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ESD Warning Information
Warning 1
– ESD sensitivity
The 421B3X Series Differential Charge Amplifier should be opened by PCB factory-qualified
personnel only.
This product is intended for use by qualified personnel who recognize shock hazards
and are familiar with the safety precautions required to avoid injury.
Warning 2
– ESD sensitivity
This equipment is designed with user safety in mind; however, the protection provided by the
equipment may be impaired if the equipment is used in a manner not specified by PCB Piezotronics,
Inc.
Caution 1
– ESD sensitivity
Cables can kill your equipment.
Although 421 series differential charge amplifiers have protection,
they can still be damaged by high level voltage from electrostatic discharge (ESD). Similar to a
capacitor, a cable can hold a charge caused by triboelectric transfer, such as that which occurs in the
following:
Laying on and moving across a rug,
Any movement through air,
The action of rolling out a cable, and/or
Contact with a non-grounded person.
The PCB solution for product safety:
Connect the cables only with the AC power off.
Temporarily "short" the end of the cable before attaching it to any signal input or output.
Caution 2
– ESD sensitivity
ESD considerations should be made prior to performing any internal adjustments on the
equipment.
Any item of electronic equipment is vulnerable to ESD when opened for adjustments.
Internal adjustments should therefore be done ONLY at an ESD-safe work area. Many products have
ESD protection, but the level of protection may be exceeded by extremely high voltage.
