180
PPM
：
-100
～
+100 PPM (Feet length 1PPM)
PSM
：
-100
～
+100 mm (Feet length 1mm)
※
2) The instrument will calculate PPM according to the entered Temperature and Pressure.
15. CHECK AND ADJUSTMENT
This
instrument
has
undergone
a
strict
process
of
checking
and
adjustment,
which
ensures
that
it
meets
quality
requirement.
However,
after
long
periods
of
transport
or
under
a
changing
environment,
there
may
be
some
influences
on
the
internal
structure.
Therefore,
before
the
instrument
is
used
for
the
first
time,
or
before
precise
surveys,
user
should
launch
check
and
adjustment
introduced
in
this
chapter
to
ensure
the
precision
of
the
job.
15.1 PLATE VIAL
Check
Please
refer
to
Chapter
3.2
“Leveling
by
Using
Plate
Vial”
Adjust
1.
Adjust
leveling
screws,
make
plate
bubble
centered;
2.
Rotate
the
instrument
180°;
watch
the
offset
of
plate
level;
3.
Tweak
adjustment
screws
(on
the
right
of
the
plate
vial)
with
the
correction
pin
to
make
plate
bubble
to
move
half
of
the
offset
back;
4.
Rotate
the
instrument
180°,
check
adjustment
result;
5.
Repeat
the
above
steps
until
the
plate
level
is
centered
in
all
directions.
15.2 CIRCULAR VIAL
Check:
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