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Model 5528A
Conlrols,
Connectors,
Ind
icato
rs
M
::::'-':='-=
1
·_
·,-
-*':.,,::;r.:'-"
1.
LASER ON
Indicator: Indicates when
Laser Head
is
receiving
power from
Measurement
Display
unit.
2.
SIGNAL
Indicator:
Ind
icates
that Laser return beam
is
strong
enough for
a
measurement.
3.
LASER
EXIT
PORT
: Sou rce
o
f l
aser
beam
for all
measurt!ments. Also,
destination
of
Laser return
beam for
Straightness measurements.
WARNING
LASER RADIATION IS EMITTED FROM THIS
PORT.
DO NOT STARE INTO THE
BEAM.
4.
LASER RETURN
PORT: Dest
ination
of
Laser return
beam
for
Distance,
Velocity,
and Angu lar
measu rements.
5.
APERTURE
CONTROLS
:
These
are
located
behind
both
ports in the
turret.
The
Exit
Port's
aperture conlrol
has
three
positions -
large
opening.
small
opening,
and d
osed. The
Return
Port's
shutter
has
two
positions
-
open and
dosed
(which
displays a
tarst!tllsed for
alignment).
6.
TURRET
RING:
A two-position
selector
that
switches
elements
in
the hit
and Return
beam
paths,
depending on
whether
a
"STRAIGHTNESS"
measuremen!
is
being made.
7.
READY
Indicator:
Provides
a general indication
o
f the laser
's
operating
status. "OU"
for about
the
first half
of
the
warm-up time; blinking
during
Ihe last half
(approximatcly)
of
the
warm·up
time; "O n" steadily
when
Laser
tubc is fu
lly
warmed up
and
ready
for
usc.
Figure
16-3. Laser Head
- Frollt alld
Rear
16·
5
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