Scanivalve MPS4232, Руководство по аппаратному и программному обеспечению

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MPS4264
Section 4: Hardware
SECTION 4: HARDWARE
Pneumatic Connections
The MPS modules has several different pneumatic connec -
tions. All pneumatic inputs are located on the top of
the module. There are two basic groups of pneumatic
connections types on the module: pressure measurement
connection and support connections. All pneumatic inputs
are through one removable header for easy plumbing
and system re-configuration. The measurement ports
are located on the on the outer edge of the modules and
are identified as 1-32 on one pneumatic header. These
32 input ports are directly connected to one of the indi-
vidual pressure transducers within the module. On the
same pneumatic header as the measurement input ports
is the common reference port (REF). The REF port is used
for connecting the reference manifold to a known, stable
ambient pressure.
The 32 measurement input ports (or Px ports) are available
with 0.042” or 0.031” OD tubes. The tube REF input will
always be 0.063” OD.
Figure 4-1: Pneumatic inputs
Basics of Connecting Input Tubes
All pneumatic connections are 0.063”, 0.042” or 0.031”
OD stainless steel bulged tubulations. These tubes are
designed to have a tight-fitting plastic tube slid over the OD
of the tube. For all low pressure connections (50psi and
less) the plastic tubing can simply be slid over the tubula -
tion and the connection is complete. When using Urethane
or Vinyl tubing for high pressure applications, a helical
spring clamp over the OD of the plastic tubing is recom -
mended. The clamp is slid over the tubing and located
around the apex of the bulged of the tubulation. This helps
hold the plastic tubing in place and prevent leaks.
Installing the plastic tubing over the stainless steel tubing
can be done much easier by using Scanivalve’s special
“Tubing push-on tool” P/N: TPOTL-XXX. This tool is offered
in a variety of sizes to work for tubing from 0.031” to
0.125” OD.
Figure 4-2: Tubulation connection with helical
spring clamp
Pressure Measurement (Px) Ports
Each MPS4232 scanner module has 32 pressure measure -
ment ports, or “Px” ports. They are labeled as 1-32.
Each of these ports are connected to a discrete pressure
transducer. If any Px ports are not being used, it is recom -
mended that they be covering to prevent dust or any debris
from clogging the port.
Reference (REF) Port
The ‘REF’ port ties into a manifold that connects the back
side (or negative side) or all transducers together. During
most applications, the ‘REF’ port of low pressure modules
(below 15 psi) should be routed to a known, stable static
location. Typically this “reference” location will be a wind
tunnel static port, a static barrel or in flight test applications
the aircraft static system. This ensures that when a zero
offset calibration (CALZ) is performed no unwanted offsets
are introduced. During a calibration, positive pressures will
be applied through the ‘REF’ port to perform the negative
portion of the calibration.
For applications where an elevated reference pressure will
be used, the maximum pressure applied to the REF input is
100psi, or sensor overpressure, whichever is less.
Removable Pressure Input Headers
All pneumatic inputs to the MPS are through a single
removable input headers. The header is held in place with
three #1-72 screws. A 1/16” Allen/hex wrench fits the
screws.