Ventilation Requirement; Working Environment - Rigol DHO924 Quick Manual

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equipment. For example, stationary motors with permanent connection to a
fixed installation.
• Measurement category IV is for measurements performed at the source of a
low-voltage installation. Examples are electricity meters and measurements on
primary overcurrent protection devices and ripple control units.

Ventilation Requirement

This instrument uses a fan to force cooling. Please make sure that the air inlet and
outlet areas are free from obstructions and have free air. When using the instrument
in a bench-top or rack setting, provide at least 10 cm clearance beside, above and
behind the instrument for adequate ventilation.
CAUTION
Inadequate ventilation may cause an increase of temperature in the instrument, which
would cause damage to the instrument. So please keep the instrument well ventilated and
inspect the air outlet and the fan regularly.

Working Environment

Temperature
Operating: 0℃ to +50℃
Non-operating: -30℃ to +60℃
Humidity
• Operating:
Below +30℃: ≤90%RH (without condensation)
+30℃ to +40℃: ≤75% RH (without condensation)
+40℃ to +50℃: ≤45%RH (without condensation)
• Non-operating:
Below +60℃: ≤90%RH (without condensation)
WARNING
To avoid short circuit inside the instrument or electric shock, never operate the
instrument in a humid environment.
Altitude
• Operating: below 3 km
• Non-operating: below 15 km
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