User's Manual

123
Service Manual
3-8
Battery Refresh
In the following situations the batteries will need a deep discharge-full charge cycle,
called a “refresh”:
• every 50 not-full discharge/charge cycles, or each 6 months. This prevents
battery capacity loss due to the memory effect.
• after the battery has been removed, as the test tool does not know the battery
status then.
The user will be prompted for this action when he turns the test tool on, directly
following the start up screen. A refresh cycle takes 16 hours maximum, depending
on the battery status. It can be started via the keyboard (USER OPTIONS, F1,
activate refresh) if the test tool is on, and the power adapter is connected. During a
refresh, first the battery is completely charged, then it is completely discharged (the
test tool is powered by the battery only, and the power adapter must be connected!),
and then it is completely charged again.
OR
Extern StartUp
Software
Operational
Mode
Operational &
Charge Mode
Charge Mode
MAINVAL=L & (TURN OFF or BATTVOLT<4V)
TURN ON & MAINVAL=H
TURN ON & BATTVOLT > 4 & MAINVAL=L TURN OFF&MAINVAL=H
MAINVAL=H
BATTVOLT < 4V
or
AutoShutDown
or
TURN OFF
TURN OFF
MAINVAL=L
Off mode
Mask StartUp
Mask Active
mode
Flash ROM OK
Flash ROM
NOT OK
TURN OFF
Idle mode
VGARVAL=L
VGARVAL=H
TURN ON or
MAINVAL=H
MAINVAL=L TURN ON
Battery refresh
& TURN ON&
Figure 3-2. Fluke 123 Start-up Sequence, Operating Modes
Table 3-2 shows an overview of the test tool operating modes.