主要由测量部分、显示部分、脉冲部分、供电部分四个部分组成。
测量部分是通过4位半双积分式A/D转换器ICL7135芯片实现。
ICL7135对模拟电压进行A/D转换,输出BCD码,并自动输出极性判断信号,同时ICL7135用动态扫描传送数据使数码管亮灭的时间间隔短,保证了测量结果的稳定显示。
74LS47和共阳数码管是显示部分,74LS74译码器接收ICL135的BCD码译码成控制信号去点亮数码管,从而显示出所测的模拟电压值。
用ICM7556配上合适的电阻电容组成多谐振荡器作为脉冲部分产生标准的137KHz频率提供ICL7135工作时针信号。
外接+5V和74HC04产生的-5V是供电部分给整个电路供电。
整个设计利用反相器与555结合产生-5V给ICL7135供电降低了电路的供电要求。
选用ICL7135使显示变得简单而又稳定。
[关键词]ICL7135 74LS47 ICM7556┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊142DIGITAL VOLTMETER[Abstract]142digital voltmeter based on ICL7135 chip as the core,supplemented with 74LS74, 74HC04, ICM7556 and other chips designed.Is mainly composed of measuring part, display part, pulse part, part of the power supply.Measuringt part is through four half A/D converter ICL7135 chip. ICL7135 to simulate A/D conversion voltage output, and automatic BCD output signal, and ICL7135 polarity judgment with dynamic scanning GuanLiang digital data transmission to destroy the time interval is short, guarantee the stability of measurement results. 74LS47 and Yang digital display 74LS74 part, is receiving the decoder ICL135 BCD decoding into the control signal to light, which showed that the simulation test voltage values.ICM7556 with matching appropriate resistance composed many harmonic oscillator as capacitance have standard 137KHz pulse frequency signal. ICL7135 provide working hour External + 5V and 74HC04 produces - for the part is 5V circuit power supply. The whole design using inverter and combined to produce 555-5V circuit ICL7135 power supply decreased. ICL7135 choose to display become simple and stable.[Key words]74LS47 ICL7135 ICM7556┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊目录第1章绪论 (1)1.1 数字电压表 (1)1.1.1 数字电压表的特点 (1)1.2 主要任务 (3)1.3 设计内容及要求 (3)1.4 设计目的 (4)第2章数字电压表基本组成原理 (5)2.1 数字电压表基本原理及系统框图 (5)2.2 LED及四位半A/D转换器ICL7135的功能简介 (6)2.2.1 四位半A/D转换器ICL7135的功能简介 (6)2.2.2 ICL7135的原理 (6)2.2.3 ICL7135主要特点 (6)2.2.4 ICL7135的管脚说明 (7)2.3 ICM7556管脚说明 (9)2.4 74HC04功能简介 (10)2.4.1 74HC04管脚说明 (10)2.5 74LS47译码器简介 (11)2.5.1 74LS47的管脚分布和说明 (11)2.5.2 74LS47原理 (11)2.6并行BCD码的输出 (12)2.7输入滤波电路及负电源组成原理............................... 错误!未定义书签。
