L3Harris narda PMM EP-600 User Manual page 43

The PMM EP-600/601/602/603/604 can be connected to the PC via fiber
optic either when ON or OFF.
When making measurements with PMM EP-600/601/602/603/604 the
power supply must be ALWAYS removed.
The min. battery voltage allowed for proper operation is of 2,05 V; it is
displayed by the PC software WinEP600. Lower values do require
recharging the battery.
The max. battery autonomy is of approx. 100 hours (with Filter 28 Hz
and Rate 2.5 sec), according to the filter setting.
The internal battery can be replaced at factory only; in case of
damage or incorrect operation contact your Dealer.
It is recommended to fully recharge the battery before long-term
storage of the probe; a full recharge shall be performed every 4
months since then.
Measurements 3-5