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NI 449
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Calibration Procedure
10. Finish the AI calibration with the DAQmx Close External Calibration VI, as shown below.
Use the action
cancel
if there has been any error during the AI calibration or if you do not
want to save the new AI calibration constants in the device EEPROM. Use the action
commit
if you want to save the new AI calibration constants in the device EEPROM.
The device is now calibrated with respect to your external sources. After calibrating the device,
verify the analog input operation by repeating the
section using the after adjustment
values found in Tables 5, 8, and 15, and the values found in Table 14.
Updating the Calibration Date and Time without Performing
Adjustment
You can update the calibration date and time without performing the adjustment procedure.
Complete the following steps to update the calibration date and time:
1.
Open a calibration session using the DAQmx Initialize External Calibration VI with the
following parameters:
•
deviceName
:
Dev_name
•
password
:
NI
•
calHandle
:
&myCalHandle
2.
Close the session with the DAQmx Close External Calibration VI with the following
parameters:
•
calHandle
:
myCalHandle
•
action
:
DAQmx_Val_Action_Commit
The calibration date and time are saved in the device EEPROM.
LabVIEW Block Diagram
NI-DAQmx Function Call
Call
DAQmxCloseExtCal
with the
following parameters:
calHandle
:
myCalHandle
action
:
DAQmx_Val_Action_Commit
or
DAQmx_Val_Action_Cancel
