Operating Instructions - CPA2501
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Air Data Test Indicator
CPA2501
5.3 Mounting
The instrument can be set up on a desk top or it can be rack-mounted. Rack mount hardware is optional
on the CPA2501 (see Section 5.2 Dimensions and Section 8, Options).
The special sensors used in the CPA2501 are relatively insensitive to tilt and vibration. However to further
assure stability and accuracy, avoid mounting the instrument on surfaces subject to excessive motor or
machinery vibration.
5.4 Rear Panel
A single dual transducer is installed in the CPA2501 chassis consisting of a Ps/Qc or a Ps/Pt transducer
set. The CPA2501 is also available in a single channel configuration with a Ps (altitude) or Qc (airspeed)
channel only. In the upper right corner is a hose barb fitting which is connected to the baro ref if installed.
Positioned on the left side is a remote transducer connection, the RS-232, Ethernet, IEEE-488, USB de-
vice connections for communication, the USB host connection and the 12 VDC power input.
Figure 5.4 - Rear Panel
5.4.1 Pressure Connections
i
Notice
When making up a connection to an o-ring adapter fitting port use a back-up
wrench to prevent over-stressing the threads in the manifold block.
The pressure ports on the rear of the CPA2501 are female 7/16 - 20 SAE/MS straight threads per
MS16142 and SAE J514 table 14. Connected adaptors require a tube fitting boss seal with an o-ring per
MS33656. Mensor can provide a variety of adapter fittings (see Section 8, Options) with the instrument.
Do not use sealant on fittings sealed with an o-ring. The integrity of each seal is particularly important
since even microscopic leaks can cause errors in measurements.
5.4.2 Pressure Port
The CPA2501 will precisely measure the altitude or airspeed corresponding to the pressure connected to
the pressure port up to the full scale range of the transducer installed.
