Table 5.
Current Remote Sense Output Verification (Continued)
Level Range
Limit Range and Limit
Test Point
Load
1
Load
2
Base Limit
10 mA
10 V
-10 mA
100 Ω
100 Ω
3.3 μA
0 mA
10 mA
100 mA
10 V
-100 mA
10 Ω
10 Ω
33 μA
0 mA
100 mA
1.
Set the first specified level range, limit range, and limit on the NI 4141.
2.
Set the level on the NI 4141 to the first specified test point.
3.
Calculate the total lead drop using the following steps.
a)
Take a current measurement using the DMM. Record the value.
b)
Calculate the voltage across
Load1
using the following formula:
DMM Measured
Current
*
Load1
. Record as
Lead Drop 1
.
c)
Calculate the voltage across
Load2
using the following formula:
DMM Measured
Current
*
Load2
. Record as
Lead Drop 2
.
d)
Calculate the total lead drop using the following equation:
Total Lead Drop
=
Lead
Drop 1
+
Lead Drop 2
. Record the value.
4.
Calculate the upper and lower current remote sense test limits using the following
equation:
Current Remote Sense Test Limit
=
Test Point
± (
Base Limit
+ (
Total Lead Drop
× 0.02% of
Level Range
). Record the test limits.
5.
Verify the recorded DMM current falls within the test limits.
6.
If more than one test point per level range is specified, repeat the previous steps for each
test point, from setting the level to the test point on the NI 4141 up to this step.
7.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Adjustment
This section describes the steps needed to adjust the NI 4141 to meet published specifications.
Related Information
For information on VIs and functions used in adjustment, refer to the NI DC Power and SMUs
Help
12
|
ni.com
|
NI PXIe-4141 Calibration Procedure
