Constant Current (Cc) Tests - Agilent Technologies 66319B User Manual

B - Performance, Calibration, and Configuration
c. Set the load to the Constant Current mode. For output 1, program the load current to 0.1A. For output
2, program the load current to 0.75A.
d. Set the electronic load's transient generator frequency to 100 Hz and its duty cycle to 50%.
e. For output 1, program the load's transient current level to 1.5A. For output 2, program the load's
transient current level to 1.5A.Turn the transient generator on.
f. Adjust the oscilloscope for a waveform similar to that in Figure B-2.
g. The output voltage should return to within the specified voltage in less than 20 microseconds for
output 1, and less than 400 microseconds for output 2 following the specified load change in the
HRemote compensation range. Check both loading and unloading transients by triggering on the
positive and negative slope. Record the voltage at time "t" in the performance test record card under
CV Transient Response.

Constant Current (CC) Tests

CC Setup
Follow the general setup instructions in the Measurement Techniques paragraph and the specific
instructions given in the following paragraphs.
Current Programming and Readback Accuracy (performance, calibration)
This test verifies that the current programming and 3A range readback are within specification.
a. Turn off the dc source and connect the current monitoring resistor across the dc source output and the
DVM across the resistor as in Figure B-1b. See "Current Monitoring Resistor" for connection
information.
b. Turn on the dc source and program the output voltage to 5 V and the current to 0 A. The dc source's
current detector must be set to DC.
c. Divide the voltage drop (DVM reading) across the current monitoring resistor by its 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 performance test record card for the
appropriate model under Current Programming and Readback @ 0 A.
d. Program the output current to the full-scale value in Table B-2.
e. Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to
convert to amps and record this value (Iout). Also, record the current reading that appears on the
front panel display. The readings should be within the limits specified in the performance test record
card for the appropriate model under Current Programming and Readback @ Full Scale.
146
tttt
v
v
t
Unloading
Transient
Figure B-2. Transient Waveform
Loading
Transient
t