National Instruments NI 9144 User Manual - page 69
NI 9144 User Guide and Specifications
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© National Instruments
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69
Use the calibration coefficients with the following equation to generate corrected data:
where
Raw represents raw data returned by the NI 9229/9239
V
corrected
represents the corrected voltage value
NI 9233
As a DSA module, the NI 9233 does not synchronize to other modules and free-runs at its own
fixed rate. The vendor configuration extensions for the NI 9233 are listed in Table 69.
NI 9233 Configure ADC
The NI 9233 (and NI 9229/9239) converts at various rates, controlled by the field in the ADC
conversion command.
Table 69.
NI 9233 Vendor Configuration Extensions
Index
Sub
Type
R/W
Description
0x2002
0
U32
R/W
Configure ADC,
default = 0x0A
0x2100
0
ARR:U32
—
Calibration = 16
1
R
Ch0 Offset
2
R
Ch0 Gain
3
R
Ch1 Offset
...
—
—
8
R
Ch3 Gain
9
R
External Ch0 Offset
...
—
—
V
corrected
Raw
LSB
weight
10
×
12
–
(
)
×
Offset 10
×
9
–
–
=