National Instruments 446 Series Calibration Procedure page 27

NI-DAQmx Function Call
Call
DAQmxWriteAnalogF64
following parameters:
taskHandle:
myTaskHandle
numSampsPerChan:
autoStart:
FALSE
timeout:
10.0
dataLayout:
DAQmx_Val_GroupByChannel
writeArray:
myDataArray
reserved:
NULL
sampsPerChanWritten:
int32PointerReturnValue
NI-DAQmx Function Call
Call
DAQmxStartTask
parameters:
taskHandle:
myTaskHandle
Device Output
Amplitude
Device Gain
– 40
–20
0
© National Instruments Corporation
9. Configure the onboard memory of the device using the following
function and the array modified in step 3.
with the
1024
10. Start the task using the following function.
with the following
11. Measure the DC voltage of the analog output channel using the
multimeter in the appropriate range. Compare this value to the
limits (V) in Table 5 for – 40 dB device gain
Table 5. AO Gain Accuracy Limits
(VDC) Min (dB)
0.09 – 0.04
0.9 – 0.04
9.0 – 0.04
LabVIEW Block Diagram
LabVIEW Block Diagram
.
Output Amplitude Accuracy
Max (dB)
0.04
0.04
0.04
27
Min (V) Max (V)
0.089587 0.090415
0.89587 0.90415
8.9587 9.0415
NI 446X Calibration Procedure