The photoelectric direct reading sensor adopts the principle of photoelectric transmission encoder, and each character wheel is used as one code wheel.
The key technology of photoelectric direct reading sensor is absolute coding: 1. Identify the position of the 10 digits from 0 to 9 on the character wheel by encoding position of the character wheel number, 2.Solve the problem of high-order digital carry reading of two adjacent related words "every 9 over 0", 3.Mechanical and electrical perfect cooperate to each other, and structure innovation for water meter counter.
1.Zero Error: Using the unique coding technology, the sensor directly reads the wheel position of the counter.After decoding, the data is transmitted to the system computer and display the same value as the water meter window shows. Reading difficulties and errors will not caused by time and environment. The system data is exactly the same as the data of basic water meter that is realizing zero error real-time meter reading;
2.Direct Reading Without Power: No need power supply at ordinary times , only need to supply power at the moment when meter reading. Low failure rate and power consumption and long service life;
3.Will Not Affect the Accuracy of Original Meter: The sensor part of the direct reading meter has no mechanical contact with the counter in the water meter, which will not affect the accuracy of original water meter and completely solve the problem about accuracy of direct reading water meter;
4.Electromagnetic Compatibility: EMC testing meets national standards and overcomes the problem of direct reading water meters being affected by external electromagnetic interference. Unaffected by reflow, the electronic module is not in working condition at ordinary times, and it is not affected by whether the system has been powered off, fault or interference or even lightning;
5.Ingress Protection: IP68;
6.Valve Control:Remote valve control(optional).Technical and Parameter:
|Protocol||DL/T645-1997, DL/T645-2007, CJ/T188-2004, ModBus, User Defined |
|Baud Rate ||1200bps,2400bps,4800bps,9600bps and so on|
|Remote Control||Vavle Control(Optional)|
|Working Temperature||Normal:-25ºC~+70ºC, Limited: -40ºC~+80ºC|