6703/6704 Calibration Procedure
8
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6.
Run
AO_VWrite
with
chan
set to 0 and
voltage
set to 10.0. This will
output 10.0 V on voltage channel 0.
7.
Again, compare the resulting value shown by the DMM to the upper
and lower limits listed in
table later in this document. If
the value falls between these limits, the board passes voltage
verification.
8.
Disconnect the DMM from the board.
You have now verified the voltage output of your board.
Verifying Current Output (6704 Only)
This procedure checks board operation by verifying that the current output
of channel 16 is within specifications. Because of the channel-to-channel
matching of the 6704 current channels, if current channel 16 is operating
within specifications, all the current channels should be operating within
specifications. However, you may verify the channels individually by
performing the procedure once for each current channel. To do this,
perform the procedure once for each value of the channel parameter from
16 to 31. You will also need to connect the appropriate channel to your
multimeter each time you repeat the procedure. See the
PCI/PXI-6703/6704 User Manual
for the pin numbers corresponding to
each channel.
To verify current output, make sure that you have read the
section previously covered, and follow these
steps.
1.
Run the
Get_Cal_Date
function contained in
ni6704Cal.dll
to
check the board’s previous calibration date.
2.
Connect the DMM to the board as shown in the following table.
3.
Place the multimeter in current mode.
4.
Run
AO_VWrite
with
chan
set to 16 and
voltage
set to 0.1. This will
output 0.1 mA on current channel 16.
5.
Compare the resulting value shown by the DMM to the upper and
lower limits listed in
section table. If the value falls
between these limits, the test has been passed.
6.
Run
AO_VWrite
with
chan
set to 16 and
voltage
set to 20.0. This will
output 20.0 mA on current channel 16.
Signal Name
Description
6704 Output
DMM Input
ICH16
Current Channel 16
Pin 67
High
AGND16
Analog Ground 16
Pin 68
Low