DP4 电流电压表 欧姆表说明书
001.DP4电流电压表欧姆表使用说明书V1.02.1、主要特点²友好的人机界面,易学易用,操作快捷。
²采用开关电源适应85V-240VAC范围或者24VDC电源供电。
²模块化结构,灵活配置,方便升级。
²采用贴片技术(SMT),设计更加简洁、轻巧。
²支持多种输入类型,现场配置灵活方便。
²热电偶、热电阻输入采用非线性修正,测量精度高,稳定性好。
2.2、技术指标●输入规格:交流电压,交流电流.直流电压,直流电流扩充规格:在保留上述输入规格基础上,允许用户指定一种额外输入规格(非线性输入可能需要提供分度表)●测量精度:0.2级●响应时间:≤0.5秒(设置数字滤波参数FiL=0时)●输出规格(模块化):继电器触点开关输出:220VAC/3A、220VAC/0.8A可控硅无触点开关输出:100-240VAC/0.2A(持续),2A(20mS瞬时,重复周期大于5S)SSR电压输出:12VDC/30mA (用于驱动SSR固态继电器)可控硅触发输出:可触发5-500A的双向可控硅、2个单向可控硅反并联连接或可控硅功率模块线性电流输出:0-10mA或4-20mA 可定义●报警功能:上限、上上限、下限、下下限、正偏差、负偏差等6种方式,最多可输出3路●电源:85-240VAC,-15%,+10% / 50-60Hz;或24VDC/AC,-15%,+10%●电源消耗:≤5W●环境温度:0-50℃●环境湿度:<85%RH2.3、型号定义仪表的型号定义如下:一:型号及含义DP 4—□□—□变送:缺省:无;V1:0-5V;V2:1-5V;A1:0-20mA;A2:4-20mA量程代号DV:直流电压;DA:直流电流;A V:交流电压;AA:交流电流R 欧姆表电流电压表欧姆表2.4、模块说明R1A 继电器常开(压敏电阻吸收)输出模块(容量:30VDC/0.8A ,220VAC/0.8A ) R1B 继电器常闭触点开关(压敏电阻吸收)输出模块(容量:30VDC/0.8A ,220VAC/0.8A ) R1C 继电器常开+常闭触点开关(压敏电阻吸收)输出模块(容量:30VDC/0.8A ,220VAC/0.8A ) R2A 大容量继电器常开触点开关(阻容吸收)输出模块(容量:30VDC/3A ,220VAC/3A ) R2B 大容量继电器常闭触点开关(阻容吸收)输出模块(容量:30VDC/3A ,220VAC/3A ) R2C 大容量继电器常开+常闭触点开关(阻容吸收)输出模块(容量:30VDC/3A ,220VAC/3A ) W 1可控硅无触点输出模块(容量:100-240VAC/0.2A ) G 固态继电器驱动电压输出模块(DC 12V/50mA 输出)K1单路可控硅过零触发输出模块(每路可触发5-500A 双向或二个反并联的单向可控硅) K2双路可控硅过零触发输出模块(每路可触发5-500A 双向或二个反并联的单向可控硅) I1光电隔离的可编程线性电流输出模块 S1 光电隔离RS485通讯接口模块 S2 光电隔离RS232通讯接口模块U1/U2/U3 隔离的5V/12V/24V 直流电压输出,可供外部变送器等传感器或其它电路使用,最大电流50mA例1、有一台仪表的型号是:DP4-AA500-R1C-R1A-I1-N-N-AC ,则它的配置如下:主机型号:DP4-AA500,交流500V 电流表 面板尺寸:96×96 mm报警输出:继电器常开+常闭触点开关输出模块 辅助输出1:继电器常开输出模块辅助输出2:光电隔离的可编程线性电流输出模块 辅助输出3:无 输入:温度 电源:85-240VAC二:直流电压表型号量程 分辨力 精度DP4-DV0.2 200mV 100uV ±0.2%F.S ±2Digit DP4-DV2 2V 1mV ±0.2%F.S ±2Digit DP4-DV20 20V 10mV ±0.2%F.S ±2Digit DP4-DV200 200V 100mV ±0.2%F.S ±2Digit DP4-DV600600V1V±1%F.S ±2Digit三:直流电流表型号量程 