ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
ELT 1000 (P/N: A3-06-2749-1)
Y1-03-0259 Rev. U
Company Confidential
Page 19 of 62
2.
Operation
A.
Overview
1)
A primary feature of the ARTEX ELT 1000 is its simplicity of operation.
2)
A connection jumper (“G-switch loop”) between pins 5 and 12 on the connector enables the G-switch circuitry,
allowing activation when the acceleration threshold is exceeded. The jumper is located in the mating
connector of the cockpit remote switch wire harness. When this connector is removed, the ELT can be
manipulated without the possibility of activation.
3)
With the G-switch loop in place, neither the cockpit remote switch nor the ELT local switch can be positioned
to prevent automatic activation. With the G-switch loop open (removed), the ELT cannot be activated by
dropping, rough handling or during shipping.
4)
Activation is indicated by the presence of the swept audio tone transmitted on the 121.5 MHz signal, the
buzzer sounding and the flashing cockpit remote switch and/or ELT local LED. All these indicators immediately
begin upon ELT activation.
5)
To deactivate the beacon, either the position of the local ELT switch or the cockpit remote switch must be
changed from “ON” to “ARMED”. If activation is from the G-switch, the switch position must first be set to “ON”
then changed to “ARMED”.
NOTE:
The ELT CANNOT be disarmed or disabled from the cockpit. Cockpit operation is limited to
activating and resetting the ELT.
6)
A warning buzzer is required by TSO C126a to indicate ELT activation when the aircraft is not operating. The
buzzer is powered by the ELT and is not dependent upon the aircraft power for operation. The indicator ‘beeps’
periodically, with the periods between pulses increasing after 12 hours.
B.
Normal Operation
NOTE:
The beacon will immediately begin transmitting at 121.5 MHz and will continue to do so until
the ELT is deactivated or 24 hours have expired.
NOTE:
The beacon will begin transmitting at 406 MHZ approximately 50 seconds after activation and
will continue to do so at approximately 50 second intervals until the ELT is deactivated or 24
hours have expired.
1)
In normal operation, the ELT is “ready to activate”. The cockpit remote switch and the local switch on the ELT
are both in the “ARM” position. The G-switch loop (connection jumper between pins 5 and 12 of the connector)
is in place to enable the ELT. In this condition, if the ELT movement causes the G-switch threshold to be
exceeded, the beacon will activate.
C.
Manual Activation
1)
The ELT may be manually activated by placing either the remote switch or the ELT local switch in the “ON”
position. This forces the ELT to activate, regardless of whether or not the G-switch loop is in place.
NOTE:
The ELT cannot be reset if either the cockpit remote switch or the ELT local switch is in the
“ON” position.
D.
ELT Reset
1)
If the ELT is inadvertently activated (for indications, see 4) above), reset it by moving either the cockpit remote
switch or the local ELT switch to the “ON” position, and then move it back to the “ARM” position. If the switch
is already in the “ON” position, move it to the “ARM” position.
E.
Functional Check
1)
A monthly functional check is recommended to verify operational status of the ELT. Perform in accordance
with ELT Reset Check – Item 5h.
