Rion NL-42A, Инструкция по эксплуатации, Страница: 31 / 154

13
Preparations
AC adapter
To operate the unit with the AC adapter, connect it as shown below.
Important
To prevent the risk of damage, do not use any
AC adapter other than the NC-98 series.
The AC adapter NC-34 series used for the
conventional sound level meter cannot be used.
DC IN
5-7 V
I/O
AC OUT DC OUT USB
SD
DC IN
connector
AC adapter NC-98 series
Open
the bottom cover
To AC outlet, 100 V to 240 V AC, 50/60 Hz
Backup battery
The unit uses a backup battery (rechargeable battery) to operate the clock.
While power to the unit is on, the backup battery will be charged. It will
also be charged while power to the unit is off if external power is connected.
The relationship between charging time and retention period is shown below.
A full charge of the backup battery is achieved after 24 hours.
Charging time Retention period
1 hour 2 days
12 hours 30 days
24 hours 45 days
Use the AC adapter when connecting external power for battery charge while the
unit is turned off. The service life of the backup battery is limited. You should
have the battery replaced about once every fi ve years. Please contact your supplier.
Note
The charging time, retention period and service life
of the backup battery may vary depending on the
operating condition.
When the backup battery is old, the retention period
will be shorter.