distance of 30 cm (12 inches); or B) Use ionization or other
charge mitigating techniques to neutralize the charge.”
(ANSI/ESD S20.20-2007 section 8.3)
“The primary method of static charge control is direct
connection to ground for conductors, static dissipative
materials, and personnel. A complete static control
program must also deal with isolated conductors that cannot
be grounded, insulating materials (e.g., most common
plastics), and moving personnel who cannot use wrist or
heel straps or ESD control flooring and footwear.
Air ionization is not a replacement for grounding methods.
It is one component of a complete static control program.
Ionizers are used when it is not possible to properly
ground everything and as backup to other static control
methods. In clean rooms, air ionization may be one of the
few methods of static control available.” (ESD Handbook
ESD TR20.20 Ionization, section 5.3.6.1)
“All ionization devices will require periodic maintenance for
proper operation. Maintenance intervals for ionizers vary
widely depending on the type of ionization equipment and
use environment. Critical clean room uses will generally
require more frequent attention. It is important to set-up
a routine schedule for ionizer service. Routine service is
typically required to meet quality audit requirements.” (ESD
Handbook ESD TR20.20 section 5.3.6.7 Maintenance /
Cleaning)
Packaging
1 Chargebuster Overhead Ionizer
1 Hanging Kit
1 Power Cord
3 Emitter Point Cleaners
1 Certificate of Calibration
Installation
Input voltage is selected with the two internal jumpers on
JH1. For 110 volt jumper setting, a jumper must be in place
shorting pin 1 to 2 and another shorting pin 3 to 4 (see
Figure 3). For 220 volt jumper setting, a single jumper must
be in place shorting pin 2 to 3 only (see figure 4). Make
sure setting is correct before applying power.
Note:
Unit shipped set at 110V
Before installing the unit, verify that the AC outlet is properly
connected to ground. The unit must have a good ground
to maintain proper offset voltage balance. Install the unit in
the desired location, making sure that the airflow will not be
restricted. Be sure the “OFF / ON” switch located on the
rear of the unit is in the OFF position. Plug the power cord
into the unit and then into the appropriate AC power source.
TB-3031
May 2010 Page 1 of 4
Figure 2. Desco
Chargebuster Overhead Ionizer
Description
The Chargebuster
®
overhead ionizers are steady state DC
ionizers designed to cover 2 foot by 5 foot (
) or 2
foot by 4 foot (
) for use in ESD sensitive work areas:
calibration, test, final assembly, or repair procedures. The
specially designed 3-speed fan modules create better
coverage, consistent offset voltage (±10 Volts), and superior
discharge times(<3 seconds) tested per ANSI/ESD STM
3.1. The Chargebuster
®
overhead ionizers are equipped
with a Auto-Feedback system, that continually optimizes the
performance and will automatically shut down the and alarm
if/when supply voltage drops to the ionizer. The ionizers
can be used with 110V or 220V power sources.
“Necessary non-conductors in the environment cannot
lose their electrostatic charge by attachment to ground.
Ionization systems provide neutralization of charges on
these necessary non-conductive items (circuit board
materials and some device packages are examples of
necessary non-conductors). Assessment of the ESD
hazard created by electrostatic charges on the necessary
nonconductors in the work place is required to ensure
that appropriate actions are implemented, commensurate
with risk to ESDS [ESD sensitive] items”. (ANSI/ESD
S20.20-2007 Foreword)
“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
TECHNICAL BULLETIN TB-3031
Made in America
© 2010 DESCO INDUSTRIES INC.
Employee Owned
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site:
Figure 1. Desco
Chargebuster Overhead Ionizer
Chargebuster
®
Overhead Ionizer
Operation, Installation, and Maintenance
