RUSKA 2465A-754
Users Manual
A-4
F.
Column 2 is the mass density of the pressure medium being used in the piston
pressure gauge system. For hydraulic piston pressure gauges, this number can be
considered constant for all pressures. Fluke Calibration has two types of hydraulic
piston fluids available. One is a Spinesstic 22
™
part number 55-500 which has a
density of 0.031 pounds per cubic inch (858 kilograms per cubic meter). The other is
a Dioctyl Sebacate (DOS) part number 55-521-1 which has a density of 0.033 pounds
per cubic inch (913 kilograms per cubic meter). For gas medium piston gauges, the
values in Column 2 will be different for different system pressures. Equations are
provided to calculate the density of air or nitrogen as a function of the system
pressure.
G.
Column 3 is required to adjust the mass density of the pressure medium for local
gravity. It is also used to correct the pressure head that exist between the reference
ports of the piston gauge and device under test.
H.
Column 4,
H
P
, is the pressure correction that is required if the reference plane of the
device being calibrated is not the same plane as the reference plane of the piston
pressure gauge. The difference between the two planes,
h
, is positive if the
reference plane of the device being calibrated is higher than the reference plane of the
piston pressure gauge.
I.
Column 5 is the pressure required at the reference plane of the piston pressure gauge
to produce the desired pressure at the reference plane of the device being calibrated.
When the piston gauge is operating in the absolute mode, the Reference pressure,
R
P
,
is subtracted to obtain the differential pressure that the piston is required to generate.
J.
The value of
2
2
1
1
A
A
P
b
P
b
+
+
, which is used to determine the piston area at different
system pressures, is recorded in column 6. For some pistons,
1
b
and/or
2
b
are equal to
zero. Always observe the sign in front of b
1
and b
2
as found in the calibration report.
K.
Column 7 is used to record
)
(
t
e
A
which is the area of the piston at pressure
A
P
and at
the expected temperature
( )
t
.
L.
Column 8, the weight load, is the force required on a piston of given area to produce
a given pressure.
⎟
⎠
⎞
⎜
⎝
⎛
=
t
e
A
A
P
F
where:
F
=
Weight load or force on the piston
A
P
=
Pressure as indicated in Column 5
⎟
⎠
⎞
⎜
⎝
⎛
t
e
A
=
Effective piston area at the expected temperature
( )
t
.
M.
Column 9 is the apparent mass that is required to produce the force listed in
Column 8.
Summary of Contents for RUSKA 2465A-754
Page 5: ...iii List of Tables Table Title Page 2 1 Symbols 2 2 ...
Page 6: ...RUSKA 2465A 754 Users Manual iv ...
Page 8: ...RUSKA 2465A 754 Users Manual vi ...
Page 12: ...RUSKA 2465A 754 Users Manual 1 4 ...
Page 26: ...RUSKA 2456A 754 Users Manual 3 4 ...
Page 54: ...RUSKA 2465A 754 Users Manual 6 14 ...
Page 64: ...RUSKA 2465A 754 Users Manual A 10 ...
Page 66: ...RUSKA 2465A 754 Users Manual A 12 ...
Page 68: ...RUSKA 2465A 754 Users Manual B 2 glg32 bmp Figure B 1 P C ASSY LR CAL D ...
Page 70: ...RUSKA 2465A 754 Users Manual B 4 glg34 bmp Figure B 3 P C ASSY W O CLEANING KIT ...
Page 72: ...RUSKA 2465A 754 Users Manual B 6 glg36 bmp Figure B 5 PC ASSY MHR W O CLEANING KIT ...
Page 74: ...RUSKA 2465A 754 Users Manual B 8 glg38 bmp Figure B 7 P C ASSY HR CAL D W O CLEANING KIT ...
Page 80: ...RUSKA 2465A 754 Users Manual B 14 glg43 bmp Figure B 12 2465A 23 ...