National Instruments 6738, Процедура калибровки

Страница: 13 / 16

NI 6738/6739 Calibration Procedure | © National Instruments | 13
1. Connect the DMM to AO 0 as shown in Table 2, Analog Output Connections .
Note
If you are using the NI 4070, ensure that it is set to the 10 V range.
2. Call
DAQmxCreateAOVoltageChan
with the following parameters:
• taskHandle :
taskHandle
• physicalChannel :
Dev_name/ao0
• nameToAssignToChannel :
AOVoltageChannel
• minVal :
-10.0
• maxVal :
10.0
• units :
DAQmx_Val_Volts
• customScaleName :
NULL
Note
Throughout the procedure, refer to the NI-DAQmx function call parameters
for the LabVIEW input values.
3. Call
DAQmxStartTask
with the following parameter using Table 3, NI 6738/6739 Analog
Output Values :
• taskHandle :
taskHandle
4. Call
DAQmxWriteAnalogF64
with the following parameters, using
7.5
for
data
:
• taskHandle :
taskHandle
• numSampsPerChan :
1
• autoStart :
1
• timeout :
10.0
• dataLayout :
DAQmx_Val_GroupByChannel
• writeArray :
&data
• sampsPerChanWritten :
&samplesWritten
• reserved :
NULL
5. Use the DMM to read the value of AO 0.
6. Call
DAQmxClearTask
with the following parameter:
•
taskHandle
:
taskHandle
7. Call
DAQmxInitExtCal
with the following parameters:
• deviceName :
Dev_name
• password :
NI
• calHandle :
&calHandle