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 ※ ※ ※ Chengdu Calorimeter use: measuring water flow meters. Most of the accumulated water flow measurement. Generally divided into the displacement Chengdu, heat meters and speed of Chengdu Calorimeter two categories. Former accuracy than the latter, but require high water quality, water impurities susceptible to clogging. Record of Far EasTone water consumption meter, installed on the pipe, when users turn on the water on the table pointer or word wheel rotation that adopted by the water. 

 [To improve the measurement accuracy of water meters within the test cycle] 
 First, the selection of water meters 
 The type of meter, meter measuring range of the same caliber is different. The choice of meter-diameter, commonly used in flow of the user's actual amount of water close to the water meter. If the actual consumption of the water meter is small, simple meter-diameter water consumption to determine the need for necking treatment, so not only to the construction difficulty and the pressure loss. DN50 of the water meter, for example, specifically as shown in Table l. 
 A. Small caliber water 
 Urban, affluent areas, stealing bit less water, should use an ordinary Class B, C, level meter, water charges recovery is greater than 100%, with an average of up to 104%: generally dripping areas can be selected high sensitivity the dripping measurement of water meters or C level meter, to reduce human losses. 
 The dripping of the water meter of the metering speed up the holes of the impact of impeller rotation is relatively easy to block, filter hole area is far less than the ordinary water meters, valves scaling easy to have failed and lost the function of drip measurement. Therefore, intends to once every two years cleaning time in order to maintain its metrological characteristics or water charges recovery would be even lower. 
 Two. Large caliber water 
 Large-diameter water meter accounts for 1% of the total number of meter. But assume 70% of the measurement of water sales, therefore, the selection of large diameter water meter is more important. LXL type in the normal flow of occasions; occasions of heavy traffic or long-term traffic using WPD; small flow for a long time and there is little occasion of the large flow of WS type, LXF; a long time there were all kinds of small flow traffic LXF type; better economic conditions, the WPD type; debris in the water and more flow WS type or the LXS type; residential areas, rural areas, hospitals, factories, and other small LXF type; fire protection requirements of the bassoon small network users to use the the LXF Type; supply quantity or instantaneous flow of the occasion to caution the WS type, LXS-type, water pressure and the occasion of the rooftop water tanks to be used with caution LXF type; poor water quality special occasion should be installed a water treatment tank for a long time small flow situations with caution LXL type LXLC type, generally 40% -50% LXLC type, 20% to 30% of LXF-type, 20% -40% of LXS type or WS type, 10% -60% of the WPD-proportion selection The meter is relatively appropriate. 
 3. Strict implementation of storage testing procedures 
 For the purchase of each batch of water meters in the initial verification, must be strictly in accordance with the sampling plan, after receiving inspection, and test content items than for the first time test more stringent, prevent substandard goods into the water supply area. 
 Second, the use of process accuracy to improve 
 A. Strengthen the meter cycle test, do the meter run 
 Strictly enforced compulsory inspection on the water meter test cycle according to the provisions of the state "water meter" test procedures and standards, and organize relevant departments to conduct the assessment. Due to the large number of residential customers water meter, the proportion of water consumption of the total amount of water is chosen small. Therefore, the weekly inspection of the meter can give priority to the nominal-diameter ≥ 50 mm, small-caliber water meter of the degree of water meter accurately reported by the sales department, where appropriate, replacement, and ultimately meet national standards. 
 Two. The norms meter installation, to improve the accuracy of water meter 
 Initial installation or disassembly of meter process, it is necessary to strictly follow the technical specifications, with particular attention to the water meter seven downstream straight pipe must meet the requirements; filter and meter flange must have a certain length of straight pipe to connect the segments; meter disk to be to maintain the level, not tilted. Water meter is not installed in accordance with the technical specifications will make a big impact on the meter running, the construction units should be allowed to understand the water meter installation does not meet the specification requirements of the impact on the measurement accuracy for engineering acceptance of the unit, once such a situation, will not be acceptance . 
 3. There are plans to gradually promote the use of new water meters 
 In order to improve the measurement level of management, the newly installed large table users. Full use of the B scale. In recent years, our organization has carried out 42 new water meter WPD type, the WS-type low-flow field experiments, trials have shown that the amount of water increased by an average 26.9%. Among them, the nominal diameter ≥ 50mm water meter of water increased by 35.23%, the nominal diameter ≤ 25mm water meter water increased by 1.9%, the effect is more ideal. Selected in the future of water meters, replacement work, if the water meter long run in the larger flow, the choice of the WPD-type water meter. Users, if long-term run in a smaller flow, the choice of a vertical spiral wing, the water situation is relatively stable, water changed little lower in price of the ordinary screw-wing B-level meter is a reasonable choice. 
