21
CURR:LOW 5 Sets transient current low level to 5A
CURR:HIGH 10 Sets transient current high level to 10A
TRAN:RTIM 100us
Sets the time for transient rising edge to 100us
TRAN:FTIM 200us
Sets the time for transient falling edge to 200us
TRAN:MODE TOGG Selects toggled operating mode
INPUT ON
Turns on the input
INIT
Initialize the trigger
Get the trigger by receiving an external trigger signal. Figure 2-8 shows the current waveform of
the load before it is triggered and after it has been triggered respectively: the electronic load starts its
operation at the transient low level (5A) when the input is turned on. For the first trigger, the load
current reaches and remains at the high level (10A) after 100us duration of rising edge. When the
second trigger is received, the load current will reach and remain at the low level (5A) after 200us
duration of falling edge. Each trigger leads to one toggle operation.
Fig. 2-8 Toggled Transient Operation
2.5
List Operation
Besides Transient operation, the electronic load provides more flexible list operation, which can
make the load operate according to the preset sequence
.
The list operation allows you to
program
a series of sequence steps, and the operation mode, the
load values, the duration time for each step can be set. The sequence operation can be executed in the
CC, CV, and CR modes. The minimum duration for each step is 10us, and the maximum one is
99999.99999s (around 27.78 hours). The list operation allows to be executed cyclically, and the cycle
times can be set; the different list can be chained so that when one list has been executed, the another
chained list will be enabled, which further perfects the capability of the list test to implement more
complicated test task. Each list can contain 50 steps at most, and the load can store 7 lists.
The
associated
parameters of list operation can be edited and set through list operation menu or
via remote command. The load provides convenient list editing function. When the user is operating
input/edit sequence step, it is easy to check the previous and subsequent steps, and it is allowed to be
edited, inserted, and deleted immediately, which simplifies the list input operation effectively.
The set value of each step will be automatically saved when exiting from step edit menu, and the
other list parameters will be saved immediately after been edited.
The list operation also can be implemented via the remote command.
Please make sure the transient operation has been disabled before enabling list operation. In list
operation, if the operation mode for next step is different from the present step, the load will
automatically have a 5ms-delay after the present step is over to avoid the probable current surge. The
load’s input will be turned off during this 5ms-delay.
