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Capacitance materiallevel meter

Capacitance materiallevel meter is suitable for industrial production in the process of storage tank…

Description：

、產(chǎn)品概述：">

、產(chǎn)品概述：">Productoverview:

ZW-LT700 series Capacitance materiallevel meter

，可變電容由壓力腔上的膜片和固定在其上的絕緣電極所組成

，當(dāng)感受到壓力變化時(shí)，膜片要產(chǎn)生微微的翹曲變形

，從而改變了兩極的間距

，采用******的檢測(cè)電路測(cè)電容的微小變化，并進(jìn)行線性處理和溫度補(bǔ)償

。">The variable capacitor form has the advantages of simple structure, durable and very stable, variable capacitor is composed of diaphragm pressure cavity and fixed on the insulated electrode, when feeling the pressure changes, the diaphragm to deform slightly, thus changing the pole spacing, by small changes in measuring capacitance by unique detection circuit the linear processing and temperature compensation and. 。">DC voltage or current sensor output signal and the measured pressure is proportional to the.

Two, work principle:

，液體包圍探極線的面積隨之改變

，導(dǎo)致電容的變化，微處理器采集電容信號(hào)

，處理并顯示輸出

。">ZW-LT700 series <strong> capacitance materiallevel meter</strong> is due to the change of liquid level of liquid, surrounded by the probe line area change, lead to changes in capacitance, capacitance signal processing and microprocessor acquisition, display and output. ，導(dǎo)電液體為電容的另一極

，中間為高穩(wěn)定性的聚四氟乙烯。">The principle of capacitance method for liquid level measuring probe line and the conductive liquid constitute a capacitor, wherein the probe wire core for capacitor pole, the conductive liquid for another pole of the capacitor, the middle high stability of ptfe.

，導(dǎo)致電容的變化

，根據(jù)同心筒狀電容的公式可寫(xiě)出液體高度與是容的關(guān)系：">With the change of liquid level of liquid, surrounded by the probe line area change, cause the capacitance changes according to the concentric cylindrical capacitance formula can be written and is the relationship between the height of liquid:

C=Co 2 pi epsilon /LogD/d*h type:

Co: distributed capacitance

E: PTFE dielectric constant

D: probe diameter

、ε、D/d為固定常數(shù)

，所以C=kh,即電容量只與液體浸沒(méi)探極的高度成正比

。">H: a liquid immersion probe for height, Co, e, D/d as a constant, so that the electric capacity of C=kh, only with a liquid immersion probe is proportional to the height of the pole.

Three, application:

、遠(yuǎn)傳至操作控制室

，供二次儀表或計(jì)算機(jī)裝置進(jìn)行集中顯示、報(bào)警或自動(dòng)控制

。">ZW-LT700 series <strong> capacitance materiallevel meter</strong> can be of various liquid parameters is converted to a standard current signal and sent to the control room, for secondary instrument or computer system of display, alarm or automatic control. ，適用于冶金

、化工、環(huán)保

、電站

、造紙、制藥

、印染

、食品、市政等行業(yè)的液位

、料位

、油水界面、泡沫界面的連續(xù)監(jiān)測(cè)

。">The good structure and installation, suitable for metallurgy, chemical industry, environmental protection, power, papermaking, printing and dyeing, pharmaceutical, food, municipal and other sectors of the liquid level, oil-water interface and foam interface of continuous monitoring. 。">This is not suitable for viscous liquid level measuring instrument in medium viscosity is greater than 125mm2/s.

Four, main features:

、多種信號(hào)輸出形式

，方便不同系統(tǒng)配置；">1, a variety of signal output form, convenient for different system configuration;

、聚四氟乙烯探極

，耐酸、堿等強(qiáng)腐蝕性液體（除金屬鈉以外）及高溫

；">2, PTFE probe, acid, alkali and other strong corrosive liquids (except sodium outside) and high temperature;

、測(cè)量部分，只有一條四氟軟線或四氟棒探極作為傳感器

，可靠性高

；">3, the measurement part, only a PTFE or PTFE cord rod probe as a sensor, high reliability;

、高壓場(chǎng)合且測(cè)量值不受被測(cè)液體的溫度

、比重及容器的形狀、壓力的影響

；">4, can be used for high temperature and high pressure situations and the measured value is not affected by the temperature of the fluid to be measured, the proportion and the shape of the container, the influence of pressure;

、二線制LED現(xiàn)場(chǎng)顯示，無(wú)須電源

，******解決了LCD在黑暗環(huán)境中無(wú)法顯示的問(wèn)題；">5, two-wire LED scene display, without power, completely solve the LCD cannot be displayed in the dark environment problems;

、完善的過(guò)流

、過(guò)壓、電源極性保護(hù)

。">6, perfect overcurrent and overvoltage protection and power supply polarity protection.

