ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
570-5000 Rev. U
Company Confidential
25-62-11
Page 28 of 66
LOAD IS IMPROPERLY INSTALLED, THIS STEP SHOULD BE ONLY PERFORMED BY
AN EXPERIENCED TECHNICIAN/MECHANIC.
1)
Reinstall the battery in accordance with SUBTASK 25-62-11-450-001 on page 55.
NOTE:
If tests 5a through 5h are going to be performed, the battery may be temporarily
installed with only two screws, located on a diagonal from each other.
2)
Perform this functional check within the first 5 minutes after the hour (UTC), as required by AC
43.13-1, Chapter 12, § 12-22, Note 3.
3)
Notify any nearby control tower of your intentions.
4)
Install the 151-2012 test plug (receptacle) on the ELT plug or jumper ELT plug Pins 5 and 8.
NOTE:
The ELT cannot be activated using this procedure unless Pins 5 and 8 on the ELT
plug are jumpered. See Figure 22 on page 50.
5)
Verify the ELT switch is in the “OFF” position.
6)
Monitor 121.5 MHz on an AM receiver.
7)
Activate the ELT by using a rapid forward (i.e., throwing) motion in the direction of the arrow on the
ELT label, followed by a rapid reversing action.
8)
Verify activation by listening for the aural sweep tone on the receiver.
9)
Reset the ELT by toggling the control switch to the “ON” position and then back to the “OFF”
position.
SUBTASK 25-62-11-750-002
G.
G-Switch Functional Check (Helicopter Models Only)
–
Item 4b
1)
This procedure outlines the steps required to test the five-axis G-switch installed in ARTEX Helicopter
Model (HM) ELTs.
2)
Testing of the primary and five axis G-switch can be accomplished by simulating a rapid deceleration
in the required direction of the G-
switch. Although the “football throw” test as outlined in item 4a is
sufficient to test the forward G-switch, a sturdy padded surface, such as a padded chair or foam-
covered workbench, is required to simulate the G-force required to trigger the remaining axes. The
padding of the surface is required to prevent damage to the ELT.
NOTE:
The fixed wing G-switch is triggered by approximately 2.3 Gs of deceleration (axis +X
in Figure 8), whereas the five-axis G-switch is triggered by 12.5 Gs of deceleration
(axes -X, -Y, +Y, -Z, and +Z in Figure 8), and requires a significant force to activate.
The higher G-rating precludes inadvertent activation in helicopter applications but will
allow for activation during a mishap.
Figure 8 ELT Orthogonal Axes
3)
Keep G-switch loop and 50-ohm load installed on the antenna port from Item 4a installed.
4)
Utilizing the sturdy padded surface, hold the ELT 10 inches (26.1 Centimeters) above the test area
and thrust down forcefully maintaining a level axis into the pad to test the -X axis (see Figure 8).
5)
Repeat step 2 for the -Y, +Y, -Z, and +Z axes (see Figure 8).
