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Low Voltage Level
The IT-2000 continuously monitors the voltage of the main battery, the primary sub-battery, and the
SRAM card battery. This allows an application program to determine through the system library if
the voltage of each battery reaches a warning level.
The following table summarizes the low battery voltage warning levels, which application programs
can acquire through the system library.
Name Abbreviat-
ion
Objective
battery
Description
Low main battery
voltage warning
level
LB1 Main battery Indicates that the main battery voltage has
reached a limit level that requires a warning to
be issued. The system sounds the buzzer to
issue an alarm. If this occurs, the user must
replace the main battery within ten minutes. If
the battery is not changed within ten minutes,
the system automatically executes the suspend
process.
Low sub-battery
voltage warning
level
LB2 Sub-battery Indicates that the sub-battery voltage has
reached a limit level that requires a warning to
be issued. Since the system does not issue an
alarm, the application program must execute a
warning by acquiring the status from the
system library.
The sub-battery must be replaced according to
the procedure described later.
Low SRAM card
battery voltage
warning level
LB3 SRAM card
battery
Indicates that the SRAM card battery voltage
has reached a limit level that requires a
warning to be issued. Since the system does
not issue an alarm, the application program
side must execute a warning by acquiring the
status from the system library.
The SRAM card battery must be replaced
according to the procedure described later.
There is also a main battery inoperable level (LB0). This is the status of the main battery when its
voltage falls below LB1. If this happens, the system executes an emergency power off (critical
suspend). Therefore, this level is also referred to as the emergency escape process level.
This status cannot be acquired from the application side, since the system turns off the power as
soon as the voltage reaches LB0.