Xenotronix NDX40 Series User Manual - page 6
NDX40 User’s Manual
Xenotronix/TLI
3
If batteries are hot or cold, allow them to adjust to room temperature before attempting to
charge them.
The standard output cable is black SPT-1 zipcord (parallel cord), size 18 AWG, 2-
conductor, 3-feet long and has a molded on barrel plug connector with a molded strain
relief. The output connector has a 5.5 mm (0.22”) O.D. and a 2.5 mm (0.10”) I.D. The
outer sleeve is negative and the center contact is positive. Your battery pack or charging
stand should have a power jack to match the barrel plug polarity.
When using the optional temperature probe, either insert it into the cell pack or press it
against the external surface of the cell pack.
When using the optional 4-wire output cable with thermistor, attach the red output lead to
the positive battery terminal and attach the black output lead to the negative battery
terminal. The thermistor must be attached directly to the battery case for it to adequately
detect the actual battery temperature. The green and white leads may be attached to the
thermistor in any order. The thermistor will terminate the high rate charge, and switch
into the float charge mode, whenever the battery temperature falls out of the safe
charging temperature range of 10 to 50 ºC. Typical reasons for an out of range battery
temperature are charging a battery in a too hot or too cold environment, trying to charge
too small a battery for the charger, or the failure of the -∆V circuit to detect a charged
battery.
CAUTION: This charger is not reverse protected. Make sure the battery connector is
properly wired or damage to the battery and charger may result when the charger is
plugged in.
The input voltage setting is displayed on the back of the charger. If this setting must be
changed, make sure the power cord is disconnected while operating the switch. Operating
the switch while the power is applied may cause damage to the switch or charger. Plug
the power cord into a properly grounded outlet that supplies the correct input power. The
charger should now be on and charging the battery. If the indicator is not lit, unplug the
charger and make sure the battery is properly connected to the charger. If there is still a
problem, check the AC input fuse and replace as necessary.
This battery charger is fully automatic. The charger starts out in the CHARGE mode. The
yellow indicator will be on continuously. In this mode, a high rate constant current will
be delivered to the battery. When the battery is fully charged, the -∆V circuit will detect a
drop in voltage as the battery begins to be overcharged, and the charger will switch into
the READY mode. The indicator will begin to flash indicating the battery is fully charged
and ready for use. In READY mode, a pulsed current will float the battery to maintain
charge. If the -∆V circuit fails to detect a drop in voltage the backup timer will still
switch the charger into the READY mode. When attempting to charge a dead battery
pack (less than about 1 volt) the charger will initially start out in the READY mode.
When the battery voltage rises, the charger will switch into the CHARGE mode. If the