3310F Series Operation Manual 31
NOTE1: CC/CR/CP MODE is controlled by Load ON voltage, CV MODE is not
Controlled by Load ON voltage.
NOTE2: If Load ON voltage Setting 0V, load OFF voltage has to setting to 0V.
NOTE3: The programmed load ON voltage for model 3310F, 3311F, 3315F
Load module is from 0 to 25V, model 3312F is from 0 to 50V, and
Model 3314F is from 0 to 100V.
Setting Load OFF voltage, the middle of the 5 digit LCD display will show
"LDoFF", lower the 5 digit LCD display will show settings value, the units is V,
The Load OFF Voltage set range from 0.0V to 24.9V step 0.1V by rotating the
Setting knob.
if the load input voltage is less than Load OFF setting voltage, the electronic
load to load off.
Set Load polarity, the middle of the 5 digit LCD display will show "POLAR",
lower the 5 digit LCD display "will show + LOAD" or "-LOAD", use the knobs
and key settings "+ LOAD" or "-LOAD".
Setting MPPT , the middle of the 5 digit LCD display will show "MPPT", lower
the 5 digit LCD display will show settings value
The MPPT set CC/CR/CV mode by rotating the Setting knob, Detailed
parameters required by the REMOTE input (see 330XF manual).
The MPPT algorithm for 3310F series DC Load
Many photovoltaic (PV) devices, such as PV panels and concentrated photovoltaic (CPV)
modules, require outdoor testing for design verification, durability, and safety. A low cost means
of testing the output power of PV devices outdoors is to use DC electronic load; it provides high
power-handling capability at a low cost.
Often one of the main functions of outdoor PV testing is maximum power-point tracking (MPPT).
But because eloads are general-purpose instruments, it is up to the PV test engineer to
implement an algorithm in test software to perform MPPT.
Fortunately, there are a lot of MPPT algorithm you can choose from, with more than 19
published papers on the implementation and performance of different MPPT algorithm.
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