Peregrine Systems TXA201 User manual

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E-TX-21-0014 Rev IR
Installation Manual, TXA201 Triaxial Accelerometer
i
7385 S. Peoria St. Unit C4 ~ Englewood, CO 80112 ~ [phone]
www.peregrine.aero
E-TX-21-0014 Rev IR
Installation Manual
TXA201 Triaxial Accelerometer
Texas Aerospace P/N TA20001-00
Peregrine P/N PA-210618-801
REVISION STATUS
Rev.
Description
Approved
Date
IR Initial Release T. Bailey 7/7/22
Export Control Notice
The technical data contained herein is controlled under the U.S. Export Administration
Regulations (EAR), Category ECCN 7A994. Control and export of this technical data
must comply with the EAR and U.S Department of Commerce requirements.
Proprietary Notice
The information contained herein is proprietary to Peregrine. This information shall not be
used, released, or discussed in whole or in part without written permission from
Peregrine.

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E-TX-21-0014 Rev IR
Installation Manual, TXA201 Triaxial Accelerometer
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TABLE OF CONTENTS
1GENERAL............................................................................................................................................. 4
1.1 Purpose ....................................................................................................................................... 4
1.2 CAUTION..................................................................................................................................... 5
1.3 IDENTIFICATION ........................................................................................................................ 5
2EQUIPMENT DETAILS ........................................................................................................................ 5
2.1 Mechanical................................................................................................................................... 5
2.2 Electrical ...................................................................................................................................... 7
3EQUIPMENT QUALIFICATION............................................................................................................ 8
3.1 TSO.............................................................................................................................................. 8
3.2 Application ................................................................................................................................... 8
3.3 Environmental.............................................................................................................................. 8
3.4 Installation Approval .................................................................................................................... 9
4TESTING .............................................................................................................................................. 9
4.1 Fault Indication ............................................................................................................................ 9
4.2 Pre-Installation Check.................................................................................................................. 9
4.3 Functional Test Procedure .......................................................................................................... 9
4.4 Post-Installation Check ................................................................................................................ 9
5MAINTENANCE ................................................................................................................................. 11
5.1 Maintenance and Calibration..................................................................................................... 11
5.2 Cleaning..................................................................................................................................... 11
5.3 Repair ........................................................................................................................................ 11
6CONTACT .......................................................................................................................................... 11
LIST OF TABLES
Table 1: Environmental Qualifications .......................................................................................................... 8
Table 2: Test Orientations and Outputs ...................................................................................................... 10
LIST OF FIGURES
Figure 1: TXA201 Triaxial Accelerometer ..................................................................................................... 4
Figure 2: TXA201 Dimensions ...................................................................................................................... 6

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Installation Manual, TXA201 Triaxial Accelerometer
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Acronyms and Abbreviations
Acronym/Abbreviation
Definition
AC
Advisory Circular
AML
Approved Model List
ARINC
Aeronautical Radio, Incorporated
ATP
Acceptance Test Plan
ATR
Acceptance Test Report
CG
Center of Gravity
DC
Direct Current
DO
Document Order
EQ
Equipment Qualification
ESD
Electro-Static Discharge
FAA
Federal Aviation Administration
FDR
Flight Data Recorder
FSO
Full Scale Offset
MDL
Master Document List
MEMS
Micro-Electromechanical System
MPS
Minimum Performance Standards
mV
Millivolts
N/A
Not Applicable
PCB
Printed Circuit Board
RF
Radiated Fields
RTCA
Radio Technical Commission for Aeronautics
STC
Supplemental Type Certificate
TSO
Technical Standard Order
TSOA
Technical Standard Order Authorization

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E-TX-21-0014 Rev IR
Installation Manual, TXA201 Triaxial Accelerometer
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1 GENERAL
1.1 Purpose
This manual provides Installation Instructions for the TXA201 Triaxial Accelerometer,
including information on mounting, testing, and physical and electrical interfaces.
The TXA201 measures accelerations along the longitudinal, lateral and vertical axes of
the aircraft. It does not measure angular acceleration rates.
The unit is designed to meet ARINC 542A mounting specifications and is sealed to
prevent moisture incursion.
This accelerometer may be utilized as an input to flight data recorder (FDR) systems such
as the Curtiss Wright Fortress Recorder.
The accelerometer utilizes a micro-electromechanical system (MEMS) device that
converts gravitational and inertial forces into an analog direct-current (DC) voltage output
for each of the three axes (vertical, longitudinal, and lateral). The equipment includes a
voltage regulator to provide a controlled input to the device and circuitry to scale the
output of the device to match the range expected by the FDR.
Figure 1: TXA201 Triaxial Accelerometer

