INSTRUCTION
MANUAL
-
MODEL
DLP
400-5-750A
6
K.
If the DC input
fuse blows, or
if
there
is no
indication
of
source
voltage,
check
the
external
hook-up
wiring
to
see
that all
connections
are
tight
and
secure.
L.
To
increase
the
load,
turn
the
load
adjust
controls
slowly
clockwise
until
the
appropriate
load
is
obtained.
M.
The
meter
range
switches
may
be
switched to
the
lower
scale
positions
if
greater
accuracy
is
required,
and
external
instrumentation
may
be
used
to
obtain
further
accuracy
and
eliminate
the
effects
of
leakage
currents
in
the
Dynaload
or
line
voltage
drops
at
high
currents.
3.1
CONSTANT
RESISTANCE
MODE
(AMPS/VOLT)
Two
scales
are
provided:
0-.01A/V and
0-.03A/V.
Minimum
resistance
on
the
0-.01A/V
is
100
ohms,
and minimum
resistance
on
the
0-.03A/V is 33
ohms.
Let
us
assume that
we
wish
to
test
a
100V
source
with
a
100
ohm
resistive
load
.
A.
Set
the mode
selector
switch to
the
0-.01A/V
position
and
connect
the
source
as
previously
described.
A
B.
After
checking
the
initial
readings of
the
meters,
adjust
the
voltmeter
to
the
0-180V scale and
the
ammeter
to
the
0-1.
8A
scale.
