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A-7
PISTON PRESSURE GAUGE PRESSURE CALCULATION WORKSHEET (ENGLISH UNITS)
Date
Expected Temperature, (t)
o
C
Reference Plane Difference, h inch A
o(t)
= A
o(23)
[1 + c(t-23
o
C)] inch
2
Mass Set Serial No. Local Gravity, g
L
cm/sec
2
Piston Serial No.
Air Density,
ρ
air
g/cm
3
lb/in
3
A
o(23)
= A
o
at 23
o
C inch
2
Gravity & Buoyancy, K
1
b
1
/psi Tare, Apparent Mass pound
b
2
/psi
2
Reference Pressure, P
R
mtorr psi
c /
o
C
1 2 3 4 5 6 7 8 9 10 11 12 13
P
B
NOMINAL
PRESSURE
ρ
medium
(Mass
Density)
ρ
W
=
(ρ
medium
-
ρ
air
lb/in
3
)
x
g
L
÷ 980.665
P
H
=
ρ
W
x h
P
A
=
P
B
+ P
H
- P
R
1 + b
1
P
A
+ b
2
P
A
2
A
e(t)
=
A
o(t)
x
Column 6
F =
P
A
x A
e(t)
M =
F x K
1
Masses to
be used
Remainder Remainder
Temp. Coef. =
Column 9 x
453.59237 x c
psi lb mass/in
3
Lb force/in
3
psi psi in
2
lb force lb mass Tare Plus lb mass grams g/
o
C