Lamar Technologies CA 1550 - Manual (Page 8)

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than C/10. For a 40 amp-hr battery C/3 would be 13.3 amperes, C/10
would be 4.0 amperes.
4) During this topping charge, check the voltage of each cell with the Fluke
77/AN meter. When every cell has reached at least 1.5 volts (1.55
optimal), the battery is charged regardless of the time. The battery is now
Ready For Issue.
Note 2: The ampere hour meter has a time delay of about 2 seconds. For longer
time periods resetting the 4159 timer will lose the ampere hour reading.
Therefore record ampere hours, then reset. Add the new amp hour reading to the
recorded reading. This is optional, as the full charging amp-hrs have been
observed.
Note 3: For a 30 ampere hour battery, if current is reduced to 10 amps, that's C/3.
The charger should now be in a constant current mode "if the voltage was
adjusted up to 34-35 volts." In this mode the battery would charge as long as you
have the timer set for. Please study NAVAIR 17-15BAD-1 to become acquainted
with the charge/discharge parameters, cell voltages, etc. for the particular battery
you are planning to charge on the 4159.
e. If battery did not fully charge per paragraph 1 a-c you may consider a
Constant Current charge discussed in ID, par D.
f. Check each cell with the fluke 77/AN multimeter. 1.55 volts per cell is
optimum, the range is 1.5 to 1.85 Volts per cell. When all cell voltages
are within this range, the battery is considered charged. See NAVAIR
17-15BAD-1 manual for cells out of range.
III. DISCHARGE
Note 1: Discharging with the 4159 unit determines the ampere hour capacity of
the battery and also reconditions the battery by breaking-up sulfation in SLABS
and crystalline adhesion in NiCads. Battery must be fully charged before
discharge testing. The discharge is constant current, as the current will remain
constant as set by the Discharge Current potentiometer (15) from the start of the
discharge procedure to the termination by time (Accept), or low voltage cutoff
(Fail).