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/