Installation Guide
VAV-01 Controller
NexSys
4
SYMBOLS
This is the symbol for Electro-Static Discharge. Electro-Static
Discharge (ESD) can damage certain electronic devices. ESD
is a transfer of electrostatic charge between bodies at different
electrostatic potentials caused by direct contact or induced by a
electrostatic field. The threshold for feeling an electro-static discharge
is approximately 900 to 1000 volts. The average spark produced by a
static discharge from a human body varies from about 10,000 to
25,000 volts.
ESD can cause damage to integrated circuits (IC). Due to the small
size of these complex devices, the ESD sensitivity has increased so
much that some of these devices can be destroyed or damaged by as
little as 20 volts. ESD damage is easy to induce, hard to detect, and is
expensive to repair. Workers could be subjecting an electronic device
to lethal voltages without being aware. The following is a list of
precautions when handling static sensitive devices.
·
A conductive ground strap should be worn to assure that you are at
ground potential. If a ground strap cannot be used, you should
ground yourself before touching the device and remain in contact
with a grounded metallic object during the entire time while
working with the device.
·
Containers, tools, test equipment, and fixtures that come into
contact with the device should be properly grounded. Grounding
of electrical equipment should be done by a grounded plug, not
through the conductive surface of the grounded workstation.
·
Workers clothing should never make contact with the device and
workers should avoid activities that cause friction in the area of the
workstation (wiping feet, rubbing of hands, etc.).
·
Workers should avoid touching leads or contacts.
This is the symbol for caution and represents possible
equipment damage. When this symbol appears, follow the
succeeding text to prevent possible equipment damage.
This is the symbol for danger and represents possible bodily
injury or threat to life and limb. When this symbol appears,
follow the succeeding text closely for safe operation.
