Table of Contents
Advertisement
3. OPERATION CHECKING ON HARDWARE
JCY-1900/1950 VDR Service Manual
3.2. Float Free Capsule Unit : NDH-339
It recommends testing the following every month.
3.2.1. EPIRB function test
There are two different kinds of tests that can be performed: "NORMAL SELF-TEST" and "EXTENDED SELF-TEST
INCLUDING GPS-TEST".
"EXTENDED SELF-TEST" involves both the self-test and GPS-test, so this test is recommended.
* What the self-test actually does is to send out a short test signal on 121,5 and 406,037MHz, testing the output of the
transmitter. While transmitting the test signal, the battery voltage, output power and phase lock is tested.
* During the test of the 406MHz transmitter a test message is transmitted, this test message is coded with a special syn-
chronization code and will not be recognized as real alert by the Cospas-Sarsat satellites.
* The GPS-test might take up to 2 minutes to be successful. Limit this test to maximum once per month because this test
will reduce lifetime of EPIRB battery. The extended self-test are imitated to 60 for a period of 5-year.
1) NORMAL SELF-TEST
・Release front cover by removing the cotter pin.
・Push and hold switch in TEST position for 15 seconds.
DOC No. 7ZPNA4409
Cotter pin
50
Hide quick links:
Advertisement
Table of Contents