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E-TX-21-0014 Rev IR
Installation Manual, TXA201 Triaxial Accelerometer
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1.2 CAUTION
The TXA201 Triaxial Accelerometer can be damaged by static electricity. Observe ESD
(electrostatic discharge) procedures when handling the unit.
Verify that power and ground leads are terminated correctly in the mating connector
before applying power to the unit. Damage to the internal components may occur if power
is applied incorrectly.
Cap the electrical connector when the accelerometer is disconnected or not installed.
Failure to follow these precautions may void the equipment warranty.
1.3 IDENTIFICATION
Texas Aerospace Part Number: TA20001-00
Peregrine Part Number: PA-210618-801
Placard
An identifying placard is affixed to the accelerometer prior to delivery. The placard
includes a serial number of the format ”0000” with the serial number of the first unit
being 1001.
The placard also serves as an anti-tamper device. The placard is installed over one of
the assembly screws. Removing or damaging the placard to access the screw will void
the equipment warranty.
2 EQUIPMENT DETAILS
2.1 Mechanical
Mounting
The TXA201 is designed to meet ARINC 542A mounting specifications and attaches with
four (4) #10 Pan Head Steel Fasteners. This equipment may be installed in a
compartment that is non-pressurized and not temperature-controlled.
Alignment
The unit should be mounted with base of the accelerometer facing down on flat and level
(within 4 degrees), rigid aircraft structure. Shock mounts or vibration dampeners should
not be used when mounting this unit. Ensure the alignment notch (R.20 in Figure 3 below)
is facing forward. Verify alignment using the arrows on the identification placard.

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Location
The accelerometer should be mounted within 12 feet longitudinally and 6 feet laterally of
the aircraft center of gravity to avoid erroneous readings due to aircraft rotational
maneuvers.
Weight: 10 Oz.
Center of Gravity: See Figure 3 below
Dimensions
Figure 2: TXA201 Dimensions

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Installation Manual, TXA201 Triaxial Accelerometer
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2.2 Electrical
Electrical Pin Configuration
A +EXCITATION (Power) B -EXCITATION (Ground)
C +VERTICAL UP D -VERTICAL DOWN
E +LATERAL RIGHT F -LATERAL LEFT
G +LONGITUDINAL FORWARD H -LONGITUDINAL AFT
J +CASE GROUND K -SPARE
Electrical Signals
Range:
UP +6g 5000mV
DOWN -3g 200mV
FWD +1g 5000mV
AFT -1g 200mV
RIGHT +1g 5000mV
LEFT -1g 200mV
Axial Null:
VERTICAL 1800 mV
LONGITUDINAL 2600 mV
LATERAL 2600 mV
Excitation: 18 TO 32 VDC (28 VDC nominal)
Supply Current: <30 mA 32 VDC Excitation
Output: 5.0 VDC max
Accuracy: 0.05g (X and Y axis), 0.45g (Z axis)
Resolution: 0.004g, all axes
Bonding: Electrical bonding of the accelerometer housing to aircraft structure is
not required.
Connectors
Accelerometer Connector: MS3113E12-10P
Mating Connector: MS3116E12-10S
Hardware and Sofware
The accelerometer includes no software or complex hardware.

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Installation Manual, TXA201 Triaxial Accelerometer
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3 EQUIPMENT QUALIFICATION
3.1 TSO
The TXA201 triaxial accelerometer meets TSO-C124c requirements and is intended to
provide data to a flight data recorder (FDR) at a rate and accuracy that is compatible
with the FDR.
3.2 Application
The TXA201 is designed to provide accelerometer inputs for digital flight data recording
equipment.
3.3 Environmental
The accelerometer is environmentally qualified for aircraft applications per RTCA DO-
160G testing as shown in Table 3. The environmental qualification categories shown
support typical installations in Part 25 aircraft models.
Table 1: Environmental Qualifications
DO-160G Testing Summary
Conditions
Section
Description of Tests Conducted
Temperature and Altitude
Low Temperature
High Temperature
In-Flight Loss of Cooling
Altitude
Decompression
Overpressure
4.0
4.5.1
4.5.2 & 4.5.3
4.5.4
4.6.1
4.6.2
4.6.3
Equipment tested to Category F2
Temperature Variation
5.0
Equipment tested to Category B.
Humidity
6.0
Equipment tested to Category B.
Operational Shock and Crash Safety
7.0
Equipment tested to Category B.
Vibration
8.0
Equipment tested to Category S and H,
aircraft zone 1 for fixed wing aircraft fuselage
using vibration test curves C3 and R.
Explosive Atmosphere
9.0
Equipment identified as Category X ( no test)
Waterproofness
10.0
Equipment tested to Category W.
Fluids Susceptibility
11.0
Equipment identified as Category X ( no test)
Sand and Dust
12.0
Equipment identified as Category X ( no test)
Fungus
13.0
Equipment identified as Category X ( no test)
Salt Fog Test
14.0
Equipment identified as Category X ( no test)
Magnetic Effect
15.0
Equipment is Category Z.
Power Input
16.0
Equipment tested to Category A.
Voltage Spike
17.0
Equipment tested to Category B.
Audio Frequency Susceptibility
18.0
Equipment tested to Category B.
Induced Signal Susceptibility
19.0
Equipment tested to Category ZC.
Radio Frequency Susceptibility
20.0
Equipment tested for conducted
susceptibility to Category T and for radiated
susceptibility to Category T.
Radio Frequency Emission
21.0
Equipment tested to Category L.
Lightning Induced Transient Susceptibility
22.0
Equipment identified as Category X ( no test)
Lightning Direct Effects
23.0
Equipment identified as Category X ( no test)
Icing
24.0
Equipment identified as Category X ( no test)
Electrostatic Discharge
25.0
Equipment tested to Category A.
Fire, Flammability
26.0
Equipment identified as Category X ( no test)

