Installation Manual
iSiteC BTS3601C CDMA Base Station
Safety Precautions
S-7
3.6 Static Electricity
Caution:
Static electricity generated by the human body may damage the electrostatic-sensitive parts on the
circuit boards, such as large-scale integrated circuit (IC).
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The grating generated betwe en human activities and the components is the
rootage for electrostatic charge accumulation. In dry climate, the electrostatic
charge carried by human body may go up to 30 kV, which will remain on the
human body for a rather long period of time. The operator’s contact with the
sensitive component and the resultant electric discharge will cause damage to
the component.
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Before contacting/touching any equipment such as holding plug-in boards, circuit
boards and IC chips, put on the anti-static wrist strap with one end well grounded
so as to prevent sensitive parts from getting damaged by static electricity on the
human body.
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Before operators touch the board or module, they should release the
electrostatic charge in their body. That is, before the operator touches a board or
a module, he or she must wear the anti-static grounded wrist strap. The
connecting line between the wrist and the grounding point should connect in
series with a resistance greater than 1 M¦¸ to protect people from being
accidentally shocked. The resistance value greater than 1 M, is rather low in
terms of electrostatic voltage discharging. The anti-static wrist strap should be
checked regularly. Using other cable to replace the cable of anti-static wrist strap
is strictly prohibited.
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Electrostatic-sensitive board or module should not be in contact with the object
with static electricity or the object that may easily generate static electricity. For
instance, packaging bags, delivery boxes and conveyor belts made of insulating
materials will generate static electricity by themselves, and can cause
electrostatic charging when in contact with human body or the earth and might
thus bring forth damages.
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Electrostatic-sensitive boards or modules can only contact quality discharging
materials, such as anti-static packing bags. The board in stock or in the course
of transportation should be packaged with anti-static packing bag.
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Before the measurement device is connected to boards or modules, first
discharge its static electricity, that is, the measurement device should be
grounded first.
