688 Keysight N9927-90001 User’s Guide
Working with the Lithium-Ion Battery
Viewing the Battery Charge Status
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
connected.
3. Battery Present – ON or OFF indicates if a battery is installed.
1. Voltage – measured by the battery’s sensor.
2. Current – amount of current being consumed when operating from
internal battery. If battery is charging, indicates amount of charging
current.
3. Battery Temperature – internal temperature of the battery as measured by
a sensor embedded in the battery.
4. Present Run Time to Empty – minutes of power remaining based on
amount of current being used now.
5. Charge Cycles – number of charge cycles the battery has experienced.
Charge cycle defined as ≥80% change in relative state of charge.
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.
Battery not charging with 84% battery life
remaining.
Battery fully charged. A fully charged battery
MAY NOT read 100%.
Table 32-1 Front Panel Icons
Icon Status
Items 4 through 8 are read directly from the battery. The information is
based on the battery’s internal sensors and memory.
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