ACR&Artex C406-2 HM - Manual (Page 44)

ACR ELECTRONICS, INC / ARTEX PRODUCTS
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
C406-2 (453-5000), C406-2HM (453-5001)
25-62-11
Page 44 of 87
JUN 20/13
SUBTASK 25-62-11-750-008
M. Current Draw Test – Item 5f
CAUTION: EXERCISE EXTREME CAUTION TO AVOID CAUSING A SHORT CIRCUIT CONDITION,
WHICH WILL BLOW THE FUSES IN THE BATTERY PACK. THIS TEST SHOULD ONLY BE
PERFORMED BY AN EXPERIENCED TECHNICIAN/MECHANIC.
CAUTION: ALL “ON” STATE CURRENT MEASUREMENTS MUST BE MADE WITH THE RF OUTPUT
(I.E., ELT ANTENNA CONNECTOR) LOADED WITH 50 OHMS RATED FOR 5 WATTS.
EITHER A RESISTIVE LOAD OR EQUIPMENT WITH 50 OHM IMPEDANCE PADDED WITH
10 DB/5 WATT ATTENUATOR. REFER TO SUBTASK 25-62-11-750-002 ON PAGE 40.
(1) Verify the ELT control switch is in the “OFF” position.
(2) Separate the battery pack from the ELT.
(3) Disconnect the 2-wire ELT power connector.
(4) Install test harness 611-0024, or equivalent, in the power circuit. See Figure 9.
Figure 9 Current Draw Test Setup
(5) Read the current draw on the ammeter. Measured current should be 0 µA (micro-amps), and
must not be more than 6 µA.
(6) Verify the ammeter is set to accommodate a range of at least 3.5 amps.
(7) Activate the ELT by placing the control switch in the “ON” position.
(8) Allow the ELT to stabilize for at least 30 seconds to avoid false readings.
+
A
—
CIRCUIT BOARD IN
BATTERY PACK
TO ELT
611-0024
TEST HARNESS