分辨力 分流器变比 精度DP4-DA0.0002200uA100nA直接输入±0.2%F.S ±2Digit辅助输出2:光电隔离的可编程线性电流输出模块 辅助输出3:无 输入:温度 电源:85-240VAC主机型号:DP4-AA500,交流500V 电流表面板尺寸:96×96 mm报警输出:继电器常开+常闭触点开关输出模块辅助输出1:继电器常开输出模块DP4-DA0.002 2mA 1uA 直接输入 ±0.2%F.S ±2Digit DP4-DA0.02 20mA 10uA 直接输入±0.2%F.S ±2Digit DP4-DA0.2 200mA 100uA 直接输入 ±0.2%F.S ±2Digit DP4-DA2 2A 1mA 直接输入 ±0.2%F.S ±2Digit DP4-DA20 20A 10mA 20A/75mV ±0.2%F.S ±2Digit DP4-DA30 30A 100mA 30A/75mV ±1%F.S ±2Digit DP4-DA50 50A 100mA 50A/75mV ±1%F.S ±2Digit DP4-DA100 100A 100mA 100A/75mV ±0.2%F.S ±2Digit DP4-DA150 150A 100mA 150A/75mV ±0.2%F.S ±2Digit DP4-DA200 200A 100mA 200A/75mV ±0.2%F.S ±2Digit DP4-DA300 300A 1A 300A/75mV ±1%F.S ±2Digit DP4-DA500 500A 1A 500A/75mV ±1%F.S ±2Digit DP4-DA1000 1000A 1A 1000A/75mV ±0.2%F.S ±2Digit DP4-DA1500 1500A 1A 1500A/75mV ±0.2%F.S ±2Digit DP4-DA2000 2000A 1A 2000A/75mV ±0.2%F.S ±2Digit 四:交流电压表型号 量程 分辨力 电压互感器变比 精度 DP4-AV200 200mV 100uV 直接输入±0.2%F.S ±2Digit DP4-AV2 2V 1mV 直接输入 ±0.2%F.S ±2Digit DP4-AV20 20V 10mV 直接输入±0.2%F.S ±2Digit DP4-AV200 200V 100mV 直接输入 ±0.2%F.S ±2Digit DP4-AV600 600V 1V 直接输入 ±0.2%F.S ±2Digit DP4-AV3K 3KV 10V 3KV/100V ±0.2%F.S ±2Digit DP4-AV10K 10KV 10V 10KV/100V ±0.2%F.S ±2Digit五:交流电流表型号 量程 分辨力 电压互感器变比 精度 DP4-AA0.2 200mA 100uA 直接输入±0.2%F.S ±2Digit DP4-AA5 5A 2mA 直接输入 ±0.2%F.S ±2Digit DP4-AA20 20A 10mA 20A/5A ±0.2%F.S ±2Digit DP4-AA50 50A 100mA 50A/5A ±1%F.S ±2Digit DP4-AA100 100A 100mA 100A/5A ±0.2%F.S ±2Digit DP4-AA150 150A 100mA 150A/5A ±0.2%F.S ±2Digit DP4-AA200 200A 100mA 200A/5A ±0.2%F.S ±2Digit DP4-AA500 500A 1A 500A/5A ±1%F.S ±2Digit DP4-AA1000 1000A 1A 1000A/5A ±0.2%F.S ±2Digit DP4-AA1500 1500A 1A 1500A/5A ±0.2%F.S ±2Digit DP4-AA2000 2000A 1A 2000A/5A ±0.2%F.S ±2Digit 六:欧姆表R0.020.01ΩR100100ΩR0.2 0.1ΩR1000 1000ΩR2 1ΩR20002000ΩR20 10ΩR40004000ΩR50 100ΩR8000 8000Ω说明:1:测量精度测试环境条件为:温度20±2℃相对湿度45-75%。
智能数显电压表说明书
1、概述UCH系列智能数显电压表使用说明3、技术规格显示范围:(直流)/(交流)小数点位置可设定测量精度:0.%+d报警输出:2路继电器输出,触点容量220V AC 5A 变送输出: ,0mA 20mA直流电流输出,通过设定选择。