 In a large number of Grade A large table, according to the users of water law, water whether the water meter rated flow and other indicators as criteria for judging, in accordance with the priorities, step-by-step implementation of the principles of batch to replace the Class B meter compatible. 
 Selected the WPD type and vertical spiral wing water meter users continuous tracking of the user of the six water situation, if after six months of tracking, meter selection inappropriate, the meter should be replaced. 
 4. Meter winter insulation protective measures 
 Into the winter, the water meter management responsibility not to implement, has occurred repeatedly watch glass or table body, the cracking event of this situation, the company revised the water supply enterprises meter regulations, strengthen the work of the winter water meter insulation to ensure that meter of safe operation. 


 〖Chengdu the Calorimeter price〗 ≮ recommended heat meter supply business in Chengdu ≯ ┣ Chengdu the Calorimeter price ┫,,. 
 Chinese Name: Chengdu Calorimeter 
 English name: water on meter 
 Definition: direct card sports activity wall volume measurement chamber or the flow velocity on the role of the wing wheel in order to calculate the flow volume through the remote transmission pipeline flowmeter. 
 Applied sciences: 
 The card works (a discipline); 
 Industrial automation instruments and systems (two subjects); 
 Flow Meter - Flow Meter name (three subjects) 
 Chengdu heat meter installation: 
 1, Chengdu Calorimeter caliber should be based on the caliber of the installation pipe may be, the installation location should avoid exposure, flooding, ice and pollution, for the removal and credit card. 
 2 Chengdu Calorimeter level (facing up) to install. 
 The Chengdu Calorimeter installation should be preceded by clear the pipe within the gravel, flax and other debris in order to avoid the Chengdu Calorimeter failure. 
 4, the Chengdu heat meters as shown in the arrow direction should be consistent with the direction of the pipeline flow. 
 Chengdu Calorimeter installed in the boiler feed water side, to prevent the boiler of hot water and vapor return damage the internal parts of the Chengdu heat meters, it is best to install check valves at the outlet in Chengdu Calorimeter. 
 Chengdu Calorimeter A Brief History of: 
 Since 1825 the British Kelu Si invented a real instrument characteristics, balance tank Chengdu heat meters, heat meters in Chengdu for nearly two hundred years of history. China's Chengdu Calorimeter use and production of a late start. 1879, Li Hongzhang to make arrangements for the Navy in Lushunkou create China's first water plant. England colonialists in Shanghai in 1883 established a second water plant, and Chengdu the Calorimeter began to enter the Chinese. With some coastal cities have been the construction of water works, until the 20th century's Shanghai Guanghua Card Factory (the predecessor of the now Shanghai Guanghua Instrument Factory), imported from abroad, some of the parts produced heat meters in Chengdu. Quite a long time, Britain and France, Japan, Germany and other countries in Chengdu Calorimeter has been dominated by China Chengdu Calorimeter industry, these different varieties of complex specifications Chengdu heat meters, due to different standards, parts are not interchangeable, for after Far EasTone The Chengdu Calorimeter maintenance very difficult. 
 ; Telephone -136-0117-5960 of 134-6647-7624 Muyi manager [Chengdu, heat meters Price〗 ≮ of recommended the Chengdu Calorimeter supply businesses ≯ ┣ Chengdu the Calorimeter price ┫,,. 
 After the liberation in 1949, with the development of urban water supply, China's Chengdu Calorimeter industrial accordingly developed. Since 1955, Shanghai, Weihai, Weihai, Nanjing, Wuhan, Guangzhou and other cities remote the company has begun production Chengdu heat meters. Early 1980s, the the Chengdu Calorimeter industry in the Card Ministry of Industry organized by the Shanghai Industrial Automation Instrument Institute, according to the Chengdu the Calorimeter international standard ISO4046 requirements on small-caliber Chengdu Calorimeter launched eight pointer, the overall the national unified design of the impeller of the Chengdu heat meters. Unified design and Chengdu Calorimeter plastic parts, for the organization of specialized production of Chengdu Calorimeter create favorable conditions, greatly promoted the heat meters of industrial progress and development of China Chengdu, to meet the development needs of the growing urban and rural Far EasTone industry. In the 1990s, China's economic development continued rapid development of the Chengdu the Calorimeter industry has also experienced rapid development, the number of firms and total more than doubled, while a variety of intelligent Chengdu meter, Chengdu heat meter reading system and other products also began to rise. Accurate measurement can conserve resources, formal maker Chengdu heat meters. 
