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2
.!
INSTALLATION
The
TF
2337A Automatic
Distortion
meter
is
available only for
bench mounting.
Normally
set
on''four
rubber
feet, the
instrument can be
used
in
the
tilted
position
by swinging
the
carrying handle forward
and
downwards
until
it
is
positively located
in
tlie
vertical
position.
The
handle
then acts as a
tilt
stand.
2.2
POWER
SUPPLY
The
instrument
is
normally
supplied
ready
for
use
with
230
V
a.c.
mains
supply.
Before connecting
to
the
mains
supply
ensure
that the
mains
voltage
setting
is
correct
and
the
correct
mains
fuse
is
fitted
as
follows
:
-
Mains
supply
95-125
V
a.c.
190-250
V
a.c.
2.2.1
Mains Transformer Tapping
Fuse
rating
0.
2
amps
0.
1
amp
MI
Part No.
FPP/2337A/23401
FPP/2337A/23402
VOLTAGt
RiNC-e
SHORnNG
TAPPING
•iD
-lev
A* 0 0
1
A,y
A-0
C-P
A.c
180
-'220
0--O
A.i:
20'/
-
2b)
C-D
A.r
Fig. 2.1
Mains transformer
tappings
To
adjust
mains
voltage setting
proceed
as
follows
:
(1)
Remove
the lop
cover
of
the
instrument by ruieasing
the
two knurled knobs
located
on
each
side of the
instrument.
(ii)
Locate
the
mains transformer
situated
in
the top right
hand
corner.
(iii)
Check
that
thetapping
is
as
illustrated
in
Fig,
2.1
for
230
V
a.c.
(iv)
If
an alternative
setting
is
required,
adjust the
transformer
tappings as
indicated
in
the
adjacent
table.
NOTE
;
An
orange wire from
the indicator
lamp
(PLl) on
the front
panel
is
connected
to
the
mains transformer
terminal
(B).
This
lead
should
not
be
moved
as
it
also supplies
the
100
V
working
voltage
for the
neon lamp.
8
I'F
2337A
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