3-6 Installation and Service Guide N5251-90001
PNA Series Microwave Network Analyzer System 
N5251A
System Installation
Site Preparation
Environmental Requirements
Syste
m Heating and Cooling
Install air conditioning and heating, if necessary, to maintain the ambient temperature within the 
appropriate  range  (as  given  in  the  table  above).  Air  conditioning  capacity  must  be  consistent 
with the BTU ratings given in Table 3-3 on page 3-5.
Required Conditions for Accuracy Enhanced Measurement
Accuracy-enhanced (error-corrected) measurements require the ambient temperature of the 
N5251A to be maintained within ± 1 C of the ambient temperature at calibration.
The environmental requirements sho
wn below are characteristic for the system and are 
based on the limitations of the N5227A network analyzer used. 
Table 3-4 Environmental Requirements
Temperature 
Operation
5 C to 40 C (41 F to 104 F)
Storage
-40 C to +65 C (-40 F to +158 F)
Measurement Calibration
20 C to 26 C (68 F to 79 F)
Performance Verification
Temperature must be within 1 C (1.8 F) 
of the temperature at which the 
measurement calibration was performed.
Relative Humidity
Type tested at 95%, +40 C (non-condensing)
Pressure Altitude
Type tested 0 to 4600 meters (~15,000 feet)