Keysight Technologies N5244/5B Service Manual page 16

Safety and Regulatory Information
General Safety Considerations
Do not operate the analyzer with the outer cover removed for more than
30 minutes, as this could cause the analyzer to overheat which could
result in costly damage.
Ventilation Requirements: When installing the product in a cabinet, the
convection into and out of the product must not be restricted. The ambient
temperature (outside the cabinet) must be less than the maximum
operating temperature of the instrument by 4 °C for every 100 watts
dissipated in the cabinet. If the total power dissipated in the cabinet is
greater than 800 watts, then forced convection must be used.
The measuring terminals on this instrument are designed to be used with
external signals described in Measurement Category I, but NOT with
external signals described in Categories II, III, and IV. The input of this
instrument cannot be connected to the mains.
1-4 Keysight N5244B/45B Service Guide