Publicité
Les langues disponibles
Les langues disponibles
each output to one half of the total desired output current. Set the voltage limit to a value higher than
the expected output voltage.
Effect on Specifications
Specifications for outputs operating in parallel can be obtained from the specifications for single
outputs. Most specifications are expressed as a constant or as a percentage (or ppm) plus a constant.
For parallel operation, the percentage portion remains unchanged while constant portions or any
constants are changed as indicated below. For current readback accuracy and temperature coefficient
of current readback, use the minus current specifications:
Current: All parallel specifications referring to current are twice the single output specification except
for programming resolution, which is the same for both single output and parallel output operation.
Voltage: All parallel specifications referring to voltage are the same as for a single output except for
CV load effect, CV load cross regulation, CV source effect, and CV short term drift. These are all twice
the voltage programming accuracy (including the percentage portion) at all operating points.
Load Transient Recovery Time: Load transient specifications are typically twice the single output.
Series Connections
SHOCK HAZARD Floating voltages must not exceed 240 VDC. No output terminal
may be more than 240 VDC from chassis ground.
Only connect outputs that have identical voltage and current ratings in series.
Keysight Models N678xA SMU, N6783A, and N679xA Loads cannot be connected in
series.
.To prevent currents from damaging the power system when the load is connected,
always turn series-connected outputs on and off together.
Do not leave one output on while the other is off.
Connecting outputs in series provides a greater voltage capability than can be obtained from a single
output. Because the current is the same through each element in a series circuit, outputs connected in
series must have equivalent current ratings.
The following figures show how to connect two outputs in series to a single load. If voltage drop in the
load leads is a concern, connect the sense leads of output 1 and output 2 for remote sensing as shown
in the figure on the right. Note that the +sense lead of output 1 must remain connected to the -sense
terminal of output 2.
Keysight N6700C Series User's Guide
2 Installation
67
Publicité
