National Instruments NI 5922, Процедура калибровки

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© National Instruments Corporation 13 NI 5922 Calibration Procedure
Compare the resulting average voltage to the value listed in the
Calibration Test Limits column or the Published Specifications
column in Table 3 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.
7. Repeat steps 1 through 6 for each iteration in Table 3.
8. Repeat steps 1 through 7 for channel 1, changing the value of the
channelList parameter from
"0"
to
"1"
.
Noise
Complete the following steps to verify noise performance of the NI 5922.
You must verify both channels and each iteration listed in Table 4.
1. Disconnect all cabling from the BNC inputs of the NI 5922. No input
signal is needed because the NI 5922 internal 50
Ω
resistor connects
the input to ground.
2. Call
niScope_ConfigureChanCharacteristics
(niScope
Configure Chan Characteristics VI) with the following parameters:
• channelList :
"0"
• inputImpedance :
NISCOPE_VAL_50_OHM
• maxInputFrequency :
0
3. Call
niScope_ConfigureVertical
(niScope Configure Vertical
VI) with the following parameters:
• channelList :
"0"
• Range : The Range value for the current iteration from Table 4
• Offset :
0.0
• Coupling :
NISCOPE_VAL_DC
• ProbeAttenuation :
1.0
• Enabled :
NISCOPE_VAL_TRUE
4. Call
niScope_ConfigureHorizontalTiming
(niScope Configure
Horizontal Timing VI) with the following parameters:
• minSampleRate : The Sample Rate value for the current iteration
• minNumPts :
65536
Table 3. NI 5922 Vertical Offset Calibration
Iteration Range (V)
Calibration Test
Limits (V)
Published
Specifications (V)
1 2 ±26 µV ±50 µV
2 10 ±48 µV ±100 µV