AO Waveform Calibration Procedure for NI-DAQmx
12
ni.com
AO Adjustment Procedure
Use the AO adjustment procedure to adjust the analog output calibration
constants. At the end of each calibration procedure, these new constants are
stored in the external calibration area of the EEPROM. These values are
password-protected, which prevents the accidental access or modification
of any calibration constants adjusted by the metrology laboratory. The
default password is
NI
.
To perform adjustment of the device with a calibrator, complete the
following steps:
1.
Connect the calibrator to the device according to Table 3.
2.
Set your calibrator to output a voltage of 5 V.
3.
Open a calibration session on your device using
DAQmxInitExtCal
(
DAQmx Initialize External Calibration VI
). The default password
is
NI
.
Table 3.
Connecting the Calibrator to the Device
671
X
/672
X
/673
X
Pins
Calibrator
AO EXT REF (pin 20)
Output High
AO GND (pin 54)
Output Low
NI-DAQ Function Call
LabVIEW Block Diagram
Call
DAQmxInitExtCal
with the following
parameters:
deviceName
:
dev1
password
:
NI
calHandle
:
&calHandle
