Page 29 - Energize July 2022

NEWS

Hydraulic deadweight tester for

calibrating pressure measuring

instruments

eadweight testers are accepted there is a balance of forces between pressure and wheel weights. Due to the
as the most accurate method for excellent quality of the system this pressure remains stable over several minutes, so
Dthe calibration of electronic or that, for instance, adjustments of the device under test can be carried out without
mechanical pressure measuring devices. any problems.
Instrotech is offering the LR-Cal LDW series For users who require a digital pressure display for connection to the
of deadweight testers, which are available deadweight tester, Instrotech can supply the Keller Leo2 that offers accuracies of
in the ranges from 10 bar to 1400 bar. 0,1%. An intrinsically safe version is available.
The direct measurement of pressure
(according to its definition as a quotient Contact Instrotech, Phone 010 595-1831, sales@instrotech.co.za
of force and area) ensures high accuracies Facebook: bit.ly/3rj1SWY
and long-term stability. These testers are LinkedIn: bit.ly/3rkfKjL
used extensively in calibration laboratories YouTube: bit.ly/3irItiy
in industry, standards institutes and Product: https://bit.ly/3zNwYKH
research facilities. Hastags: #pressurecalibration #calibration #Instrotech
The LDW series are ideally suited
to on-site use as well as for service and
maintenance purposes. The customized
assembly allows set up of a complete,
compact system consisting of a universal
basement and the measuring systems
(piston/cylinder units). The high-quality
piston/cylinder units are manufactured
from tungsten carbide which is known
for its small temperature co-efficiency.
Fast and uncomplicated changes of the
measuring range are possible using a flat
spanner.
In order to generate the individual
test points, the piston/cylinder system
is weighted with mass loads which are
also calibrated and specially adapted to
the required application. The basement
is fitted with the corresponding system,
depending on the measuring range of
the device under test. The pressure is set
via an integrated pump or, if an external
pressure supply is available, via control
valves (pneumatic models).
For fine adjustment, an adjustable
volume with precision spindle is available.
The weight applied is proportional to the
desired pressure and provided by using
optimally graduated weights. As soon as
the measuring system reaches equilibrium,

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