Global Power Technologies MAINTENANCE
302842 Rev0 | Sentinel Page 39 of 61
5.3.2 JUMP-STARTING THE SENTINEL TEG
If the start-up battery pack is depleted, the Sentinel may be jump-started with an external 12 VDC
battery, such as a vehicle battery, using a specialty cable assembly offered by GPT. The jump-start
cable is equipped with protective features that ensure the Sentinel and the external battery operate
safely. To order the TEG jump-start cable, contact GPT and quote part number 300495. Refer to the
application note that ships with the cable for jump-start instructions and diagrams.
WARNING!
Declassify the area before opening the instrumentation enclosure, electronics
enclosure, and attempting a jump-start.
5.3.3 REPLACING THE START-UP BATTERY PACK
Replace the start-up battery pack every five years of service. To replace the battery:
1. Disconnect the battery wiring from the connector on the bottom left corner of the battery board.
2. Remove the two screws on the bottom of the battery support bracket while supporting the
battery board with one hand. Save the screws for re-installation.
3. Remove the battery support bracket and the start-up battery pack, being careful not to allow the
start-up battery pack to fall off.
4. Place the new start-up battery pack in the battery chamber.
5. Attach the battery support bracket to the new start-up battery pack.
6. Secure the battery support bracket with the two #10-32 x 5/16" screws that were previously
removed.
7. Reconnect the battery wiring harness to the new battery board.
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