Edgetech USBL BROADBAND ACOUSTIC TRACKING SYSTEM, User Hardware Manual, Page: 101 / 102

6-3
6.2.1 Static Discharge
cThe Printed Circuit Boards within the TrackPoint 3 console and many electronic components can be
damaged by ElectroStatic Discharge (ESD). Some devices can be damaged by a potential as low as 30 volts.
PCB should always be stored or shipped in anti-static bags. PCB’s should never be stacked on top of one
another and should always be packed separately.
People are a prime source of device-damaging electrostatic potentials, through activities such as walking
or working at a bench can generate thousands of Volts of static potential. This charge is transmitted to a
person’s conductive perspiration layer, and when a charged person handles a static sensitive device, the
component may be damaged by direct or indirect discharge of the static potential to the device.
NOTE: Typically, people do not feel static discharge until the potential
approaches 3,500 Volts.
CAUTION!
ESD initiates device weakness, causing functionality to degrade the
internal components of the device and reduce life expectancy. Continued
use of weak and degraded parts will cause overall unit failure.
Static Discharge Rules
1. Assume all Solid State Electronic Components are sensitive to ESD damage.
2. Never handle any part of the assembly or electronics without grounding. Whenever handling
assemblies or components, always use appropriate grounding procedure: a wrist strap connected
to ground or a heel-strap with a grounded dissipative floormat.
3. Ensure a static-safe environment whenever transporting, storing, or handling sensitive
components or assemblies.
4. Use static shield bags when transporting Printed Circuit Boards.
When changing Printed Circuit Boards and a grounded dissipative floormat or wrist-strap is unavailable,
at the very least, discharge yourself to the chassis of the unit. Lift Circuit Board out from the chassis and
immediately put it on a conductive surface. Then, grasp the anti-static bag (with PCB inside) and the
chassis. Now, remove the new circuit board from its anti-static bag. Place new PCB directly inside chassis.
Place the used board in the spare anti-static bag for transport and/or storage.