ESD Basic Training
ZTEC Instruments, Inc.
I. ESD General Information
• About ESD
• Instrument Damage
II. ESD Guidelines
• ESD sensitive devices
• Basic Rules
What is Electrostatic
• Electrostatic Discharge, also called ESD,
is the rapid, spontaneous transfer of
electric charge between two objects.
Examples of Static Generators
• Unrolling adhesive tape
• Walking across carpet
• Petting a cat
• Drying clothes without using dryer sheets
Examples of Electrostatic
• A zap felt on a doorknob after walking
across a carpet
General ESD Info
ESD you can’t feel: 0 to 2kV
ESD you might feel: 2kV to 4kV
ESD you can probably feel and see as
spark : 4kV to 16kV
• However, AS LITTLE AS 3 VOLTS COULD
Types of Damage
• Latent Failure - A component may be wounded but
passes inspection. Example: A ZTEC Instrument may pass
manufacturing tests but fail in the field.
• Catastrophic Failure - ESD damage is detected during
Costs of Damage
• Latent Failure cause more returns, more warranty
costs, and lower customer satisfaction.
• Improper ESD precautions decreases productivity.
ESD Sensitive Devices
Examples of ESD Sensitive Devices:
• Printed Circuit Boards
As electronic devices become smaller
and more precise, they become
more sensitive and susceptible to
ESD damage. All ZTEC products
are highly ESD sensitive!!!
ESD signs and symbols
• The ESD Susceptibility Symbol consists of a
triangle, a reaching hand, and a slash through the
reaching hand. The triangle means "caution" and
the slash through the reaching hand means "Don't
• The ESD Protective Symbol (Figure 4) consists of
the reaching hand in the triangle. An arc around
the triangle replaces the slash. This "umbrella"
means protection. The symbol indicates ESD
Products that help control ESD
• ESD dissipative smocks and gloves
• ESD dissipative paper
• Dissipative binders & document protectors
• Antistatic tape
• ESD shielded bags
• Conductive totes and boxes
• Conductive & dissipative flooring
• ESD dissipative chairs and chair coverings
Basic Rules for entering an
ESD sensitive area:
• Only trained people allowed in ESD Protected Area.
• All visitors and untrained personnel must be escorted.
• Always wear an ESD dissipative smock, buttoned up all
the way, BEFORE entering the lab area.
• Practice the “3 foot rule”. Always be grounded if you are
within 3 feet of any ESD sensitive item.
• Do not bring unnecessary insulators (objects which can
hold electrostatic charge, such as paper, plastic, and
Styrofoam) into the lab.
Wrist Straps and Grounding
• Wrist straps should be worn snugly with
the metal plate against the skin.
• Test wrist straps daily.
• Shake wrist strap while testing to check for
When working in an ESD Sensitive Area:
• Plug in wrist strap to a proper ground point, prior to handling
any ESD sensitive product.
• Store ESD sensitive items in ESD shielded bags or boxes.
• Never leave out any ESD sensitive items on workbenches.
• Keep ESD sensitive areas free of unnecessary insulators.
Container ESD Shielded bag