A brief introduction to the structure and principle of 3151 differential pressure liquid level transmitter
西安華恒儀表制造廠家在立足西北自動(dòng)化工業(yè)控制生產(chǎn)的中,以自身核心,電路板設(shè)計(jì)和制造技術(shù),電容式壓力傳感器設(shè)計(jì)生產(chǎn)技術(shù).可以根據(jù)客戶(hù)要求，低成本對(duì)核心技術(shù)進(jìn)行延伸變形，實(shí)現(xiàn)個(gè)性化產(chǎn)品定制。主要產(chǎn)品有SMART（斯瑪特）系列壓力變送器、多參數(shù)變送器、流量器、溫度傳感器和物位（液位變送器廠家，為我國(guó)電力、石油、化工、冶金、水泥、礦業(yè)等行業(yè)提供了高性能價(jià)格比的工業(yè)自動(dòng)變送器廠家產(chǎn)品./液位變送器生產(chǎn)|3151差壓液位變送器結(jié)構(gòu)原理簡(jiǎn)介
Based on the northwest automation industrial control production, Xi'an Huaheng instrument manufacturer, with its own core, circuit board design and manufacturing technology, capacitive pressure sensor design and production technology, can extend and deform the core technology according to the customer's requirements at low cost, and realize personalized product customization. The main products are smart (SMART) series pressure transmitter, multi parameter transmitter, flowmeter, temperature sensor and level (liquid level transmitter manufacturer, which provides high performance price ratio industrial automatic transmitter manufacturer products for China's power, petroleum, chemical, metallurgical, cement, mining and other industries
差壓液位變送器用于可以通過(guò)hart475手操器或HART 275手操器相互通訊，通過(guò)它們進(jìn)行設(shè)定和監(jiān)控等。差壓液位變送器用于防止管道中的介質(zhì)直接進(jìn)入變送器里，感壓膜片與變送器之間靠注滿流體的毛細(xì)管連接起來(lái)。它用于測(cè)量液體、氣體或蒸汽的液位、流量和壓力，然后將其轉(zhuǎn)變成4～20mA DC信號(hào)輸出。3151差壓液位變送器的結(jié)構(gòu)原理及工作性能
The differential pressure liquid level transmitter is used to communicate with each other through Hart 475 or Hart 275, and to set and monitor through them. The differential pressure liquid level transmitter is used to prevent the medium in the pipeline from entering the transmitter directly. The pressure sensing diaphragm and the transmitter are connected by a capillary filled with fluid. It is used to measure the liquid level, flow and pressure of liquid, gas or steam, and then convert it into 4-20mA DC signal output. Structure principle and performance of 3151 differential pressure liquid level transmitter
1）3151差壓液位變送器的結(jié)構(gòu)原理。E－JA110A差壓液位變送器由單晶硅諧振式傳感器上的兩個(gè)H形振動(dòng)梁分別將差壓、壓力信號(hào)轉(zhuǎn)換為頻率信號(hào)送到脈沖計(jì)數(shù)器，再將兩頻率之差直接傳遞到微處理器進(jìn)行數(shù)據(jù)處理，經(jīng)D/A轉(zhuǎn)換器轉(zhuǎn)換為與輸入信號(hào)相對(duì)應(yīng)的4～20mA輸出信號(hào)，并在模擬信號(hào)上疊加一個(gè)BRAIN/HART數(shù)字信號(hào)進(jìn)行通信[1]。膜盒組件中內(nèi)置的特性修正存儲(chǔ)器主要存儲(chǔ)傳感器的環(huán)境溫度、靜壓及輸入/輸出特性等修正數(shù)據(jù)，經(jīng)微處理器運(yùn)算，可使變送器獲得優(yōu)良的溫度特性、靜壓特性和輸出特性。/液位變送器生產(chǎn)|3151差壓液位變送器結(jié)構(gòu)原理簡(jiǎn)介
1) The structure and principle of 3151 differential pressure liquid level transmitter. E-ja110a differential pressure liquid level transmitter transforms the differential pressure and pressure signals into frequency signals by two H-shaped vibration beams on the single crystal silicon resonant sensor and sends them to the pulse counter, and then directly transmits the difference between the two frequencies to the microprocessor for data processing. After the D / a converter, it is converted into 4-20mA output signal corresponding to the input signal, and a brain / Hart is superposed on the analog signal Digital signal for communication [1]. The built-in characteristic correction memory in the capsule module mainly stores the correction data such as the ambient temperature, static pressure and input / output characteristics of the sensor. Through microprocessor operation, the transmitter can obtain excellent temperature, static pressure and output characteristics.
