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Static Solutions Inc.
Static Solutions Inc. - Ohm - Stat RT - 1000 Information
22
ANSI/ESD-S20.20-1999
a Compliance Verification Plan that identifies the
requirements to be verified, and the frequency at
which those verifications must occur. Test
equipment shall be selected to make measurements
of appropriate properties of the technical
requirements that are incorporated into the ESD
program plan.
6.1.3.2. Compliance Verification Plan Guidance
In addition to internal audits, external audits
(Organization and supplier of ESDS items) should
be performed to ensure compliance with planned
requirements. Verifications should include routine
checks of the Technical Requirements in the Plan.
The frequency of verification checks should be
based on the control item usage, its durability and
associated risk of failure
.
6.2. ESD CONTROL PROGRAM PLAN
TECHNICAL REQUIREMENTS
Table 1 identifies and describes key Technical
Requirements used in the development of a
Program and Plan. Note that for each Technical
Requirement there are required or optional
implementing processes or methods (shown with an
“R” or “O” in Table 1) from which to fulfill each
Technical Requirement. In a case where there is a
required implementing process or method within the
Technical Requirements, the implementing process
or method shall be used. If there are additional
optional elements, they may or may not be
implemented in the Plan. If a Technical
Requirement only contains optional elements,
(shown with an
“O”) then at least one of the options
must be implemented by the Plan. The Plan shall
include test methods, acceptance limits and periodic
testing intervals. Area 1 shown on Table 1 is
intended to designate permanent ESD controlled
areas such as manufacturing, production or
distribution facilities. Area 2 shown on Table 1 is
intended to designate temporary ESD controlled
areas such as field service or other remote locations
that are not normally equipped as a Protected Area.
Test methods used by the organization that differ
from the test method or reference in Table 1 shall be
documented. Additional guidance may be obtained
in ESD ADV 2.0 ESD Association Advisory for the
Protection of Electrostatic Discharge Susceptible
Items
– Handbook
6.2.1. Grounding / Bonding Systems
6.2.1.1. Grounding / Bonding Systems
Requirements
electrical potential. As a minimum, ESDS items,
personnel and other related conductors shall be
bonded or electrically interconnected.
6.2.1.2. Grounding / Bonding Systems Guidance
In most cases, the third wire (green) AC equipment
ground is the preferred choice for ground
4
. When
the third wire AC equipment ground is not available
or impractical to use, personnel should be bonded or
electrically connected to a conductive element of the
ESDS item using a wrist strap or other grounding
system to ensure that all elements are at the same
electrical potential.
6.2.2. Personnel Grounding
6.2.2.1. Personnel Grounding Requirements
All personnel shall be bonded or electrically
connected to ground or contrived ground when
handling ESD sensitive items. When personnel are
seated at ESD protective workstations, they shall be
connected to the common point ground via a wrist
strap system.
NOTE: The Organization must be aware of
local safety laws and/or codes when
grounding personnel while working with
energized equipment.
6.2.2.2 Personnel Grounding Guidance
The personnel grounding system in all cases
includes the person, the control item(s) and
connection to ground. A log should be maintained
which verifies that personnel have tested their
personal grounding devices. Personnel should
check constant monitoring devices (when used) to
ensure that they are functional and operating before
ESDS products are handled. In addition, constant
monitoring devices should be functionally checked
periodically to ensure that they are operating as
designed. ESD protective flooring, used with
approved footwear, may be used as an alternative to
the wrist strap system for standing operations.
Footwear includes foot grounders, shoes or booties.
When equipment ground or auxiliary ground
systems are not available, bonding or electrical
connections (contrived ground) may be used.
6.2.3. Protected Areas
6.2.3.1. Protected Areas Requirement
Handling of ESDS parts, assemblies and equipment
without ESD protective covering or packaging shall
be performed in a Protected Area. Caution signs
indicating the existence of the Protected Area shall
Grounding/Bonding Systems shall be used to ensure
that ESDS items, personnel and any other
conductors (e.g. mobile equipment) are at the same
4
The color of third wire equipment ground can vary
with local, national or international electric codes.