Keysight E36731A Manuel D'instructions page 38

Output isolation
The outputs of the E36731A are isolated from earth ground. Any output terminal may be grounded, or an external
voltage source may be connected between any terminal output and ground. However, output terminals must be
kept within ±240 Vdc of ground. Any one of the terminals can be tied to ground as needed. An earth ground terminal
is provided on the front panel for convenience.
SHOCK HAZARD. Floating voltages must not exceed 240 V
from chassis ground.
Ensure that transient voltages does not exceed 480 V
Before making any external connection, ensure the equipment input supply is grounded to MAINS.
The figure below shows an example of floating a power supply to 200 V above ground. The power supply output is
set to 40 V.
Example of negative terminal floating +200 V above ground (positive terminal is +240 V above ground)
You can see from this example that you have to take the power supply output voltage into consideration when
ensuring you are not violating the float voltage rating. If you exceed the float voltage rating of the power supply, you
are potentially exceeding the voltage rating of internal parts that could cause the internal parts to fail or break down
and present a shock hazard, so do not violate the float voltage rating!
38
. No output terminal may be more than 240 V
DC
when connected in series.
PK
Keysight E36731A User's Guide
DC