1122 -1322 to aquire 0-1.5v input. my readings are not accurate

[gegrc]

 I am using a 1122 scxi board with a 1322 terminal block to read voltage from several RO105 temperature sensors.  i see a +- .080v 50hz osc on the voltage reading.  Any suggestion ?

[AnalogKid2DigitalMan]

50Hz, sounds like you are picking up noise from the AC power mains. In your location is the power line frequency 50Hz?

[gegrc]

that was my first thought, I connected everything thru a isolation trans an all my signals re shielded

[TheWoost]

Hi,

Have you tried configuring the device to use the 4Hz filter?  The filters of this device are used to eliminate noise introduced by the isolation amplifier.  The manual for the 1122 also indicates the following on page 4-4:
"To achieve 50 or 60 Hz rejection, you should acquire data over an integral number of power line cycles, then average this data."

Regards,
Andrew W
National Instruments