I. Product Overview YJLX type Passive Optical Direct Reading remote meter is my company through the use of advanced non-contact optoelectronic devices and new reliable coding identification methods and developed a new product, the electronic meter reading and water represents a number synchronization, to overcome the other direct-reading meter does not recognize the word wheel carry problems, high reliability of reading greatly improve the efficiency of water supply enterprises, residential property management departments, reduce management costs, effective solution to manual meter reading inefficient, error and more difficult issues such as the door. The kind of water that has reliable, accurate measurement, stable performance, ease of operation and other features make it become the mainstream market. This type of water meter in line with GB / T778.1 ~ 3-2007 "Measurement of water flow in closed conduits cold potable water and hot water", CJ / T224-2012 "electronic remote meter" and CJ266-2008 "drinking cold water water safety rules "standard. Second, the main features 1, meter accuracy using optical direct-reading technology directly read the meter "window value" to reduce the points of failure in terms of accumulated pulses, no cumulative error, direct-reading meter electronic parts and table counter, without mechanical contact within the device, causing the error without jitter; meter infrared photoelectric direct reading mode, without interference from electromagnetic interference and light. 2 various parameters directly read the meter "window value" when the meter reading meter reading convenience need to set the base table, table constants, etc., without having to store data, convenient and practical. 3, low-power "can save" their daily work without power, direct-reading device is powered only work when the meter reading to avoid measurement error due to the power supply is unstable, unreliable or malfunction and cause a lot of maintenance. 4, lightning and other security features inside this type of meter adds specialized lightning circuit, reliability is greatly enhanced; and because the electronics within the table usually does not work, isolation, electromagnetic interference from the outside world, nor Other weak systems interfere greatly hinders electromagnetic interference. 5, user-friendly query function of the water meter special M-BUS master card inquiry have each user with the user's query card can check their own meter readings (each up to 3 meter) on the M-BUS master, When the brush for cards, sequentially displaying the house number, table number and the word wheel indication on the LCD screen. 6, system engineering, installation easy and low maintenance, low cost using the M-BUS bus mode, the tree structure to facilitate the construction and maintenance. Common two-wire connection, does not distinguish between positive and negative polarity, while providing complete data communications and power meter function. System does not require long-term supply, no backup battery, no power when not working, and therefore low maintenance and low cost. 7, can be used between the meter reading meter reading system flexibility and M-BUS master RS485 wired networking, GPRS wireless transmission and infrared meter reading meter reading meter reading way. 8, infrared meter reading function management available infrared meter reading Beater Smart M-BUS terminal block under a meter of water, can also be copied from all meters of water consumption Smart M-BUS data terminal is connected, then the data Import Management software on your computer. 10, remote control functionality through management software, management can a piece of the water meter remote control system for remote forcibly open the valve, close the valve; administration can also produce a piece of water forced open valve on the card or force management software off valve is stuck, then the smart meter M-BUS terminal to forcibly open the valve, close the valve, so that management easier to achieve control of the water meter. (With VRLA function meter) 11, stepped price function of the meter functions to achieve the price ladder by management system to facilitate property management, water conservation, to avoid wasting water. Third, the basic parameters of nominal diameter DN15 DN20 DN25 measurement level 2 2 2 range ratio (Q3 / Q1) 80 80 80 maximum flow rate (Q4) 3m3 / h 5m3 / h 7m3 / h common flow (Q3) 2.5m3 / h 4m3 / h 6.3m3 / h transitional flow (Q2) 0.05m3 / h 0.08m3 / h 0.126m3 / h minimum flow (Q1) 0.0313m3 / h 0.05m3 / h 0.0788m3 / h Overall dimension (with VRLA) 165mm × 90mm × 120mm 195mm × 90mm × 120mm 225mm × 90mm × 120mm Dimensions (without VRLA) 165mm × 88mm × 125mm 195mm × 88mm × 125mm 225mm × 88mm × 125mm connecting thread D: R1 / 2B D: G3 / 4B D: R3 / 4B D: G1B D: R1B D: G5 / 4B operating temperature 0.1 ℃ -30 ℃ Working pressure 0.03MPa-1.0MPa E1 grade level electromagnetic compatibility