Technical Indicators of Photoelectric AMR Water Meter
1. Relative
Error:
Water Temperature ≦30℃, Max permissible error in low flow rate area is ±5%; Max permissible error in high
flow area is ±2%.
Water Temperature >30℃, Max permissible error in low flow rate area is ±5%; Max permissible error in high
flow area is ±3%.
2. Temperaturte Class: (0.1～30)℃ for chilled water meter; (0.1～90)℃ for hot water meter
3. Working
Pressure: ≤1.0MPa
4. Pressure
Loss：≤0.063MPa(DN15-40); ≤0.025MPa(DN50-300).
5. Installation
Environment：Class B(DN15-40); Class C (DN50-300).
Note：Water meters with electronic devices
can be devided into 3 levels according to the
climatic and mechanical environment condition:
- Class B: Fixed water meter installed indoor
- Class C: Fixed water meter installed
outdoor
- Class I: Portable water meter
6. Electromagnetic
Environment：E1-Residential, Commercial and Industrial.
Note: Water meters with electronic devices
can be devided into 2 levels as far as
electromagnetic environment concerned:
-E1 level: Residential, Commercial and
Light Industrial
-E2 level: Industrial
7. Operating Voltage: DC（24-36）V (M-Bus interface); DC 9-24V(RS485 interface)；
8.
Working current: Static working current ≤1.5 mA, Meter reading working current ≤10mA(M-bus interface);
Static working current ≤1.0 mA, Meter reading working current ≤5mA(RS485 interface);
9. Method used to communicate the with server(data center):
M-Bus field bus or RS485 bus；
10. Communication transmission rate: 1200/2400/4800/9600bps;
11. Max communication transmission cable range:
300m;
12. Communication protocol: Modbus-RTU,
DLT645, 188 protocol as well as internal self-defined protocol
13. Short-circuit current limitation.
14. Protection against Short-circuit malfunction.
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