SCXI-1122 Measurement declines linearly

[ToddT]

I am measuring pressures with SCXI-1122. The range is 0-100psi and the measurement is 1-5Vdc. When the measuring begins, the voltage is high, but devreases at about a rate of 1V/s. Does anyone know why and the solution?

[Bill B]

Hello,

Thank you for contacting National Instruments.

If your voltage starts out at 5V and then decays slowly to -5V or appears to float around, it is likely, that you either do not have your pressure sensor connected correctly or your SCXI-1122 is not configured correctly.

The SCXI-1122 is a multipurpose isolated input module which can have its channels configured in many different measurement configurations. It is critical that you ensure that the jumpers inside the module are setup correctly and match your configuration in software. Please click here to read the SCXI-1122 User Manual. This manual will show you how to properly connect yo
ur signals and also how to configure the jumpers of the module correctly.

Regards,
Bill B
Applications Engineer