deadweight tester (DWT) is a calibration standard which uses a piston cylinder on
which a load is placed to make an equilibrium with an applied
pressure underneath the piston. Deadweight testers are so called primarystandards which means that the pressure measured by a deadweight
tester is defined through other quantities; length, mass and time. Typically deadweight testers are used in calibration laboratories
to calibrate pressure transfer standards like electronic pressure
measuring devices.
Model | | Measuring Range | XY 0.6 | | 0.04-0.6Mpa | XY 6 | | 0.1-6Mpa | XY25 | | 0.5-25Mpa | XY 60 | | 1-60Mpa | XY 100 | | 1-100Mpa or 2-100Mpa |
Accuracy: 0.05% ; 0.02% ; 0.015% ; 0.01%
Characteristic: ● Wide range. ● When the lower pressure is 1Mpa, the basic errors of XY6,XY60,and
XY100 type dead weight tester are 0.05%.Therefore a XY100 type dead
weight tester can substitute for three domestic dead weight tester
with respective upper pressure 6Mpa, 60Mpa and 100Mpa. ● Piston and piston cylinder are made from WC hard metal alloy with
high strength, high hardness and low linear expansion coefficient
of temperature. Hence through calculating, the distortion error of
piston system under pressing can be ignored. Even though the
ambient temperature is widen to 20±5℃, the properties of piston
gauge is still stabile. ● Because a precision furbishing process is used for the working
piston and piston cylinder, the cylindricity and the gap between
piston and piston cylinder are very small. Therefore giving up
using castor oil with viscosity 900-11—mm2/s as pressure medium,
instead using Di-(2-ethylhexyl)sebacate, which has excessively low
viscosity 20-25mm2/s and is appointed as the medium in the
international pressure comparison, ensure that piston gauge have
the most sensitivity. ● The working position of piston is monitored by displacement
sensor, which makes piston gauge more sensitive and accurate. ● Low gravity center of loads , piston rotating steadily and
pressure fluctuating obscurely too much. ● Novel seal structure and excellent properties. ● Pump, pressure regulator , valve and pipe can be used
conveniently because of reliability, portability and perfection. XIYI Group Co., Ltd ( Xi'an Instrument Factory)
Precision pressure gauge, stainless steel pressure gauge, pressure
pump, seismic pressure gauge, piston manometer, floating ball type
pressure gauge, hand pressure pump,
Electric contact pressure gauges, diaphragm pressure gauges,
digital pressure gauge, vacuum gauge, vacuum pressure pump, |