负载能力小于600Ω 输出分辨力:1/4000,误差小于±0.3% FS -1999~99990~99994mA~20mA ~85(交流)、0.5%+d(直流) 响应频率:(仅对交流)/ 光电隔离 1V 5V,0V 5V,0V 10V直流电压输出,需订货时注明 变送输出为选项功能,只有订购选择后,仪表才具有此功能 工作电源:AC,功耗小于3VA(24VDC供电的仪表, 订货时需说明)工作环境:0℃50℃,湿度低于90%R.H 545~400Hz ~~~85~265V ~★万能型输入,输入代码选择测量信号类型、量程数字滤波功能;零值、满值、小数点可自由设定上、下限报警继电器输出变送输出,能将测量、变换后的显示值以标准电流、电压形式输出供其它设备使用4、输入信号代码选择5、菜单参数设置方法设值增加值减小键报警继电器(AL1)报警类型限报警,---L:下限报警 第一报警继电器(AL1)报警值AL1进入菜单设定增加闪烁位数字移动闪烁位小进入菜单设定增加闪烁位数字移动闪烁位小 HY1第一报警继电器(AL1)回差值进入菜单设定增加闪烁位数字移动闪烁位小报警继电器(AL2)报警类型进入菜单设定增加闪烁位数字移动闪烁位小出参数设置,返回测量显示 在选择好相应的输入信号后,需根据实际量程设置SLL、SLH、 DP这三个参数。
例:测量AC220V,设置 (AC600V档),然后设置,=.,=.IN =DP ooo o =.SLL 0000SLH 60001.31.41.21.13.13.23.33.43.53.5.23.5.13.5.33.5.43.63.74.1-1-1A 报警继电器(AL2)报警值进入菜单设定增加闪烁位数字移动闪烁位小报警继电器(AL2)回差值进入菜单设定增加闪烁位数字移动闪烁位小5.2 报警输出5.2.1 每个报警点有3个参数,分别用于设定报警值,选择报警方式 和设定报警回差值。
四位半数字电压表设计
214位数字电压表[摘要] 随着电子科学技术、传感技术、自动控制技术和计算机的发展,电阻、电压、电流等数值的测量变得越来越常见,其中电压的测量最为常见。
传统的指针式电压表应经无法满足如今高精度的要求,数字电压表的诞生很好地解决了这一问题。
数字电压表(Digital Voltmeter)简称DVM,它是采用数字化测量技术,把连续的模拟量(直流输入电压)转换成不连续、离散的数字形式并加以显示的仪表。
且数字电压表精度高,抗干扰能力强,可扩展性强,集成方便,读数方便。
目前由各种A/D 转换器构成的数字电压表,已被广泛应用于电子及电工测量,工业自动化仪表,自动测试系统等智能化测试领域,显示出强大的生命力。
与此同时,由DVM 扩展而成的各种通用及专用数字仪器仪表,也把电量及非电量测量技术提高到站新水平。
综上所述,数字电压表在现在及将来都会有广大的应用。
[关键词]:电压测量 数字电压 数码管[关键字]: 译码器 ICL7135214位数字电压表的英文[Abstract] Four in digital design a form[Summary] As the voltage the table design the electronic science and technology, and sensing technology, automatic control technology and computer technology development, an electronic survey become the workers must acquire the means of electronics, precision measurement and functional requirements are higher and higher monolithic integrated circuits as computer technology have a wide application in industry, intellectualized instruments, household appliances and electronic toys and other areas. this article introduced a monolithic integrated circuits 89s52 the numbers measure the voltage electrical circuit used icl7135 high precision, two points a d transforming circuit, a direct measurement range of 0 - ± 2000 and lcd1601 use lcd modules, and in the pc to the serial communication.