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2-10 PRODIGIT
2-15. Load current slew rate setting.
What is the load current slew rate during load current level change, power supply turn
ON/OFF switch between ON, and OFF? The 33501 Series Electronic load provides all of the
above load current slew rate in controllable condition, the rise and fall current slew rate can
be set independently from front panel operation or remote programming.
The slew rate determines a rate at which the current changes to a new programmed value.
The slew rate can be set at the front panel or via GPIB on the rear panel of 33501 Series
high power load.
The rise and fall slew rate can be independently programmed from 160mA/usec to 10A/usec
(33501 Load) in the 240A current range and from 16mA/usec to 1A/usec in the 24A current
range. This allows a independent controlled transition from Low load current level to High
load current level ( Rise current slew rate ) or from High load current level to Low load current
level( Fall current slew rate ) to minimize induced voltage drops on the inductive wiring, or
to control induced transients on the est. device ( power supply transient response testing ).
This controllable load current slew rate feature also can eliminate the overload current
phenomenon and emulate the actual load current slew rate at turn ON the power supply
under test. Fig 2-6 shows the load current slew rate is according to the power supply's output
voltage, load level setting and Load ON/OFF switch. So, you could do all items of power
supply testing task by using Constant current mode only, it can significantly improve the
testing quality and process as well as efficiency.
There are two load current range in 33501 Load, Range I and Range II, the slew rate of
range I, range II, RISE/FALL slew rate are listed in chapter 1-5 specifications.
Fig 2-11 The relationship of load current load ON/OFF, load level and output voltage of DC power
V
LOAD
ON
ON
OFF
I
H
I
L
HIGH
HIGH
LOW
supply at turn ON
(A)
POWER SUPPLY
TYPICAL
VOLTAGE
OUTPUT
T
(B)
ON
LOAD ON/OFF SWITCH
(C)
LOAD CURRENT WAVEFORM
WITH DIFFERENT LOAD
CURRENT SLEW RATE
T
(D)
LOAD LEVEL CHANGE
BETWEEN HIGH AND
LOW LOAD LEVEL
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