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2 Diver Wireless Tender Communicator - User Manual - Submarine ...

2 Diver Wireless Tender Communicator - User Manual - Submarine ...

MAINTENANCEPROBLEMS AND

MAINTENANCEPROBLEMS AND THEIR POSSIBLE CAUSES (continued) 8.4Low Battery IndicationIf the unit is a standard unit (dry cell batteries), replace the batteries with a new fresh set.If the unit has rechargeable batteries and the battery voltage is low, charge batteries for aminimum of 24 hours to fully charge battery. Battery will charge anytime the unit is plugged intothe AC line, make sure the AC power circuit being used is not switched off at night. The preferredmethod to charge the battery is with power off. The charger circuit is designed to maintain thebattery at full charge during normal operation, and power can be left on without damage to thebattery.The battery voltage can be checked by measuring across the yellow jacks on the front panel. Turnthe unit on; if the unit is plugged into the AC line, the measurement will be the output of the batterycharger. To measure the battery voltage, disconnect the unit from the AC line.The voltage at full charge with the charger on should be between 13.0 and 14.0 volts. With thecharger off, a fully charged battery should be between 11.75 and 12.5 volts. The battery voltage ofa discharged battery (rechargeable) is 10.0 volts; the battery should not be operated below thispoint as permanent damage will occur. The rechargeable batteries used in the Amroncommunicators are a gel cell design.The battery capacity for the /23 option is 13 amp/hr; the quiescent current of a standard unit is0.25 amps. This would provide a theoretical operating time of 52 hours. The battery capacity forthe /24 option is 6.5 amp/hr; the quiescent current of the standard unit is approx. 0.25 amps. Thiswould provide a theoretical operating time of 26 hours. During usage the current requirement willincrease depending upon the volume level setting, the number of divers connected, other optionsinstalled, and how often the push to talk function is used.The gel cell battery has an expected life of 3 years or 200 charge discharge cycles.WARNING: Should it become necessary to change the 12V battery, be sure to connect the REDwire to the Positive terminal and the BLACK wire to the Negative terminal. A momentary reversalof polarity will destroy the electronics of unit. There is a fuse F3 in the charger card secondarycircuit located next to J2. When reversing internal battery terminals, this fuse will blow to protectthe electronic circuits and wiring from being damaged. F3 fuse is replaceable with 3.15A-250VSlow Blow Micro Fuse.40

DRAWINGS & SCHEMATICSGeneral 9.1The following drawings illustrate the electrical and mechanical details of the AMCOM II DiverCommunications. The corresponding parts lists for each drawing are detailed in the parts listssection, or are included as part of the drawing.RevisionsAs drawings are updated, information about changes is incorporated into a revision sheet. Thisrevision sheet appears in the manual immediately after the drawings. It lists the drawing number,reference designator of the part or parts involved a description of the revision, and the effectiveserial number of the change. With this information the technician can determine the correctdrawing for the current version, and any previous version, of the unit covered by this manual. If therevision is applicable for all versions of the unit, it is not included in the revision notice, as thechange applies to all units.41

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