Gossen MetraWatt lunasix - Checking the Batteries; Zero Point Control

Checking
the
Botteries
With normol
use of the
LUNASIX,
the 2
Mollory
mercury
botteries
supplied
with
it hove
life
of
obout lUz
lo 2
yeors.
Check
the
condition
of
the
botteries
from
time
to time,
os follows:
push
the knurled
plote
(19)
in the
direction
of
the
orrow
without
pressing
the
tumble
switch
(t2).
lf the
poinler (4)
does not
move
to the
red mqrk
(10),
the
botteries
must
be reploced.
Open
the bottery
comportment
(18)
wiih
o coin.
Check
the new
botteries
olso os
described
qbove.
Tero
Point
Control
When checking
the
pointer
zero
control,
lhe
boileries
musl
be
token
from
their
comportment.
Then
press
the
tumble
switch
(12)
up
or down
ond
the
pointer
should
come to rest on the
block
mork
ot the
left-hond
side
of the
scole
(3).
lf
not,
the
pointer
(4)
must
be sel
to the
block
mork
by
furning
the
zero-point
control
screw
(21)
on
the
underneoth
side
of
the LUNASIX.
While
this is
being
done,
the
tumble
switch
must,
of course,
be
pressed
os
otherwise
the
pointer
would
be locked.