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NI 5450 Calibration Procedure
36
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6.
Connect the scope calibrator test head directly to the channel 0 input
of the digitizer. Configure the calibrator to output a 51 kHz sine wave
with peak-to-peak voltage amplitude set to
Input Voltage
listed in
Table 12 (NI 5152), Table 13 (NI 5153), or Table 14 (NI 5154).
Configure the load impedance of the calibrator to match the input
impedance of the digitizer.
7.
Wait 2,500 ms for the impedance matching and frequency of the
calibrator to settle.
8.
Initiate a waveform acquisition using the niScope Initiate
Acquisition VI.
9.
Fetch a waveform from the digitizer and perform a voltage RMS
measurement using the niScope Fetch Measurement (poly) VI. Select
the Measurement Scalar DBL instance of the VI. The resulting value
is the
Measured RMS Voltage of 51 kHz Sine Wave
used in step 17.
LabVIEW VI
C/C++ Function Call
Call
niScope_InitiateAcquisition
with the following parameter:
vi
: The instrument handle from
niScope_init
LabVIEW VI
C/C++ Function Call
Call
niScope_FetchMeasurement
with
the following parameters:
vi
: The instrument handle from
niScope_init
timeout
:
1.0
channelList
:
"0"
scalarMeasFunction
:
NISCOPE_VAL_VOLTAGE_RMS