NI 9237 Calibration Procedure
12
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Specifications
The values in the following table are based on calibrated scaling
coefficients, which are stored in the onboard EEPROM. The following
calibration specifications are for 23 ±10 °C.
Test Limits
Table 4 lists the specifications that the NI 9237 should meet if it has been
one year between calibrations.
Using the Table
The following definitions describe how to use the information from
Table 4.
Excitation Setting Value
The
Excitation Setting Value
is the voltage value to enter in the DAQmx
Create Virtual Channel VI in step 4.
Calibrator Output
The
Calibrator Output
is the voltage value that you source into the NI 9237
for verification purposes. This value is broken down into two
columns—
Location
and
Value
.
Location
refers to where the value fits
within the test range.
Value
refers to the voltage value to be verified.
Max
refers to maximum value,
Min
refers to minimum value, and
Mid
refers to
mid-scale.
Range
The
Range
is the minimum and maximum voltage range of the input signal.
Table 3.
NI 9237 Accuracy
Excitation Setting Value (V)
Gain Error
Offset Error (
μ
V/V)
2.5
0.14%
32.5
3.3
0.12%
10
5.0
0.14%
27.5
10.0
0.16%
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