、技術(shù)參數(shù)：">Five, technical parameters:

Measuring range: 0.2-20 meters;

Accuracy: + 0.5% + 1%;

；">Probe temperature: -40~+250 degrees;

；">The transmitter to adapt to the environment temperature: -40~+60 degrees;

Allow the pressure: -0.1MPa~2.5MPa;

、堿

、水等非結(jié)晶導(dǎo)電液體；">Medium: conductivity is not the end of the 10-3S/m of acid and alkali, water and other non conducting liquid crystal;

；">Power supply voltage: DC12-35V (isolated DC21-27V);

；">The non isolated line, three line: 20mA;

Three wire ends of isolation: <32mA;

；">Three terminal four line: <35mA;

；">Output signal: 4-20mA (0-10mA, 0-20mA);

Output protection: 27mA;

、輸出

、電源之間隔離耐壓：1000V；">Voltage isolation between the measurement and the output power: 1000V;

；">Range adjustment range and zero migration: = + 30%FS;

。">The transmitter body size: Phi 76 * 85.

Six, installation and debugging:

、液位變送器具有多種安裝固定方式

，以適應(yīng)不同現(xiàn)場(chǎng)情況。">1, liquid level transmitter with a plurality of installation, in order to adapt to different site conditions. ，可選擇墻壁安裝式

、水平管架式和垂直管架式等三種安裝方式可選擇，使您在現(xiàn)場(chǎng)安裝時(shí)得心應(yīng)手

。">When the site does not provide M20 * 1.5 internal thread or flange processing facilities, can choose the wall mounted, horizontal tube type and vertical tube type three installation options, make your handy in the on-site installation.

、在測(cè)量流動(dòng)性較大的介質(zhì)時(shí)，為防止傳感器劇烈擺動(dòng)

，用戶可選用配重附件

，以起到穩(wěn)定傳感器的作用，加配重時(shí)一定要要把配重物體放入容器底部

，以免拉壞傳感導(dǎo)線

。">In 2, medium measuring greater liquidity, in order to prevent the sensor sharp swings the user can choose to play a stable weight attachment, the role of the sensor with weight must be to the weight of objects into the bottom of the container, so as not to pull the bad conductor.

，用戶應(yīng)選用傳感器防護(hù)罩來(lái)保護(hù)傳感器

，以免被異物損壞或影響測(cè)量的準(zhǔn)確性。">3, in the field of environment is bad, the user should choose the sensor protection cover to protect the sensor, the measurement accuracy of the foreign body to avoid being damaged or infected.

、使用桿式液位變送器時(shí)

，如果不是金屬容器

，則需要把變送器的外殼用一根導(dǎo)線接入容器的底部，否則測(cè)量不準(zhǔn)確

。">4, the use of bar type liquid level transmitter, if not the metal containers, you need to put a wire connecting the bottom of the container with the transducer shell, otherwise the measurement is not accurate.

，若需要現(xiàn)場(chǎng)調(diào)整可采取以下方法：">This product has been calibrated at the factory, if you need to adjust the site can take the following methods:

1, the debugging method of intelligent circuit:

，同時(shí)按住“Z"鍵和“S"鍵8秒鐘后同時(shí)松開(kāi)

，再將 “Z" 鍵按一下，輸出電流自動(dòng)調(diào)整到4mA

。">The zero - position when the liquid level is low, at the same time, press the "Z" button and the "S" button for 8 seconds and then release the "Z" button, the output current is automatically adjusted to 4mA.

，同時(shí)按住“Z"鍵和“S"鍵8秒鐘后同時(shí)松開(kāi)，再將“S"鍵按一下

，輸出電流自動(dòng)調(diào)整到20mA

。">Full - field adjusting when the liquid level is high, at the same time, press the "Z" button and the "S" button for 8 seconds and then release the "S" button, the output current is automatically adjusted to 20mA.

2, the debugging method of analog circuit:

，用螺絲刀緩慢旋轉(zhuǎn)“Z"電位器

，觀察電流表的讀數(shù)接近4mA。">When the liquid level in the lower limit, the screwdriver is rotated slowly "Z" potentiometer, observe the meter readings close to 4mA.

，用螺絲刀緩慢旋轉(zhuǎn)“S"電位器

，觀察電流表的讀數(shù)接近20mA。">When the liquid level in the cap with a screwdriver, slowly rotating "S" potentiometer, observe the meter readings close to 20mA.

，直到零點(diǎn)和量程都分別為準(zhǔn)確的4mA和20mA

。">Repeat 2-3 times, until the zero and span are respectively 4mA and 20mA accurately.

。">After adjustment, we should tighten the lid.

、安裝與使用說(shuō)明：">Seven, installation and use:

，尤其是柔性探極需在罐底采取拉緊和固定措施

。">1, we must try to keep the poles and the tank wall (or auxiliary probe) parallel, especially flexible probe to tighten and fixing measures at the bottom of the tank.

