User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - SB421
TetraFlex® 7.5 Manual 1-13
1.1.6 SB421 Internal Battery Assembly
1.1.6.1 Battery kit maintenance
The battery is specified to a life time of 3-5 years depending on the use and environment.
It is recommended that the battery is checked at least every second year and exchanged if
necessary.
1.1.6.1.1 Installing batteries
1.1.6.1.1.1 Preparation
NOTE: To prevent electrical shock, it is highly recommended to ensure that the
battery terminals are disconnected and properly isolated, either with dummy
terminal shoes or by isolating with thick tape, crimp hose or similar while
removing and/or installing the batteries.
o Place the SB421 on the backside with the door opening facing upward
o Carefully unscrew the two screws holding the door cable assembly
Figure 1-11: Cable assembly
o Move the cable assembly to give access to the 1 nuts holding the ground connection
and the 4 threaded studs for battery base plate mounting
o Carefully remove the nut for grounding. Be careful not to damage the existing cabling