National Instruments 446 Series, Calibration Procedure, Page: 34 / 42

NI 446X Calibration Procedure 34 ni.com
Adjusting the Analog Output
Complete the following steps to adjust the analog output:
1. Connect the input of the multimeter to the analog output channel 0 of
the device.
2. Initialize the AO Calibration using the following function call.
You use the object
myCalHandle
in all subsequent NI-DAQmx
calibration function calls.
3. Create an array of double float of size 1024. Initialize all the values in
the array to
1.0
.
4. Multiply each value in the array by 0.09. This is the Device Output
Voltage, Requested High Voltage listed in Table 7 for – 40 dB device
gain. Use this array to output a DC voltage using the device analog
output channel 0.
5. If you use C function calls, create a task using the following function.
If you use LabVIEW, skip this step. The task is created in step 6 in
LabVIEW.
You use the object
myTaskHandle
in all subsequent NI-DAQmx
function calls.
NI-DAQmx Function Call LabVIEW Block Diagram
Call
DAQmxInitExtCal
with the following
parameters:
deviceName :
dev1
password :
userPassword
calHandle
:
myCalHandle
NI-DAQmx Function Call LabVIEW Block Diagram
Call
DAQmxCreateTask
with the following
parameter:
taskHandle :
mytaskHandleReturnValue
LabVIEW does not require this step.