Technical data

178 Chapter 11
Working with Batteries
Battery Specifications
Working with Batteries
Battery Specifications
The N1996A Agilent CSA Series Spectrum Analyzer uses the Inspired
Energy NF2040HD24 Smart Battery, which produces 10.8 volts DC at
approximately 6 A. The NF2040HD24 is a Lithium Ion battery pack,
which uses the System Management Bus (SMBus) interface to
communicate with the analyzer and charger. To charge the batteries,
use only the Agilent approved SMBus charger of Level II or higher or
the N1996A.
• The battery is designed for approximately 300 full charge/discharge
cycles at room temperature and under normal rates of discharge.
• The NF2040HD24 uses electronically programmable read-only
memory (EPROM) to store key data regarding the battery cells and
charge capacity.
Protection Electronics
The NF2040HD24 SMBus battery uses several protection devices to
prevent damage to the battery and analyzer. The battery is internally
protected against excessive current draws and reduced loads (shorts),
excessive voltage and temperatures.
During charging and discharging, the battery will monitor and report
its voltage, current, and temperature. If any of these monitored
conditions exceeded their safety limits, the battery will terminate any
further charge or discharge until the error condition is corrected.
Analyzer Operation: Battery Current Drain in the Off Mode
When the analyzer is operating from battery power, it continues to
draw current in the off mode. When in off mode, the analyzer draws
<10 mA per hour, or approximately 38 days to discharge. Agilent
recommends that if the analyzer is not going to be used for an extended
period of time, remove the batteries from your analyzer. This will
ensure you have sufficient battery capacity if you intend to operate the
analyzer from battery power.
Battery and Charger Part Numbers
Option BAT
Description Part Number
NF2040HD24 Battery (quantity 2) 1420-0891