Farnell TSV 70 - Operating Instructions; Mains Input Configuration; Front Panel Controls; Meters and Indicators

MAINS INPUT.
The transformer tapping should be set to correspond
to
the
mains
input
voltage
from
which
the
unit
is
to
be
operated. (Units are normally supplied for 240 volt
operation). The transformer connections for other input
VOltages
are
shown
in
fiqure
1,P13.
In
order
to
change
the
transformer tapping the bottom cover of the unit must be
removed. This is achieved by removing the four fixing
The bottom
SCrewS in the rear panel, and removing it.
FRONT PANEL.
Mains
input
is
applied
to
the
unit
by
the
three
cored input lead at the rear.
The
cable
connections
are
BROWN-LIVE, BLUE-NEUTRAL, GREEN/YELLOW-EARTH.
INPUT ON/OFF SWITCH.
SECTION_ 11
OPERATING NSTRUCTIONS
This
connects
the
mains
input
to
the
unit,
indication
of mains is given by the neon lamp above this switch.
VOLTAGE ADJUST, COARSE AND FINE CONTROLS.
RANGE SWITCH.
These provide continuous adjustment of output voltage
from zero to maximum output. The maximum is determined by
the setting of the "RANGE" Switch. The overage of the fine
Control is approximately 35OmV on the 35V range and 70OmV on
METERS.
This
selects
the
output
range
of
the
unit
the
left
hand setting being O-35V 10A, and the right hand setting being
Q-70V 5A.
CURRENT LIMIT CONTROL.
These monitor output voltage (left hand) and output
current (right hand). The meter full scale ranges correspond
35 volts and l0 amp
to
the
setting
of
the
range
switch.
ranges are marked in black and COrrespond to the 35 Volt 10 amp
70 volts and 5 amps are marked
setting of the range switch.
in red and correspond to the 70 Volt 5 amp setting.
This sets the point of maximum output current and may
be adiusted from zero to 5.5 Amps or ll Amps depending on the
setting of the "RANGE" Switch. If this control is set to
give a current on the 10 amp range, the same setting would
give rise to hal£ the current on the 5 amp range. The
current limit point may be set by short circuiting the output
terminals and adjusting the current limit control to give the
reguired limit current as indicated on the output current meter.
- 2 -
COver may now be withdrawn from the rear of the unit.
the 7OV range.