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Working with the Lithium-Ion Battery
Viewing the Battery Charge Status
Table 34-1
Front Panel Icons
Icon
Service Diagnostics—Battery Screen
The Battery screen displays the following information. To access the screen,
select System then Service Diagnostics then Battery.
Additional battery information is available using SCPI commands.
1. Status – Fully charged, No battery, Charging, Empty, or Discharging.
2. External DC Supply – ON or OFF indicates if an external DC supply is
3. Battery Present – ON or OFF indicates if a battery is installed.
Items 4 through 8 are read directly from the battery. The information is
based on the battery's internal sensors and memory.
1. Voltage – measured by the battery's sensor.
2. Current – amount of current being consumed when operating from
3. Battery Temperature – internal temperature of the battery as measured by
4. Present Run Time to Empty – minutes of power remaining based on
5. Charge Cycles – number of charge cycles the battery has experienced.
Built-In Battery Gauge
Each lithium ion battery has an LED gauge that displays its charge status. The
gauge is active unless the battery is in shut down mode.
To view the LED gauge, open the FieldFox battery compartment door, remove
the battery, then press the button on the battery.
836
connected.
internal battery. If battery is charging, indicates amount of charging
current.
a sensor embedded in the battery.
amount of current being used now.
Charge cycle defined as ≥80% change in relative state of charge.
Status
Battery not charging with 84% battery life
remaining.
Battery fully charged. A fully charged battery
MAY NOT read 100%.
Keysight N9915-90020 User's Guide
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