通過(guò)I-O口與外部設(shè)備（如手持智能終端BT200或275以及DCS中的帶通信功能的I/O卡）以數(shù)字通信方式傳遞數(shù)據(jù)，即高頻2.4kHz（BRAIN協(xié)議）或1.2kHz（HART協(xié)議）數(shù)字信號(hào)疊加在4～20mA信號(hào)線上。在進(jìn)行通信時(shí)，頻率信號(hào)對(duì)4～20mA的信號(hào)不產(chǎn)生任何擾動(dòng)影響，變頻器工作原理見(jiàn)圖1。
Through I-O port and external equipment (such as BT200 or 275 handheld intelligent terminal and I / O card with communication function in DCS), data is transmitted in digital communication mode, i.e. high frequency 2.4khz (brain protocol) or 1.2kHz (HART Protocol) digital signals are superimposed on 4-20mA signal line. During the communication, the frequency signal does not produce any disturbance to the 4-20mA signal, and the working principle of the frequency converter is shown in Figure 1.
2）3151差壓液位變送器的工作性能主要有：?jiǎn)尉Ч柚C振式傳感器；過(guò)程連接與其他產(chǎn)品兼容，實(shí)現(xiàn)*佳測(cè)量；超低功耗，單只靜態(tài)時(shí)0.096W，滿量程功耗為0.48W，輸出電流內(nèi)部限制功耗為0.6W；高穩(wěn)定性和高可靠性；完善的自診斷及遠(yuǎn)程設(shè)定通信功能；外部零點(diǎn)/量程調(diào)校。
2) The performance of 3151 differential pressure liquid level transmitter mainly includes: single crystal silicon resonant sensor; process connection is compatible with other products to achieve * good measurement; ultra-low power consumption, single static 0.096w, full range power consumption 0.48w, output current internal limit power consumption 0.6W; high stability and reliability; perfect self diagnosis and remote setting communication function; external zero / range adjustment 。
3151差壓液位變送器自診斷故障處理
Self diagnosis troubleshooting of 3151 differential pressure liquid level transmitter
采用微型計(jì)算機(jī)技術(shù)的3151差壓液位變送器具有十分完整的自診斷功能。如自診斷時(shí)發(fā)現(xiàn)錯(cuò)誤，儀表頭的內(nèi)藏指示計(jì)將顯示錯(cuò)誤代碼，然后根據(jù)所顯示的錯(cuò)誤代碼，查明故障情況。如測(cè)量值出現(xiàn)異常，應(yīng)先確定是被測(cè)流體變化異常還是測(cè)量系統(tǒng)出錯(cuò)。如確認(rèn)是測(cè)量系統(tǒng)出錯(cuò)，需分別從運(yùn)行狀況、安裝環(huán)境和變送器自身等方面著手檢查，采取相應(yīng)措施解決。
3151 differential pressure liquid level transmitter with microcomputer technology has very complete self diagnosis function. If an error is found during self diagnosis, the embedded indicator in the instrument head will display the error code, and then find out the fault condition according to the displayed error code. If the measured value is abnormal, it is necessary to determine whether the measured fluid is abnormal or the measurement system is wrong. If it is confirmed that the measurement system is in error, it is necessary to check the operation condition, installation environment and transmitter itself, and take corresponding measures to solve the problem.
