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National Instruments Corporation
27
NI 5450 Calibration Procedure
the Measurement Scalar DBL instance of the VI. The resulting value
is the
Measured Negative Input Voltage
17. Calculate the error in the programmable vertical offset as a percentage
of input using the formula:
where
a =
the
Measured Positive Input Voltage
b
= the
Measured Negative Input Voltage
c
= the applied
Positive Offset
d
= the applied
Negative Offset
Compare the resulting percent to the
Calibration Test Limits
or the
Published Specifications
listed in Table 9. If the result is within the
selected test limit, the device has passed this portion of the verification.
18. Repeat steps 2 through 17 for each iteration in Table 9.
19. Move the calibrator test head to the channel 1 input of the digitizer and
repeat steps 2 through 18, changing the
channelList
parameter from
"0"
to
"1"
.
20. End the session using the niScope Close VI.
You have finished verifying the programmable vertical offset accuracy of
the NI 5152.
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
LabVIEW VI
C/C++ Function Call
Call
niScope_close
with the following
parameters:
vi
: The instrument handle from
niScope_init
error
a
b
–
c
d
–
------------
1
–
100
×
=