[Keywords] voltage measurement displayed目录1 绪论 (4)1.1国内外数字电子发展概况 (4)1.2 主要任务 (6)1.3设计内容及要求 (6)1.4设计目的 (6)2 数字电压表基本组成原理及电路设计 (6)2.1.1 数字电压表基本原理及系统框图 (6)3数字电压表的硬件设计 (7)3.1四位半A/D转换器ICL7135的功能简介 (7)3.1.1 ICL7135的原理 (8)3.1.2 7135主要特点 (8)3.1.3 ICL7135的管脚说明 (9)3.2 ICM7556的管脚说明 (11)3.3 74HC04功能简介 (12)3.4 74LS47译码器简介 (13)3.4.1 74LS47的管脚分布和说明 (14)3.4.2 74LS47原理 (15)3.5并行BCD码的输出 (15)3.6输入滤波电路及负电源组成原理 (16)4调试要点及测试方法 (17)5致谢 (18)6参考文献 (19)附录 (20)1.绪论1.1国内外数字电子发展概况数字技术是当前发展最快的学科之一,数字逻辑器件已从60年代的小规模集成电路(SSI)发展到目前的中、大规模集成电路(MSI、LSI)及超大规模集成电(VLSI)。
4位半数字电压表设计
4位半数字电压表设计摘要随着电子科学技术、传感技术、自动控制技术和计算机技术的发展,电子测量成为广大电子工作者必须掌握的手段,对测量的精度和功能的要求也越来越高,单片机技术作为计算机技术的一个分支广泛应用于工业控制、智能化仪器仪表、家用电器,甚至电子玩具等各个领域。
本文介绍一种以89S52单片机为核心的数字电压测量电路,该电路采用ICL7135高精度、双积分A/D转换电路,测量范围直流0-〒2000伏,使用LCD1601液晶模块显示,并可以与PC机进行串行通信。
该电路设计新颖、功能强大、可扩展性强。
关键词:电压测量,ICL7135,双积分A/D转换器,数码管显示指导老师签名:第1章前言1第2章系统的原理及框图 4第3章电路设计 63.1 输入电路 63.2 A/D 转换电路 63.2.1 双积A/D 转换器的工作原理 73.2.2 7135的应用3.2.2 7135的应用8 3.3.1 BCD码七段译码驱动器103.4.1 555的结构原理123.4.2 555组成多谐振荡电路13结束语 15参考文献17致谢18附录错误!未定义书签。
附录A数字电压表原理图19附录B 数字电压表PCB图20第1章前言在电量的测量中,电压、电流和频率是最基本的三个被测量,其中电压量的测量最为经常。
而且随着电子技术的发展,更是经常需要测量高精度的电压,所以数字电压表就成为一种必不可少的测量仪器。
数字电压表(Digital V oltmeter)简称DVM,它是采用数字化测量技术,把连续的模拟量(直流输入电压)转换成不连续、离散的数字形式并加以显示的仪表。
传统的指针式电压表功能单一、精度低,不能满足数字化时代的需求,采用数字电压表,由精度高、抗干扰能力强,可扩展性强、集成方便。
目前,由各种单片A/D 转换器构成的数字电压表,已被广泛用于电子及电工测量、工业自动化仪表、自动测试系统等智能化测量领域,示出强大的生命力。
与此同时,由DVM 扩展而成的各种通用及专用数字仪器仪表,也把电量及非电量测量技术提高到崭新水平。
4位半数字电压表
一绪论国内外数字电子进展概况数字技术是当前进展最快的学科之一,数字逻辑器件已从60年代的小规模集成电路(SSI)进展到目前的中、大规模集成电路(MSI、LSI)及超大规模集成电(VLSI)。
相应地,数字逻辑电路的设计方式在不断地演变和进展,由原先的单一的硬件逻辑设计进展成三个分支,即硬件逻辑设计(中、小规模集成器件)、软件逻辑设计(软件组装的LSI和VSI,如微处置器、单片机等)及兼有二者优势的专用集成电路(ASIC)设计。
在电量的测量中,电压,电流和频率是最大体的三个被测量,其中电压量的测量最为常常。
而且随着电子技术的进展,更是常常需要测量高精度的电压,因此数字电压表成为一种必不可少的测量仪器。
