accell returning large numbers

[Vkerkez]

Hello,

We currently have a box that returns seismic data using the accelerometor. The problem with the data is that the numbers returned are way to big.

Sometimes it returns G's in the thousands.

DAQmxCreateAICurrentChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 shuntResistorLoc, float64 extShuntResistorVal, const char customScaleName[]);

I know in the create ai channel function we can set the sensitivity. If I mess around and change the number... the machine just hangs and stops collecting data.

We also tried to change it from miliVolts to just Volts. Again the card will just hang and not collect data.

How can we change it so that the returning data points are set in g's?

thank you so much,

-vladimir 

[Henrik_Volkers]

What DAQ are you using?

Max available?

How is the setup?

coarse spec of accelerometer?

[Vkerkez]

We are using the pci 4462 card. The code is written in DAQ and ANSI C. We are using the most recent compatible version of the DAQ for linux. 

The setup is our linux box with the card attached to accelerometor collecting all the data. Except the data is huge.

We made sure the calibrate the sensors still no luck.

thanks for the help guys,

-vlad 

[Vkerkez]

The sensor we are using is  Wilcoxon Research Model 731-207 Ultra low frequency seismic accelerometer. It came calibrated. 

The voltage on it is 10 V/g for sensor sensitivity. 

[Scott-M]

Hi Vkerkez,

You may want to try running a test panel in Measurement & Automation Explorer, this would allow you to look at the raw data and should help isolate where the issue is coming from.

Let us know what you find.

Thanks

Scott M.