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Interference using 05103-45, SMD-INT8 and CSAT3

caioruman Aug 18, 2011 01:51 PM

Hi,

I have 3 wind monitors (05103-45), connected to the datalogger throught SDM-INT8, and one CSAT3. The SDM-INT8 and CSAT3 connect to a CR5000.

I'm having 2 problems:

1) I'm getting interference in the wind speed measurements when the wind monitors are stopped. i.e.: The value of wind speed should be 0, but it shows crazy values.

Without the CSAT3, the interference appears when I measure the wind direction using 60Hz integration. I get no interference using a 250us integration or when I don't use the BrHalf instruction.
Using the CSAT3, I get interference no matter what value I use for the integration. Again, I get no interference whithout BrHalf.

This is what I'm using for the wind direction:
BrHalf (WinDir_A,1,mv5000,23,Vx2,1,5000,True ,0,250,355,0)
BrHalf (WinDir_B,1,mv5000,24,Vx2,1,5000,True ,0,250,355,0)
BrHalf (WinDir_C,1,mv5000,25,Vx2,1,5000,True ,0,250,355,0)

For the wind speed:
SDMINT8 (WS_ms(),2,0000,0222,0000,0222,0,1,98,0)
How do I get rid of the interference?

2) The CSAT3 scans at 10Hz, but the wind monitors scans at a 10sec interval. What is the best way to measure all the instruments?

Thanks,
Caio

* Last updated by: caioruman on 8/18/2011 @ 8:29 AM *

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