Ocean Signal PLB1 User Manual - page 10
PLB1 USER MANUAL
10
Part No 912S-01260
4.2
GPS test
WARNING: AS TESTING THE GPS RECEIVER EXPENDS SIGNIFICANT AMOUNTS OF
BATTERY ENERGY DO NOT TEST THE GPS OPERATION MORE THAN ONCE A YEAR.
TESTING THE GPS RECEIVER IS LIMITED TO10 TESTS OVER THE LIFETIME OF THE
BATTERY, AFTER THIS THE GPS TEST WILL FAIL TO ACTIVATE.
THIS TEST MUST ONLY BE PERFORMED WHERE THE PLB HAS A CLEAR AND
UNOBSTRUCTED VIEW OF THE SKY. THIS IS REQUIRED TO ALLOW THE GPS RECEIVER TO
ACQUIRE A SIGNAL FROM SUFFICIENT SATELLITES TO ALLOW IT TO DETERMINE A
POSITION. MAKE SURE THE AREA MARKED “GPS ANTENNA” IS NOT OBSTRUCTED.
Press and hold the TEST key. The LED will illuminate red to indicate the key has been
pressed, then start flashing. Shortly after, the LED will cease flashing and become a steady
red light. The TEST key can now be released.
During the GPS test the LED will repeat a long red flash followed by a short green flash
until either a postion fix is obtained or the GPS test fails. A successful test will be indicated
by the strobe flashing and the green LED flashing. The number of green flashes indicates
one more than the number of GPS tests remaining (eg 8 flashes = 7 tests remaining). A
failure is indicated by the red LED flashing. The test can be ended by holding the TEST key
for five seconds.