Operating & Storage Specification; Environmental Corrections; Gravity; Temperature - Fluke P3000 Series User Manual

When the gas pressure within the system balances the combined downward force of the
piston and weights, the piston and weights will float freely and the system is in
equilibrium.
The design of a Piston/Cylinder Unit (PCU) fitted to a deadweight tester allows for a very
small clearance gap between the piston and cylinder. This is required to allow the gas to
pass between the components, providing a lubricating film, and preventing
metal-to-metal contact.
Operating & Storage Specification
Temperature and relative humidity ranges for operation and storage of the deadweight
tester.

Environmental Corrections

The deadweight tester has been calibrated to the Gravity, Temperature, and Air Density
stated on the certificate.
Equations and factors are given on the certificate to adjust for any variations in these
environmental conditions.

Gravity

Gravity varies greatly with geographic location, and so will the deadweight tester reading.
Due to the significant change in gravity throughout the world (0.5%), ensure that the
tester has either been manufactured to your local gravity, or that you have applied the
correction from the calibrated gravity.
Example:
Deadweight Tester calibrated gravity
(980.665 cm/s² is the International Standard Gravity)
Gravity at site
Indicated Pressure
The ability to determine the local gravity value will depend on the data available in the
country that the instrument is to be used in. Some countries have geographic/geological
survey/mapping organizations that have the data readily available. If not, the countries'
National Standards Laboratory may be able to recommend a source of suitable
information.

Temperature

info@Fluke-Direct.com
Table 1-2. Operation and Storage Specifications
18 °C to 28 °C
Temperature
64 °F to 82 °F
Relative Humidity 20 % to 75 %
(Non-Condensing)
TRUE
TRUE
Fluke-Direct
Operation
981 . 235
=
PRESSURE
980 . 665
=
PRESSURE 250 . 1453
General Information
Environmental Corrections
Storage
10 °C to 50 °C
50 °F to 122 °F
0 % to 90 %
980.665 cm/s²
981.235 cm/s²
250 psi
x 250
psi
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