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PXIe-4309 Calibration Procedure
d.
Use the DMM to measure the internal reference of the PXIe-4309 and record the
measurement for future use.
e.
Compare the internal reference measurement to the test limits in Table 7.
Note
If the reference measurement falls outside of the test limits, verify that the
measurement connections and configurations are correct.
2.
Call
DAQmx Initialize External Calibration
(DAQmxInitExtCal) with the
following parameters:
deviceName
:
Dev_name
password
:
NI
(default)
Use the
calhandle out
from this function to reference the current session.
3.
Call the 4309 instance of DAQmx Adjust SC Express Calibration Polymorphic
(DAQmxAdjust4309Cal) and enter the measured internal reference value.
4.
Call
DAQmx Close External Calibration
(DAQmxCloseExtCal) to close the
session.
5.
Use the action
cancel
if there has been any error during the calibration or if you do not
want to save the new calibration constants in the device EEPROM.
6.
Use the action
commit
if you want to save the new calibration constants in the device
EEPROM.
EEPROM Update
Upon successful completion of an adjustment procedure, the calibration constants, date, and
temperature in the device EEPROM are automatically updated.
You can update the calibration date and onboard calibration temperature without making any
adjustments by initializing an external calibration and closing the external calibration with a
commit action.
Table 7.
Internal Reference Test Limits
Lower Test Limit (V)
Higher Test Limit (V)
6.741
7.298
