National Instruments NI PXI-5422

27. Call niFgen_ReadCalADC (niFgen Read CAL ADC VI) to measure

the analog output voltage with the onboard calibration ADC using the

following parameters:

•vi: The session handle returned from niFgen_InitExtCal

•numberOfReadsToAverage: 3

•returnCalibratedValue: VI_FALSE

•calADCValue: A ViReal64 variable. The variable passed by

reference through this parameter receives the voltage measured

by the onboard calibration ADC. This value is cal ADC

measurement 1, which is used in step 32.

28. Call niFgen_SetAttributeViBoolean to enable the analog output

(niFgen property node: Basic Operation»Output Enabled) using

the following parameters:

•vi: The session handle returned from niFgen_InitExtCal

•channelName: "0"

•attributeID: NIFGEN_ATTR_OUTPUT_ENABLED

•value: VI_TRUE

29. Call niFgen_Commit (niFgen Commit VI) to commit the attribute

values to the device using the following parameter:

•vi: The session handle returned from niFgen_InitExtCal

30. Wait 500 ms for the output to settle.

31. Use the DMM to measure the NI PXI-5422 voltage output directly into

the DMM (into a high-impedance load). This measurement be

external measurement 1, which is used in step 32.

32. Call niFgen_CalAdjustCalADC (niFgen Cal Adjust Cal ADC VI)

using the following parameters:

•vi: The session handle returned from niFgen_InitExtCal

•voltagesMeasuredExternally: An array containing two

elements—the two voltages (external measurement 0,

external measurement 1) that you measured with the

DMM in order

•voltagesMeasuredWithCalADC: An array containing two

elements—the two voltages (cal ADC measurement 0,

cal ADC measurement 1) that you measured with the onboard

calibration ADC in the order that you measured them