Preventing Electrostatic Damage To Equipment; Personal Grounding Methods And Equipment - HP ProDesk 400 G4 Maintenance And Service Manual

Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of
sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric
components and accessories.
● To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
● Protect all electrostatic-sensitive parts and assemblies with conductive or approved containers
or packaging.
Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.
●
● Place items on a grounded surface before removing them from their containers.
Always be properly grounded when touching a sensitive component or assembly.
●
● Avoid contact with pins, leads, or circuitry.
Place reusable electrostatic-sensitive parts from assemblies in protective packaging or
●
conductive foam.

Personal grounding methods and equipment

Use the following equipment to prevent static electricity damage to equipment:
● Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords.
To provide proper ground, a strap must be worn snugly against bare skin. The ground cord must be
connected to the banana plug connector on the grounding mat or workstation and fit snugly into it.
● Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible with
most types of shoes or boots. On conductive floors or dissipative floor mats, use them on both feet with
a maximum of one-megohm ± 10% resistance between the operator and ground.
Static Shielding Protection Levels
Method
Antistatic plastic
Carbon-loaded plastic
Metallized laminate
Voltage
1,500
7,500
15,000
Electrostatic discharge information 15