Ameri-King АК-451-Series - Manual (Page 20)

39
3.2.3.4 Current draw tests:
CAUTION: The following tests involve measurement of the lithium battery pack.
Exercise extreme caution to avoid causing a short circuit condition which will blow
the fuse in the battery cell. It is recommended that only an experience technician
perform these tests.
A test harness (P/N TS-451-HN-1) may be ordered from Ameri-King Corp. at 714-
842-8555
All tests must be performed in an RF screen room or with the ELT in a shielded
container that will substantially attenuate the RF signal.
All "ON" state current measurements must be made with the RF outputs 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, i.e. a spectrum analyzer).
NOTE: the ELT may activate (turn "ON") when the various connections are initially
made during the following current tests. This is normal. Press the RESET Switch, to
Reset the unit.
"OFF" Mode Current Measurement:
• Remove the battery pack as described in Section 2.5.1
• Disconnect the 2-pin harness
• Install the test harness P/N TS-451-HN-1 and inline ammeter as shown in Figure 4-2
• Ensure the ELT is "OFF"
• Measure the current with the ammeter. The measured current should be 0 microamps
(uA).
"ARM" Mode Current Measurement:
• Measure the current with the ammeter. The measured current should be not more than
20 uA.
"ON" Mode Current Measurement:
Note:
Current draw during this test may exceed 2.0 Amps during the 406.028 MHz burst.
Ensure the ammeter is set on the appropriate range to accommodate this level of
current.
• Activate the ELT, allow to stabilize, by select ON.
• The measured steady state current should not exceed 150 milliamps (mA).
When the 406.028 MHz module is on (generating the 406.028 MHz burst)
the current may exceed 2.0 amps.
• Turn the ELT OFF
• Disconnect the test harness P/N TS-451-HN1
• Reconnect the 2-pin module power harness
• Reinstall the battery pack as described in Section 4.3.4
40
3.2.4 AUDIO MODULATION, PERFORMANCE TESTING:
Perform the transmitter tests by activating the ELT and listening on 121.5 MHz.
The audio swept tone should “sound” like an ELT.
3.2.5
TRANSMITTER FUNCTIONAL TEST:
Perform Transmitter Functional Test per paragraph 2.3 above, including all Test
paragraphs
2.3.1 through 2.3.4.
Note: All ELT “ON” tests should be performed within the first five minutes of the
hour.
3.2.6
PERFORMANCE TEST MARKING AND LOG BOOK ENTRY:
Following satisfactory completion of all of the above Performance Testing, the date
on which the test was performed shall be marked on the external casing in a legible
and permanent manner.
Enter the test date and Technician Initials, as ELT Pass or Fail, into the aircraft Log
Book.
3.2.7 SHIPPING:
In order to prevent accidental activation of the ELT during transit, the ELT
ON/OFF/ARM Main Switch must be set in the “OFF” position.
Note: The ON/OFF/ARM Switch is lever locked type.