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NI 5450 Calibration Procedure
20
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6.
Connect the calibrator test head directly to the channel 0 input of the
digitizer and output the
Positive Input (V)
in Table 7 (NI 5152) or
Table 8 (NI 5153/5154) that corresponds to the vertical range used.
Be sure to configure the load impedance of the calibrator to match the
input impedance of the digitizer.
7.
Wait 2,500 ms for the impedance matching 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 average
measurement using the niScope Fetch Measurement (poly) VI. Select
the Measurement Scalar DBL instance of the VI. The resulting value
is the
Measured Positive Input Voltage
used in step 14.
10. Using the calibrator, output the
Negative Input Voltage
listed in
Table 7 (NI 5152) or Table 8 (NI 5153/5154) that corresponds to the
vertical range used.
11. Wait 2,500 ms for the impedance matching of the calibrator to settle.
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