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Installation Manual, TXA201 Triaxial Accelerometer
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3.4 Installation Approval
The TXA201 Triaxial Accelerometer requires FAA approval for installation on an N-
registered, type-certificated aircraft. Installation is not authorized by this manual.
4 TESTING
4.1 Fault Indication
This accelerometer does not include any fault indication features.
4.2 Pre-Installation Check
Each accelerometer completes an acceptance test prior to delivery. Unless damage
during shipment or storage is suspected, a pre-installation test should not be
required.
4.3 Functional Test Procedure
If damage or troubleshooting suggests that the performance of the acceleromter
may be suspect, a function test may be performed using the following procedure:
Requirements
•28VDC Power Supply
•DC Voltmeter
•Tooling, fixtures, or other items that will allow the accelerometer to be rested
on each of its six faces in a flat and level orientation.
•A test harness may be constructed to interface with the pinouts listed in
Section 2.2.1
Connect the accelerometer to power and ground and connect to the output pins as
shown in Section 2.2.1
Place the accelerometer flat and level on each of its six sides as shown in Table 2
below.
Record the voltage output on the pins indicated in Table 4 and ensure they are
within the listed range.
Repeat the test for the remaining positions of the accelerometer.
If any recorded voltages are out of range, please see the contact information listed
in Section 6.
4.4 Post-Installation Check
After installation, the accelerometer data provided to the receiving FDR or other
equipment should be verified using a compatible data download and analysis tool

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Installation Manual, TXA201 Triaxial Accelerometer
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such as the DART data analysis device from KGB Aviation or other services. Verify
that the accelerometer data is properly received and is within expected parameters.
Table 2: Test Orientations and Outputs
Axis
Orientation
(Position Arrow # “UP”)
Gravity
Output and Range
Vertical
3
0g
Pin C: 1.800 +/-.0036 VDC
1
+1g
Pin C: 2.333 +/-.0036 VDC
2
-1g
Pin C: 1.267 +/-.0036 VDC
Lateral
1
0g
Pin E: 2.600 +/-.0036 VDC
4
+1g
Pin E: 5.000 +/-.0036 VDC
6
-1g
Pin E: 0.200 +/-.0036 VDC
Longitudinal
1
0g
Pin G: 2.600 +/-.0036 VDC
3
+1g
Pin G: 5.000 +/-.0036 VDC
5
-1g
Pin G: 0.200 +/-.0036 VDC
1
3
4
5
6
2

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E-TX-21-0014 Rev IR
Installation Manual, TXA201 Triaxial Accelerometer
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5 MAINTENANCE
5.1 Maintenance and Calibration
The TXA201 Triaxial Accelerometer does not require maintenance or calibration.
5.2 Cleaning
The unit may be cleaned with Isopropyl Alcohol and a cotton cloth or swabs. A soft
bristled brush may also be used.
5.3 Repair
The TXA201 Accelerometer contains no user-serviceable parts and is not designed to be
adjusted or repaired by field personnel. Return units that fail the Functional Test
Procedure per the contact information shown in Section 6 for evaluation.
6 CONTACT
If you have questions, please contact:
Texas Aerospace Technologies
3550 Maple Street
Abilene, TX 79602-7130
325-788-2418
www.txaero.com
For RMA requests, please email: [e-mail]