Commercial in confidence
85-909
PLB service manual
Issue 4
Page 8
3. MAINTENANCE PROCEDURES
3.1. Inspection
Tamper seal
Check tamper seal is intact.
If seal is damaged or is non-standard in any respect, battery state
must be considered suspect.
Contact customer to confirm any history of PLB activation.
Plastic damage
Check that the flip lid is present.
Check plastic body for signs of damage.
Check gasket for signs of wear or cracking. Slight damage not
extending beyond the edge of the plastic body is acceptable.
GPS
For GPS-fitted units only, check that there is no metallic object, such
as a metallised label, in the vicinity of the GPS antenna
Battery expiry
If the battery has less than 6 months before expiry, contact
customer and recommend replacement.
Battery
Remove the battery and check that the battery pins are straight and
are not corroded. Measure the open circuit battery voltage; this must
be greater than the appropriate limit in the table below, otherwise
reject the battery. Check that the ‘O’-rings are present and in good
condition. Ensure that the Identity information is clear. Refit the battery.
Battery voltage limits
85-720-004
(-20 °C Class 2)
>12.0 V
85-740-004
(-40 °C Class 1)
>11.8 V
Switches
Check that the switches are clean and not masked by dirt
Lanyard
Check that the lanyard has not suffered damage
Antenna damage
If the antenna has been deployed, ensure that it is not creased
or cracked.
Unit identity
While the battery is removed, check that the programmed information
on the rear label is clear and correct
GPS antenna is
under this area
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