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NI PXIe-4154 Calibration Procedure
Note
After requesting a new current, wait 3 ms to take a measurement with an
external DMM to ensure the system has adequate time to settle while minimizing
self-heating effects of the internal measurement circuitry.
After all test points are measured for a range, call the niDCPower Cal Adjust Current Limit VI
or the
niDCPower_CalAdjustCurrentLimit
function to calculate updated calibration
coefficients. Refer to Table 22 for some parameters specific to adjustment applications for this
VI. Refer to the
NI DC Power Supplies and SMUs Help
for more information about
programming references common to VIs within the NI-DCPower API.
Note
Adjust positive and negative current polarities with separate calls to the
niDCPower Cal Adjust Current Limit VI or the
niDCPower_CalAdjustCurrentLimit
function.
Figure 14.
NI-DCPower Cal Adjust Current Limit VI Block Diagram
Table 21.
NI PXIe-4154 Current Output Adjustment Points
Channel
I Range
Required Adjustment Points
Precision
Shunt
Value
0
30 mA
0.3 mA
3.6 mA
6.9 mA
10.2 mA
13.5 mA
100
Ω
16.8 mA
20.1 mA
23.4 mA
26.7 mA
30 mA
0
3 A
0.030 A
0.327 A
0.624 A
0.921 A
1.218 A
100 m
Ω
1.515 A
1.812 A
2.109 A
2.406 A
2.7 A
1
1.5 A
0.015A
0.164 A
0.312 A
0.461 A
0.609 A
100 m
Ω
0.758 A
0.906 A
1.055 A
1.203 A
1.35 A
Table 22.
NI-DCPower Cal Adjust Current Limit VI Parameter Descriptions
Parameter
Description
range
The range to be adjusted with these settings.
requested outputs
Array of requested currents required for adjustment of a range. For
example, this would be the ten test points listed in Table 21 for each range.
measured outputs
Array of measurements made by external DMM corresponding to
requested outputs
.
number of measurements
The number of elements in
requested outputs
and
measured outputs
.
