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Measuring Low Frequencies with LabVIEW and FieldPoint Using [c]FP-CTR-500/502

I am trying to use this example in a LabView 8.0 and a Field Point FP-CTR-502 module but without any sensor I get frequency and period values.

Is that possible to use this example with LabView 8.0 or not?

I am trying to use an anemometer Campbel Scientific A100R.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3ED7556A4E034080020E74861&p_node=174404&p_source=External

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Message 1 of 11
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 What frequency do you obtain? it could be a noise.

If you connect a referenced signal, do you have these values?

Message Edité par ManuelR le 07-06-2006 04:49 AM

Manuel R
AE dans une autre vie
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Message 2 of 11
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No... that is not noise. Even when I shortcut direct in the FP terminals I get random values in the frequency. I made the configuration for FP several times to confirm if there were something wrong but nothing works
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Message 3 of 11
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Sounds like it could be a floating common/ground loop problem. Are all you negatives connected to the same ground point (including the power supply common)?
 
Steve
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Message 4 of 11
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I am sure this is not an electrical problem. Even in the laboratory the displayed data are wrong. We had this anemometer pluged in a weather station an its is working well. Did you tested this program too?
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Message 5 of 11
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Did you tried with Measurement and Automation Explorer?

How do you connect the anemometer to your FP? differential mode? RSE? NRSE?

 

Manuel R
AE dans une autre vie
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Message 6 of 11
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I realy dont know... what does it means... is supposed to know all this to connect a simple anemometer?

The anemometer acts like a little switch, switching on and off for each revolution.
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Message 7 of 11
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You can launch MAX from start\programs\National Instruments\Measurement & automation.

Concerning source signal wiring, you can have a look to the following link : http://zone.ni.com/devzone/conceptd.nsf/webmain/01F147E156A1BE15862568650057DF15?opendocument

Hope this helps,

Manuel R
AE dans une autre vie
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Message 8 of 11
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Hello,

Is your problem solved?

Do you need more help?

 

Manuel R
AE dans une autre vie
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Message 9 of 11
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No, my problem is not solved yet... Smiley Sad

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Message 10 of 11
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