Fluke ScopeMeter 123 Service Manual page 34

123
Service Manual
TURN ON & BATTVOLT > 4 & MAINVAL=L
Operational
Table 3-2 shows an overview of the test tool operating modes.
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.
VGARVAL=L
VGARVAL=H
TURN ON or
MAINVAL=H
Flash ROM OK
MAINVAL=H
Mode
MAINVAL=L
BATTVOLT < 4V
or
AutoShutDown
or
TURN OFF
Figure 3-2. Fluke 123 Start-up Sequence, Operating Modes
Idle mode
Off mode
Flash ROM
NOT OK
Mask StartUp
OR
&
Extern StartUp
MAINVAL=L & (TURN OFF or BATTVOLT<4V)
Software
TURN OFF&MAINVAL=H
TURN ON & MAINVAL=H
TURN OFF
Operational &
Charge Mode
TURN ON
Battery refresh
Mask Active
mode
& TURN ON
Charge Mode
MAINVAL=L
TURN OFF