Item Brochure

2 Fluke Calibration P3000 Series Hydraulic Deadweight Testers Models P3100 and P3200
Operating principle
Deadweight testers are the primary standard for
pressure measurement. Utilizing the well proven
piston-gauge system consisting of a vertically
mounted, precision lapped piston and cylinder
assembly, accurately calibrated weight masses
(Force) are loaded on the piston (Area), which
rises freely within its cylinder. These weights
balance the upward force created by the pres-
sure within the system.
The pressure is measured when placed on
a correctly spinning and floating piston. The
total pressure measured is the summation of the
weights plus the piston weight carrier assembly.
Instrument base
There are three basic variations in the hydrau-
lic offering; single low pressure, single high
pressure and dual piston models. Pressure is
generated and controlled by means of a high
quality screw press located on the front of
the tester. A built-in hand pump is included
as standard for all hydraulic models to prime
the system and accommodate large volume
requirements.
Piston/cylinder assemblies
The piston/cylinder assembly is the heart of
each deadweight tester. They are manufactured
from materials that provide stability, durability,
and low thermal coefficients and distortion. Our
experience and knowledge of piston/cylinder
production and calibration ensure the precision
and performance required for today’s demand-
ing calibration requirements.
Weight masses
Standard weight masses are series 3 non-
magnetic austenitic stainless steel. Each mass
is marked with the serial number of the instru-
ment and the nominal pressure value relative to
the high or low-pressure piston, when appli-
cable. Optional fractional weights are stainless
steel and/or solution heat treated aluminum.
Gravity correction
Gravity varies significantly with geographical
location and this variation has a direct effect
on the force of the weights and the accuracy
of the deadweight tester. Each instrument can
be trimmed to local gravity at no extra cost. If
unspecified, instruments will be calibrated to
Standard Gravity at 980.665 cm/s
2
.
Force
Force
Area
Area
Pressure
Pressure =
Dual piston design Priming pump
Hand tighten adapters
Floatation indicator
Acrylic reservoir
Fine control screw press
Leveling feet
Spirit level