Emerson Process Management ControlWave XFC - Manual (Page 193)

5
ESDS Manual
S14006
4/15/92
CAUTION
Don't place ESD-sensitive components and paperwork in the same bag.
The static caused by sliding the paper into the bag could develop a charge and
damage the component(s).
(9) Include a note, which describes the malfunction, in a separate bag along with each
component being shipped. The repair facility will service the component and
promptly return it to the field.
3. Protecting ESD-Sensitive Components
(1) As stated previously, it is recommended that an electrically-conductive anti-static
field kit be kept on any site where ESD-sensitive components are handled. A
recommended ESD-protective workplace arrangement is shown on page 7. The
anti-static safety kit serves to protect the equipment as well as the worker. As a safety
feature, a resistor (usually of the one-megohm, 1/2-watt, current-limiting type) has
been installed in the molded caps of the wrist strap cord and the ground cord. This
resistor limits current should a worker accidently come in contact with a power
source. Do not remove the molded caps from grounded cords. If a cord is damaged,
replace it immediately.
(2) Be sure to position the work surface so that it does not touch grounded conductive
objects. The protective resistor is there to limit the current which can flow through
the strap. When the work surface touches a grounded conductive object, a short is
created which draws the current flow and defeats the purpose of the current-limiting
resistor.
(3) Check resistivity of wrist strap periodically using a commercially-available system
tester similar to the one shown in the figure below: