National Instruments SCXI-1141, Процедура калибровки

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SCXI-1141/1142/1143 Calibration Procedure 16 ni.com
3. Call
SCXI_Set_Gain
to configure the module to a gain value of 1.
Set the following parameters:
• SCXIchassisID —The value obtained from MAX
• moduleSlot —4
• moduleChan —0
• gain —1
4. Call
SCXI_Configure_Filter
to enable the filter bypass.
Set the following parameters:
• SCXIchassisID —The value obtained from MAX
• moduleSlot —4
• channel —0
• filterMode —0
• freq —0 kHz
• cutoffDivDown —0
• outClkDivDown —0
5. Connect the calibrator to analog input channel 0. Refer to Table 7 to
determine the pins on the 96-pin front connector that correspond to the
positive and negative inputs of the specified channel. If you are using
an SCXI-1304 that is connected to the SCXI-1141/1142/1143, connect
the calibrator to the AI 0 + and AI 0 – inputs.
6. Connect the DMM to the output of channel 0. Refer to Table 8 to
determine the pins on the 50-pin rear connector that correspond to the
positive and negative outputs for the specified channel. For example,
the positive output for channel 0 is pin 3, which is AI 0 +. The negative
input for channel 0 is pin 4, which is AI 0 –.
7. Set the calibrator voltage to 3.4 V
rms
, 400 Hz.
8. Measure and record the amplitude of the sine wave with the DMM.
9. Call
SCXI_Configure_Filter
to enable the cutoff filter. Set the
following parameters:
• SCXIchassisID —The value obtained from MAX
• moduleSlot —4
• channel —0
• filterMode —1
• freq —25 kHz
• cutoffDivDown —0
• outClkDivDown —2