Figure 1. High Output Overhead Ionizer
Description
The Desco 40" High Output Overhead Ionizer is designed to
neutralize electrostatic charges over a large work area. The
unique active feedback and balance circuit automatically
ensures and maintains the unit’s ion offset voltage balance,
despite variations in line voltage, air speed or emitter
electrode condition. The ionizer’s feedback circuit also
gives an audible and visual alarm indication when a circuit
malfunction has been detected. The overhead mounting
design of this ionizer allows it to provide maximum coverage
without consuming valuable work bench space. The need
for maintenance is minimized, while maximum neutralization
efficiency and overall performance is attained.
This overhead ionizer is unique - it comes equipped with
two factory installed lights and three heaters. The lights
are on continuously whenever the ionizer is turned on and
allow for better vision at the workstation. The heaters
are activated by a switch on the face of the ionizer. The
heaters will raise the temperature of the output air to about
10° above ambient. The heaters are only to offset the chill
factor of the moving air. They are not intended to warm the
workstation.
Ionizers are useful in preventing electrostatic charge
generation, ElectroStatic Discharge, ElectroStatic Attraction,
as well as preventing equipment latch-up and safety related
shock. Per ANSI/ESDS20.20-2007 section 8.3 “In order
to mitigate field-induced CDM [Charged Device Model]
damage, the ESD program shall include a plan for the
handling of process-required insulators. If the field exceeds
2,000 volts/inch, steps shall be taken to either: A) Separate
the insulator from the ESD-sensitive device by a distance
of 30 cm (12 inches); or B) Use ionization or other charge
mitigating techniques to neutralize the charge.”
Ionization is used to neutralize charges on process
necessary insulators and isolated semiconductors. Some
examples of process necessary insulators are: the PC
board itself, plastic test stands, plastic housing where
a PCB may be mounted, as well as computer monitor
TB-3006
March 2013 Page 1 of 4
High Output Overhead Ionizer
Installation, Operation and Maintenance
screens and regular cleaning wipes. Examples of floating
or isolated conductors are: loaded PCB mounted in a
stand where the pins are not contacting the dissipative
workstation. Ionization is not effective on items that have
large capacitance, like people and carts; however, ionizers
should be considered as a method for charge neutralization
in cases where grounding cannot be achieved.
“Ionizers should be considered as a method for charge
neutralization in cases where grounding cannot be
achieved.” …“Air ionization can neutralize the static charge
on insulated and isolated objects by producing separate
charges in the molecules of the gases of the surrounding
air. When a static charge is present on objects in the work
environment, it will be neutralized by attracting opposite
polarity charges from the ionized air.” (EN 61340-5-2
paragraph 5.2.9)
This ionizer is NIST calibrated and comes equipped with
universal IEC cord connectors.
© 2013 DESCO INDUSTRIES INC.
Employee Owned
TECHNICAL BULLETIN TB-3006
Model Voltage / Hz
Light & Heater
IEC Cord
120 / 50-60
Yes
7' 6"
IONIZER SELECTION
ANSI/ESD S20.20 paragraph 6.1.1.2. ESD Control Program
Plan Guidance states: “The Plan should include a listing of
the specific type of ESD protective materials and equipment
used in the Program.” When selecting an ionizer life cycle
costs should be considered including: equipment cost,
installation cost, and operation and maintenance cost.
24 IN.
24 IN.
48 IN.
OPTIMUM
PERFORMANCE
ZONE
Figure 2. Area of optimum charge neutralization
The unit provides better coverage without using excessive
bench space. The ionizer’s discharge times (neutralization
efficiency) is optimal at approximately 12" to 24" above the
work surface, and will drop off as the distance from the unit
increases.
*Never use incandescent lamps in the
ionizer.
Contact Desco Customer Service at (909) 627-8178 for
lamp replacement information.
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Made in the
United States of America
