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NI PXI-4110 Calibration Procedure
Verifying Current Programming Accuracy
Note
Program the NI 4110 in DC Voltage mode for this test.
To verify current programming accuracy, compare a set of requested current test points to
measurements of the actual current at the output by the DMM. Connect an NI APS-4100
auxiliary power supply for this verification procedure. Refer to Figure 2 for the necessary
connections.
Figure 2.
Current Accuracy Verification Test System
Configure the DMM using the configuration settings for channel
x
voltage test points and external load settings that you must measure in DC Voltage mode for each
current range to complete verification. For example, the 1 A range requires verification at the
following outputs from the NI 4110, taking measurements using the external DMM at each
point:
•
0.02 A
•
0.25 A
•
0.5 A
•
0.75 A
•
1.0 A
The value in the Output (A) column of Table 7 is the current limit value that you should
program for each setpoint.
Note
The values in the
Output
(A) column are the settings for the current limit. This
column is labeled
Output
because the current limit is the value that the NI 4110
generates.
Lo
a
d
+
–
NI PXI-4110
HI
LO
DMM
C
u
rrent
Mode
+
–
A
u
xili
a
ry Power
Su
pply
NI AP
S
-4100
+
–
AUX IN +
AUX IN –
