range 9219

[RyanWu]

Hi,

    What is the best (most accurate) measurement range of 9219. I plan to use a thermistor with 9219 to measure temperature. The thermistors has different resistance selections. I want to choose the type which matches the 9219. At what resistance range the 9219 read the most accurate reading (smallest percentage of error)?

Thanks,

ryan

[Margaret F.]

Hi Ryan,

I think what we need to consider here is not so much the resistance of the thermistor, but rather how that resistance will affect the voltage range. The 9219 has different voltage ranges from 125mV to 60V. You will need to choose a current and a resistance that takes full advantage of one of those ranges to get the best meausurement. So, just applying the old V=IR should do it!

Hope this helps!

[JamesBeams]

Ryan,

You may also want to review the NI 9219 module specificaions here: 9219 Specifications

10k and 1k 4- and 2- wire resistance gain error is 0.1% typical/0.5% max.

[RyanWu]

Thanks. Your field engineer loaned me one and I am testing it right now.

Ryan