Specifications

2 Performance Verification
18 Series N6700 Service Guide
Constant Current Tests
NOTE
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 DMM directly across the
current shunt (see Test Setup 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 output status
should be “CC”, and the output voltage should be close to zero.
3 Divide the voltage drop (DMM reading) across the current shunt
by the shunt resistance to convert to amps and record this value
(Iout). Also, record the current measured over the interface. The
readings should be within the limits specified in the test record
form for the appropriate model under “Current Programming &
Readback, Minimum Current”.
4 Program the instrument settings as described in the test record
form under “Current Programming & Readback, High Current”.
5 Divide the voltage drop (DMM reading) across the current shunt
by the shunt resistance to convert to amps and record this value
(Iout). Also, record the current reading measured over the
interface. The readings should be within the limits specified in
the test record form for the appropriate model under “Current
Programming & Readback, High Current”.
6 For models N6761A and N6762A only. Connect the Agilent
3458A directly across the output (see Test Setup D without the
resistor). Set the Agilent 3458A to the 100 mA range (no
autoranging). Set both the current programming and the current
measurement functions to the low range. Set the instrument as
described under “Current Programming & Readback, Low
Current”. Record the current reading of the 3458A. Also, record
the current reading measured over the interface. The readings
should be within the limits specified under “Current
Programming & Readback, Low Range”.
7 For models N6761A and N6762A with option 2UA only. Connect
the Agilent 3458A and a 20k resistor to the output (see Test
Setup D). Set the Agilent 3458A to measure current using the 1
mA range. Set the current measurement to the 200 μA range. Set
the instrument as described in the test record form under