Mod
el
5528A
V.O.l.
Compe
nsation Factor
19-4
Where
PAB
S is the absolute pre
ss
ure.
an
d
PAD
J is the adjusted pressure.
Note that the altitude
of
the weather
stat
ion is not considered here, sin
ce
the number they report
has
alre
ad
y been corrected to
sea
l
eve
l by the station.
3. U
SE
OF COMPENSATION CHARTS
In
mo
st
cases,
you will find the velocity-of-light co
mp
en
sa
tion
numb
er thaI is to
be
entered
manually
so
mewhere in Table
19
-3
through
Table
19-52.
If you
ca
n't find your
mea
surement
conditions in
any
of
the
se
tabl
es,
yo
u will
hav
e to
calcu
late the compen
sa
tion factor. Instructions for
doing
this are pre
se
nted below.
The
v.o.l.
co
mp
ensation value tables are divided into a " metric" group (Table
19
-3
through Table
19-2
7),
and
an
"English"
group
(Table 19-28 through Table
19
-52).
This
is
done
as
a convenience for
you, since the
V.O.l.
compensation
number
is a ratio (without unit
s)
that is the same, regardless of
the
mea
surement
sys
tem you are usin
g.
Table
19
-3
and Table
19
-28 are wide-range charts offering
coa
rse
compensation numbers for non-
precision
mea
su
rement
s.
Table
19
-4
through Table
19
-27,
and
Table
19
-29
through Table
19-52
are
more-detailed charts, progressing from
" l
ow"
to " high" altitudes,
and
from " low" to " high"
relative
humidity
.
To
find the
V.O.l.
appropriate co
mp
ens
ation
fa
ctor table, refer first to Table 19-210 find the group
of
tabl
es
for your
humidit
y and altitude. Then look
at
the headings for tho
se
tables to find the one
for your temperature range.
You'll find the compen
sa
tion number where the row and column for
your
mea
surement conditions inter
sec
t.
If
the table you should be using doesn't
have
the
exact
value for your
mea
surement, you c
an
ca
lculate the value you need by interpolating between the
values given.
Table
19
-2. Guide to
Compe/1sation
Table
s
Rel
at
ive Al
ti
tu
de
Table Num
be
r
Humidity
Ki
lll
ge
M
et
r
ic
Eng
li
sh
(N
O
TE
1)
(NO
TE
2)
50% Wide
J lB
20
%
low
4
-7
29-32
20
%
Hi
gh
8- "
33
-3
6
50%
low
12-15
37-40
50%
Hi
gh 16-19
41
-
44
60%
l ow
20
-
23
45
--48
60%
Hi
gh 24-27
49- 52
NOTES
1. "
low
" altitude -
720-800
mm
Hg
, 27-31
in
Hg
"
Hi
gh"
al
Titud
e
,..
640- 720 mm Hg. 23-27
in
Hg
2.
For
comp
lete table
reference
dc~ignation
,
add
"Table
19
-"
to
number
li
s
ted
below.
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