? The ☆ Tunchang card meter № Tunchang card meter offer № the Tunchang card meter price ★ 
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 The Tunchang card meter ☆: 
 Our R & D production of Tunchang card meter, based on RF card as media, all kinds of information in the form of an induction input to the control CPU the Tunchang card meter, the Tunchang card meter to automatically open the valve the amount of water purchased by the user 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) Tunchang card meter will automatically its electric valve Close Users only need to purchase water into Tunchang card write credit card water meter sensing area to sense look at the the Tunchang card meter, electric valve to re-open the remaining water (ie, the Tunchang card meter less than 5m3 to the exhaustion of this period of time, the Tunchang card meter five times without water, to remind the user to purchase water). To the the Tunchang credit card when the exhaustion of the remaining water within the water meter, not the purchase of water and write Tunchang card meter motorized valve will close until the user to purchase water and write Tunchang credit card meter so far. In order to achieve the first to buy the water, the purpose of water ". 
 ? Tunchang card water meter is exhausted in the remaining water and electric valve is closed, for some reason (such as electric valve internal leak, etc.) water by the Tunchang card meter the Tunchang card meter will continue to be measured, the number counted as negative values, when the users to purchase water and write Tunchang card meter, the Tunchang card meter will first deduct the negative values ??(ie, the first overdevelopment of water), if the amount of water newly written enough deductible super negative values ??of the water, the the Tunchang card water meter within the electric valve does not open and continue to be closed until Tunchang card the remaining amount of water in the meter 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 be induced to purchase water card to (sensing area), you can own the electric valve is opened and Tunchang card 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). Both do their own ability to lift the the Tunchang card meter of the assault, but also to limit the behavior so that it can not indefinitely Tunchang card meter man-made attack. The Company produced than other Tunchang credit card more than a meter each presented two of the company's trademark and warnings tamper shrink film, installation, pre-set into to take over, Tunchang card water meter installed and leak testing and qualified, tamper shrink film set in the the Tunchang card meter to take over the 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 carriers, electronic 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 measurement display using electronic and LCD Dual Display does not affect the the Tunchang credit card verification and calibration of the meter accuracy; h, the overall closed-shell design, anti-attack, waterproof, moisture, fumes, anti-knocking; i read and write cards of the sale of water 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 Tunchang card meter and line marked CJ/T133-2006 Tunchang card water meter standards. 
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 ? A, Hui Yi brand Tunchang card meter Introduction Tunchang card meter defects in recent years, credit card meter for ordinary Tunchang 8L / H) not measured in small flows (less than developed. Tunchang ordinary credit card water meter due to the movement of the rotating parts and count the gear inertia, so in the measurement process if the water flow to a certain extent will not be able to promote the movement of the impeller and counter gear, thus the micro flow can not be measured at less than the starting flow of this drip, people can adopt to make the the Tunchang card meter not measured to obtain the water tube online, so that the water supply enterprises suffered losses. To solve this problem, Beijing Hui Yi has developed a pressure difference integral anti-drip the Tunchang card meter, simply just do not change the the Tunchang card ahead of the meter movement in drip drop out of the water first accumulate when the save suddenly promoted a certain amount to Tunchang card meter rotating impeller to achieve drip measurement purposes 
 ? Second, the product uses and characteristics: This series of the Tunchang card water meter for the total amount of the high sensitivity to flows through the tube drinking water, its main features are as follows: 1, the smaller the initial flow rate, the initial flow rate of less than 0.5L / h; ordinary Tunchang credit card 16 times the 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 anti drip institutions do not will be clogged by impurities in the water or get stuck; 3, anti-slip performance: general movement velocity, not idling, soft diaphragm can offset part of the water hammer pressure, coupled with anti-drip closure of the institution, so the anti- creep performance far superior to the jet and C-level anti-drip Tunchang card meter; 4, 0.5L / h to 14L / h under the micro-flow state for the intermittent measurement (like displacement Tunchang card meter) and micro-flow range measurement error is small; authoritative experts, convened by the Ministry of Construction and the China Water Association, our identification of 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 
 ? Beijing Hui Yi Tunchang card of all members of the Water Meter Co., Ltd. sincerely welcome you to Beijing Hui Yi Tunchang card meter factory guidance inspected! 
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