而且,有各类单片A/D转换器组成的数字电压表,已被普遍应用于电子及电工测量,工业自动化仪表,自动测试系统等智能化测量领域,示出壮大的生命力。
与此同时,由DVM扩展而成的各类通用及专业数字仪器仪表,也把电量及非电量测量技术提高到崭新水平。
目前数字电子技术已经普遍地应用于运算机,自动操纵,电子测量仪表,电视,雷达,通信等各个领域。
例如在现代测量技术中,数字测量仪表不仅比模拟测量仪表精度高,功能高,而且容易实现测量的自动化和智能化。
随着集成技术的进展,尤其是中,大规模和超大规模集成电路的进展,数字电子技术的应用范围将会更普遍地渗透到国民经济的各个部门,并将产生愈来愈深刻的阻碍。
电子技术专门是数字电子技术进展迅速,大大推动了信息技术的进展,电子技术的新理论、新器件、新技术不断显现,对咱们学生的能力提出更高的要求。
随着电子科学技术的飞速进展,技术的进展对科学技术、国民经济和国防各领域的日趋深切的阻碍和渗透。
单纯从技术开发能力来讲,国内与国外差距并非大。
从事手持设备应用系统开发的有关专家以为,中国的工科学生即便是一般大学的毕业生在技术素养上也不比国外同行差,所欠缺的只是实践体会,只要略加培训即可。
但同时也指出,由于中国制造商推出的产品技术含量低,价钱低,因此利润很薄,结果就没有更多力量弄开发,于是又加倍无法提高技术含量,要想进展就必需第一冲破这一怪圈。
4~20mA环供电4位半LCD显示表
4~20mA环供电4位半LCD显示表DATEL 公司的DMS-40LCD-4/20S 是一种适用于4~20mA 过程监控应用的4 位半LCD(液晶显示)显示表。
它具有很低(2.9V)的环路压降、190Ω(最大)环路阻抗。
用DIP 开关选择量程、补偿和小数点,可有几百个不同的输入/读出组合。
它具有两个互不影响的增益(量程)和零调整20 匝电位器。
整个表的大小为2.17×0.92×0.90(55mm×23mm×23mm),显示为大的、0.04(10.0mm)高、太阳光下可视的LCD。
DMS-40LCD-4/20S 框图示于图1,典型的应用连接示于图2。
显示读数与DIP 开关设置的关系列于表1 中。
S1 的6 个开关位置和S2 的2 个开关位置设置显示读数。
例如,希望显示读数为:4mA=000020mA=10000用DIP 开关设置#13(即S1 开关的SW1、SW2、SW3、SW6 以及S2 和SW1 和SW2 设置为On 位置,S1 的SW4 和SW5 设置为Off 位置)。
在设置好S1 和S2 的位置后应重表定标,即加4mA 一起确保长期稳定性和精度。
此表在其标定的工作温度范围内的零读数稳定受下面三项漂移的影响:跨接在表补偿电路上的电压漂移,跨接在表的输入电阻器(4mA 输入)上的电压漂移以及所加4mA 输入信号本身的稳定度。
在较低的DIP 开关设置中(#1~4量程),表的寄生腐蚀和开关阻抗也贡献小的误差电压。
表的增益电路和环路输入电子器的漂移会影响标定温度范围内量程稳定度。
为了使这些漂移最小,表应在预计的工作温度上定标。
表1 DIP 开关设置Switch S1 Switch S2 Dispfay Reading SW1 SW2 SW3 SW4 SW5 SW6 SW1 SW2 4mA20mA100002250-。
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DP4四位半智能电流、电压、欧姆表使用说明书目录第一章概述-----------------------1 一概述-----------------------1二主要技术指标---------------2三型号说明-------------------3四外形及开口尺寸-------------7五端子接线-------------------8 第二章操作说明------------------9 一面板说明-------------------9二仪表的几种状态-------------11三操作说明-------------------111 上电自检-------------------112 参数设定-------------------122.1 参数设定概述----------------122.2 开锁------------------------162.3 报警------------------------162.4 小数点设定------------------172.5 调零------------------------172.6 输入量程设置----------------172.7 