148 
Installation
Operating and Storage Environment
A.4 Operating and Storage Environment 
The following summarizes the Agilent 8156A operating 
environment ranges. In order for the attenuator to meet 
specifications, the operating environment must be within these 
limits.
WARNING The Agilent 8156A is not designed for outdoor use. To prevent potential 
fire or shock hazard, do not expose the instrument to rain or other 
excessive moisture.
Temperature 
Protect the instrument from temperature extremes and changes in 
temperature that may cause condensation within it.
The storage and operating temperature for the Agilent 8156A is 
given in the table below.
Table A-1 Temperature 
Humidity 
The operating humidity for the Agilent 8156A is 15% to 95% from 
0
°C to 40°C.
Instrument Positioning and Cooling 
The attenuator has a cooling fan mounted internally. Mount or 
position the instrument upright and horizontally so that air can 
circulate through it freely. When operating the attenuator, choose a 
location that provides at least 75mm (3inches) of clearance at the 
Operating Range  Storage Range 
Specified 0
°C to 55°C-40°C to 70°C
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