Ametek Amrel PLA 2U, Operation Manual

Page: 88 / 162

M470039-01 REV-F Page 87
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 activa ted (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 after 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.
STEP OPERATION SET-UP
Every time the Steppi ng mode is enabled, it is critical that you re -enter or double check for the correct amplitude
and time of each step programmed. Each step value and time can be check via front panel or remote command, i n
order to avoid initiating a n erroneous ste p. If the value is set higher than expecte d the system may perform
previous steps that may exceed the power rating for the a pplication and may damage the eLoad or power source.
Important Notes:
1) All steps must be in the same constant mode (CV, CC, CR, and CP). Stepping error will occur if different modes
are programmed.
2) All programmed steps must be saved before power cycling t he eLoad, otherwise the data will be lost.
3) When eLoad sees a step with a step time 0ms , it will stop executing further step numbers
WARNING
i
T
n+1
t0 t1 t2 t3 T4 t5 t6 t7 t8