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4) Charging the Instrument
1. Be sure to turn the power of the unit off, and then insert the DC plug of the
provided AC adapter into the charging jack on the unit.
2. When the AC adapter is inserted into the outlet, rapid charging begins. (The
charging monitor lamp illuminates.) After rapid charging is completed (the charging
monitor lamp turns off), leave the battery connected for 2 – 3 hours for trickle
charging until the battery is fully charged. * Rapid charging alone will not fully
charge the battery.
* Before using the product for the first time after purchase, be sure to fully charge the
unit. Perform trickle charging for 14 - 15 hours after rapid charging ends, leave the
charging for 14 - 15 hours for trickle charging in order to fully charge the battery.
* If the battery temperature is higher than the temperature of the unit, a safety device
activates and charging cannot be started. Wait until the temperature of the battery
has fallen before beginning charging.
CAUTION: Be sure to observe the following in order to prevent deterioration of the battery.
●After rapid charging ends, do not leave the AC adapter connected to the unit for a long
period of time.
●Charge at a temperature of 5℃- 35℃.
When the battery is fully charged, the unit can be operated for up to 10 hours. If the
battery power is low during use, the "V" comment on the display flashes, the automatic
power off function activates, and the POWER lamp turns off. Be aware that if the power
switch is turned on again before charging the battery, the automatic power off function
may not activate sometimes. As a result the battery may become completely discharged,
causing the data in the internal memory to be lost.
The battery voltage will be low after the product is just purchased or when the product has
not been used for a long period of time. Be sure to charge the battery before use. In this
case, some time trickle charging may continue without illuminating charging monitor lamp
before rapid charging begins. This is not a malfunction. If rapid charging ends quickly and
trickle charging begins even when the internal battery is low, and this occurs several times
in succession, turn on the power switch and discharge the battery after trickle charging for
approximately 15 hours. Repeat this process several times to reactivate the internal
battery.
<Important> After using the product, if it will not be used for a long period of time, fully
charge the battery before storing the product. Even when the unit power is off, the
battery is still consumed at a very slow rate. Be aware that if the product is left disused
for a long period of time, the battery may become completely discharged. Be sure to
charge the battery before using the product again.
The laptimes related data including the calendar information in the internal memory is
deleted after approximately 1.5 - 2 months from a fully charged unit status. Be sure to
charge the unit once a month to keep the data.