@ lllflfl Model Voltage I Hz Light & Healer IEC Cord
Figure 1. High Output Overhead Ionizer
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
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.
Employee Owned
Model Voltage / Hz Light & Heater IEC Cord
60600 120 / 50-60 Yes 7' 6"
ANSI/ESD S20.20 paragraph 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.
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
*Never use incandescent lamps in the 60600 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: Desco.com
Made in the
United States of America
TB-3006 Page 2 of 4
Figure 3 shows multiple mounting positions relative to the
bench top. Mounting may be accomplished by brackets
from shelving, vertical uprights, lights, or with chains hung
from the ceiling. Ensure that air flow is not impeded by the
method used.
After the ionizer has been securely mounted, connect
the power cord to the IEC connector on the back of the
unit and then to a convenient grounded receptacle. It is
recommended that the AC outlet be checked for proper
wiring and grounding, as the ionizer depends on a good
ground for offset voltage balancing.
Set the front panel rocker fan switch to either “HIGH” or
“LOW” speed fan. Higher air flow will result in a faster
neutralization rate.
If the ionizer is used in a manner not specified by the
manufacturer, the protection provided by the ionizer
may be impaired.
“As with all ionizers, periodic maintenance will be needed to
provide optimum performance.” (Reference: IEC 61340-5-
2:1paragraph 5.2.9).
The frequency of monitoring ionizers really depends on how
and where they are used. Since the majority of them use a
fan to transport the ions to the working area, the cleanliness
of the air directly affects their performance over time and
how often the emitters should be cleaned.
ANSI/ESD S20.20 specifies that the compliance
verification of ionizers be tested per ESD TR53. EIA-625
recommends checking ionizers every 6 months, but
this may not be suitable for many programs particularly
since an out-of-balance may exist for months before it
is checked again. ANSI/ESD S20.20 paragraph
Compliance Verification Plan Requirement states: “Test
equipment shall be selected to make measurements of
appropriate properties of the technical requirements that are
incorporated into the ESD program plan.” And paragraph Compliance Verification Plan Guidance states: “In
addition to internal audits, external audits (Organization and
supplier of ESDS items) should be performed to ensure
compliance with planned requirements. Verifications should
include routine checks of the Technical Requirements in the
Plan. The frequency of verification checks should be based
on the control item usage, its durability and associated risk
of failure.”
Air filter
Employee Owned
Figure 3. Mounting alternatives relative to the bench top
Mounting Suggestions
Mounting the ionizer is facilitated by five 1/4"-20 threaded
holes on each end and universal brackets supplied with
the unit. To avoid a potential shock hazard, be sure that
fasteners do not extend more than 1/2" into unit.
Figure 4. 1/4"-20 threaded mounting holes
Filter for Ionizer (Optional)
A filter is available for the High Output Overhead Ionizer.
Overhead ionizers operate more effectively when the air
is free of contaminants. The filter will allow the overhead
ionizer to operate longer between maintenance intervals.
Ensure that ionizer is turned off. Remove grills and install
filters on the ionizer using screws supplied (do not re-install
grills over filters). Replacement filters (Desco item #60455)
are available. For more information on the filter, call our
customer service department at 909-627-8178 (Chino, CA)
or 781-821-8370 (Canton, MA).
Figure 5. Filter for ionizer
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website: Desco.com
L We 6 sec 6 sec 9 sec. >—16"—o— 15"—|—16"—| IONIZER CHARGED PLAYS STAT“: DIssIPATIvE SURFACE
TB-3006 Page 3 of 4
Under normal conditions the ionizer will attract dirt and dust
(especially on the emitter and fan guards). To maintain
optimum performance, cleaning must be done on a regular
basis. The emitter pins should be cleaned at least every 6
months. However, more frequent cleaning may be required
if used in environments with more contaminants.
Theory of Operation
By definition, materials that are insulators cannot have
static charges removed via grounding as they do not
conduct electricity. Ionizer emitters flood an area with
millions of positive and negative charged ions to neutralize
statically charged insulators.
Desco overhead ionizers employ a safe non-nuclear
Steady-State DC ionization source. Steady DC systems
consist of separate negative and positive ion emitters
connected by a pair of high-voltage cables to their
respective high-voltage power supplies. The ionizer’s
unique, closed loop monitoring circuitry monitors ion output
and automatically adjusts the unit to reach an equilibrium
at perfectly balanced ion flow. The ionizer is designed to
achieve balance under extreme conditions and is uniquely
able to maintain balance in almost any environment. Desco
ionizers meet the ANSI/ESD S20.20 less than ±50 volts
required limits offset voltage tested in accordance with
ANSI ESD S3.1. High Output Overhead Ionizers greatly
exceed the requirement providing ±15 volt auto balancing.
The unit’s circuitry also features a visual alarm, which alerts
the user of malfunction conditions caused by excessive
electrode contamination or the failure of either the
positive or negative power supply. When the High Output
Overhead Ionizer is ON and its output is balanced, the
blue LED indicator on the front of the unit will be steadily
lit. If a malfunction condition is detected the balance
circuit will cause the blue LED to flash until the problem is
corrected. See the maintenance section for recommended
maintenance procedures.
