pci 5112 is reading 0.2 volts more than the supplied volatge...

[valliappan]

Hai,

  I am using PCI 5112 to acquire a square waveform from a sensor. But the voltage read by the 5112 card is always more than 0.2 to 0.3 volts  than the supplied voltage.

I am doing the self calibration of the 5112 card programmatically at the intialisation of the application.

I acquired the same signal with another PCI 5112 card and that is giving the correct value.

Help me to solve this issue.

Bye,

M.Valliappan.

[lrallen]

Are you seeing an offset or is the ppk value greater?  Is it a new device or have you been using it for a while?  If it is not new, has it ever read the correct voltages.  It may need to be thoroughly calibrated.  Take a look at the attached knowledge base entries and see if the procedure helps.  If this does not work, I would recommend sending the device in for calibration.  Or if you have your own calibration dept, send it to them.  Let me know how it goes.  Thanks and have a great day!

http://digital.ni.com/public.nsf/websearch/82B4D01C82C17D5886256B8000734070?OpenDocument

http://digital.ni.com/public.nsf/websearch/954ADA8EEFC3266D86256FCC008196EE?OpenDocument

Regards,

L. Allen