输入类型--------------------182.8 变送输出--------------------18 第三章功能说明---------------------19 一报警------------------------19二变送输出--------------------20第四章通讯协仪---------------------2 一通讯规程-----------------21二回答命令格式-------------21三数据形式-----------------21四通讯指令-----------------22五仪表参数代码-------------23第一章概述一概述4位半智能电流、电压、欧姆表采用当今最先进的ATMEL单片微机作主机,电流输入量程可任意设定,配合不同的互感器可满足各种测量量程的要求。
仪表可带上限、下限报警输出,可带0-10mA或4-20mA标准电流变送输出,并且采用模块化结构,用户可根据需要增减输出功能。
仪表的测量量程、上限报警值、下限报警值、变送输出范围、变送输出值可任意设定。
4位半智能电流、电压、欧姆表可带RS485或RS232通讯接口,可与上位机通讯。
主要特点:◆采用当今最先进的ATMEL单片微机作主机,减少了外围部件,提高了可靠性。
◆输出接口采用模块化结构,功能配置方便灵活。
◆采用WATCHDOG电路、软件陷阱与冗余、掉电保护、数字滤波等技术,注重现场容错能力,使整机具有很强的抗干扰能力。
◆采用双四位半LED数码显示,可同时显示测量值与第一路报警设定值。
-1-二主要技术指标:基本误差:0.2% F.S±1个字显示:双四位半LED数码管显示输入信号:交流电流交流电压直流电流直流电压电阻超量程显示:Sb控制方式: 二路报警可任意设为上限或下限输出信号: 继电器输出触点容量AC220V/0.8A继电器输出触点容量AC220V/3A电流变送输出0-10mA、4-20mA 电源:开关电源85V-265V功耗:4W环境温度:(0-50)℃-2-环境湿度:<85%RH面板尺寸:96mm ×48mm(横式)三 型号说明DP4- □□ □ □ □□AV :交流电压 DV :直流电压 AA :交流电流 DA :直流电流 R : 欧姆量程代号注:量程单位为:V 、A 、K Ω 第一路报警(上限报警) N :无报警J1:AC220V/3AJ2:AC220V/0.8ADP4- □□ □□ □ □ □ 第二路报警(下限报警)N :无报警J1:AC220V/3A J2:AC220V/0.8A 电流变送输出 N :无I2:0-10mA 或4-20mA 输出 通讯接口 N :无 R :RS232 S :RS485-3--4--6-外形尺寸(宽×高×深 mm)开口尺寸(宽×高×深 mm)96×48×四外形及开口尺寸-7-五第二章操作说明一面板说明① PAR键:a 在设定状态时,用于存储参数的新设定值并选择下一个设定参数。
b 当按键时间超过3秒时,用于正常状态与设定状态之间的切换。
正常状态PAR(>3秒)设定状态PAR设定下一个参数-9-②键:在设定状态时,用于左移设定的位,顺序如下:千位←百位←十位←个位③④▲(▼)键:在设定状态时,用于增(减)设定值,顺序如下←→0←→1←……→9←→-←→:⑤上显示窗:在正常状态下,显示测量值。
在设定状态下,显示被设定参数的符号。
⑥下显示窗:在正常状态下,显示第一路报警设定值。
在设定状态下,显示被设定参数的设定值。
-10⑦ ALM1(第一路报警)指示灯:满足第一路报警条件时,ALM1指示灯亮,同时第一路(3、4端)报警输出闭合;反之,则ALM1输出指示灯暗,第一路报警输出断开。
⑧ ALM2第二路报警指示灯:满足第二路报警条件时,ALM2指示灯亮,同时第二路报警(5、6端)输出闭合;反之,则ALM2输出指示灯暗,第二路报警输出断开。
二仪表的几种状态:正常状态:仪表正常工作时的状态,上显示窗显示测量值,下显示窗显示第一路报警设定值。
设定状态:仪表处于各种参数设定的状态,上显示窗显示设定参数,下显示窗显示参数的设定值。
三操作说明:1上电自检(1)按仪表的端子接线图连接好仪表的电源(1、2端)、输入、输出、报警等接线。
(2)仔细检查仪表的接线,正确无误后方可打开电源。
(3)仪表接通电源后,立即进入自检状态。
上显示窗显示测量值,下显示窗显示第一路报警设定值。
若仪表出现故障,则上显示窗显示“SYS”,下显示窗显示“Err”。
仪表通电后预热15分钟。
-112参数设定2.1参数设定概述在正常状态下,按PAR键并保持3秒即进入参数设定。
