Technical data

APPLICATIONS INFORMATION
69
Power Products Terms
ac input current: the maximum current into the power supply
or electronic load. The current specified is worst case (low
line voltage, full output).
Actual transition time: for an electronic load, either the total
slew time (voltage or current change divided by slew rate -
time) or the minimum transition time, whichever is longer.
Risetime Transition Limitation
Ambient temperature: the temperature of the air immediately
surrounding the power supply or electronic load.
Analog programming: controlling the output voltage and/or
current with an analog signal. This signal could be a voltage,
current or resistance. This is similar to using the power
supply as an amplifier.
Auto-parallel operation: a master-slave connection of the
outputs of two or more supplies or the inputs of two or more
electronic loads used for obtaining a current rating greater
than can be obtained from a single load or supply. Only sup-
plies that have the same voltage and current ratings should
be paralleled.
Autoranging power supply: a power supply that can provide
maximum rated power over a wide and continuous range of
voltage and current settings.
Auto-series operation: a master-slave connection of the outputs
of two or more supplies used for obtaining a voltage greater
than can be obtained from one supply. Only supplies that
have the same voltage and current ratings should be
connected in series.
Auto-tracking operation: a master-slave connection of two or
more supplies each of which has one of its output terminals
in common with one of the output terminals of all of the
other supplies.
Command processing time: the average time required for a
power supply output voltage, or electronic load input voltage
or current, to begin to change following receipt of a voltage or
current set command over GPIB. This is effectively the time it
takes for the power supply or electronic load to interpret the
voltage set command and initiate a response.
Common mode noise: the current flowing from either
output terminal (+ and –) through the power supply to
chassis ground.
Complementary tracking: a master-slave interconnection of two
supplies in which the voltage of the slave is equal to or pro-
portional to that of the master and of opposite polarity with
respect to a common point. (See also master-slave operation).
Compliance voltage: the output voltage of a power supply
operating in the constant-current mode.
Constant-current (CC) power supply: a power supply that
stabilizes output current with respect to changes in load
impedance. Thus, for a change in load resistance, the output
current remains constant while the output voltage changes by
whatever amount necessary to accomplish this.
Constant-current/voltage/resistance mode electronic load: an
electronic load that can operate in one of the following ways:
CC= ratio of voltage to current in accordance with the
programmed value regardless of the input voltage
CV= ratio of voltage to current in accordance with the
programmed value regardless of the input current
CR= ratio of voltage to current while maintaining the
programmed resistance value
Constant-Current Mode
Constant-Resistance Mode
Constant-Voltage Mode
Constant-current/voltage/resistance regulation: the change in
the steady-state value of the stabilized electronic load input
voltage, current, or resistance resulting from a full scale
source change, with all other influence quantities held
constant.
Constant-voltage (CV) power supply: a power supply that
stabilizes output voltage with respect to changes in influence
quantities. Thus, for a change in load resistance, the output
voltage remains constant while the output current changes
by whatever amount necessary to accomplish this.
Load Current
Input
Voltage
Voltage
Setting
V
I
Input Voltage
Load
Current
Slope
(Resistance
Setting)
V
I
Input Voltage
Load
Current
Current
Setting
V
10%
0%
100%
90%
Slew Rate
Expected
Time
Actual
Time
Time
(microseconds)
Voltage (volts)
or
Current (amperes)
For more information in the U.S.A. call 1-800-452-4844
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App.
Info.