DAQmx NI 9219 RTD Excitation Current

[stacey54]

I'm curious whether there is a limit to the excitation current for NI 9219.  I am trying to use an Omega RTD, which requires a 1 mA excitation.  When setting excitation in Labview or NI Max, it gives an error, forcing excitation level to 0.5 mA.  The temperature amplitude is then -410 when degrees F is chosen with the 0.5 mA excitation.  Any thoughts on how to solve this?

[stacey54]

Now getting good temperature measurements by wiring the 4 wire RTD as 3 wire, combining the excitation + and high wires in the excitation terminal.