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
Adjusted Specifications
Adjustment corrects the following specifications for the device:
•
Voltage programming accuracy
•
Current programming accuracy
•
Voltage measurement accuracy
•
Current measurement accuracy
Following the adjustment procedure automatically updates the calibration date and
temperature on the device.
Note
You do not need to separately adjust both measurement and output. The
architecture of the NI 4141 ensures that if measurement is accurate, then output is as
well, and vice versa.
Self-Calibrating
Complete the following steps to self-calibrate the device.
1.
Disconnect or disable all connections to the device.
2.
Ensure the device had 30 minutes to warm up with the PXI chassis fans set to HIGH.
3.
Initialize an NI-DCPower session.
4.
Call the self-calibration function.
5.
Close the NI-DCPower session.
NI PXIe-4141 Calibration Procedure
|
© National Instruments Corporation
|
13
