570                                                                                                                     Keysight N9927-90001 User’s Guide
Safety Considerations
For the AC/DC Adapter
For the AC/DC Adapter
Use only the designated AC/DC adapter supplied with the 
instrument.
Use only the designated power cord supplied with the AC/DC 
adapter.
Operated at an ambient temperature: 0 to 40°C; full power rating; derate 
linearly at a rate of 3 watts per degree C, from 90W at 40°C to 45W at 
55°C, 30W at –20°C.
Maximum output rating: +15V/6.0 A. 
Input rating: AC 100–240 V, 50/60Hz
To prevent electrical shock, disconnect the AC to DC adapter from 
the mains before cleaning. Use a dry cloth or one slightly dampened 
with water to clean the external case parts. Do not attempt to clean 
internally.
When the FieldFox is connected to the AC/DC adapter, position the 
adapter so the power cord is readily accessible. The power cord is 
the disconnecting device. It removes main power to the AC/DC 
adapter. The FieldFox front panel switch is only for the DC power 
within the instrument, and not for the AC/DC adapter. Alternately, 
an AC switch or circuit breaker (which is readily identifiable and is 
easily reached by the operator) may be installed and used as a 
disconnecting device to remove mains power from the AC/DC 
adapter.
To avoid overheating, always disconnect the FieldFox from the 
AC/DC adapter before storing the FieldFox in the backpack.
If you prefer to leave the FieldFox connected to the AC/DC adapter 
while inside the backpack, you can disconnect the AC/DC adapter 
from its AC power source to prevent overheating.
The AC/DC adapter has an auto–ranging line voltage input – be sure the 
supply voltage is within the specified range.
The AC/DC adapter is for indoor use only.
Never use a modified or damaged charger. Use the original AC–DC 
adapter ONLY.
The AC/DC adapter is designed for use in Installation Category II and 
Pollution Degree 2 per IEC 61010-1.