WL-1A1WL-1A1 Ultrasonic Flow Meter Open Channel Flow Meter Detailed Information on Ultrasonic Open Channel Flow Meter:

1. Flow range: 10 liters/second to 10 cubic meters/second (determined by the type and specifications of the measuring weir used)
2. Accumulated traffic: 8-bit decimal number, automatically returns to zero after accumulating 8 digits, recalculated
3. Flow accuracy: ± 5% (with an uncertainty of 1-3% for the water measuring weir, plus an additional 1-2% instrument measurement error)
4. Ranging range: 0.4-2 meters (within 0.4 meters from the bottom of the probe is a blind spot, and within 0.4-2 meters is the ranging range)
5. Distance measurement accuracy: ± 3mm (calibrated within a 1-meter range)
6. Liquid level resolution: 1mm
7. Working environment temperature: -20~55 ℃
(When powered by AC and equipped with additional self heating in the instrument, it can be: -35~55 ℃, and the additional self heating should be declared at the time of ordering)
8. Instrument protection level: Instrument display part: IP66 (the wire hole at the bottom of the instrument should be blocked); Probe part: IP68
9. Power supply:
AC power supply: 220V ± 10% 6W (26W when using instrument self tracing)
DC power supply: 12V ± 2V 120mA (when powered by DC, the instrument does not have 4-20mA output and the relay is not activated)
When AC and DC power supply coexist, the instrument uses AC power supply; AC power failure automatically connects to DC.
10. Timing error of instrument calendar clock:<5 minutes/month
11. Storage capacity of instrument data:
Monthly, daily, and hourly records: only record traffic for more than 2 years, with additional instruments for 4 channels for more than 4 months
Record per minute: only record flow>8 hours, additional instruments 4 channels>4 hours
12. 4-20mA current connected to other instruments:
Internal sampling resistance of the instrument: 200 Ω; Negative terminal and instrument ground terminal are connected together
Number of accessible channels: I1, I2, I3, I4, totaling 4 channels
13. Compatible printers: interface socket, DB25 jack
When set to "print records": EPSON compatible (recommended to use TP - μ p40T)
When set to "timed printing": only TP - μ p40T (requires the Chinese character library in the printer)
14. 4-20mA current output:
External load resistance: 0-500 Ω
Error: 0.5% (relative to instrument reading)
The negative terminal is connected to the instrument ground terminal (can be changed to suspended ground output according to application requirements)
Output content: optional flow rate and liquid level
15. RS232: interface socket, DB9 pin
Encoding method: 1 start bit, 8 data bits, 1 stop bit, with parity or no parity bit
Baud rate: 30060012002400480096001440019200288004320057600 optional
Communication protocols: Yiwen, Jinyuan, Xijiao, Jiubo, etc. (see Chapter 10, Section 10 "Remote Communication")
16. Relay:
Control mode: Close once per cumulative set m3, liquid level alarm, liquid level upper limit, liquid level lower limit optional
Type: Single blade double throw (normally open, normally closed)
Contact capacity: AC250V 1A; DC30V 1A