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Hi,
I am using a CR1000 with a W200P (and other instruments) and it gives a wind direction, but the wind direction is wrong. It is not my own W200P and I don't have access to it right now, but because it was calibrated by a campbell scientific employee about a month a go, I think it should be correct aligned to true north.
Before it was connected to a CR10X and was giving the correct wind direction (I assume). To use it with a CR1000 I used ShortCut to create a suitable logger program. And as mentioned it works and gives values. But for example for today a nearby weather station gives a wind direction of 75 degrees, while the W200P gives about 30 degrees. A few days ago it was 260 degrees on the other station while the W200P showed 57 degrees.
The code from the old Edlog program for the wind direction looks as follows:

79: 16: Excite-Delay (SE) (P4)
80: 1: 1 Reps
81: 2: 15 
82: 3: 12 SE Channel
83: 4: 3 Excite all reps w/Exchan 3
84: 5: 2 Delay (0.01 sec units)
85: 6: 2500 mV Excitation
86: 7: 91 Loc [ V1 ]
87: 8: 1 Multiplier
88: 9: 0.0000 Offset
89: 
90: 17: Z=X-Y (P35)
91: 1: 91 X Loc [ V1 ]
92: 2: 92 Y Loc [ V2 ]
93: 3: 93 Z Loc [ V1_V2 ]
94: 
95: 18: Z=X*F (P37)
96: 1: 92 X Loc [ V2 ]
97: 2: -2 F
98: 3: 94 Z Loc [ Vx_2_V2 ]
99: 
100: 19: Z=X+F (P34)
101: 1: 94 X Loc [ Vx_2_V2 ]
102: 2: 2500 F
103: 3: 94 Z Loc [ Vx_2_V2 ]
104: 
105: 20: Z=X/Y (P38)
106: 1: 93 X Loc [ V1_V2 ]
107: 2: 94 Y Loc [ Vx_2_V2 ]
108: 3: 72 Z Loc [ 1s_WD ]
109: 
110: 21: Z=X*F (P37)
111: 1: 72 X Loc [ 1s_WD ]
112: 2: 360 F
113: 3: 72 Z Loc [ 1s_WD ]
114: 
115: 22: If (X<=>F) (P89)
116: 1: 72 X Loc [ 1s_WD ]
117: 2: 4 <
118: 3: 0.1 F
119: 4: 30 Then Do
120: 
121: 23: Z=F x 10^n (P30)
122: 1: 360 F
123: 2: 0 n, Exponent of 10
124: 3: 72 Z Loc [ 1s_WD ]

The code for the CR1000 coming from Shortcut looks like this:

BrHalf(WindDir,1,mV2500,2,1,1,2500,False,20000,_60Hz,357,0)

As far as I understand the Edlog code, it does some sort of conversion with a second rep of the BRHalf (which the CR1000 code does not) and that results in the wind direction. The wiring on the CR10X also had a resistor between "V1" and "V2". The CR1000 wiring coming from Shortcut does not have a resistor and is only using a single BRHalf on a single ended connection.

Does anyone has an idea what the problem could be? I will be at the logger again tomorrow to check the wiring on the logger, but I am really sure it is correct.

Thanks,
Kjell

One common problem with that sensor is that the Windvane is not pushed down properly.   It should click and this locks the vane to the shaft of the potentiometer.    If this has not happened it can rotate without turning the potentiometer and even blow off at high windspeed.   I would check this out if you do not have a consistent error to a reference.