Scaling coefficients for Accelerometer input.

[Rahul Jain]

hi

im using daq-mx to take accelerometer input.

i want to read the raw data and scale it myslef later.

i want to know what are the scaling co-efficients for the accelerometer input in daq-mx and what is the process of determining them.

thanks.

[jasonv]

If you would just like to scale the accelerometer data yourself, then you can use an voltage task instead of an accelerometer task and then apply the calculations as you prefer.  The accelerometer task obtains scaled voltage data just like the voltage task and performs an additional calculation based on how many volts or millivolts per unit 'g' you specify.  This calculation would just divide the voltage measurement by the volts per g to obtain the measurement in terms of acceleration.

I'm suggesting the voltage task rather than raw data because it would be unneccessarily difficult to manually convert the raw data from codes to volts and then to units acceleration.  You can still scale the raw data yourself by obtaining the calibration constants from your board using the Device Scaling Coefficients property as shown in the following link: http://digital.ni.com/public.nsf/websearch/6BA35B863A52D77586256F94006C8EAC?OpenDocument