Agilent Technologies 2110-0457, Руководство пользователя

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Chapter 2 General Information
Output Connections
34
Reverse Current Loading
An active load connected to the power supply may actually deliver a reverse
current to the supply during a portion of its operating cycle. An external source
can not be allowed to pump current into the supply without risking loss of
regulation and possible damage. These effects can be avoided by pre-loading
the output with a dummy load resistor. The dummy load resistor should draw
at least the same amount of current from the supply as the active load may
deliver to the supply. The value of the current for the dummy load plus the
value of the current the load draws from the supply must be less than the
maximum current of the supply.
Remote Voltage Sensing Connections
Remote voltage sensing is used to maintain regulation at the load and reduce
the degradation of regulation that would occur due to the voltage drop in the
leads between the power supply and the load.
When the power supply is connected for remote sensing, the OVP circuit senses
the voltage at the
sensing
points (load) and not the output terminals.
Connections between the power supply sensing and output terminals should
be removed, and using shielded two-wire cable, the power supply sensing
terminals should be connected to the load as shown in Figure 2-1.
Do not use
the shield as one of the sensing conductors and the other end should be left
unconnected
. Connect one end of the sensing lead shield to the chassis ground
( ) only. Opening a sensing lead causes the power supply output voltage to
decrease at the load leads. Observe polarity when connecting the sensing leads
to the load.
Figure 2-1. Remote Voltage Sensing Connections
Figure 2-2. Local Sensing Connections