Input Control; Transient Operation - Ametek Amrel PLA Series Operation Manual

Transient Level:
The transient level can be set at front panel or via digital interfaces. The electronic load input will switch between the
main level and the transient level when transient operation is turned on. During transient operation, the load will switch
from the immediate level to the transient level determined by the programmed slew time. When the load is in current
control mode, avoid the main level from zero. Because control circuits are potentially off.
Triggered Level:
The level can be preset (stored in the electronic load) allowing the input to be updated when a trigger is received. Trigger
level can only be changed via digital interfaces, and can be programmed to any value within the mode's range settings.
Slew Rate:
The slew rate determines the rate at which the input to the electronic load changes to a new programmed value. Slew
time (positive and negative) and level change can be set at the front panel or via the digital interfaces. To better
accommodate user applications, the positive and negative edge of the slew rate can be set independently. The
programmed slew rate remains in effect for the triggered and transient level changes previously described.

Input Control:

Short On/Off:
The electronic load can simulate a short circuit at its input by turning the load on with full-scale current. The short circuit
can be toggled on/off at the front panel or via the digital interfaces while Short On/Off is enabled. The short on/off
switch-over uses the slew rate setting of the active mode and range. The actual value of the electronic short is dependent
on the mode and range that are active when the short is turned on. In CV mode it is equivalent to programming zero
volts. In CC mode it is equivalent to programming full-scale current for the present current range. In CR mode it is
equivalent to programming the minimum resistance for the present resistance range.
Important Notes:
1) Turning the short on in CV mode may cause the load to draw so much current that the software current limit
triggers, which may turn the input off (Protection Mode).
2) It is dangerous to activate short operation when testing batteries or other DUT without current limit. The
eLOAD will act as an infinite current sink, and drain Maximum Current until severe damages occur to both the
DUT and eLOAD. In the worst case scenario, the DUT/battery could catch on fire or explode.
Turning the short circuit on does not affect the programmed settings, and the load input will return to the previously
programmed values when the short is turned off.
Input On/Off:
The electronic load's input can be toggled on/off at the front panel, or via the digital interfaces. Turning the input off
(zero current) does not affect the programmed settings. The input will return to the previously programmed settings when
the input is activated again.
Note: The input on/off command supersedes the mode and short on/off command.

Transient Operation:

Transient operation enables the electronic load to periodically switch between two load levels. Transient operation can be
turned on and off at the front panel or via the digital interfaces. Before y ou turn on the transient operation, you should set
the desired mode of operation as well as all of the parameters associated with transient operation under varying
combinations of load levels, frequency, duty cycle, and slew rate. Transient operation may be used in CC, CR, CV or CP
modes and can be continuous, pulsed, triggered, stepped or toggled. During transient operation, the load will switch from
the immediate level to the transient level determined by the programmed slew time. In cases where the transition from
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