3151/3051豎管道式差壓密度計(jì)用于各種液體或液態(tài)混合物密度在線測量的自動(dòng)化測量儀表。是一種用于連續(xù)在線測量液體密度的現(xiàn)場儀表，可直接用于工業(yè)生產(chǎn)過程。智能在線密度計(jì)采用先進(jìn)技術(shù)，包括：一個(gè)電容式高精度差壓傳感器以及與其相連接的、插入生產(chǎn)過程的一對(duì)壓力中繼器。在兩個(gè)壓力中繼器之間有個(gè)溫度傳感器，用來補(bǔ)償過程液體的溫度變化。3151/3051豎管道式差壓密度計(jì)工作時(shí)連續(xù)在線測量液體密度，無過程中斷?？芍苯佑糜谏a(chǎn)過程的控制；采用一體化的兩線制變送器結(jié)構(gòu)，無活動(dòng)部件安裝使用方便、維護(hù)簡單；配帶清洗裝置，可定期清洗探頭，從而保證使用精度。
3151 / 3051 vertical pipe differential pressure densimeter is an automatic instrument for on-line measurement of density of various liquids or liquid mixtures. It is a field instrument for continuous on-line measurement of liquid density, which can be directly used in industrial production process. The intelligent on-line densitometer adopts advanced technology, including a capacitive high-precision differential pressure sensor and a pair of pressure repeaters connected to it and inserted into the production process. There is a temperature sensor between the two pressure repeaters to compensate for the temperature change of the process liquid. 3151 / 3051 vertical pipeline differential pressure densimeter can measure liquid density continuously and on line without process interruption. It can be directly used for the control of the production process; it adopts the integrated two-wire transmitter structure, no moving parts, easy to install, use and maintain; equipped with cleaning device, the probe can be cleaned regularly to ensure the use accuracy.
決定精度的有，非線性，遲滯性，非重復(fù)性，溫度、零點(diǎn)偏置刻度，溫度的影響。但主要由壓力變送器非線性，遲滯性，非重復(fù)性，精度越高，價(jià)格也就越高。每一種電子式地測量計(jì)都會(huì)有精度誤差的,但是由于各個(gè)國家所標(biāo)地精度等級(jí)是不一樣的,比如,中國和美國等國家標(biāo)的精度是傳感器在線性度最好的部分,也就是我們通常所說的測量范圍的10%到90%之間的精度;而歐洲標(biāo)的精度則是線性度最不好的部分,也就是我們通常所說地測量反的0到10%以及90%到100%之間的精度.如歐洲標(biāo)的精度為1%,則在中國標(biāo)的精度就為0.5%。
The accuracy is determined by nonlinearity, hysteresis, non repeatability, temperature, zero offset scale, and temperature effect. But mainly by the pressure transmitter nonlinear, hysteresis, non repeatability, the higher the accuracy, the higher the price. Each kind of electronic geometer will have accuracy error, but because the accuracy level of each country is different, for example, the accuracy of national standards such as China and the United States is the best part of the sensor's linearity, that is, the accuracy between 10% and 90% of the measurement range as we usually call it; while the accuracy of European standard is the worst part of linearity, In other words, we usually say that the accuracy of the measurement reverse is between 0% and 10% and 90% to 100%. If the accuracy of European standard is 1%, the accuracy of Chinese standard is 0.5%.
產(chǎn)品在石化行業(yè)可廣泛應(yīng)用于石油、煉油、調(diào)油、油水介面檢測；在食品工業(yè)用于葡萄汁、番茄汁、果糖漿、植物油及軟飲料加工等生產(chǎn)現(xiàn)場；奶制品業(yè)；造紙業(yè)；黑漿、綠漿、白漿、堿溶液的測量；釀酒酒精度；化工類的尿素、清潔劑、乙二醇、酸堿及聚合物密度的測量。還可應(yīng)用于采礦鹽水、鉀堿、天然氣、潤滑油、生物制藥等行業(yè)。
The products can be widely used in the petrochemical industry for the detection of oil, oil refining, oil blending and oil-water interface detection; in the food industry, it is used for the processing of grape juice, tomato juice, fructose syrup, vegetable oil and soft drinks; the dairy industry; the paper industry; the measurement of black pulp, green pulp, white pulp and alkali solution; the accuracy of wine making; the chemical urea, detergent, ethylene glycol, acid-base and polymer density Degree measurement. It can also be used in mining brine, potash, natural gas, lubricating oil, biopharmaceutical and other industries.
