I级，Div II (不使用IS安全栅)
I级，Div I (使用IS安全栅)
I级，Div II (不使用IS安全栅)
I级，Div I (使用IS安全栅)
|外壳等级||IP66 (加拿大除外)，4X型(加拿大除外)，3S/4X型(加拿大)||IP66/ NEMA 4A/ CSA 3S|
|电源||两线制24 V DC回路供电||两线制24 V DC回路供电|
|输出信号||双向HART数字通信，叠加在mA (4-20 mA)信号上||双向HART数字通信，叠加在mA (4-20 mA)信号上
可选FF (基金会现场总线)和PF (Profibus)通信
Between measuring plant and control rooms, especially when the distance between these places is greater than the length of the standard appropriate electrode cables, the connecting equipment can be an expedient method for connecting sensor cables to a measuring instrument.
One of the primary applications for high purity water is for boiler feed water. The measurement of pure water pH can be one of the quickest indicators of process contamination in the production or distribution of pure water. Effective chemical treatment of the feed water is vital in maintaining the useful operating life and minimizing maintenance costs of the boiler.
Industry:Power, Pharmaceutical, Common
Caustic soda and hydrochloric acid, produced in electrolyzer plants, are fundamental materials used in varieties of industries; chemicals, pharmaceuticals, petrol-chemicals, pulp and papers, etc. Profit is the result of the effective production with minimized running / maintenance cost. Proper control of the process brings you stabilized quality of products with the vast operational profit.
For control of batch neutralization, a pH measurement coupled with a timer-controlled chemical feed scheme provides very satisfactory results.
This system can be adapted for either acid waste or alkaline waste neutralization.
There are a number of suppliers of oil and fat products used for edible purposes. These products include, but are not limited to olive oil, peanut oil, soybean oil, sunflower oil, lard, shortening, butter, and margarine. The raw materials for these products include animal by-products, fleshy fruits (palm and olive), and oilseeds.
Industry:Food and Beverage
Process liquid analyzers such as pH meters, conductivity meters, ORP meters, and density meters play an important role at electrolysis plants in the control of concentrations of various process solutions. This requires both precision and stability under harsh conditions that include highly corrosive substances, high temperatures, and many impurities.
Control of sodium chloride (NaCl) concentration at a salt dissolver where solid salt is dissolved in water, is highly important because of the electrolysis efficiency. A conventional way of measuring the concentration of supersaturated NaCl solution had been performed by using non-contact type sensors (e.g., γ-ray density meter) since NaCl, impurities, and precipitates are in the solution.
In a semiconductor plant, a variety of chemicals are used in various manufacturing processes. The chemicals used for specific purposes are produced by diluting raw liquid with demineralized water using in diluting equipment, and the control of the concentration at this point is performed by conductivity measurement.
In the manufacturing process of Pharmaceutical, Chemical and Food & Beverage industries, the cleaning and sterilization of tanks and piping are done with various cleaning solutions, fresh or hot water and steam after manufacturing products. Clean-In-Place (CIP) is the system designed for automatic cleaning and disinfecting.
Wastes have been considered to be a serious worldwide environmental problem in recent years. Because of increasing pollution, these wastes should be treated. However, industrial wastes can contain a number of valuable organic components. Recovery of these components is important economically. Using conventional distillation techniques, the separation of acetic acid and water is both impractical and uneconomical, because it often requires large number of trays and a high reflux ratio. In practice special techniques are used depending on the concentration of acetic acid.
Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. Problems at the wet end (stock preparation) can rarely be corrected downstream. That is why monitoring and controlling pH in pulp stock is critical to the paper making process. Essentially, at every stage in the manufacture of paper, correct pH values play a vital role.
Reverse osmosis (RO) is a separation process that uses pressure to force a solution through a membrane that retains the solute on one side and allows the pure solvent to pass to the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure.
Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. The improved plant performance translates to the higher quality improvement and lower cost, and simultaneously environmental friendly plant operation.
Wastewater from electroplating facilities and certain types of chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR6) is reduced to trivalent chromium (CR3); and CR3 is precipitated as chromium hydroxide.
Industry:Electrical and Electronics
Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems to occur further downstream. There are three forms of oil encountered in wastewater treatment at a refinery.
Sour Water is the wastewater that is produced from atmospheric and vacuum crude columns at refineries. Hydrogen sulfide and ammonia are typical components in sour water that need to be removed before the water can be reused elsewhere in the plant. Removal of these components is done by sending the sour water from the process to a stripping tower where heat, in the form of steam, is applied.
Power plant boiler houses designed to burn coal or high sulfur oil are required by Federal and State pollution regulations to "scrub" (remove) sulfur dioxide from flue gasses to meet emission limits. SO2 in flue gasses is known to be harmful to the environment, as it is one contributor to the formation of acid rain. pH control is critical for the proper functioning of the scrubber system.
