. If this error code persists there may be a problem with the antenna installation. This can be checked with a VSWR meter. Check the antenna for opens, shorts, resistive ground plane connection.
4 Flashes – Low power detected. Occurs if output power is below approximately 33 dBm (2 watts) for the 406 signal or 17 dBm (50 mW) for the 121.5 MHz output. Also may indicate that 406 signal is off frequency.
. Check coax and connections
. Check antenna installation
. Check that the frequencies are within acceptable limits
5 Flashes – Indicates that the ELT has not been programmed or is incorrectly programmed. Does not indicate erroneous or corrupted programmed data.
6 Flashes – Indicates that G-switch loop between pins 5 and 12 at the D-sub connector is not installed. ELT will not activate during a crash.
. Check that the harness D-sub jumper is installed by verifying less than 1 ohm of resistance between pins 5 and 12.
7 Flashes – Indicates that the ELT battery has too much accumulated operation time (> 1hr). Battery may still power ELT, however, it must be replaced to meet FAA specifications. May also indicate damage to the battery circuit.
4.4.10 Verification of Digital Message
This test is not mandatory per FAR 91.207(d); however, Artex strongly recommends that it be performed as part of annual maintenance.
This test is mandatory in Canada.
Verify the 406 MHz digital message using a test set capable of receiving and decoding the message. Artex suggests the ELT Test Set (ETS) P/N 453-1000. Contact your local Artex dealer for availability of the ETS or call Artex direct at 1-800-547-8901. Other beacon testers can be used for the digital message verification. Follow instructions provided with the test set.
Realize that the ARTEX 406 MHz ELT transmits a 406 MHz message upon reset, which is encoded such that it will be ignored by the SAR satellite system. This 15-digit number is used to register the ELT with the appropriate 406 MHz ELT registration authority. In the US, the National Oceanic and Atmospheric Administration (NOAA) maintains the database of registered ELTs.
NOTE: For the following example, the programming protocol is assumed to be Tail Number, Short Message (Aviation User Protocol). Other protocols are possible and the exact read-outs of the test set may vary. Refer to the applicable operation manual included with the test set or contact ARTEX for assistance.
To verify the digital message, perform the following steps:
1) Disconnect the antenna coax cable at the ELT, connect test set or terminate as applicable.
2) Perform all necessary steps to prepare Test Set to receive 406 MHz signal including (but not limited to) turning on power, activating program or any other steps required for the particular Test Set being used.
3) Perform the “Installed Transmitter Test (Self-Test)” (paragraph 4.4.9, page 46) by cycling local or remote switch from “ARM/OFF” to “ON” and back to “ARM/OFF”. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL ME406P ELT(31)
