2
The
Farnell
TOPS
3D
provides
in
one handy package, three
power
supplies
and
digital
meter
monitoring
of
voltage
and
current.
INTRODUCTION
A
10
turn
potentiometer
is
used
to
adjust the bipolar outputs
of
the 1
amp
supplies
from
5
to
17
volts
whilst a
single
turn
potentio
meter
is
used
on
the 4 amp supply
to
adjust the output between
4
and
6 volts.
Current
limit
is
incorporated
on
the
bipolar
1
amp
outputs.
On
the
4-6V
4
amp
output
foldback
current
limiting
and
SCR
overvoltage
protection
is
included.
All
three
outputs
are
provided with an
output
on-off switch and
anled to
indicate
current
overload.
Any
one
of
the
three
outputs
can
be
monitored
for
voltage and current simultaneously using
the internal digital meters,
by
depressing the appropriate
push
button. Additionally the voltmeter can be switched
to
measure
external voltages.
504
OD0
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