mcmurdo Fastfind, Service Manual

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Commercial in confidence 85-909
PLB service manual Issue 4 Page 15
WARNING: The ‘O’ rings and lanyard must be fitted correctly, otherwise the PLB will
not be watertight.
Battery disposal
Hazardous chemicals Use gloves
Lithium battery packs should be discharged slowly, then disposed of through an approved
environmental disposal agent, or in accordance with local regulations.
The rate of discharge must not exceed 100 mA. It is recommended to discharge through a
resistance of a minimum value of 10 ohms per volt of the nominal battery voltage eg a
resistor of 120 ohms (2 W rating) is satisfactory for a 12 V battery.
UNDER NO CIRCUMSTANCE MAY THE BATTERY BE SHORT-CIRCUITED.
If the battery shows signs of electrolyte leakage, do not attempt to discharge. Refer to the
Safety Notices (section 1.4) for advice on correct handling.
3.8. Antenna rewinding
This details the procedure used to refit the antenna after it has been unfurled. A specialized
tool, the antenna winding key (85-753), is required for this operation.
Contents of kit (85-765)
Tamper cover 85-727
Tamper cover seal 85-733
Tamper label 85-726
Screw M3x6 85-743
Antenna retaining pin 85-739
If the PLB has been activated, the best course of action is to measure the off-load battery
voltage. If this is less than the figure given in 3.1, it is recommended that the battery is
replaced. If the antenna has been deployed accidentally without activating the PLB,
replacement of the battery is not normally required.
NOTE:
Check that the pin holding the antenna in position is made of black plastic (the early units
had stainless steel pins – these were found to sometimes change the RF matching of the
antenna). Replace steel pins with plastic.