測量范圍：0.000–3.000g/cm3(0000–3000kg/m3)（用戶可隨意選用測量范圍）
Measurement range: 0.000 – 3.000g/cm3 (0000 – 3000kg / m3) (users can choose the measurement range at will)
標(biāo)定范圍：0.500–3.000g/cm3(500–3000kg/m3)（根據(jù)用戶選用測量范圍來標(biāo)定）
Calibration range: 0.500 – 3.000g/cm3 (500 – 3000kg / m3) (calibrated according to the measurement range selected by users)
測量精度：±0.01g/cm3、±0.005g/cm3、±0.002g/cm3（用戶自行選擇適用精度）
Measurement accuracy: ± 0.01g/cm3, ± 0.005g/cm3, ± 0.002g/cm3 (user's choice of applicable accuracy)
重復(fù)性：±0.0005g/cm3(±0.5kg/m3)
Repeatability: ± 0.0005g/cm3 (± 0.5kg/m3)
操作溫度范圍：-50℃~+250℃（不同介質(zhì)溫度可選，分為低溫、常溫、高溫型）
Operating temperature range: - 50 ℃ ~ + 250 ℃ (different medium temperatures can be selected, including low temperature, normal temperature and high temperature)
最大工作壓力：7.0MPa
Maximum working pressure: 7.0Mpa
流體粘度范圍：0–20000cP
Fluid viscosity range: 0 – 20000 CP
溫度系數(shù)：小于0.1kg/m3/℃(校正后)
Temperature coefficient: less than 0.1kg/m3 / ℃ (after correction)
壓力影響：可忽略不計(jì)
Pressure effect: negligible
內(nèi)置溫度傳感器：PT1000
Built in temperature sensor: PT1000
接液材質(zhì)：316L、哈氏合金C-276、鉭、鈦、聚四氟乙烯（特富?。?、
Contact material: 316L, Hastelloy C-276, tantalum, titanium, polytetrafluoroethylene (Teflon)
用上述的常規(guī)方法對(duì)智能變送器進(jìn)行校準(zhǔn)是不行的，因?yàn)檫@是由HART變送器結(jié)構(gòu)原理所決定了。因?yàn)橹悄茏兯推髟谳斎雺毫υ春彤a(chǎn)生的4-20mA電流信號(hào)之間，除機(jī)械、電路外，還有微處理芯片對(duì)輸入數(shù)據(jù)的運(yùn)算工作。因此調(diào)校與常規(guī)方法有所區(qū)別。
It is impossible to calibrate the smart transmitter with the above conventional method, because it is determined by the structure and principle of Hart transmitter. Because the intelligent transmitter between the input pressure source and the generated 4-20mA current signal, in addition to mechanical and electrical circuits, there is also a microprocessor chip for input data operation. Therefore, the adjustment is different from the conventional method.
