Használati útmutató Global Water WL705
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WL705 Ultrasonic Water Level Sensor
01-313 5/4/12.doc
Specifications:
Sensor Range: WL705-003 4” (.33’) - 36” (3’)
WL705-012 4” (.33’) - 144” (12’)
WL705-048 15” (1.25’) - 576” (48’)
Supply Voltage: 10-30VDC (sensitivity reduced below 15 VDC)
Supply Current: 40mA
Averaging Time: 15 seconds
Temperature: -40º to +158º F Output Current:
4mA, maximum distance
20mA, minimum distance
Connections: Brown +15-30VDC
Blue Ground
Green 4-20mA output (WL705-048)
Black 4-20mA output (WL705-012 & WL705-003)
Operation:
The WL705 sensors use ultrasonic sound waves to determine the distance from the face of the sensor
to the surface of the water by timing how long it takes the signal to return. An internal temperature
sensor automatically compensates for the temperature related variation in the speed of sound and a 15-
second averaging time reduces the affects of turbulence in the water. Note that the sensor must be
powered for 15 seconds for the output to stabilize.
WL705
-012/003
WL705
-048
WL705 Ultrasonic Water Level Sensor
01-313 5/4/12.doc
Calibration:
The calibration procedures for recording devices vary. The process requires knowing the output
current from the sensor at two different distances, as well as the distance from the sensor to the bottom
of the reservoir. The sensor’s output current increases as the distance between it and the target gets
shorter. Thus, the current is lowest when the water level is zero. Due to the difficulty in calibrating
the recording device with actual water levels, a hand held target may be used or the sensor signal can
be reflected off a solid flat object at known distances. Measuring the current at two different distances
within the range of the sensor would be one calibration method. Divide the difference in the two
currents by the difference in distance to get the amount of current per unit of length. Mount the sensor
at a distance from the bottom that gives a zero depth reading. The 12º width of the beam means the
size of the “spot” on the surface of the water gets bigger at greater distances. Maximum accuracy is
attained by insuring that the beam hits a flat surface at all times, best achieved by mounting the sensor
as close as possible to the surface of the water without exceeding the measurement range.
LED Functions:
Round LED Displays “Green” when target is sensed, “Red” when target not
found/not sensed.
Square LED WL705-003 - Illuminates “Green” when target is sensed and is within
the min and max range (4” – 36”)
WL705-012 - Illuminates “Green” when target is sensed and is within
the min and max range (4” – 144”)
WL705-048 - Illuminates “Green” when target is sensed but shorter than
the minimum distance sensor (<15”)
Rectangular LED WL705-003 - Illuminates “Green” when target is sensed and is within
the min and max range (4” – 36”)
WL705-012 - Illuminates “Green” when target is sensed and is within
the min and max range (4” – 144”)
WL705-048 - Illuminates “Green” when target is sensed but farther than
the maximum distance for the sensor (>48’ or 576”).
Termékspecifikációk
| Márka: | Global Water |
| Kategória: | nincs kategorizálva |
| Modell: | WL705 |
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