ACR Electronics ELT-202 User Manual
PRODUCT
ELT-202™
SUPPORT
MANUAL
Y1-03-0090-2
Rev. D
Product No. 2761
Emergency Locator Transmitter
ACR Electronics, Inc.
5757 Ravenswood Road
Fort Lauderdale, Fl 33312
+1(954) 981-3333 · Fax +1 (954) 983-5087
www.acrelectronics.com
Email: Info@acrelectronics.com
A
Chelton Group
company
ACR / ELT-202
OPERATING AND MAINTENANCE MANUAL
Record of Revisions (To be completed by customer, optional)
(Note: It is ACR's documentation policy to update the entire manual revision when a
change is incorporated)
Revision Letter Issue Date Date Inserted By Signature
A
B
C
D
SERVICE BULLETIN / INFORMATION LETTER LIST
Service Bulletin /
Incorporation Date By Signature
Info Letter No.
Y1-03-0090-2 Rev. D
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Table of Contents
Section Page
1.0 INTRODUCTION 3
1.1 Scope 3
1.2 Purpose 3
2.0 TECHNICAL SPECIFICATIONS 4
3.0 INSTALLATION 5
3.1 Raft Pack Installation 5
3.2 Mounting Bracket Installation 5
4.0 OPERATION 5
4.1 Deployment at sea 5
4.2 Deployment on land 5
5.0 TESTING 6
5.1 General 6
5.2 Operational Test - Self Test 6
5.2 Operational Test - Shop 7
6.0 MAINTENANCE 11
6.1 Cleaning 11
6.2 Visual Inspection 11
6.3 Factory Inspection and Test 11
6.4 Battery Replacement 11
7.0 REPAIR 12
8.0 ASSEMBLY AND STORAGE 12
8.1 Assembly 12
8.2 Storage 12
9.0 REPLACEMENT PARTS 12
Figure 1 Test Setup 9
Figure 2 Modulation Check 9
Figure 3 ACR Test Fixture #T2-01-0016 10
Figure 4 ACR / ELT-202 14
Figure 5 Storage Position for ELT-202 15
Figure 6 Test Point Polarities 16
Y1-03-0090-2 Rev. D
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1.0 INTRODUCTION
1.1 Scope
This manual provides information for the installation, operation, and maintenance
of the ACR/ELT-202 Emergency Locator Transmitter (ELT) hereafter referred to
as the ELT. The ELT-202 is approved for use as a survival (S) type ELT under
FAA Technical Standard Order (TSO) C-91a and FCC Rules Part 87.
1.2 Purpose
The ELT (S) is intended to be carried aboard aircraft and used to locate survivors
in the event of a ditching. It can be used, however, in over-land emergencies.
When activated, it transmits a distinctive sound on the international distress
frequencies of 121.5 and 243 MHz. These signals can be used by Search and
Rescue personnel to assist them in locating survivors.
Unlike other types of ELT's, the ELT (S) is intended to be removed from the
aircraft and to travel with survivors. The ELT-202 may be installed within life
rafts or slide/rafts or mounted in the aircraft cabin on flightdeck.
The ELT-202 is activated by placing the unit in water. The unit is completely
waterproof and floats upright when deployed. A tether is provided for securing the
unit to a life raft or person.
Y1-03-0090-2 Rev. D
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2.0 TECHNICAL SPECIFICATIONS
Frequencies 121.5 and 243 MHz
Frequency Stability ± .005% (crystal controlled)
Emissions Type A3X
Modulation Downward swept tone between 1400 Hz and
400 Hz at 3 Hz rate
Peak Effective Radiated Power Minimum 50 mW (17 dBm)
(PERP)
Transmitter RF output
Operating Temperature 0°C to +55°C
Storage Temperature
Activation Water activated when deployed in water
Size Length 23" exclusive of 19" flex antenna
Diameter 2 ¾"
Weight 4.01 lbs. max
Environmental Categories Per FAA TSO-C91a for Survival ELTs
Accessories (optional) Bulkhead Mounting Bracket
ACR P/N A3-06-1698
Battery Type Magnesium / Silver Chloride, 9V
Water-activated Electrolyte
Battery Operational Life 48 hours minimum. 100 hours typical
Battery Service Life 5 years. Recertified by factory inspection
and tests.
Battery Storage Life Indefinite - requires factory recertification
every 5 years
Y1-03-0090-2 Rev. D
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