Jan 30 2015

Introduce the relevant knowledge of remote water meter Lightning Protection Technology

1) the system should have internal lightning protection devices, especially in signal acquisition and primary data collector should have better ability to mine, signal collector and the primary collector in using common grounding, grounding resistance should not exceed 1 w, when using special grounding device shall not be more than 4 ω.
(2) the collector and the main signal acquisition devices such as power line power surge arresters, plus signal arrester at the signal input line. Lightning protection measures for the further protection of equipment should be provided plus all technical parameters of SPD to prevent external changes in equipment performance after the SPD, so that system does not work correctly and the meter.

System test method
1) system testing will be necessary before a formal application can complete system testing, also can be partially separate trials.
2) sensor electrical conversion error test. Test results shall meet the requirements, namely, electronic counting signals form the cumulative flow of electronic value and mechanical counting error ≤ ± 1m3 integrated flux value.
3) sensor reliability test of mechanical and electrical conversion. Real-time intelligent remote meter test carried out in a relatively harsh environment you should choose, check the environmental impact on the sensor. Direct reading intelligent fareastone meter tests carry-select at least the wheel under the most unfavourable conditions, such as phases after jumps from 9 to 0, jumping process required less than 3 characters. Read test before and after mechanical readouts and electronic reading and comparing the data to determine its identity and relevance, required reading, not wrong code, garbled text and blind spots, and so on.
4) collector, the collector and the handsheets test. Parameters of testing device functionality, performance, and compliance requirements. Far Eastone Telecommunications testing can be conducted concurrently, terminals use GPRS communication mode, such as CDMA, GSM and telephone lines. Communications should be safe, reliable, accurate and timely data.

5) meter reading cycle of once a day. Recording symptoms, and do analysis. Technical summary of performed on a monthly basis.
6) summary every three months. After one year to undertake a comprehensive analysis and summary inspection system sensor measurement accuracy and reliability, testing system functionality, performance, and whether it meets the requirements of the parameters, the stability of the system to meet the requirements. To determine whether the system can be used.

source:http://www.asmeter.com/

Jan 29 2015

Construction of remote water meter, as well as the installation of ten Essentials

1) selection first take into account water meter, water meter workingenvironment: such as water temperature and the working pressure, workingtime, to select measuring ranges and water quality for water, then pressthrough the flow meter design to produce water pressure loss approach and do not exceed the specified value to determine whether water meters diameter.Under normal circumstances, nominal diameter not greater than DN50, shoulduse the rotary-wing water meter DN50 mm nominal diameter, Woltman type water meter compound in which the very large changes in water flow meter. Interiordesign should be given priority in the use of wet water meter.

2) when, even when water, commonly used in the design flow should be no more than a meter flow to determine the nominal meter diameter. When there is afire flow and flow check is required to ensure that its total traffic does not exceed the maximum flow rate of the meter limit.
Construction of remote water meter and installation requirement
1), the meter should be installed in the convenience of maintenance andreading without exposure, freeze, where pollution and mechanical damage.
2) front end, Woltman type water meter shall have 8~10 times the nominalmeter diameters of straight pipe, and other types of water meter before and after should have a straight pipe of not less than 300mm.
3), rotary wing and horizontal Woltman type water meter water meters should be installed horizontally; horizontal Woltman type cubic meter according to the actual situation determine the horizontal, sloping or verticalinstallation; when mounted vertically, the direction of flow must be from the bottom up.
4), for the unity of life, production and fire water supply system, such aswhen only one service pipe should be around water meters installed bypasspipe.
5 per cent), and bypass pipe should be installed on both before and afterwater meter repair valves, valves should be installed after the water meterand meter discharge device. To reduce head losses and guarantee before thelinear flow of water flow in pipe, valve repair gate valve should be usedbefore the table. Household water meter in residential, table service valveand special discharge device can not be set.
6) should prevent flooding, water wells, and rainwater.
7), the meter should be consistent with its type.
8), inversion, occurred when the meter may affect the measurement, anddamaged when the meter should be set after the water meter check valve.
9), hot and cold water meter installation requirements in addition todifferences in temperature, is basically the same. The maximum operatingtemperature is 110 degrees hot water table. If hot water meter installed infront of the boiler or heat exchanger to prevent reflux, non-return valveshould be set after the water meter.
10), and far biography meter installation has two species way: only up to outdoor copy table role of far biography meter installation more simple, as long as will meter output system and installation Yu outdoor of data displayed device (relay device) connected received can; another a way is will whole floor or whole community of all far biography meter through relay device and network controller connection to community management sector, through terminals for unified management.
Aug 27 2014

Electronic Remote Reading Water Meter principle, structure design, application, maintenance and classification.

Intelligent remote meter is a common signaling electronic acquisition module and the electronic module, signal acquisition, data processing, storage and data through the communication line to upload to the repeater, or handheld meter reading device. The body adopts the integrated design, it can real-time record and save the water used by users, each water meter has a unique code, when the intelligent water meter reading instruction received after immediately the water meter data to management system.

Electronic Remote Reading Water Meter

Remote meter reading system of electronic water meter with automatic meter reading mode to replace the traditional manual meter reading, and compared to similar meter reading system, adaptive, network structure characteristics of simple debugging, stable running, convenient extension.

Main function:

Real-time meter reading function, frozen meter reading, Electronic Remote Reading Water Meter, equipment file management, user file management,

Statistical data analysis, report query and print, operation authority management, payment settlement management, data analysis,

Data backup and recovery.

Typical applications:

Single copy: management center set up reading task, the system can automatically copy specified areas of the water meter data information, automatic meter reading function unattended. At the same time, the system also supports manual meter reading function, can copy meter data.

Single copy + remote control mode: water meter inside with valves, management center can at any time on the water meter remote valve, closing valve control.

Single copy + IC card control mode: in addition to have all the features of single copy mode, water meter with IC card circuit and a valve, may realize the IC card prepayment function. Management through the IC card charging control of water meter.

The main parameters:

Remote meter is a mechanical hot and cold water common basis, constitute a remote transmitting system plus, main control parameters selected for flow meter, commonly used flow, overload flow, minimum flow, transitional flow rate, the nominal pressure, the maximum allowable working pressure, pressure loss.

Selection:

1), water meter selection must first consider the water meter working environment: such as water temperature, working pressure, time, measurement range and the water quality of water were selected, then press through the design of flow meter, water meter pressure loss to produce close to and do not exceed the specified value to determine the water meter diameter. In general, nominal diameter less than DN50, should use the rotor type water meter; nominal diameter is more than DN50, should use the spiral wing type water meter; flow meter should be used when the variation range of compound water meter. Give priority to the wet water meter should be in interior design.

2), when the water is even, should be the common flow design flow does not exceed the water meter to determine the Single Jet Dry Dial Brass AMR Remote Reading Water Meter. When there is a fire flow and the need for calibration of flow rate, maximum flow rate is not more than the total water restrictions.

Application:

In the direct reading remote meter gradually overcome the technology difficulty is big, precision requirements of higher disadvantage entering the mature stage, pulse meter is already in the application specification product reliability, product technology, product in engineering and user recognition and entered the mature period. With the development of automatic meter reading market, pulse type, direct reading remote meter from opposition to unification, from exclusion to be complementary. There will be more and more manufacturers should the market demand, the left hand provides a pulse type, the right hand to provide direct reading. Direct reading water meter and pulse meter will be in for a long period of each share, two of the world, and sharing of automatic meter reading market a better future.

http://www.asmeter.com