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Capacitive level gaugeCapacitivelevelgauge

Health type capacitance level meter

Health type capacitance level meter belongs to the capacitive liquid level detecting instrument, it …

Description：

、產(chǎn)品概述：">Productoverview:

ZW-LT702K series Health type capacitance level meter ，輔以工業(yè)級范圍測量系統(tǒng)溫度漂移補(bǔ)償技術(shù)制作而成。">Is the use of radio frequency capacitance detection technology, combined with industrial grade range measuring system of temperature drift compensation technology produced. 、分辨力差等缺陷。">In addition to its traditional capacitance (liquid) has the advantages of position detection technology, but also to solve the traditional capacitive (liquid) measurement system of temperature drift meter to overcome the large, poor resolution, detection of linear defects and poor. 。">Can be applied to various industrial environments of measured medium components of medium level measurement solution is relatively stable.

、工作原理：">Two, work principle:

，傳感器迎液面受到的壓力公式為：Ρ = ρ .g.H + Po">ZW-LT702K series <strong> sanitary type capacitance level meter</strong> based on capacitive sensor, when the liquid level transmitter into the measured liquid in a certain depth, the pressure sensor at level formula: P = P.G.H + Po

Type:

P: welcome to the pressure liquid level transmitter

P: the measured liquid density

Po: the surface atmospheric pressure

H: transmitter input liquid depth

，再將液面上的大氣壓 Po 與傳感器的負(fù)壓腔相連

，以抵消傳感器背面的 Po ，使傳感器測得壓力為：ρ .g.H

，顯然 , 通過測取壓力 P

，可以得到液位深度。">At the same time, the pressure of the liquid into the positive pressure chamber through the gas sensor of stainless steel, then vacuum cavity pressure sensor and Po on the surface of the sensor is connected to offset on the back of the Po, the sensors for pressure: P.G.H, obviously, by measuring the pressure of P, can get the level of depth.

、應(yīng)用場合：">Three, application:

、高溫、強(qiáng)腐蝕

、易結(jié)晶

、防堵塞、防凍結(jié)以及固體粉狀

、粒狀物料等特殊條件下的液位

、料位或物位的連續(xù)檢測，應(yīng)用于各種工業(yè)過程中的衛(wèi)生級檢測控制。">ZW-LT702K series <strong> sanitary type capacitance level meter</strong> can be used in high pressure, high temperature, strong corrosion, easy crystallization, anti blocking, anti freeze and solid powdery and granular materials under the special circumstances of the liquid level or level of continuous detection, used in various industrial processes in sanitary inspection and control.

、主要特點(diǎn)：">Four, main features:

、高性能：制作變送器的電容材料具有極穩(wěn)定的物理化學(xué)性能，使產(chǎn)品具有******的性能

。">1, high performance capacitor materials: transmitter physical chemistry performance is extremely stable, so that products with high performance. ，穩(wěn)定性優(yōu)于± 0.05%FS ，如此高的性能是采用其它敏感原理的產(chǎn)品難以達(dá)到的

。">The sensor precision up to + 0.02%FS, the stability is better than 0.05%FS, such high performance is the use of other products to achieve sensitive principle.

、機(jī)械變形：敏感電容模極板間距的微小的變化，即可產(chǎn)生可測量的電壓信號變化

，小的機(jī)械變形使傳感器的遲滯和非重復(fù)性誤差大大降低

，同時傳感器的速度也得到很大提高。">2, mechanical deformation: the sensitive capacitance die plate spacing tiny changes, can change the voltage signal can be measured, small mechanical deformation of the sensor hysteresis and repeatability error is greatly reduced, and the speed sensor is also improved.

、測量范圍寬：的壓力變送器具有很寬的測量范圍

，它可對 25Pa ～ 70MPa 范圍的壓力進(jìn)行準(zhǔn)確的測量，且具有******的穩(wěn)定性

。">3, wide measuring range, the pressure transmitter has a wide measurement range, it can be measured on 25Pa ~ 70MPa pressure accurately, and has high stability.

、長期穩(wěn)定性好：壓力變送器與其他******產(chǎn)品相比具有更高的穩(wěn)定性，與其它傳感器如金屬應(yīng)變式傳感器不同

，電容式壓力變送器的蠕變

，時效和溫度影響均很小。">4, good long-term stability, pressure transmitter and other similar products, compared with higher stability, and other sensors such as metal strain sensor, creep capacitive pressure transmitter, temperature and aging effects are very small.

。 ">The sensor affects almost all adverse factors on the output stability of capacitive sensor are less than other forms of.

。">Pressure transmitter zero stability up to 0.05%FS/ years.

，而無需進(jìn)行信號放大

，壓阻式傳感器（薄模式

，C 式）輸出信號低

，易受外界信號干擾等缺點(diǎn)

，而這通常是傳感器穩(wěn)定性差，受溫度影響大

，易受電磁波干擾的主要原因

。">5, high pressure transmitter circuit output signal: the tiny change of capacitance is directly converted into high output signal without signal amplification, piezoresistive sensor (thin mode C) output signal is low, vulnerable to outside interference and other shortcomings, which is usually affected by temperature sensor stability is poor. The main reason, vulnerable to electromagnetic interference.

，因而可與許多酸堿溶液

，腐蝕性氣體或液體很好地相容。">6, good corrosion resistance, pressure transmitter is in contact with the media, the material is made of stainless steel material, and thus many acid-base solution, corrosive gas or liquid good compatibility.

