User Manual

RS02109/0814/CD 13 www.cdtechno.com
The t o p r o w of con n ect or s is t o b e inst a ll ed first, t h en t he s e co nd row down and so on, work ing fr om the
top down. W hen i nsta lling conn ec tors, install the top (upper most) bolt first. Complete connector installation
by torquing all conn ections t o 110 in-lb. [1 2.4 N-m] , using an in s ulated torque-wrench.
NOTE:
Over-torquing can damage the post seal
and degrade connection integrity.
After torq uing all connect ions and with t he batter y sti ll on open c ircuit ( not connected to the charging
source), take post-to-pos t resistance measur ement s. St art at one e nd of the str ing an d work to the ot her
end, recording micro-ohm r e sist an c e of e ach i nte r-cell connection between cells. Clean and re-torque
connections (see Appendix B) of similar size connectors which exceed ±10% percent of the average resistance
of battery connections or five micro-ohms, whichever is greater.
IMPORTANT:
Record and retain the resistance readings with the
initial charge information for future reference. See Appendix E.
CAUTION:
It is the sole responsibility of the user to check connections.
Never operate a battery w ith loose or corroded connections.
W hen checking connections, disconnect the battery from the load and the charging equipment
and fo l lo w al l t he pr ec aut io n ar y me as ur es outlined above and in the general safety references.
Some resistance m eas ur em ent eq u ipm en t m ay c a us e a s p ark when th e pr ob es ar e app li e d to th e
cell posts. Use appropriate safety precautions when conducting this measurement.
Typical cell and connection resistance values are provided in the Appendix according to cell type. In
addition, a listing of short circuit current in amperes is provided to further inform the user of the potential energy
available from these batteries.
A fter connecting all cells of the battery, check the battery voltage using a calibrated digital DC
voltmeter with at least three digits and 0.25% accuracy minimum. Batt ery voltage should equal
the open circuit voltage of an in divi dual c ell mul tipli ed by th e numb er of c ells in the battery.
Example: (24 cells) x (2.16 VPC) = 51.84 OCV. If the OCV does not equal t he expected value, inspect the
sequence of (+ ) to (-) con nect ions. Furth er inves ti gati on may r equi re re-inspecting each cell voltage
to confirm an acceptable value.
6.9 Ta p Connections
Tap connections may electrically unbalance the battery system and may v oid the warranty. If a
center tap is used, each side must have its own charging unit.