VII-R-D ETRI, VII-R-D Datasheet - Page 2

• Manufacturer Part Number: VII-R-D
• Description: Vii - R & D And Test Equipment
• Manufacturer: ETRI

The corresponding flow is calculated from the
pressure differential P2-P3 and is the free air-
flow. By progressively closing shutter (b) at each
position a flow and static pressure can be
obtained, up to the point of complete closure
which corresponds to the shut off pressure.
The values of flow and pressure thus obtained
(corrected if the density differs from 1.2 kg/m
at the time of the test) can be plotted as fan
aerodynamic performance curve, such as
those given in the technical leaflets. Experience
has shown us moreover that tests made with
our chamber give results very close to those
obtained with the chamber described in
MIL-B-23071 Standard which is based on the
test equipment of AMCA, Standard Test Code,
bulletin 210. These test rigs that of CCT 18-10
are based on the principle sometimes called
"by chamber" and always give lower results
that those based on the principle of "venturi",
where part of the dynamic pressure developed
by the impeller is recovered as static pressures,
that tends to give static pressures higher than
the true value.
Our laboratory includes extensive equipment
(eg.: laser recorders) to measure mechanical
dimensions with extreme accuracy (up to 1/10 µm).
Our equipments allow us to design and test elec-
tric and electronic parts:
• Reliability: several cabinets for environmental
• Shocks and vibrations: extensive testing can
MECHANICAL METROLOGY
INSTRUMENTATION
Technical guide
conditions tests (temperature, humidity, salt
spray), and accelerated ageing tests.
be completed with a vibration pot.
3
We are equipped to perform noise level tests
in our own sound proof chamber. The fan under
test is supported on elastic mounts in the center
of the test chamber. A microphone is placed
1 meter from the center line of the fan and is
connected to instrumentation that includes a
measuring amplifier, a condenser microphone,
a pass-band filter, and a recorder.
6 sides sound proof chamber
All our R & D files are stored on computerized
technical data base including data-sheets
libraries.
All our designs are done with computer assis-
ted programs such as AUTOCAD, ORCAD and
I-DEAS which are compatible with our pro-
duction computer system.
ACOUSTIC TEST
RESEARCH AND DEVELOPMENT