Rev:
1.00
Date:
08.01.2013
Page:
12 of 31
FTK100 FIELD TEST KIT
OPERATING MANUAL
Document-P/N:
FTK100-OM
© Aventech Research Inc. 2013. All Rights Reserved.
2.4 Connecting the Calibration Fixture to the FTK100
This section describes how to connect the calibration fixture to the FTK100 control
module.
The FTK100 supports calibration fixtures designed to test pressures on standard
pitot-static probes and five-hole probes. A calibration fixture designed to test the
five-hole probe integrated into the ARIM320 is shown in Figure 4. For testing the
more common pitot-static probes, tubing is only required to be connected between
the pitot tubing connector on the forward face of the calibration fixture, and the static
tubing connector furthest aft on the side of the calibration fixture. If a five-hole probe
is being tested, as shown in Figure 4, tubing must also be connected to the angle-
of-attack (alpha) connectors in the vertical plane and sideslip connectors in the
horizontal plane. Please note that the calibration five-hole probe calibration fixtures
are typically designed so that the static connector is on the same side as the Alpha+
connector. This allows the user to orient the calibration fixture correctly when
installing it on the probe.
Both the FTK100 control module and Aventech Research Inc. calibration fixtures
utilize 1/8” OD quick connect / disconnect fittings to interface to the interconnecting
pressure tubing. To install the tubing simply insert it as far as possible into the fitting
and it will lock in place. To disconnect, push down on the orange collar on the fitting
and pull the tubing out.
Six lengths of 1/8” OD tubing will have been provided with your field test kit which
should be installed between the pressure connections show on the calibration
fixture in Figure 4 and the labeled input ports on the FTK100 shown in Figure 2.
2.5 Installing the Calibration Fixture
For pitot-static probes, orientation of the calibration fixture is not important however,
for five-hole probes it is critical. As described in Section 2.5, the static pressure
fitting is typically located on the same side as the alpha+ pressure fitting.
Install the calibration fitting onto the measurement boom by sliding it over the boom
while insuring the static pressure fitting is pointing straight up. This will insure that
the remaining pressure fittings are oriented correctly relative to the pressure ports
on the measurement boom. Slide the fixture as far as it will go onto the boom and
then apply a small amount of longitudinal force to the fixture to compress the O-
rings against the nose of the boom and seal off the pressure ports to the calibration
fixture. While applying this force, rotate the collar located at the rear of the
calibration fixture clockwise, when looking at the front of the fixture, gently to lock
the fixture onto the probe boom.