Employee Owned
Figure 6. Cleaning the emitters and fan guards
Emitter pin cleaning is very simple and should be
done frequently. TURN THE IONIZER OFF. Blow off
contaminants on the emitter assemblies and fan guards with
clean dry air.
If the ionizer does not return to proper balance, then you
may need to clean each emitter point more thoroughly.
CORD. With a non-linting swab or small brush dipped in
isopropyl alcohol wipe each emitter needle thoroughly.
Brush off emitters to assure that stray filaments of cleaning
material are completely removed. A soft cloth and alcohol
may be used to clean each fan guard.
Emitter Needle Replacement
The tri-metallic emitters should not require replacement
unless broken or damaged. Contact Desco if replacement is
Light Bulb Replacement
The High Output Overhead Ionizer features two fluorescent
light bulbs. They can be accessed and replaced by
removing the two covers located at the top of the ionizer.
The light bulbs should only be replaced by the same
compact fluorescent bulbs, 15 W max. NOTE: Never use
incandescent lamps in the High Output Overhead Ionizer.
Neutralization Efficiency (Discharge Times)
The comparative efficiency of overhead top ionizers is
determined by a standard test published by the ESD
Association Standard ANSI/ESD S3.1. The typical discharge
times measured using this standard for the ionizer are
shown in the following diagram. The performance of the
ionizer was measured with the unit positioned at varying
distances with the fan speed on high and without a filter.
Figure 7. Discharge times in seconds from ±1000 volts to
±100 volts on a 6" x 6" charged plate per ANSI/ESD S3.1
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website: Desco.com
TB-3006 Page 4 of 4
The High Output Overhead Ionizer’s quiet and gentle fan
is designed so that it will not disturb personnel, paperwork,
or delicate parts. The LED indicator mounted on the face of
the unit allows the operator to easily verify whether it is ON,
OFF, or in need of maintenance. The ionizer’s emitter pin
material will not require replacement during the normal life
of the product.
The High Output Overhead Ionizer is engineered for
efficiency and durability. The unit’s automatic feedback
balancing circuitry eliminates the need for repeated
calibration, making this ionizer highly dependable and cost
Input: 120 VAC - 50/60 Hz, 6A
Ozone: Less than 0.05 ppm
Airflow: 150-260CFM adjustable
Dimensions: 40"L x 5-1/4"W x 2-3/4"H
Weight: 9.70 lbs
Cord: 7'6" cord set with IEC connector
Mounting: Five each 1/4"-20 threaded holes on
each end
Testing and Calibration
We recommend at least annual calibration of our ionizers.
Ionizers are tested and calibrated using a charged plate
analyzer or an ionization test kit (ANSI/ESD SP33). ANSI/
ESD S20.20 specifies that the compliance verification
of ionizers be tested per ESD TR53. Standards may be
obtained from the ESD Association, 7902 Turin Road,
Suite 4, Rome, NY 13440-2069, (315) 339-6937. Desco
will be happy to send you information on our model 19497
Ionization Test Kit.
The High Output Overhead Ionizer is calibrated to NIST
traceable standards. Contact our Customer Service
Department for details.
For Audio On/Off and Alarm and Balance Adjustment see
Figure 8.
Calibration Access Hole
(Make adjustments
Audio On/Off
Alarm Adjustment
Balance Adjustment
Employee Owned
Desco expressly warrants that for a period of one (1) year from the
date of purchase, Desco Overhead Ionizers will be free of defects
in material (parts) and workmanship (labor). Within the warranty
period, a unit will be tested, repaired or replaced at Desco’s
option, free of charge. Call Customer Service at 909-627-8178
(Chino, CA) or 781-821-8370 (Canton, MA) for Return Material
Authorization (RMA) and proper shipping instructions and address.
You should include a copy of your original packing slip, invoice, or
other proof of pur chase date. Any unit under warranty should be
shipped prepaid to the Desco factory. Warranty repairs will take
approximately two weeks.
If your unit is out of warranty, Desco will quote repair charges
necessary to bring your unit to factory standards. Call Customer
Service at 909-627-8178 (Chino, CA) or 781-821-8370 (Canton,
MA) for Return Material Authorization (RMA) and proper shipping
instructions and address. Ship your unit freight prepaid.
Warranty Exclusions
DISCLAIMED. The express warranty will not apply to defects or
damage due to accidents, neglect, misuse, alterations, operator
error, or failure to properly maintain, clean or repair products.
Limit of Liability
Electronic ionizers use high voltage corona discharge and should
not be used in or near flammable or explosive environments. In
no event will Desco or any seller be responsible or liable for any
injury, loss or damage, direct or consequential, arising out of the
use of or the inability to use the product. Before using, users
shall deter mine the suitability of the product for their intended use,
and users assume all risk and liability whatsoever in connection
Figure 8. Audio On/Off and Alarm and Balance Adjustment
of High Output Overhead Ionizer.
There are no known health risks associated with our
devices. The emitters work at about 4-6 kV and can create
ozone, but there have been no significant measurement
of ozone from our emitter sets, as all our existing units
test well below the OSHA limit of 0.05 ppm ozone. For
additional safety information, see “Dispelling an Old Myth”
written by William Metz of Hewlett-Packard published in
Evaluation Engineering magazine, September 2001.Limited
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website: Desco.com

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