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Difficulty: MediumSafety Procedures and Environmental Controls

An IT technician is auditing environmental controls in a newly constructed server room. System monitoring reports show that the room's relative humidity has fallen to 12%, and technicians report receiving minor static shocks when touching server rack frames. Which of the following environmental adjustments is the most effective long-term control to mitigate ESD risks while protecting active hardware?

  1. Adjust the HVAC environmental controls to maintain relative humidity levels between 40% and 55%.Answer
  2. B
    Decrease ambient server room temperature to 10°C (50°F) to neutralize static charge accumulation.
  3. C
    Position high-velocity cooling fans directly in front of open rack enclosures to disperse electrostatic fields.
  4. D
    Apply a liquid anti-static spray treatment directly onto active network switch faceplates and server enclosures.

Answer

Adjusting the HVAC system to maintain a relative humidity between 40% and 55% is the standard environmental control to minimize electrostatic discharge (ESD) accumulation while avoiding moisture condensation.
Relative humidity controls static electricity in environment-controlled IT spaces. Raising dry air humidity levels to the recommended 40%-55% range allows static charges to dissipate harmlessly through microscopic air moisture, mitigating ESD events before technicians handle equipment.

Step-by-Step Solution

1
Analyze the environmental symptom and reported hazard.
Relative humidity of 12% is excessively low, creating ideal dry air conditions for static charge buildup on surfaces and human body capacitance.
Air with low moisture content acts as an electrical insulator, preventing static charges from harmlessly dissipating into the surrounding atmosphere.
2
Evaluate standard environmental controls for data centers and server rooms.
Industry standards (such as ASHRAE guidelines) recommend maintaining relative humidity around 40% to 55%.
This target range provides enough humidity to safely bleed off static charges while remaining safely below condensation thresholds that could damage high-density circuitry.

Key Concept

Environmental Controls and Relative Humidity for ESD Prevention
Estimated Time:1m 15s
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Topics

Safety Procedures and Environmental Controls

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