 Weihai remote meter reading system 
 Weihai remote meter reading system is divided into two kinds of wireless and wired meter reading. 
 485 transmission and the transmission of the M-BUS wired two kinds. Four lines (two power cords, two signal lines) is the main features of the 485 transmission, need to distinguish the polarity of the line; the main features of the M-BUS transmission is a two line, do power and load signal , and the two lines, regardless of polarity. 
 Weihai remote meter cable meter in accordance with the way technology, the Weihai remote meter can be divided into pulse (active), the camera type (passive), resistive (passive), photoelectric (passive). In terms of the reliability of the technology development direction and market share, the photoelectric current mainstream. 
 Direct reading of the meaning of the table is usually not powered, the meter reading when the power supply meter. 〖Chengdu the Calorimeter price〗 ≮ recommended heat meter supply business in Chengdu ≯ ┣ Chengdu the Calorimeter price ┫,,. 
 Measure the high level of Chengdu Calorimeter 
 Measured at a high level of Chengdu Calorimeter, can Chengdu heat meters in a small flow, including a larger flow range from fundamental to truly improve the Chengdu Calorimeter sensitivity and measurement capabilities. Piston Chengdu Calorimeter (also known as displacement) measurement level is generally up to grade C or D, but higher water quality requirements. 
 Note: most countries require the use of the Chengdu heat meters more than the measurement of grade B, the domestic industry also cancel the measurement of grade A of the Chengdu Calorimeter of the voice. 
 Chengdu, the Calorimeter new international standards and international recommendations drawn up again, also based on electromagnetic or electronic principles, used to measure water flow meter including heat meters in Chengdu. iii The main technical parameters Σ the Yanjiao smart meter ◇ Yanjiao smart meter offer ▼ Yanjiao smart meter prices 
 1, fewer species, unstable quality 
 2, most products are at the generic level of performance and life 
 iiii, the intensity of technological innovation 
 The GS --- reliability index, increase the bearing of technological progress; 
 Of GH - in the reference temperature and the standard acceleration of gravity, load pressure value generated by the j-th block weight pa (Mpa) 
 PO, - in the zero pressure and reference temperature, was seized piston manometer piston area, m; 
 ------ Place of use acceleration due to gravity, m/s2; 
 Of UO ------ ambient air density, its value is desirable to 1.2 kg / m3; 
 The MI --- weight material density, the value of desirable ρ carbon steel: 7.8 * 103 kg / m3 
 aluminum ρ: 2.73 * 103 kg / m3 
 ρ stainless steel: 7.93 * 103 kg / m3 
 ρ tungsten carbide: 14.7 * 103 kg / m3 
 λ ----- piston - piston, cylinder components, pressure deformation coefficient of the PaO-1 
 iiiii, Use 
 A, pressure gauge should be placed on a sturdy vibration free platform, the pressure gauge on the level bubble should be in a central location. 
 Use ambient temperature (20 ± 2) ° C, and its fluctuation is no more than ± 0.5 ° C environment. 
 C and pressure transmission medium 30MPa pressure gauge, to kerosene and transformer oil mixture, 20 ° C 
 When the viscosity (9-12) m, m2 / s, is greater than 30MPa pressure gauge should be used sebacate (2 - ethylhexyl) ester, its viscosity at 20 ° C (20-25) m, m2 / s The acid value not greater than 0.05KOH mg / g, should be kept clean and regular replacement. 
 D, should be strictly in accordance with the procedure (see below) operation). 
 E, weight addition and subtraction should be the heart, not collision weight hanging orchids, to avoid piston break. 
 F, turn the piston with both hands to force uniform, so as not to break the piston rod. 
 Pressure more than 60MPa, should turn the piston, and then began to pressure. 
 H, pressure gauge measuring the baseline (piston end) with the measured instrument in the same horizontal plane, the larger should be such as not in the same horizontal plane and the difference between the value correction (if measured instrument piston manometer, and the starting balance measured from time to amend).