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SECTION 19 TROUBLE SHOOTING / MISCELLANEOUS NOTES
Battery testing procedure:
At an ambient temperature of 25C +/- 5C, remove the battery from the ELT and measure
the open circuit voltage. This should be above 11.5 volts. Connect a 15 watt 12 volt
automotive bulb across the battery contacts while monitoring the voltage it will initially be
below 10 volts after 15-25 seconds it should increase to above 10 volts.
An alternate method to test the battery is to separate the battery and transmitter section,
and use jumpers to connect the negative contact of the battery, to the negative contact of
the transmitter. Connect an amp meter capable of measuring a minimum of 3 amps across
the positive battery terminals, and the transmitter terminals. Place a second volt meter
across the terminals. Place a 50 Ohm load on the antenna BNC connector, and perform a
self test by switching the ELT from the “Off” position to the “Armed” position. During the
test current should be in the range of 1.5 to 2.2 amps voltage should stay above 9.5 volts.
See Section 14 Canadian Maintenance Procedures “caution” before performing this test.
