Huawei USG6000E Series Hardware Manual page 602

HUAWEI USG6000E Series
Hardware Guide
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To protect the USG boards from damage caused by static electricity discharge,
take the following measures:
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Issue 08 (2022-04-20)
Electrostatic sources, such as non-ESD plastic bags, non-ESD foam, and rubber
objects must be kept at least 30 cm away from ESD-sensitive components and
boards.
Ensure that the USG is properly grounded according to the grounding
requirements.
Wear an ESD wrist strap before performing any operations on the USG.
Ensure proper contact between the metal buckle of the ESD wrist strap and
the operator's skin. Ensure that the other end of the ESD wrist strap is already
connected to the ESD jack on the USG, as shown in
wearing ESD gloves is recommended.
Figure A-1 Wearing an ESD wrist strap properly
Ensure that the ESD wrist strap works properly and its resistance ranges from
0.75 Mohm to 10 Mohm. Generally, the service life of an ESD wrist strap is
two years. If the ESD wrist strap resistance does not meet the requirement
within its service life, replace it with a new one.
Avoid contact between the boards and clothes because the ESD wrist strap
cannot protect operators from the static electricity caused by this type of
contact.
Use an anti-static pad when replacing boards or chips. In addition to wearing
the ESD wrist strap, use ESD tweezers and extractors when inserting and
removing boards and chips. Do not touch chips and their pins with bare
hands.
Keep all boards and components in ESD bags until they are to be installed.
Place temporarily demounted boards and components on the anti-static pad
or other effective antistatic materials. Do not use non-ESD materials, such as
foam, plastic bags, and paper bags to wrap or make contact with the boards.
Wear an ESD wrist strap before working on board terminals. Discharge cables
and terminal protection jackets using either contact discharge or air discharge
before connecting them to device terminals.
Copyright © Huawei Technologies Co., Ltd.
A Appendix
Figure A-1. In addition,
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