2-6 Powering the Model 831 Model 831 Manual
icon directly reflect the remaining Estimated Run Time as
displayed by the instrument.
Low Battery
As the battery nears end-of-life (1% of capacity), the empty
battery symbol will begin to flash. The unit will shut down
in a short time because the battery voltage is too low.
When the battery is at the end-of-life, the Model 831 will
stop running, save all data and instrument status, then turn
off. When the unit is turned on again, with fresh batteries or
an external power supply, the unit returns to the state it was
in when it shut down.
If external power is supplied through the USB connector, the
battery icon is replaced with the External Power icon, as
shown in Figure 2-7.
FIGURE 2-7 External Power Icon
When external power is connected to the Model 831, the
unit is not dependent on batteries. The Estimated Run Time
calculation is valid only if there is no external power.
Inserting Batteries
There are 2 tabs on the bottom of the
battery door that engage the case of
the Model 831.
The battery compartment of the Model 831 is located on the
back of the unit. There is a clip on the battery door. To
remove the battery door, place a finger on the clip and push
it downward towards the battery door while pulling away
from the body of the instrument. The battery door will pivot
away from the unit.
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