Hi all
I’m trying to read Windir and Winspeed from a “Wind Monitor model 05103-45-5”. The Windir is OK, and I get Winspeed readings, but the problem happens when I try to turn the propeller faster. The Winspeed never increases more than 10 m/s.
¿Sould be higher the windspeed?
I tried in two different dataloggers, CR1000 and CR3000, and in different pulseports. But same problem is remaining.
I check the program code, and multiplier applied, and all looks right.
Code:
• “PulseCount(WS_ms,1,PulseChanel_1,Lowlevel_AC,Frecuency_Counts,Multiplier,Offset)
• PulseCount(WS_ms,1,1,1,1,0.098,0)”
¿Someone has had the same problem?
It sounds like you are trying to spin the propeller by hand. Test the sensor out in the wind. The wind monitors have a high rpm/wind speed ratio. 10m/s is around 2000 rpm. It is hard to spin the prop that fast by hand, especially since you have to maintain that speed for your scan interval.
Test the sensor in wind.
Hello,
We have a 05106 marine wind sensor and are using a wireless sensor to transmit the wind data to our CR1000 in an enclosure about 200 ft away. While the direction is good, it seems that the wind speed is rather low (about 3-4 times lower) than surrounding weather stations are reporting and real wind conditions appear to be. The sensor rarely goes above 15 knots, but there has been a consistent wind that has been greater than 20 knots. The wind sensor is 40ft high and clear of any structures that may interfere with the speed measurement.
This is the first time we have used a wireless sensor and I noticed that the wind speed is measured as wind speed average (WSA). Could this be the reason for the depressed wind speed? Is there a way to measure instantaneous wind speed with the wireless sensor instead of an average? I've copied the program we have for our wireless sensor below and the program for one of our other weather stations where we are not using a wireless sensor.
I would like the wireless sensor to collect similar data to the non-wireless sensor stations, which I believe are instantaneous wind speed readings.
Thank you very much!
Wireless Wind Sensor
'Define Data Tables
DataTable(Table_1Min,True,1000)
DataInterval(0,1,Min,10)
Sample (1,StationID,FP2)
Sample(1,BattV,FP2)
Sample(1,AirTC,FP2)
Sample(1,RH,FP2)
Sample(1,BP_inHg,FP2)
'Sample(1,WS_knot,FP2)
'Sample(1,WindDir,FP2)
Sample(1,CWSArray(ArrayIndex("CWS900_1_WSA")),FP2)
FieldNames("WS_knot")
Sample(1,CWSArray(ArrayIndex("CWS900_1_WDA")),FP2)
FieldNames("WindDir")
Sample(1,SlrkW,FP2)
Sample(1,PAR_Den,FP2)
Totalize(1,Rain_mm,FP2,False)
EndTable
'Main Program
BeginProg
Scan(60,Sec,0,0)
.....
If WindDir>=360 Then WindDir=0
If WindDir<0 Then WindDir=0
CWB100(3,CWSArray())
WS_Knot=CWSArray(ArrayIndex("CWS900_1_WSA"))*1.9438449
WindDir=CWSArray(ArrayIndex("CWS900_1_WDA"))
Non-Wireless Wind Sensor
'Define Data Tables
DataTable(Table_1Min,True,-1)
DataInterval(0,1,Min,0)
Sample (1,StationID,FP2)
Sample(1,BattV,FP2)
Sample(1,AirTC,FP2)
Sample(1,RH,FP2)
Sample(1,BP_inHg,FP2)
Sample(1,WS_knot,FP2)
Sample(1,WindDir,FP2)
Sample(1,SlrkW,FP2)
Sample(1,PAR_Den,FP2)
Totalize(1,Rain_mm,FP2,False)
EndTable
'Main Program
BeginProg
Scan(1,Sec,1,0)
'05106 Wind Speed & Direction Sensor measurements WS_knot and WindDir S/N 107852
PulseCount(WS_knot,1,2,1,1,0.1904,0)
BrHalf(WindDir,1,mV2500,4,1,1,2500,True,0,_60Hz,355,0)
If WindDir>=360 Then WindDir=0
If WindDir<0 Then WindDir=0