Ametek Amrel PLA 2U, Operation Manual

Page: 118 / 162

M470039-01 REV-F Page 117
5. Step Mode Modification
The Step Operation for the eLoad has been modified to provide 256 set points for the step operation. In the
older version firmware, the 256 set points are separated into 4 profiles of 256 steps, which limited the amount
of total programmable step set points. The latest firmware revision combines all set points into a single profile
of 256 steps
STEP MODE
In step mode, the eLoa d generates customized sequence of different input levels up to a maximum of 256 steps (points)
for ea ch mode, with dwe ll times from 1ms to 65535 ms. The step sequence ca n be cycled for one up to 65535 count(s) or
infinity for unlimited repea t. At the end of the step cycle count, turn tra nsient leve l off a nd then on to resta rt the step
cycle a nd count.
STEP: The Step mode will repeat the step cycle until the end of the dwell time without the need for a trigger
signal. Once transient level is activated, the STEP mode will start as well.
STEP AUTO:
The Step Auto mode will traverse through the user-defined step cycle until the end of the dwell
time upon the receiving a trigger signal.
Note: When triggering the STEP AUTO function via the front panel, when the step is activated (it will show “AUTO”),
the step cycle will repeat itself until the end of the Step Parameter setting. If the STEP AUTO function is triggered via
PC, the step has to be triggered using a *TRG or TRIG command af ter the transient level is turned on.
STEP ONCE: The STEP ONCE function will only activate the first step in the step cycle until the next
trigger signal is received.
Note: For front panel operation, the STEP ONCE function will only activate the first step in the step cycle. For PC
operation, by sending a *TRG or TRIG command with transient on, the next step in the step cycle can be activated.
Typica l Applica tion: Simula ting ba ttery dra in for testing portable, ba ttery powered products. A cellula r phone, for
example, ha s complex ba ttery discha rge cha racteristics due to its different opera ting modes. A loa d profile ca n be crea ted
using the eLoa d loa d to simula te those cha ra cteristics.
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