INSTRUCTION
MANUAL
- MODEL
DLP
400-5-7
50A
10
3.4
PULSE
MODE
In
the pulse
mode
the
Dynaload
places
a
pulsating
square
wave
load
on
the
input
voltage
source. This
pulse
load
may
be
varied
from
0-5A peak
current
by
the
pulse
amplitude
control
on
the
front
panel.
The
frequency
may be
varied
from
approximately
500-5000Hz
by
the
pulse
frequency
control on
the
front
panel.
This pulse
load
may
be
superimposed
on
top
of
a
constant
DC
load,
which
may
be
selected
by
the DC load
control
on
the
front
panel.
If
the pulse
is
to be used
down
to
a
no-load state,
the
DC load
controls
should
be
turned
fully
counterclockwise.
The
maximum
total
of
the
pulse
and
DC
load
will be
limited
around
5.5A
by
the
internal
current
limit
protection.
3.5
SHORT
CIRCUIT
The
short
circuit
mode
is
for
checking
short circuit
and
recovery
from a
short.
It
places a short
in
series
with
the
ammeter
across
the
input.
It
should not be
used
directly
on
a
large
capacitive
voltage
source
or
large
batteries
as
the
relay
contacts
may
be
welded shut
by
the
instantaneous
current.
For
testing
short
circuit
of
a
large
capacitive
source:
A.
Place
the
Dynaload
in
the
.03A/V position
B.
Turn the
DC
load
adjust
fully
clockwise.
C.
Then
the
short
circuit
button
may
be
pressed.
D.
The
short
circuit
relay will
cause
the
input
fuse
to
blow
if
more
than
10A of
current
is
drawn.