1）當(dāng)3151差壓液位變送器輸出顯示超出規(guī)定參數(shù)值時(shí)，先看儀表頭內(nèi)藏指示計(jì)有無(wú)錯(cuò)誤代碼顯示。若無(wú)錯(cuò)誤代碼顯示，且電源接線也正確，可檢查平衡閥是否完全關(guān)閉和高/低壓閥是否完全開(kāi)啟，以及測(cè)壓部分導(dǎo)壓管等處有無(wú)泄露和高/低壓測(cè)壓管連接是否正確。若以上內(nèi)容均無(wú)問(wèn)題，*后進(jìn)行調(diào)零，故障即可解決[2-3]。/液位變送器生產(chǎn)|3151差壓液位變送器結(jié)構(gòu)原理簡(jiǎn)介
1) When the output display of 3151 differential pressure liquid level transmitter exceeds the specified parameter value, first check whether there is error code display on the indicator hidden in the instrument head. If there is no error code display and the power wiring is correct, check whether the balance valve is fully closed and the high / low pressure valve is fully open, and whether there is leakage at the pressure measuring part of the impulse pipe and whether the high / low pressure pipe is connected correctly. If there is no problem with the above content, * and then zero, the fault can be solved [2-3].
2）當(dāng)3151差壓液位變送器無(wú)輸出信號(hào)或輸出值與實(shí)際流量不相符或被測(cè)流量變化而輸出信號(hào)無(wú)相應(yīng)變化時(shí)，先看儀表頭內(nèi)藏指示計(jì)有無(wú)錯(cuò)誤代碼顯示，若無(wú)自診斷錯(cuò)誤代碼提示，且電源接線也正確，則需進(jìn)一步檢查電源電壓是否正常及負(fù)載電阻連接是否正確，檢查測(cè)壓部分的導(dǎo)壓管有無(wú)壓力泄露。若仍查找不出原因，則應(yīng)仔細(xì)檢查變送器回路連線，判斷是否因斷線或布線錯(cuò)誤引起的故障[4]。儀表的故障處理一般遵循由簡(jiǎn)單到復(fù)雜的原則，3151差壓液位變送器因其優(yōu)良的性能，在實(shí)際使用中所出現(xiàn)的各類(lèi)故障通常都與被測(cè)流體、運(yùn)行環(huán)境等外部因素有關(guān)。譬如出現(xiàn)零位經(jīng)常變動(dòng)或指示值不準(zhǔn)時(shí)，很可能是因變送器測(cè)壓部分滯留氣泡或夾帶有不純的被測(cè)流體等雜質(zhì)，這時(shí)松開(kāi)排液/氣螺釘，排空滯留氣體或雜質(zhì)，故障即可解決。/液位變送器生產(chǎn)|3151差壓液位變送器結(jié)構(gòu)原理簡(jiǎn)介
2) When there is no output signal of 3151 differential pressure level transmitter or the output value does not match the actual flow or the output signal does not change due to the change of measured flow, first check whether there is error code display on the indicator hidden in the instrument head. If there is no self diagnosis error code prompt and the power supply wiring is correct, further check whether the power supply voltage is normal and the load resistance connection is correct. Check Whether there is pressure leakage in the impulse pipe of the pressure measuring part. If the cause still cannot be found, carefully check the transmitter circuit wiring to determine whether the fault is caused by disconnection or wiring error [4]. The fault treatment of the instrument generally follows the principle from simple to complex. Because of its excellent performance, all kinds of faults in actual use are usually related to external factors such as the measured fluid, operation environment, etc. For example, if the zero position often changes or the indication value is not on time, it is likely that the air bubble is trapped in the pressure measuring part of the transmitter or impurities such as impure measured fluid are entrained. At this time, loosen the drain / gas screw, empty the trapped gas or impurities, and the fault can be solved.
華恒變送器廠家研發(fā)出傳感器和智能電路板兩項(xiàng)核心技術(shù)，不僅所有產(chǎn)品的核心部件技術(shù)全部掌握，工業(yè)自動(dòng)變送器廠家的精確度也在不斷提高，由0.2級(jí)提高到0.1級(jí)。還可通過(guò)對(duì)所掌握核心技術(shù)進(jìn)行延伸，變形出測(cè)流量、測(cè)溫度的其他產(chǎn)品。
Huaheng transmitter manufacturers have developed two core technologies, sensor and intelligent circuit board. Not only do they master all the core component technologies of all products, but also the accuracy of industrial automatic transmitter manufacturers is constantly improving, from level 0.2 to level 0.1. Through the extension of the core technology, other products for measuring flow and temperature can be deformed.

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液位變送器選型   液位變送器生產(chǎn)原理   3151液位變送器選型