Local Operation
3-55
3.13 DC Load Simulation -- Constant Resistance
Mode
Figure 3-12 Constant Resistance Mode
In CR mode, the Load will sink a current linearly proportional to the input voltage in
accordance with the programmed resistance. To prevent the load current change caused by
the input voltage variation, the power source impedance should be as low as possible.
Slew rate determines the rate that the load level changes from one state to another.
Slew Rate (Rise, Fall A/ms):
Slew rate determines the rate at which the current input of changes to a newly programmed
value. There are two slew rate values, which are rise rate and fall rate.
The CR mode can be set by
CR
key in the front panel, users can press the arrow key to select
the setting parameters on the LCD display, including resistor value, slew rate (rise, fall A/ms),
and I
p
(max). Users can type the values with the Entry keys.
R s e t = 4 0 . 0 A = 1 0 0 A / m s = 1 0 0 A / m s
I p ( m a x ) = 1 0 0 . 0 A
V = 0 . 0 0
P = 0 . 0 0
I = 0 . 0 0
D C
The procedures of setting
R
set
= 30.0
,
Rising slew rate = 105
,
Falling slew rate = 105
, and
I
p
(max) = 25.0
, are described as below:
1. Move the cursor to the command line of “R
set
=”.
V
Input
Voltage Slope
(R setting)
I
Load Current
