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Model 5528A
Controls,
Connectors,
Indicators
To
Enter
A Material Temperature
See "G
ENERAL" information for
SET
UP
keys,
above.
NOTES
1.
The Measurement Display unit
accepts a
manually-entered
MATL TEMP
value
on ly
when
no
Material Temperature
sensor
is
connected
at
ils
rear ptlncl
.
2.
The
M
easu
rement Displa
y
unit
assigns
any
manually-entered
MA TL
TEMP
value it
accepts
as
the
"
average"
MA
TL TEMP
value.
3.
The
allowable
range
of values
fo
r MAli. TEMP
is
-
4.
If no
Material
Temperature sen sor
is co
nnected to the
Measure-
ment
Display,
and you
do not
manually
enter
MA TL TEMP value
,
the
"standard"
value (20°C, 68°F
)
is
automatica
lly assigned.
If
you try to
enter
a material temperature
va
lu
e
while a Material Temperature sensor is connected
to the Measurement Di spla
y
unit,
the
value
you
enter will
be ignored, and the
average of
the
temperature(s)
from
all
co
nnected Material
Temperature sensors
will
be
used.
Since
the
averaging
process ca
n take up
to
3 seco nds,
pressing
MAn TEMP
shortly
after
you
" enter"
a
temperature in
this case may
allow the
entered temperature
to be seen for a
short
l
ime.
The only
exception to the
above statement
is when a
senso
r
error occurs,
due
either
10
an "out
-
of-
ran
ge"
condition
or a
malfunction
.
When thi
s
type
of error occurs, a
se
nsor
error
message
is
displayed
.
The next
time
you
press
MATL
TEMP,
an
"
ERROR"
will
be
displa
yed,
indicating a
problem
wi
th
onc
of the
sensors. Successive
pressings of
MA TL TEMP
wi
ll
cause
readings from
"good" se nsors
to be
displayed,
in
the
usual
sequence; there
will
be
no
reading
from any
"
bad
"
sensor,
just
as if
the sensor
was
not conn ected
.
More About the V.O.L. key
The
V.O .L.
key is used to display
or
ent
er
the
"
Velocity-of-Ligh
t" Compensat io
n number. The
V.D.L.
number
is
used by
th
e Measuremen
t
Displa
y
unit
to
correct for
the
chan!::!:!
in laser
wavelength due to atmospheric conditi
ons.
The
V.O.L. number used
by
th
e
Measurement
Display
unit
is "
O
.999abcd", however,
only
the
" abcd"
part
o
f
this
number
is disp
layed
on
th
e
Measurement Di
splay
unit, in the form
" abc. d". The
Measurement Display
unit
multiplies
measurement data
by
the
V.D .L.
Compensation
number
befo
re the data
is
di spla
yed.
Velocity-
of-Light
Compensat ion
is
necessary
for Distan
ce
and
Velocity measurements
onl
y.
The
V.O
.l
.
number
is
derived
from
measu rements
provided
by
the
Air
Sensor.
If
the Air
Sensor
is
not
used,
the V.D .L. number
defaults
to
"728.8".
The
DEFAU
LT VAL UE
(726.6
)
corresponds
to
20
degrees C
(66
degrees
F) air
temperature,
760
mm (29.921 in
ches) HIS
air
press
ure, and
SOX,
relati
ve
humidit
y.
16-11
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