National Instruments NI 6703, Процедура калибровки

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NI 6703/6704 Calibration Procedure for Traditional NI-DAQ 10 ni.com
7. Call
AO_VWrite
with the channel set to the current gain channel.
Adjust the voltage parameter until the DMM reads as close to 20.0 mA
as possible. The value you write to the current gain channel is close to
19.608 mA. Increasing the voltage value lowers the magnitude of the
current on current channel 16. Decreasing the voltage value increases
the magnitude of the current on current channel 16.
You have now adjusted the current output.
Saving Calibration Values
After you have adjusted the calibration constants, you must store the new
calibration constants in the user calibration area of the NI 6703/6704
EEPROM to ensure that the new calibration values are permanently saved
and automatically loaded when the NI 6703/6704 is powered on. If the
calibration is being performed by a metrology laboratory or another facility
that maintains traceable standards, the calibration values should also be
stored in the factory calibration area. Calibration constants stored in the
factory calibration area cannot be overwritten by the user.
To save the calibration constants and update the calibration dates, complete
the following steps:
1. Call
AO_Calibrate
to store the new calibration constants in the user
calibration area of the EEPROM. Set the following parameters:
• operation : 2
• calibrationArea : 1
2. Call
Set_DAQ_Device_Info
to configure the NI 6703/6704 so it is
no longer possible to access the calibration channels. Set the following
parameters:
• infoType :
ND_CALIBRATION_ENABLE
• infoValue :
ND_NO
3. If the calibration is being performed by a metrology laboratory or
another facility that maintains traceable standards, call the
Copy_Cal
function in the
ni6704Cal
.
dll
. Calling this function copies the
calibration values to the factory calibration area and updates the
calibration date to match the system clock of the calibration computer.
The NI 6703/6704 is now adjusted.
Verifying the New Calibration Constants
You can verify the new calibration constants by repeating the Verifying the
Performance of the NI 6703/6704 section.