254 Keysight N9923-90001 User’s GuideSafety ConsiderationsTo learn how to safely handle and dispose of the FieldFox battery, refer to the MaterialSafety Data Sheet for the manufacturer of the battery at:Overtemperature Discharging: The system microcontroller prevents thebattery from being discharged if the cell temperature exceeds 65C. Once theovertemperature discharging protection is tripped, the battery is automaticallyshut off which results in turning off the instrument as well.Passive ProtectionReverse Charging: A reverse protection diode prevents against damage or lostdata due to a reverse charge polarity applied to the battery terminals.Primary Overtemperature: A PTC (positive temperature coefficient) polyfuse inseries between the Li-ion cells and the charging and discharging transistorswill open up and limit current flow to the battery terminals as a function of veryhigh temperatures. This protection is resettable once the overstress conditionis removed.The maximum operating temperature of this fuse is 85C.Secondary Overtemperature: A second PTC polyfuse built into each Li-ion cellwill open up and limit current flow as a function of very high temperatures.Tertiary Overtemperature: A current interrupt device (CID) within each Li-ioncell will permanently open up when the temperature reaches 95C. As each cellfuse is permanently interrupted, overall battery performance will becomeseverely degraded, up to and including disabling the battery.Overcurrent Fuse: This is a one-time blow fuse with a rated current of 12A.To learn how to safely handle and dispose of the FieldFox battery, refer to theMaterial Safety Data Sheet for the manufacturer of the battery at:http://na.support.keysight.com/fieldfox/help/SupHelp/Reference/MSDS.htmEnvironmental RequirementsRefer to the FieldFox Specifications in “Specifications/Data Sheet” onpage 265.Electrical RequirementsThe FieldFox allows you to use either the lithium-ion battery or the AC/DCadapter - both are included.