，不可施力于其他部位

。">Six angle bolts 2, installation wrench screwing process connection, do not use force on other parts.

。">3, probe properly near the tank wall is helpful to improve the measurement sensitivity.

、容器為上方進(jìn)料時(shí)，探極應(yīng)盡量遠(yuǎn)離進(jìn)料口

，并避免物料直接淋濺到探極上

。">4, above the container for feeding, the probe should be kept away from the inlet, and avoid the material directly to probe on the splash.

，應(yīng)確保儀表與容器連接處接觸良好（容器與儀表間接觸電阻＜1Ω）

。">5, no auxiliary probe, should ensure that the instrument is connected with the container at good contact (contact resistance between the container and the instrument is less than 1 ohms).

，請(qǐng)擰緊電纜接頭處鎖緊帽

。">6, after wiring, tighten the cable joint locking cap.

，傳感器須定做散熱結(jié)構(gòu)

。">7, the medium temperature is higher than 100 DEG C, the sensor must custom heat dissipation structure.

Eight, the selection of encoding:

Type spectrum										Explain
ZW-LT70										Capacitance materiallevel meter (Zhongwei control)
category	One									Cable type
	Two									，直接接觸液體介質(zhì)）">Rod type (sensor is installed at the bottom, direct contact with liquid medium)
	Three									Antiseptic
	Four									，不直接接觸介質(zhì)）">The guide rod (pressure sensor mounted on the upper part, is not in direct contact with the media)
Process connection form		T								Mounting bracket
		N								Flange mounting DN40 PN1.0
		K								Tri-Clamp
		Y								Special agreement
Connect the sensor material			One							Three hundred and four	Bar type
			Two							Three hundred and sixteen
			Three							316L
			Four							Ding Qing rubber and PVC Composites	Cable type
			Five							PTFE (polypropylene flange)
Proof way				O						No explosion
				E						Explosion-proof Exia II CT6
Display mode					O					Without on-site instructions
					Z					With current meter indication ( 0-100% Scale)
					X					With on-site display
The weight of						O				Without counterweight
						W				Need to balance
							-.			The installation height ( Mm )
								-.		Measurement of height ( Mm )
									-.	The measured medium density ( G/cm3 )

、設(shè)計(jì)選用及訂貨須知：">Nine, design selection and ordering information:

、型號(hào)規(guī)格：ZW-LT700系列電容式物位計(jì)；">1, specifications: ZW-LT700 series capacitance level meter;

、被測(cè)介質(zhì)名稱：介質(zhì)密度

；">2, the measured medium Name: medium density;

；">3, measurement range: also known as nominal length;

、工作壓力：承受壓力；">4, working pressure: pressure;

、工作溫度：測(cè)量液體的溫度

；">5, working temperature: measure the temperature of the liquid;

；">6, material requirements: wetted materials;

、是否配套供應(yīng)法蘭、螺栓

、螺母

、閥門(mén)、密封墊圈等配件

；">7, supporting the supply of flanges, bolts and nuts, valve, sealing washers and other accessories;

、法蘭標(biāo)準(zhǔn)：法蘭的公稱通徑，DN20

、DN25

、DN50、DN80

、DN100等

；">8 standard: flange and flange nominal diameter, DN20, DN25, DN50, DN80, DN100 etc.;

。">Special requirements: 9, please indicate in detail before ordering.

、售后服務(wù)承諾：">9, customer service service commitment:

、我公司所售液位變送器系列產(chǎn)品在十二個(gè)月以內(nèi)出現(xiàn)質(zhì)量問(wèn)題的，負(fù)責(zé)免費(fèi)維修

。">1, I sold by the company level transmitter series product quality problems within 12 months, responsible for free maintenance.

、質(zhì)保期內(nèi)如我公司產(chǎn)品出現(xiàn)任何質(zhì)量問(wèn)題，我公司負(fù)責(zé)免費(fèi)維修或更換

。">2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.

、質(zhì)保期內(nèi)如用戶使用不當(dāng)，造成產(chǎn)品損壞

，我公司負(fù)責(zé)維修

，收取損壞部件成本費(fèi)。">3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.

、質(zhì)保期后產(chǎn)品出現(xiàn)質(zhì)量問(wèn)題

，我公司負(fù)責(zé)維修，收取損壞部件成本費(fèi)

。">4, after the warranty period of product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.

、如用戶需我公司現(xiàn)場(chǎng)服務(wù)，對(duì)省內(nèi)用戶我公司服務(wù)人員12小時(shí)內(nèi)到達(dá)現(xiàn)場(chǎng)

，省外用戶48小時(shí)內(nèi)到達(dá)現(xiàn)場(chǎng)

。">5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.

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