、抗電磁場干擾：高輸出信號

、抗干擾設(shè)計及采用金屬外殼和

，壓力變送器對外部電磁場具有很高的抑制能力，它具有與可編程控制相當(dāng)?shù)目垢蓴_能力

。">7, anti electromagnetic interference, high output signal, anti-interference design and use of metal and external electromagnetic field, pressure transmitter has a high rejection ability, and it has programmable control anti-interference ability is.

、在惡劣環(huán)境中工作：的壓力變送器非常經(jīng)久耐用，它的工業(yè)級的產(chǎn)品可承受zui小 10 7 次測滿量程壓力循環(huán)

，如果工作壓力不

，傳感器的循環(huán)壽命幾乎可達(dá)到無限長，而且其工業(yè)的產(chǎn)品均能承受 100 ～ 200kg 的沖擊和zui小 10 ～ 20 的振動

。">8, in the harsh environment: the pressure transmitter is very durable, its industrial products can withstand Zui 107 tested full-scale pressure cycle, if the working pressure is not, the cycle life of sensor is almost infinite, and the vibration of industrial products can withstand the impact of 100 ~ 200kg and Zui small 10~20.

、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: 76 in diameter 85.

、安裝與調(diào)試：">Six, installation and debugging:

，以適應(yīng)不同現(xiàn)場情況

。">1, liquid level transmitter with a plurality of installation, in order to adapt to different site conditions.

、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)場安裝時得心應(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.

、在測量流動性較大的介質(zhì)時

，為防止傳感器劇烈擺動

，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.

、在現(xiàn)場環(huán)境較惡劣時

，用戶應(yīng)選用傳感器防護(hù)罩來保護(hù)傳感器，以免被異物損壞或影響測量的準(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，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:

、采用智能電路的調(diào)試方法：">1, the debugging method of intelligent circuit:

，再將 “Z" 鍵按一下

，輸出電流自動調(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.

，同時按住“Z"鍵和“S"鍵8秒鐘后同時松開

，再將“S"鍵按一下，輸出電流自動調(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.

、采用模擬電路的調(diào)試方法：">2, the debugging method of analog circuit:

，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.

，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.

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

，應(yīng)將變送器的蓋子擰緊。">After adjustment, we should tighten the lid.

、注意事項：">Seven, matters needing attention:

、凡供貨產(chǎn)品均帶有產(chǎn)品合格證及使用說明書其中有產(chǎn)品編號、技術(shù)參數(shù)

、接線圖

、出廠日期等請認(rèn)真查對以免用錯

。">1, all products are supplied with product certificate and instructions including product number, technical parameters, wiring diagrams, etc. Please carefully check the date so wrong.

。">2, the installation should be according to the product connection and thread type, check whether the scene interface and product interface. ，應(yīng)慢速擰緊，注意密封

，不能把扭矩直接加到變送器殼體上

，只能加在變送器接口的六方上。">If the thread interface should slow attention not to tighten, seal, torque is applied directly to the transmitter housing, only in the six party interface on the transmitter.

、接線應(yīng)嚴(yán)格按照我公司使用說明要求接線

。">3, the connection should be strictly in accordance with the instructions to connect our company.

，禁止隨意拆卸

、碰撞、跌落

、用力甩打

。">4, this product can change the instrument precision, prohibit disassemble, collision and drop, forced to fight rejection.

，但預(yù)熱30分鐘輸出穩(wěn)定

。">5, the transmitter power can work, but 30 minutes warm-up stable output.

，應(yīng)關(guān)掉電源

，停止使用，進(jìn)行檢查

，或直接向我公司技術(shù)部門

。">6, if abnormal, should turn off the power, stop using, check, or directly to the technical department of our company.

、儲存時應(yīng)恢復(fù)原包裝

，存放在陰涼、干燥

、通風(fēng)的庫房內(nèi)

。">7, transportation and storage should restore the original packaging and store in a cool, dry and ventilated warehouse.

8, installation and use should pay attention not to induced wire break.

、安裝時感應(yīng)導(dǎo)線要距離水池的壁至少10CM以上,否則測量不準(zhǔn)確.">9, when installing the induction wire to the pool wall at least distance of more than 10CM, otherwise the measurement is not accurate.

、全四氟結(jié)構(gòu)和桿式液位的接地線一定要和被測介質(zhì)導(dǎo)通，否則測量不準(zhǔn)確

。">The grounding wire 10, PTFE rod structure and the liquid level and the measured medium must be conducted, otherwise the measurement is not accurate.

。">11, the installation site should adopt effective lightning protection measures.

、本系列任何一款液位變送器外殼須***可靠接地

，接地電阻應(yīng)小于4Ω。">12, this series of any liquid level transmitter shell must be reliable grounding, grounding resistance should be less than 4.

、安全柵應(yīng)取得防爆合格證

，其安裝應(yīng)按其說明書的要求進(jìn)行。">13, safety gate should be made explosion-proof certification, the installation should be carried out according to the requirements of the specification.

、當(dāng)變送器用于“0“區(qū)時

，向安全柵供電的電源變壓器須滿足GB3836.4-2000第8.1條的要求。">14, when the transmitter for "0" when the security gate to the power transformer shall meet the requirements of Article 8.1 of the GB3836.4-2000.

、選型編碼：">Eight, the selection of encoding:

Type spectrum										Explain
ZW-LT70										Capacitance level 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									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							，（聚丙烯法蘭）">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 )

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