22
|
ni.com
|
NI PXI-4130 Calibration Procedure
Current Load Regulation
To verify current load regulation, use the NI 4130 in Constant Current mode and confirm that
the output current change falls within calculated limits while varying the load voltage using
different resistors. Table 11 lists the resistance values and measurements needed to complete
verification. Refer to Figure 7 for the necessary connections.
Figure 7.
Current Load Regulation Verification Connection Diagram
Complete the following steps to verify current load regulation:
1.
For each test, connect the first specified resistance (
R
1
) to the specified channel of the
NI 4130.
2.
While taking a voltage measurement with the NI 4130 (
V
1
), use the DMM in series to
measure the output current (
I
1
).
3.
Change the load from
R
1
to
R
2
and repeat the previous step.
4.
For each test, the units for all current measurements and calculations should be the same as
the
I Range
unit. Record the current and voltage measurements for both resistances.
Lo
a
d
+
–
NI 41
3
0
LO
S
en
s
e
HI
S
en
s
e
HI
LO
DMM
C
u
rrent
Mode
+
–
A
u
xili
a
ry Power
Su
pply
+
–
AUX IN
+
AUX IN
–
NI AP
S
-4100