M odel 5526A
Fi
rst
lo
ok
2-24
1
6.
Change the M ater
ia
l
Te
mp
era
tur
e
va
lu
e to
25
D
C
by
pr
ess
ing -
00
~
~
No
te the new rea
di
ng.
Th
is shows the importan
ce
of h
avi
ng th e correct Materi
al
Temperature
an
d Exp
ans
ion CoeHicient v
al
ues
wh
en
you are making a distan
ce
meas
ur
e·
men\.
1
9.
Chan
ge
the
unit
s of meas
ur
ement by
sw
it
ching the rc
ar
·panel ENG
LI
SH/ MET
RI
C switch to
its
ENG
LI
SH posllion.
CAUTION
This s
wit
ch h
as
a l
ac
k to k
ee
p
it
from accidenta
ll
y be
in
g moved.
To
avo
id
damag
in
g the switch. pull
it
s handle
"o
ul"
whil
e you
arc m
ov
in
g
it
from
one
pos
iti
on to the other. Releas
in
g the
handle
allows
it
to lock In
li
s new positio
n.
No
te th at th e valu
es
h
ave
changed from metric to English un its, when
yo
u
pr
ess
the foll
ow
ing
keys
-
[
RES
Oj
~
~
~
U
Resolution wi ll n
ow
be five pl
aces
,
ins
t
ea
d
of
four.
Ma
teri
al
Temperature will now be
75
.
97
D
F.
The
ex
p
ans
ion coefficient will n
ow
be
55.6
(times 10 e inch/ degree F
).
Making an Angular Meas
urement
1. Re
pl
ace the
line
ar Retroreflector with the Angul
ar
Ref
ledor,
by unscrewing the t
wo
long
sc
rews on the Height A
dj
uster.
P
os
ition t he Angular Reflector
so
its label is on top and i
ts
Retroreflectors f
ace
the L
ase
r Head.
Be s
ur
e
yo
u do n
ot
m
ove
the Height
Adj
uster
ar
the B
ase
while
yo
u are making thi
sc
han
geof
Opti
cs.
2. Re
pl
ace
the
linea
r Interferometer
wi
th the Angular Interferometer by u
nsc
rewing the t
wo
long
sc
rews on the Height Adjuster.
P
os
it
io
n the
Ang
ul
ar
Int
e
rf
erometer
so
the si
de
with t
wo
openi
ngs
faces
the Ang
ul
ar
Reflector, and the s
id
e with
one
ope
ni
ng f
aces
the
l.
aser H
ea
d.
Be s
ur
e you do not move th e Height Adjuster or th e Base while you are making this change of
O
pti
cs
.
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