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Connect
the
measurementheference
cable
assembly
to
the
laser
head
and
receivers.
Connect
the
reference
leg
to
the
REFERENCE
SIGNAL
connector
on
the
laser
head
and
the
measurement
leg(s)
to
each
receiver
connector.
g.
Apply
system
power
and
verify
that
the
laser
head
emits
red
light.
D O
NOT
VlEW
THE
LIGHT
DIRECTLY.
Instead,
place
a
white
paper
or
card
in
the
beam
path
and
view
the
beam
reflection
on
the
white
surface.
h.
Take each receiver, in turn, and position it in front of the laser so that the laser beam
i s centered on the receiver photodetector. Be sure to rotate the receiver around the
laser beam axis to a point where one of its flat sides rests in the same plane a s the base
of the laser head. False indications can otherwise result. Verify that the LED on each
receiver lights and the voltage at the receiver test point is between 0.6 and 1.5V dc.
i.
Block the laser beam and verify the LED indicator goes out.
j.
Verify that the system controller is working properly. Refer to the applicable manuals
for checkout and diagnostic procedures.
k.
Remove system power and disconnect all equipment.
5.4
INSTALLATION A N D ALIGNMENT OF LASER HEAD, RECEIVER, AND OPTICS
The
proper
installation
and
alignment
of
the
laser
head,
receiver,
and
optics
is
one
of
the
most
critical
procedures
in
the
installation
of
the
Laser
Transducer
System.
For
this
reason
an
entire
section
(Section
1 1 ) is
devoted
to
considerations
of
proper
measurement
path
layout,
sources
of
error,
mounting,
beam
protection,
and
alignment
techniques.
Only
after
you
have
carefully
read
Section
II
and
have
laid
out
a
measurement
path
should you
attempt
to
install
the
equipment.
a.
Install
the
laser
head,
receiver,
and
optics
in
their
preplanned
positions
using
the
mounting
instructions
contained
in
Section
II.
b.
Run
the
measurementheference
cabling
a s
planned.
Be
very
sure
that
there
i s
no
possibility
of
the
cable
binding
during
machine
operation.
Connect the
reference
leg
to
the
REFERENCE
SIGNAL
connector
on
the
laser
head
and
the
measurement
leg(s)
to
each
receiver
connector.
c.
Install
the
+15V
and
+5V
power
supplies.
Refer
to
the
applicable
manuals
for
dimen-
sions
and
mounting
instructions.
d.
Connect
the
+15V
power
cable
between
the
+15V
power
supply
and
the
laser
head
POWER
connector.
Again,
be
very
sure
there
is
no
possibility
of
thecable
binding
during
machine
operation.
e.
Connect
the
f15V
power supply
to
a
suitable
source
of
ac
power
and
apply
system
power.
f .
Verify
that
the
laser
head
emits
red
light.
DO
NOT
VlEW
THE
LIGHT
DIRECTLY.
In-
stead,
place
a
white
paper
or
card
in
the
beam
path
and
view
the
beam
reflection
on
the
white
surface.
NOTE
The sequence of the following steps will depend upon the pre-
vious decisions you have made regarding the measurement
path. If you need laser beam protection such as conduit and
junction boxes, you will need to decide whether it will be
easier to install the beam protection first and then align the
system or vice-versa.
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Troubleshooting
