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National Instruments Corporation
47
NI 5421/5441 Calibration Procedure
9.
Call
niFgen_SetAttributeViInt32
to set the analog path value
(niFgen property node:
Output Attributes»Analog Path
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_ANALOG_PATH
•
value
:
NIFGEN_VAL_DIRECT_ANALOG_PATH
10. Call
niFgen_Commit
(niFgen Commit VI) to commit the attribute
values to the device using the following parameter:
•
vi
: The session handle returned from
niFgen_InitExtCal
11. Take the following voltage measurements at the NI 5421/5441 CH 0
front panel connector into a high-impedance load:
a.
Call
niFgen_WriteBinary16AnalogStaticValue
(niFgen
Write Binary 16 Analog Static Value VI) to set the main DAC
value using the following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
value
:
32767
b.
Call
niFgen_SetAttributeViInt32
to set the gain DAC value
(niFgen property node:
Calibration»Gain DAC Value
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_GAIN_DAC_VALUE
•
value
:
1800
c.
Call
niFgen_Commit
(niFgen Commit VI) to commit the
attribute values to the device using the following parameter:
•
vi
: The session handle returned from
niFgen_InitExtCal
d.
Wait 500 ms for the output to settle.
e.
Use the DMM to measure the voltage output by the device. This
measurement is
measurement 0
, which is used in step 12.
f.
Call
niFgen_SetAttributeViInt32
to set the gain DAC value
(niFgen property node:
Calibration»Gain DAC Value
) using the
following parameters:
•
vi
: The session handle returned from
niFgen_InitExtCal
•
channelName
:
"0"
•
attributeID
:
NIFGEN_ATTR_GAIN_DAC_VALUE
•
value
:
2600
