Agilent Technologies N6751A User Manual page 135

Constant Current Tests
NOTE
Series N6700 User's Guide
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Test each output channel individually. Refer to the appropriate test record form
for the instrument settings of the model you are checking.
Current Programming and Readback Accuracy
Test category = performance, calibration
This test verifies that the current programming and measurement
functions are within specifications.
1
Turn off the power system and connect the current shunt directly
across the output terminals. Connect the DVM directly across the
current shunt as shown in Test Setup figure (B). Note that the
electronic load is not used in this portion of the test.
2
Turn on the power system and program the instrument settings
as described in the test record form under "Current
Programming & Readback, Min Current". The CC annunciator
should be on and the output voltage reading should be
approximately zero.
3
Divide the voltage drop (DVM reading) across the current shunt
by the shunt resistance to convert to amps and record this value
(Iout). Also, record the current reading on the front panel
display. The readings should be within the limits specified in the
test record form for the appropriate model under "Current
Programming and Readback, Min Current".
4
Program the instrument settings as described in the test record
form under "Current Programming & Readback, High Current".
5
Divide the voltage drop (DVM reading) across the current shunt
by the shunt resistance to convert to amps and record this value
(Iout). Also, record the current reading on the front panel
display. The readings should be within the limits specified in the
test record form for the appropriate model under "Current
Programming and Readback, High Current".
6
For Agilent Models N6761A and N6762A only. Repeat steps 4 - 5
for the low current range. Program the instrument settings as
described in the test record form under "Current Programming &
Readback, Low Current". The readings should be within the
limits specified in the test record form for the appropriate model
under "Current Programming and Readback, Low Current".
Verification and Calibration Appendix B
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