User guide
Table Of Contents
- Record of Revisions
- Service Bulletin List
- List of Effective Pages
- Table of Contents
- List of Figures
- Introduction
- Description and Operation
- Test and Fault Isolation
- 1. Inspection and Test Regulatory Requirements
- 2. Inspection and Test Procedures
- A. Checklist
- B. Preparation
- C. Coax Cable and Wiring Connections Inspection – Item 1
- D. Mounting Tray and Hardware Inspection – Item 2
- E. Battery Pack Inspection – Item 3
- F. G-Switch Functional Check – Item 4
- G. Performance Testing Setup
- H. 121.5 MHz Frequency Measurement – Item 5a
- I. Audio Modulation Check – Item 5b
- J. 121.5 MHz Power Output Measurement – Item 5c
- K. 406 MHz Frequency Measurement – Item 5d
- L. 406 MHz Power Output Measurement – Item 5e
- M. Current Draw Test – Item 5f
- N. Digital Message Verification – Item 5g
- O. ELT Reset Check – Item 5h
- P. Installed Transmitter Test – Item 6
- Q. Antenna Test – Item 7
- R. Inspection and Test Documentation – Item 8
- 3. Fault Isolation
- Removal
- Installation
- 1. Regulatory Requirements and Guidelines
- 2. Mounting Tray
- 3. Antenna
- 4. Remote Switch
- 5. Buzzer
- 6. Wiring
- A. General Considerations and Recommendations
- B. Remote Switch Harness Fabrication
- C. ELT D-Sub Plug Installation
- D. Cockpit Remote Switch 9-Pin Plug Installation
- E. Wiring Installation
- F. Antenna Connection
- G. Cockpit Remote Switch Power Connection
- H. Remote Switch Alternate Power Source
- I. Airframe Ground Connections
- J. Buzzer Connections
- K. Remote Switch Final Installation
- 7. ELT Installation
- 8. Battery Pack Installation
- 9. Helicopter Installations - Special Considerations
- Appendix A – ELT Registration
- Illustrated Parts List
25-62-30
Page 39 of 84
Jun 25/13
ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ME406 (453-6603), ME406HM (453-6604)
(5) Set the ammeter range to accommodate at least 5 A.
(6) Activate the ELT by placing the control switch in the “ON” position.
(7) Allow the ELT to transmit a 406 MHz burst, which occurs about 50 seconds after activation.
(a) Read the 406 burst current draw. The 406MHz burst will draw approximately 3A to 4A.
Burst current should not exceed 5A.
(8) Adjust the ammeter to a scale appropriate for reading less than 200 mA.
(9) Read the steady state current draw on the ammeter, which must be £ 95 mA.
(10) Disconnect the ammeter before the next 406 MHz burst.
(11) Deactivate the ELT by placing the control switch in the “ARM” position.
(12) Remove the test fixture and reinstall the battery pack in accordance with SUBTASK 25-62-30-
450-001 on page 71.
SUBTASK 25-62-30-750-009
N. Digital Message Verification – Item 5g
(1) Set the 453-1000 ELT Test Set (ETS) beacon reader to receive and decode the ELT digital
message. Refer to the ETS operating manual (570-1000) for ETS operating instructions and
additional details.
NOTE
: A beacon reader equivalent to the ETS may be used, provided it is capable of
receiving and decoding the 406 MHz digital message. Examples of equivalent beacon
readers include the IFR-4000, BT100A, and other models available. Consult
documentation for the beacon tester in question and contact Artex Technical Support
for further information.
NOTE
: The SARTECH 453-0131 ELT Tester is no longer supported and cannot properly read
the latest generation of 406MHz ELTs.
(2) Activate the ELT by placing the control switch in the “ON” position.
(3) Allow the ELT to transmit for approximately 5 seconds.
(4) Deactivate the ELT and read the test message broadcast at “turn-off”. Message examples are
shown in Figure 10 Short and Long 406 MHz Message Examples on page 40.
(a) The test message broadcast by the ELT at “turn-off” contains all the information in an
actual distress message, except there is a special digital prefix that informs COSPAS-
SARSAT satellites to ignore the message.
(b) The left hand example in Figure 10 Short and Long 406 MHz Message Examples on page
40 is an ELT programmed for “User Protocol ELT with Serial Number”, with a test Hex
ID. The right hand example is an ELT programmed for “Standard Location Protocol ELT
with Serial Number”.
(c) Actual messages will vary depending on the protocol and information programmed into
the ELT.