National Instruments 446 Series Calibration Procedure page 18

NI-DAQmx Function Call
Call
DAQmxReadAnalogF64
the following parameters:
taskHandle:
myTaskHandle
numSampsPerChan:
timeout:
10.0
fillMode:
DAQmx_Val_GroupByChannel
arraySizeInSamps:
reserved:
NULL
readArray:
float64ArrayReturnValue
sampsPerChanRead:
int32PointerReturnValue
NI-DAQmx Function Call
Call
DAQmxStopTask
parameters:
taskHandle:
myTaskHandle
NI-DAQmx Function Call
Call
DAQmxClearTask
parameters:
taskHandle:
myTaskHandle
NI 446X Calibration Procedure
8. Acquire data using the following function.
with
-1
102400
9. Stop the task using the following function.
with the following
10. Clear the task using the following function.
with the following
11. Average all the values in the array returned from the acquisition. This
average is used to calculate the gain accuracy for AI 0 at –20 dB device
gain setting. Compare this value to the limits (V) in Table 3.
LabVIEW Block Diagram
LabVIEW Block Diagram
LabVIEW Block Diagram
18 ni.com