在设定状态下,按一下PAP键为修改下一个参数;按PAR键并保持3秒则转到正常状态。
具体如表一。
注:参数表中带*号无定义。
-14-例:设定HiL 参数200.0,原设定值100.0:-15-2.2 开锁修改参数设定值,必须先把Loc 参数设定为oN 。
Loc 设定为oFF 时,参数设定值禁止修改,只能浏览。
2.3 报警仪表具有二限报警输出,报警输出可由报警方式参数(HL1、HL2)设定为上限或下限。
如要设定为上限报警,只须把HL1参数设定为oN 。
例:仪表使用第一路报警并设为上限报警,超过200.0时报警输出闭合,原设定值为1500.0。
-16-2.4 小数点设定Poin 参数用来确定显示的小数点位置,修改小数点不影响测量精度。
修改小数点可以以一种单位显示出直观的读数。
2.5 调零当仪表显示值与实际值有误差时,可通过oSEt 参数来校正。
例如,当实际被测量值0时,仪表测量显示为2,则可把oSEt 参数设为-2。
那么,校正后仪表显示结果为0,与实际值相符合。
2.6 输入量程设置参数“LoL ”与“HiL ”设置将直接影响显示值与实际值关系,“LoL ”对应量程下限,“HiL ”对应量程上限;当用互感器测量时,“HiL”为互感器的变比。
-17-例1:有一测量交流电流的电路中使用了互感器变比为300:5,则参数设置如下Poin=---.-Sn=14LoL=0.0HiL=300.0此例子说明,对于使用互感器时,该仪表量程由互感器决定。
2.7 输入类型输入类型参数Sn的设定范围如表一所示,出厂已设好。
2.8 变送输出仪表的变送输出可任意设定为0-10mA或4-20mA,变送范围可任意设定。
例如测量量程为600V交流电压,变送范围设为100V-300V,参数设定如下:LoL=0HiL=600oPL=100oPH=300oP=4-20则当测量值为≥300V时,仪表变送输出为20mA;当测量值为200V时,仪表变送输出为12mA。
-18-第三章功能说明一报警1 当测量值低于下限报警值时,指示灯亮,且报警触点闭合。
2 当测量值高于上限报警值时,指示灯亮,且报警触点闭合。
为避免测量值在报警临界点波动时报警输出频繁动作,仪表使用了Hy报警回差参数。
当测量值上升达到OUT1+Hy的值时,仪表上限报警输出;当测量值下降到 OUT1值时仪表未停止报警,只有在测量值低于OUT1-Hy时,仪表才停止报警,如图一。
当测量值下降到OUT1-Hy时,仪表下限报警输出,当测量值上升到OUT1+Hy时,下限报警停止,如图二。
二变送输出仪表可把测量值变送输出为0-10mA或4-20mA标准电流,输出电流形式由“oP”参数确定,测量值变送范围由“oPL”及“oPH”参数确定,其单位与“HiL”一样。
有一仪表输入为交流电压输入时,变送输出即为输入信号的转换输出,如仪表输入为0-600VAC(Sn=14),变送输出范围可由“oPL”及“oPH”任意设定,例如:“oPL”=“100”,“oPH”=“300”,“oP”=“4-20”,则当测量值为≤100时,仪表输出4mA,测量值为≥300时,仪表输出20mA。
-20-第四章通讯协议一通讯规程4位半智能电流、电压、欧姆表采用串行异步通讯,有RS-232C、RS422A或RS485通讯接口, 波特率1200--9600, 四档可任意选择。
1个起始位(第0位), 8个数据位(第1-8位), 1个寻址/数据判别位(第9位),1个停止位,共11位,数据采用16进制。
二回答命令的格式在每一通讯指令中,仪表最后返回信息:4FH 4BH (OK) 表示通讯成功3FH 3FH (??) 表示通讯失败三数据形式1 数据采用两字节的补码表示2 具有特定取值范围的参数2.1 MV为电流变送输出值,范围为0-200。
MV=0表示电流变送输出为0mA,MV=200表示电流变送输出20mA,2.2 ,具体如下:"1"表示"oN"。
"0"表示"oFF"。
3.3 oP变送输出方式, 取值为2或3, 2表示0-10mA,3表示4-20mA。
3.5 bAud波特率,范围为0-3,依次表示1200、2400、4800、9600。
Hy、Sn、FiL、oPL、oPH、、oP、Addr、bAud及状态标志为单字节参数,写入时应以"0"填充其高字节。
四通讯指令1 寻址指令当上位机要对某仪表进行通讯操作时,应先对其发寻址指令。
寻址指令为单字节指令,第1-8位为地址, 第9位为"1"(非寻址指令为"0"),仪表的地址由Addr参数确定。