? ☆ Shandong RF water meter № Shandong RF water meter offer № Shandong RF meter price ★ 
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 Shandong RF meter ☆: 
 Our R & D production in Shandong RF water meter, RF card as the media will be all kinds of information in the form of an induction input to the Shandong RF meter control the CPU, the Shandong RF water meter the amount of water purchased by the user automatically open valve water supply, when the surplus water to less than 5m3 (including 5m3) but have not yet exhausted, and every integer (for example, the remaining water to 4m3, 3m3, 2m3, 1m3) Shandong RF meter will automatically its electric valve Close Users only need to purchase water used to write into the of Shandong RF meter card "sensing area to sense the RF water meter within the Shandong Electric valve will re-open the remaining water (ie, within the of Shandong RF water meter less than 5m3 to exhaustion this time, the Shandong RF meter five times without water way to remind users to purchase water). To Shandong radio frequency water meters within the remaining water is exhausted, the users do not purchase water and write Shandong RF meter, the electric valve will close until the user to purchase water and write Shandong RF water meter within the date. In order to achieve the first to buy the water, the purpose of water ". 
 ? When Shandong RF water meter is exhausted in the remaining water and electric valve is closed, for some reason (such as electric valve internal leakage) flow through the Shandong RF meter, Shandong RF water meter will continue to be measured, the number counted as negative values, when the users to purchase water and write Shandong RF water meter, the the Shandong RF meter will first deducting the negative values ??(ie, the first overdevelopment of water), water newly written enough deductible super negative values ??of the water, Shandong RF water meter, electric valve does not open remain closed until the water remaining within the of Shandong RF water meter is positive so far. When the Company suffered such as magnetic and other external attacks, within one minute inside the electric valve shut down. At this point, the user can purchase water card to (sensing area) induction can own electric valve open and the Shandong RF meter work properly. However, if such an attack accumulated more than 10 times more users to purchase water card will no longer be able to open its electric valve (in case the user man-made attack), high a check card (water management The department only holds) to the electric valve is opened, the same time attack record clear (after the user configuration of the water cards but also because of the attack and then open the 10th). Enabling it to achieve self-lifting of Shandong RF water meter attack ability, but also limit the behavior that it can not indefinitely Shandong RF meter man-made attack. The Company produced more than other of Shandong RF water meter each presented two of the company's trademark and warnings tamper shrink film, installation, on its pre-set into the receiver, Shandong, RF water meter installed and leak testing after passing tamper shrink film set to take over in of Shandong RF meter nut, and then use a hair dryer (1600w high heat hair dryer) at the shrink film at the blow tamper or above 90 ℃ hot water alignment tamper Pour of shrink film, shrink film shrink while the nut take over the shape of the hoop tight. To split the table must be tamper destruction of heat shrinkable film, thus preventing the artificially split the table for the purpose of stealing water. In addition to the above characteristics, the product, the following characteristics: (a) non-contact (RF card) information carrier, no mechanical wear, fast transmission of information, confidentiality and anti-attack performance, high reliability; (b) with LCD display the total quantities of water purchased, and the remaining water and all kinds of information; when the remaining water is zero or alarm value, automatically close the valve without water; d the entire system is usually in the off state, static power consumption is zero; (e) electric control valve patented electric valve to completely overcome the electromagnetic valve interference and shutdown lax defects; f unique anti-theft of water, tamper table, anti-reversal device; g metering display by mechanical and LCD Dual Display , which does not affect the test and calibration of the RF meter accuracy in Shandong; h. overall closed-shell design, anti-attack, waterproof, moisture, fumes, anti-knocking; i the sale of water to read and write card management unit may be used alone , but also with computer networking. The company produces technical parameters are as follows: Working power supply: two 3.6V lithium battery, the working life of 8-10 years; (b) usually work current: 0A; c instantaneous operating current :1-5MA; d. RF card Life time:> 100 000; (e) Working pressure: 1MPa below normal work; (f) the operating temperature range (temperature) :0.3-40 ° C; g. the whole life of 8-10 years. This product complies with the GB GB/T778-1996 cold water Shandong RF water meter and line the standard CJ/T133-2006 Shandong RF meter standard. 
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 ? A, Hui Yi brand Shandong, Shandong RF type meter RF water meter in recent years for ordinary Shandong RF water meter in the tiny flow (less than 8L / H) the development of non-quantified defect. Ordinary Shandong RF water meter due to the movement of the rotating parts and count the gear inertia, so in the measurement process, if the water flow is small to a certain degree will not be able to promote the movement of the impeller and counter gear, thus the micro flow can not be measured at people less than the starting flow of this drip Shandong RF meter not measured to obtain the water of the RF tube online, so that the water supply enterprises have suffered losses. To solve this problem, Beijing Hui Yi has developed a differential pressure integral anti-drip Shandong RF water meter, simply means do not change the the Shandong RF meter movement in advance, the drop out of the water in drip first accumulate when the save a certain amount of a sudden promote Shandong RF meter impeller rotation to achieve the purpose of drip measurement 
 ? Two, the product uses and characteristics: This series of the RF water meter for the total amount of the high sensitivity of flowing through the RF pipe drinking water, its main features are as follows: 1, the smaller the initial flow rate, the initial flow rate is less than 0.5 L / h; more than 16 times the ordinary Shandong RF meter; 2, adaptability to water quality: due to the drainage channel between the anti-drip institutions and outlet distance of 4mm, so by particles below 4mm, so that the anti-drip institutions not by impurities in the water is clogged or stuck; 3, anti-slip performance: ordinary movement is the flow rate, not idling, soft diaphragm can offset part of the water hammer pressure, coupled with anti-drip closure of the institutions, so the The anti-creep performance is far superior to the jet and the C-class anti-drip Shandong RF meter; 4, in the 0.5L / h to 14L / h under the micro-flow state for the intermittent measurement (like displacement Shandong RF water meter ), and micro-flow range measurement error is smaller; 5, of the authority of experts convened by the Ministry of Construction and the China Water Association to identify the products and technologies, and its technology has reached domestic leading level. Can guarantee the normal work for more than 10 years of anti-drip institutions. Conditions of use: the work of the water temperature does not exceed 40 ℃, working pressure is not greater than 1Mpa. Four, show error: less than the minimum flow (Qmin) of the trace does not count; from including minimum flow (Qmin) to but excluding the boundaries of flow (Qt) of low district: ± 5%; from including the boundaries of flow (the Qt) to include overload In the upper zone of the flow (Qmax): ± 2%. Pressure loss: △ ≤ 0.1Mpa 
 ? All the members of the Hui Yi Shandong RF meter Co., Ltd. sincerely welcome you to Beijing Hui Yi Shandong RF meter factory guidance visits! 
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