Anritsu S251B - Manual (Page 17)

The battery status can also be checked by pressing the SYS key and the STATUS soft key.
The Status table will display the remaining battery charge as a percent, as shown below.
Once all the power has drained from the battery, the Site Master display will fade. At this
point, your Site Master will switch itself off and the battery will need to be recharged.
Discharging the NiMH Battery
The NiMH battery will last longer and perform better if allowed to completely discharge
before recharging. For maximum battery life, it is recommended that the NiMH battery be
completely discharged and recharged once every three months.
To discharge the battery, leave the Site Master switched on until the battery is drained. The
Site Master will display a
LOW BATT message and an audio warning when the battery be-
gins to run low. Allow the battery to fully discharge until the Site Master switches itself off.
NOTE:
Do not attempt to discharge the battery by any other means. Never short-circuit
the battery terminals.
Battery Life
It is normal for NiMH batteries to self-discharge during storage. To minimize battery dis-
charge during storage, it is recommended that the battery be removed from the Site Master
if the Site Master is not to be used for a long period of time.
It is normal for NiMH battery to degrade to 80% of original capacity after 12 months of
continuous use.
The battery can be charged and discharged 300 to 500 times, but it will eventually wear out.
The battery may need to be replaced when the operating time between charging is notice-
ably shorter than normal.
Important Battery Information
2 - 3
Chapter 2 Getting Started
STATUS
OSL CALIBRATION
FREQUENCY = 2.0 – 1000 MHz
CAL TEMPERATURE (24–54
° C)
CURRENT TEMPERATURE = 38 ° C
BATTERY CHARGE = 75%
PRESS ESCAPE TO CONTINUE
Figure 2-2. Example Status Table Display