Keysight N9923A FieldFox User Manual page 157

Primary Overtemperature: A PTC(positive temperature coefficient) polyfuse in series
between the Li-ion cells and the charging and discharging transistors will open up
and limit current flow to the battery terminals as a function of very high
temperatures. This protection is resettable once the overstress condition is removed.
The maximum operating temperature of this fuse is 85C.
Secondary Overtemperature: A second PTC polyfuse built into each Li-ion cell will
open up and limit current flow as a function of very high temperatures.
Tertiary Overtemperature: A current interrupt device (CID) within each Li-ion cell will
permanently open up when the temperature reaches 95C. As each cell fuse is
permanently interrupted, overall battery performance will become severely
degraded, up to and including disabling the battery.
Overcurrent Fuse: This is a one-time blow fuse with a rated current of 12A.
Batteries: Safe Handling and Disposal
To learn how to safely handle and dispose of the FieldFox battery, refer to the
Material Safety Data Sheet for the manufacturer of the battery at:
http://na.support.keysight.com/fieldfox/help/Reference/MSDS.htm
Environmental Requirements
Refer to the Specifications section of this document.
Electrical Requirements
The FieldFox allows you to use either the lithium-ion battery or the AC/DC adapter -
both are included.
Electrostatic Discharge (ESD) Precautions
The FieldFox was constructed in an ESD protected environment. This is because
most of the semiconductor devices used in this instrument are susceptible to
damage by static discharge.
Static charges are generated in numerous ways, such as simple contact, separation
of materials, and normal motions of persons working with the FieldFox. To prevent
instrument damage, practice industry accepted techniques for handling static
sensitive devices when using the FieldFox.
Very often, coaxial cables and antennas also build up a static charge, which, if
allowed to discharge by connecting to the FieldFox, may damage the instrument
input circuitry. To avoid such damage, it is recommended to dissipate any static
charges by temporarily attaching a short to the cable or antenna prior to attaching to
the instrument.
FieldFox Markings
Safety Considerations
The CSA mark is a registered trademark of CSA International.
The RCM Mark is a registered trademark of the Australian
Communications and Media Authority.
This symbol combines the following three markings:
CE indicates product compliance with all relevant European legal
Directives (if accompanied by a year, it signifies when the design was
proven).
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