a displayed value ± 1999.
When
this is cx-
ceeded
the
display will show = ooo
or
===ooo,
and
the
next highest range should be sclected.
Positive overload always gives fiashing bars. A
small negative overload will also give fiashing
bars (with negative symbol),
but
a larger one
will give fixed bars.
Remember,
when
switched
to
resistance
the
display will show flashing overload until a
resistor lower
than
the
maximum reading
of
the
range is connected. Should fixed bars
appear
on
the resistance function, connecting a
resistor will restore normal operation -this is
not
a fault condition.
To
avoid damage:
A.
Never connect more
than
1000 volts to
the
DCV
= socket,
or
more
than
soo
volts R.M.S.
to
the
ACV
Vl
socket.
B. Never connect a voltage source directly
to
the
mA -nsocket.
C. Never connect
an
input
greater
than
the
maximum permissible overload (see
the
specification).
Selecting
a
Power
Source
The
meter operates from a standard 9-volt
battery.
If
possible a high power
or
Alkaline
type should be used -ask your dealer
if
in
doubt.
To
obtain long battery life the
meter
must
be
switched off whenever measurements are
not
beingmade.
The
condition
of
the
battery may be checked
as follows: Select x 10VDC
=and
connect
8
the
red
test
lead to the
DCV
socket. Remove
the
battery cover, switch
the
instrument
on
and
touch
the test lead
onto
the
negative
battery terminal.
With
a
new
battery
the
reading should be about - 3 volts;
if
it
is close
to
zero
or
is positive
the
battery should be
replaced.
CAUTION
-Never leave a weak
or
dead
battery
in
the
instrument. Even 'leakproof'
types can leak chemicals
that
may
cause
permanent damage
to
the
instrument
-this
will void the guarantee.
When
continuous operation is required
the
meter can be operated from AC power via
an
optional AC adaptor. Plugging this
into
the
socket
on
the
back automatically disconnects
the
internai battery
and
increases
the
display
brightness.
For
safety reasons only
an
approved adaptor
may be
used;
use
of
any
other
will void
the
guarantee.
In
sorne countries
the
correct
Sinclair adaptor may
not
be
available
in
which
case
the
dealer will supply
an
alternative
approved unit.
Sat"ety
Precaution
This
instrument
has
been
designed
to
the
highest safety standards,
but
safe operation
depends
on
the
user so we recommend
the
following rules.
1.
Never connect a voltage
to
the
instrument
which causes the common terminal
to
be
raised
more
than
1000 volts
DC
or
700
volts
AC
RMS
above
earth
ground.
2.
Never
use anything
but
an
approved AC
adaptor
to
power
the
instrument.
9
