Casio IT-2000W manual Main Battery Voltage Monitoring, LB1 LB0

Main Battery Voltage Monitoring

If the main battery voltage reaches LB1, the system issues a warning buzzer. If this warning buzzer sounds, either start recharging the battery or replace it with a fully charged battery as soon as possible. If one of these measures is not taken within ten minutes, the system will forcibly turn off the power for safety. The following diagram shows the main battery voltage against the time axis.

Main

Battery voltage

LB1

LB0

Generate warning buzzer

Voltage level to operate.

(a)	Turn the power OFF.
	(b)	Start recharge.
	(c)	(e)	(d)
10 minutes			Time
	Fig. 2.6

(a)If the main battery voltage reaches LB1, the low battery voltage warning alarm sounds.

(b)Unless the main battery is either replaced or recharged within ten minutes, the system power is automatically turned off to protect the data.

(c)If the main battery voltage falls further and reaches LB0, the system automatically shuts off the power to the main unit (critical suspend).

(d)If the main battery voltage drops below LB0, the main unit power cannot be turned on even if the power switch is pressed.

(e)If the main unit is mounted on the I/O Box or connected to the AC adaptor, charging of the battery is initiated and the main battery voltage will gradually increase.

(f)Once the main battery voltage has been recharged to an operable level, it is possible to turn on the power to the main unit.

For information about the method used to replace the main battery refer to Chapter 2.2.6 “ How to Replace or Recharge Batteries”.

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