Avoiding Electrostatic Discharge (Esd) Damage - Dell EMC Unity Series Installation Manual

Avoiding electrostatic discharge (ESD) damage

Table 1 Hardware acclimation times (systems and components) (continued)
If the last 24 hours of the
TRANSIT/STORAGE
environment was this:
Cold <68°F Dry <30%
(20°C) RH
Cold <68°F Damp ≥30%
(20°C) RH
Hot >72°F Dry <30%
(22°C) RH
Hot >72°F Humid
(22°C) 30-45% RH
Humid
45-60% RH
Humid
≥60% RH
Unknown
NOTICE
If there are signs of condensation after the recommended acclimation time has
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passed, allow an additional eight (8) hours to stabilize.
Systems and components must not experience changes in temperature and
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humidity that are likely to cause condensation to form on or in that system or
component. Do not exceed the shipping and storage temperature gradient of
45°F/hr (25°C/hr).
Do NOT apply power to the system for at least the number of hours specified in
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Table 1 on page 10. If the last 24 hours of the transit/storage environment is
unknown, then you must allow the system or component 16 hours to stabilize in
the new environment.
When replacing or installing hardware units, you can inadvertently damage the
sensitive electronic circuits in the equipment by simply touching them. Electrostatic
charge that has accumulated on your body discharges through the circuits. If the air in
the work area is very dry, running a humidifier in the work area will help decrease the
risk of ESD damage. Follow the procedures below to prevent damage to the
equipment.
Be aware of the following requirements:
Provide enough room to work on the equipment.
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...and the OPERATING
environment is this:
<86°F (30°C)
<86°F (30°C)
<86°F (30°C)
<86°F (30°C)
<86°F (30°C)
<86°F (30°C)
<86°F (30°C)

Avoiding electrostatic discharge (ESD) damage

Prepare your system
...then let the system
or component
acclimate in the new
environment this many
hours:
4 hours
4 hours
4 hours
4 hours
8 hours
16 hours
16 hours
11