Seawater leak detection is the post-condensation water quality management processes. Damage to the ion exchange resin, which deionizes the supplied water, is also monitored during this process, and both of these applications are executed by a conductivity analyzer. (AN10D01P01-01E)
In the past, the boiler feed tank systems in sugar factories had to be checked several times a day to make sure there were no sugar solution leaks. This was a very laborious process and, as continuous monitoring was not possible, monitoring results were not reliable. When a leak occurred, recovery operations were very costly and time-consuming. (AN10D01K01-02E)
In flue gas desulfurization systems that use magnesium hydroxide (Mg(OH)2) slurry, the consumption of the desulfurization agent (Mg(OH)2) is controlled by using online pH analyzers. A great concern in the pH measurement is heavy staining of the pH electrodes by the Mg(OH)2 slurry. To ensure accurate measurement, frequent cleaning of the electrodes with an acid is required, adding to both maintenance workload and cost.
To defray energy costs, many industrial plants have their own boilers to generate steam in order to produce a portion of their energy needs. In addition to generating power, the steam may also be used directly in plant processes or indirectly via heat exchangers or steam jacketed vessels.
Fish perform all their bodily functions in water. Because fish are totally dependent upon water to breathe, feed and grow, excrete wastes, maintain a salt balance, and reproduce, understanding the physical and chemical qualities of water is critical to successful aquaculture. To a great extent water determines the success or failure of an aquaculture operation.
In stable dispersion of fine particles is the pre-requisite for the selective flocculation technique involving separation of ultra-fine valuable particles from the gangue. Among mineral processing techniques selective flocculation technique is known to have outstanding potential of capturing the particles of particular mineral in slurry of mixed mineral system by selective adsorption of water soluble polymers known as flocculants.
Yokogawa has been offering the EXA200 series two- wire liquid analyzer for processes since 1990. This analyzer has been used in various fields including the quality control of raw materials in process plants in the electric power and petrochemical industries, reaction management of products, quality control in waste water facilities, and quality monitoring of river water and tap water.
- FLXA202 / FLXA21 2-Wire Analyzer Installation and Wiring (Introduction and General Description) (4.5 MB)
- FLXA202 / FLXA21 2-Wire Analyzer Operation of pH/ORP (1.1 MB)
- FLXA202 / FLXA21 2-Wire Analyzer Operation of SC (1.2 MB)
- FLXA202 / FLXA21 2-Wire Analyzer Operation of ISC (1.1 MB)
- FLXA202 / FLXA21 2-Wire Analyzer Operation of DO (989 KB)
- FLXA202/FLXA21 Setting Table (171 KB)
- WTB10-DO1,-DO2,-DO3,-DO4 Terminal Box (687 KB)
- WTB10-PH# Terminal Box (823 KB)
- Yokogawa DTM FOUNDATION Fieldbus
- PROFIBUS GSD file - pH/ORP Converter FLXA21 (3 KB)
- PROFIBUS GSD file - SC Converter FLXA21 (3 KB)
- PROFIBUS EDD file - pH/ORP Converter FLXA21 (217 KB)
- PROFIBUS EDD file - SC Converter FLXA21 (224 KB)
- Fieldbus DD/CF file - pH/ORP Converter FLXA21
- Fieldbus DD/CF file - SC Converter FLXA21
- HART DD file - ISC Converter FLXA21 [DevRev 1]
- Yokogawa DTM HART
- HART DD file - SC Analyzer FLXA21 [DevRev 1]
- HART DD file -DO Converter FLXA202/FLXA21 [DevRev 2]
- Yokogawa DTM PROFIBUS
- HART DD file -DO Converter FLXA21 [DevRev 1]
- HART DD file -ISC Converter FLXA202/FLXA21 [DevRev 2]
- HART DD file -SC Converter FLXA202/FLXA21 [DevRev 2]
- HART DD file -pH/ORP Converter FLXA202/FLXA21 [DevRev 2]
- HART DD file -pH/ORP Converter FLXA21 [DevRev 1]
- FLEXA/EXA PH Series Process pH Analyzers Measurement System and Applications (2.4 MB)
- Cation Differential Quick Start Guide (1.4 MB)
- FLXA202/FLXA21 2-Wire Analyzer HART Communication (1.9 MB)
- FLXA21 Coating Procedure (235 KB)
- Conductivity Analyzer Guide (992 KB)
- Contacting Conductivity sensor selection guide (1.6 MB)
- FLXA21 2-Wire Analyzer (377 KB)
- FLXA21-D-S, FLXA21-D-U, FLXA21-D-E 2-Wire Analyzer Stainless steel Housing (316 KB)
- PH201G Distributor (214 KB)
- PH201G /TB Distributor (with /TB Terminal for power connection) (315 KB)
- Cable for pH Electrode (connect to PH202, FLXA202, FLXA21) K9148VA,K9148VB,K9148VC,K9148VD,K9148VE,K9148VF (176 KB)
- Operating Unit for Chemical Cleaning System PH8SM3-F, -G (FLXA21, FLXA202) (320 KB)