Operating Status Displays; Calculating The Average Charging Time; Automatic Charging Control / Retention Charging; Timer Control - Tronic TLG 500 B1 Operating Instructions Manual

Operating status displays

The various displays have the following meanings:
■ The LED
are being alternately charged and discharged (Refresh-Function: older or long
stored batteries are being refreshed).
■ The LED
batteries are being discharged to reduce the memory eff ect.
■ The LED
maximum charge current.
■ The LED
battery charger has switched to trickle charge.

Calculating the average charging time

Depending on the type, age and remaining charge in the batteries, the charging
process can take various lengths of time. The average charge time can be cal-
culated using the following formula. Take note however that the times given are
only guiding values.
Charging Time (min) = Battery capacity (mAh) x 1.4 x 60

Automatic charging control / Retention charging

This battery charger controls the charging time for batteries of the types Ni-Cd
and Ni-MH separately. This control is based on the –Δ U ("minus Delta U")
calculation. In mathematics, with Delta Δ diff erences are indicated. In this case,
"Minus Delta U" means a negative voltage diff erence.
This charge identifi cation makes itself useful in the following eff ects: Should a
battery be charged with a constant current, its voltage rises continuously. When
a battery is full, its voltage reaches a maximum but falls again slightly with further
current fl ow. This light fall in voltage is recognised by the charging electronics and
the charge process is terminated. The battery charger automatically switches to
"Retention charging". This means that the batteries are no longer being loaded
with constant current, instead, with short current pulses. This counteracts the self-
discharge and the batteries are kept in a state of full charge.

Timer control

In addition, this battery charger has a timer control which automatically switches
over to retention charging after 15 hours. This serves as an additional protection
against overcharging should the charge termination not respond due to a possibly
defective battery.
TLG 500 B1
blinks red and green in 1 second intervals (not for 9 V): The batteries
blinks red and green in 1/2 second intervals (not for 9 V): The
glows red constantly: The batteries are being charged with the
glows green constantly: The batteries are fully charged and the
Charging current of the device (mA)
GB
7