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The calibration data is stored in a U32 array, though each Offset field 
should be interpreted as a signed value.

The NI 9219 returns calibrated 24-bit (padded to 32-bits) AI data for all 
modes and ranges.

To convert raw data into engineering units use the following formula: 

y = m*x + b

•

b = offset based on range of the device (such as, –60 for ± 60 Volts 
Voltage Measurement Range)

•

m = Gain (Full-Range/ (2

24

)): (such as, 120/(2

24

) for ± 60 Volts Voltage 

Measurement Range)

14

3-Wire RTD

Pt1000

15

Pt100

16

Quarter-Bridge

350 

Ω

17

120 

Ω

18

Half-Bridge

 ±500 mV/V

19

Reserved

—

20

Full-Bridge

±62.5 mV/V

21

±7.8 mV/V

Table 35.  NI 9219 Calibration Data

LSB Weight

Unsigned

Offset

Signed

Table 34.  NI 9219 Channel Calibration (Continued)