LFE 2000 Series - Page 27

'J5)-ll
RI.IV
ii
l.1i
WIRING
PRECAUTIONS
Because
of
the
hith
resolution
and
low
level
signals,
and
to minimize
noise
pickup
that
can
be
encountered
during
the
calibration
or installation
of these
instruments.
the
use
of
short
twisted
pair
or
shielded
signal
input
leads
j-s
recommended,
Care
must
be
taken
on
all
uni.ts
to
ensure
that
a
good
earth
tround
connection
is
made.
1.12
SOLDER
BRIDGING
TECHNIQUE
The
following
method
is
recommended
for
a)
l,ocate pad
to be
bridged
and.
with
solder
on
the
tip
of
the
iron.
bridglng
solder
pads,
a clean
hot
soldering
iron, melt
a
b)
drop of
it over
Quickly
place
the
tip
of the
iron
down
to
the
other
side
bridging
the
gap
as il
to one
side of t
lustrated
in the
he
gap
and swlng
sketch
below:
SOLoER
I
TIP
soL0€R
PC
BO^RO
If the
tron
1s held
to
the
foils
too
long, they
will
heat
solder
to
flow
on the
foil
and will
not
allow
the brldging
A solder
bridge
should
only be
opened
up by
heating
the
solder
with
"Solder-Wlck"
or
equivalent.
PCB
foil bridges
may
be
opened
uslnt
a sharp
knlfe or
smarl
such
as a
"Dremel
Tooltt.
up enough
to cause
the
to occur.
area
and rernoving
the
portable grrnding
tool
LFE
Instruments
Drvrsion
-20-