Newcon Optik LRB 20000 - Manual (Page 8)

To secure trouble-free operation of the rangefinder:
- be prompt in replacing the rechargeable battery by freshly
charged when the red LED in the left-hand eyepiece of the range
finder starts to illuminate;
- keep the range finder dry at all times especially in the cold
season of the year;
- after exposure to subzero temperatures keep the range finder at
room temperature for at least two hours before unpacking and
then mop up the condensed moisture;
- while operating the range finder at temperatures above 35˚ C
and exposing to direct sunrays, attach cover AEP 42.63.021
taken from individual SPTA set to keep away sunlight.
Moistening the cover with water is permitted to cool off the
range finder.
After replacement of emitter and (or) control circuit board make
entries in Section 4 of this manual as to their new serial numbers
and basic characteristics.
- Charged as described under 15.3;
- Discharged by setting the toggle switches to the
DISCHARGE and MAIN positions until the DISCHARGED
light diode flashes on and off to indicate the discharged
condition. Charge up the operating voltage for 15 hours as
described under 15.3.
15.3.3. The battery that has been stored in the discharged
condition for over 3 months is subject to two processing cycles
before use.
Cycle 1
- Charging for 24 hours with the toggle switches set to the
CHARGE and PREPARATORY positions on the charging
device;
- Discharging with the toggle switches in the DISCHARGE
and PREPARATORY positions, until the LED labelled
DISCHARGED flashes.
Cycle 2
- Charging as directed under 15.3.;
- Discharging with the toggle switches set to the
DISCHARGE and MAIN positions on the charging device,
until the DISCHARGED diode flashes.
If the minimum discharging time is 5 hours, charge the battery
up to the operating voltage as directed in 15.3.
If the discharging time is between 5 and 3.5 hours, subject the
battery to another Cycle 2 as described in 15.3.3, then charge it
up to the operating voltage as described in 15.3.1.
It’s prohibited to use the battery, if the discharging time was
under 3.5 hours.