Current Draw Test - Item 5F; Figure 10. Current Draw Test Setup - ACR Electronics Cobham C406-1 Series Abbreviated Component Maintenance Manual

SUBTASK 25-62-10-750-008
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 25-62-10-750-002, ON PAGE 41.
(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 10. 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.
COBHAM AVIONICS WULFSBERG ELECTRONICS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
C406-1 (453-5002), C406-1HM (453-5003)
A

Figure 10. Current Draw Test Setup

TO ELT
+
611-0024
TEST HARNESS
CIRCUIT BOARD IN
BATTERY PACK
25-62-10
Page 44 of 90
APR 06/10