實(shí)際上廠家對(duì)智能變送器的校準(zhǔn)也是有說明的，如3151/3051豎管道式差壓密度計(jì)的變送器，對(duì)校準(zhǔn)就有:“設(shè)定量程"、“重定量程"、“微調(diào)"之分。其中“設(shè)定量程"操作主要是通過LRV.URV的數(shù)字設(shè)定來完成配置工作，而“重定量程"操作則要求將變送器連接到標(biāo)準(zhǔn)壓力源上，通過一系列指令引導(dǎo)，由變送器直接感應(yīng)實(shí)際壓力并對(duì)數(shù)值進(jìn)行設(shè)置。而量程的初始、最終設(shè)置直接取決于真實(shí)的壓力輸入值。但要看到盡管變送器的模擬輸出與所用的輸入值關(guān)系正確，但過程值的數(shù)字讀數(shù)顯示的數(shù)值會(huì)略有不同，這可通過微調(diào)項(xiàng)來進(jìn)行校準(zhǔn)。由于各部分既要單獨(dú)調(diào)校又必需要聯(lián)調(diào)，因此實(shí)際校準(zhǔn)時(shí)可按以下步驟進(jìn)行:
In fact, the manufacturer also has instructions for the calibration of intelligent transmitter. For example, for the transmitter of 3151 / 3051 vertical pipeline differential pressure densimeter, there are "set range", "reset range" and "fine adjustment". The "set range" operation is mainly through the LRV.URV The "pressure source" is directly connected to the "pressure source" to set the working pressure. However, the initial and final setting of the range directly depends on the actual pressure input value. However, it should be noted that although the relationship between the analog output of the transmitter and the input value used is correct, the value displayed by the digital reading of the process value will be slightly different, which can be calibrated by adjusting the term. Since each part needs to be adjusted separately and jointly, the actual calibration can be carried out according to the following steps:
1．先做一次4-20mA微調(diào)，用以校正變送器內(nèi)部的D/A轉(zhuǎn)換器，由于其不涉及傳感部件，無需外部壓力信號(hào)源。
1. Make a 4-20mA fine adjustment to calibrate the D / a converter inside the transmitter. Since it does not involve sensing components, there is no need for external pressure signal source.
2．再做一次全程微調(diào)，使4-20mA、數(shù)字讀數(shù)與實(shí)際施加的壓力信號(hào)相吻合，因此需要壓力信號(hào)源。
2. Make another fine adjustment in the whole process to make the 4-20mA digital reading consistent with the actual pressure signal, so the pressure signal source is needed.
3．最后做重定量程，通過調(diào)整使模擬輸出4-20mA與外加的壓力信號(hào)源相吻合，其作用與變送器外殼上的調(diào)零(Z)、調(diào)量程(R)開關(guān)的作用完全相同。
3. Finally, rerange and adjust the analog output 4-20mA to match the external pressure signal source. Its function is exactly the same as the zero (z) and range (R) switches on the transmitter shell.
華恒西安變送器廠家采用多元化的經(jīng)營思想，在生產(chǎn)經(jīng)營工業(yè)自動(dòng)化儀表及裝置的同時(shí)，也在儀表控制系統(tǒng)集成，儀表及設(shè)備成套，安裝調(diào)試及維修服務(wù)，技術(shù)培訓(xùn)及咨詢等方面有突出的業(yè)績。代表項(xiàng)目有在彩虹集團(tuán)玻璃燒結(jié)動(dòng)能控制系統(tǒng)，漢江藥業(yè)鍋爐技術(shù)改造等。
Huaheng Xi'an transmitter manufacturer adopts diversified business ideas. While producing and operating industrial automation instruments and devices, it also has outstanding achievements in instrument control system integration, complete set of instruments and equipment, installation, commissioning and maintenance services, technical training and consulting. The representative projects include the kinetic energy control system of glass sintering in rainbow group and the technical transformation of boilers in Hanjiang pharmaceutical industry.
華恒西安變送器廠家憑借專業(yè)技術(shù)優(yōu)勢(shì)，可靠穩(wěn)定的產(chǎn)品質(zhì)量，堅(jiān)持最大限度的滿足用戶的需求是企業(yè)發(fā)展的動(dòng)力源泉，以優(yōu)質(zhì)專業(yè)的服務(wù)為我國電力、石油、化工、冶金、水泥、礦業(yè)、市政、造紙等行業(yè)提供了高性能價(jià)格比的工業(yè)自動(dòng)化儀表產(chǎn)品。為我國自動(dòng)化儀表的發(fā)展做出了重要
Huaheng Xi'an transmitter manufacturers rely on professional and technical advantages, reliable and stable product quality, adhere to the maximum meet the needs of users is the power source of enterprise development, with high-quality professional services for China's electric power, petroleum, chemical, metallurgy, cement, mining, municipal, papermaking and other industries to provide high performance price ratio of industrial automation instrument products. It is important for the development of automation instrument in China