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 28 of 62
2)
Disconnect the battery pack from the ELT.
3)
Install test fixture 500-0057 in the power circuit in series between the battery pack connector and the ELT
connector (see Figure 7 Current Draw Test Setup).
Figure 7 Current Draw Test Setup
4)
Terminate the ELT RF output with a 50 Ω load.
5)
Set the ammeter for the lowest possible scale and connect the positive lead to TP1 and the negative lead to
TP2.
6)
Measured current must be < 5 µA (micro-amps).
CAUTION:
THE NEXT MEASUREMENT COULD CAUSE THE INTERNAL PROTECTION FUSE OF
THE AMMETER TO BLOW, IF PRECAUTIONS ARE NOT OBSERVED.
7)
Set the ammeter current range to accommodate 4A (amp).
8)
Activate the ELT.
9)
Allow ELT to transmit a 406 MHz burst. This will occur 50 seconds after activation.
10)
Set the ammeter to read approximately 60 mA of current.
11)
Observe reading. Current shall be ≤ 55 mA.
12)
Deactivate the ELT.
13)
Remove the test fixture and reinstall the battery pack in accordance with Figure 28 on page 55.
Hints:
a)
Short the meter leads (at the meter) with a banana plug-type jumper lead to protect the fuses in the meter.
b)
Using a spectrum analyzer as a load device, detect when the 406 MHz burst has occurred.
c)
Remove the jumper and read the current just after the burst.
d)
Replace the shorting jumper before the next burst.
