Sea-Bird Electronics SBE 38 Bedienungsanleitung PDF herunterladen (Seite 108)

Manual revision 006 Appendix I: Functional Description and Circuitry SBE 19plus V2

108

Battery Wiring

SBE 19plus V2 standard main battery is a series connection of D-cells that

drop into the battery compartment as a cluster of end-to-end stacks, three

batteries each (standard 9-cell battery pack has three stacks). The positive

battery connections are contact areas on double-thick printed circuit disks that

form the internal bulkhead and battery retainer plates. Battery negative

contacts are heavy beryllium-copper springs. The three cell stacks are aligned

by plastic insulated aluminum spacers which also serve as electrical

interconnects. The battery-to-circuit card connection is made by means of a

Molex-type 3-pin pc board connector (JP3 on the power PCB).

The Power PCB contains three series-connected Panasonic BR-2/3A lithium

cells (non-hazardous) which are diode OR’d with the main battery (and

external power source, if used). The back-up lithium supply is capable of

maintaining the buffer and the real-time clock if the main batteries and/or

external power are removed. If the back-up lithium battery voltage (Vlith in

the GetSD or DS response) falls below 7 volts, replace the back-up batteries.

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Sea-Bird Electronics SBE 38 Bedienungsanleitung Seite 108