NI 5450 Calibration Procedure
16
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6.
Short-circuit the channel 0 input of the digitizer by connecting the
calibrator test head directly to the digitizer and grounding the output
of the calibrator.
7.
Wait 2,500 ms for the impedance matching of the calibrator to settle.
Note
If the calibrator stays shorted, you do not need to repeat steps 6 and 7 for every
iteration listed in Table 3 (NI 5152) or Table 4 (NI 5153/5154).
8.
Initiate a waveform acquisition using the niScope Initiate
Acquisition VI.
9.
Fetch a waveform from the digitizer and perform a voltage average
measurement using the niScope Fetch Measurement (poly) VI. Select
the Measurement Scalar DBL instance of the VI.
Compare the resulting average voltage to the value listed under the
C
alibration Test Limits
or
Published Specifications
column in Table 5
(NI 5152) or Table 6 (NI 5153/5154) that corresponds to the vertical
range used. If the result is within the selected test limit, the device has
passed this portion of the verification.
Note
The
inputImpedance
and
maxInputFrequency
you configured in step 2 do not
affect the test limit value.
10. Repeat steps 2 through 9 for each iteration in Table 3 (NI 5152) or
Table 4 (NI 5153/5154).
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_AVERAGE