AMETEK PLA-PLW - Manual (Page 15)

Triggered Level:
The level can be preset (stored in the eLOAD) allowing the input to be updated when a trigger is received.
The 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 eLOAD changes to a new programmed value,
usually defined as Adc/μs. Slew time (positive and negative) is the amount of time it takes for the eLOAD to
change from the immediate (main) level to the triggered/transient level. To better accommodate user
applications, the positive and negative edge of the slew time can be set independently via the front panel or
through digital remote programming.
Input Control:
Short On/Off:
The eLOAD can simulate a short circuit at its input by activating the load 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 active mode and range when the short is activated. In CV mode it is
equivalent to setting zero volts. In CC mode it is equivalent to setting 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) Activating the short operation in CV mode may cause the load to draw excessive current that will trigger the
software current limit, which will 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 a near-short current sink, and drain Maximum Current. Severe damages can occur to both the DUT
and eLOAD.
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 eLOAD’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.
Transient Operation:
Utilizing an internal transient generator, the eLOAD provides a robust set of transient operation modes to
periodically switch the eLOAD between two load levels. Transient operation can be activated using the front
panel or via the digital interfaces. Before you turn on the transient operation, you want to 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 eLOAD
will switch from the immediate level to the transient level determined by the programmed slew time.
Continuous Transient Operation
The built-in transient generator produces a pulse train to control the eLOAD in dynamic (transient) operations.
Adjustable parameters include, rise/fall time, frequency and duty cycle. In CONTINUOUS transient operation,
the eLOAD switches between the immediate (main) level and transient level according to parameter settings.
Pulsed Transient Operation
Generate a load change that returns to its original state after a time period SINGLE key or SCPI commands.
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