TECHNICAL BULLETIN TB-6590
Mini Zero Volt Ionizer 2
Installation, Operation and Maintenance
Made in the
United States of America
“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 Introduction and Purpose / General
Information)
Figure 1. EMIT 50642 Mini Zero Volt Ionizer 2
The EMIT Mini Zero Volt Ionizer 2 operates on Steady-State
DC. Steady-State 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. DC
power is constantly applied to the emitter points. The ionizer
utilizes feedback from the internal sensor grill to continuously
adjust the output to maintain balance.
EMIT offers the following accessories for the Mini Zero Volt
Ionizer 2:
Item
50658
50668
19263
1
1
1
1
1
Description
Emitter Pin Cleaner, 20 Pack
Replacement Emitter Pins, 8 Pack
Power Adapter, 24VDC Output
Description
The EMIT 50642 Mini Zero Volt Ionizer (ZVI) 2 is a compact
bench top ionizer used for neutralizing electrostatic charges
on insulators and ungrounded conductors in a 6" x 24"
coverage area. Its compact size (5.3" high x 3.5" wide x
1.7" deep with stand) allows it to be used in confined spaces
such as environmental chambers and automated equipment.
It may also be used at standard ESD workstations. Its fast
discharge times (< 3 seconds at 12") and ±5 Volt offset
voltage exceed the required limits of ANSI/ESD S20.20 and
ESD TR53. Steady-State DC emitters are spaced farther
apart to prevent ion recombination, increase decay efficiency
and provide a broader coverage area of ionization. The
Mini ZVI 2’s two-speed fan (33 CFM to 51 CFM) produces
consistent performance at both the low and high speeds.
Low airflow may be used when working with small parts and
components that may move with higher airflow. The Mini ZVI
2 features a stainless steel enclosure and multi-mount stand
to minimize contamination and corrosion when used in clean
or sensitive areas.
Ionizers are useful in preventing electrostatic charge
generation, electrostatic discharge, electrostatic attraction,
as well as preventing equipment latch-up. Per ANSI/ESD
S20.20 section 6.2.3.1. Protected Areas Requirement states:
“Ionization or other charge mitigating techniques shall be
used at the workstation to neutralize electrostatic fields
on all process essential insulators if the electrostatic field
is considered a threat.” “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 an electrostatic charge is present
on objects in the work environment, it will be neutralized
by attracting opposite polarity charges from the ionized
air. Note that ionization systems should not be used as a
primary means of charge control on conductors or people.”
(Reference: EN 61340-5-2:1 clause 5.2.9)
Packaging
Mini Zero Volt Ionizer 2
Power Adapter, 24VDC, with interchangeable plugs
(North America, UK/Asia, Europe)
Ground Cord
Emitter Pin Cleaner Pack
Certificate of Calibration
Figure 2. Interchangeable power adapter plugs included
with the Mini Zero Volt Ionizer 2
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6590
Page 1 of 5
July 2018
© 2018 DESCO INDUSTRIES INC
Employee Owned
Features and Components
3. Connect the power adapter to the ionizer to turn it on.
When the unit is first turned on, it conducts a self-test.
The audible alarm will sound, and the status LED will
cycle through orange and green. The LED will remain
green during normal operation.
A
B
C
D
Figure 3. Mini Zero Volt Ionizer 2 features and
components
A. Ground Jack:
Insert the banana plug end of the included
ground cord to this jack. Connect the ring terminal end of the
cord to equipment ground.
B. 24VDC Power Jack:
Connect the power adapter here to
power the Mini ZVI 2.
C. Fan Speed Switch:
Slide the switch down to set the fan
speed to LOW. Slide the switch up to set the fan speed to
HIGH.
D. Balance Adjustment Potentiometer:
Turn the
potentiometer clockwise for positive adjustment. Turn the
potentiometer counter-clockwise for negative adjustment.
E. Status LED:
The LED will illuminate green when the
ionizer runs normally. It will illuminate orange and sound
the buzzer should the ionizer experience circuit failure or its
emitter pins become too dirty to operate effectively.
Figure 4. Using the Mini Zero Volt Ionizer 2 at a
workstation.
E
Installation
Place the unit at a desired location where that the airflow
will not be restricted. The Mini ZVI 2’s compact size and
mountable stand allow it to be installed in confined spaces
such as enviornment chambers and automated machinery.
Connect the ground cord to the ionizer’s ground jack. Attach
the ring terminal end of the ground cord to a ground point.
The face plate screw of a grounded AC wall outlet may
provide a convenient connection point.
Operation
1. Set the fan speed switch to the LOW or HIGH position.
Higher airflow will result in faster neutralization rates.
2. Position the ionizer so that maximum airflow is directed
towards the items or area to be neutralized.
Figure 5. Using the Mini Zero Volt Ionizer 2 inside
automated machinery.
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6590
Page 2 of 5
© 2018 DESCO INDUSTRIES INC
Employee Owned
Maintenance
CLEANING THE EMITTER POINTS
Under normal conditions, the ionizer will attract dirt and dust
(especially on the emitter points). To maintain optimum
neutralization efficiency and operation, cleaning should be
performed on a regular basis.
In the event of circuit failure or dirty emitter pins, the
Mini Zero Volt Ionizer 2 will alarm and its status LED will
illuminate orange.
The emitter points should be cleaned using the included
50658 Emitter Point Cleaners or a swab dampened with
Isopropyl alcohol.
1.
Turn the unit OFF by disconnecting its power
adapter.
2. Remove the rear screen by removing the 4 screws.
3. Clean the emitter points using the included 50658
Emitter Point Cleaners or a swab dampened with
Isopropyl alcohol
4. Reattach the rear screen.
5. Reconnect the power adapter to turn on the ionizer.
6. Verify the performance of the ionizer by using a charged
plate monitor or ionization test kit.
The emitter points should not require replacement during
the life of the unit with normal handling. If necessary, item
50668 Replacement Emitter Points are available for order.
Adjustments and Compliance Verification
BALANCE OFFSET VOLTAGE ADJUSTMENT
The Mini Zero Volt Ionizer 2 is an auto-balancing unit.
However, tuning or manual adjustment can be accomplished
by turning the balance adjustment potentiometer located at
the left-side of the unit. To increase the output in a positive
direction, turn the potentiometer clockwise. To increase
the output in a negative direction, turn the potentiometer
counter-clockwise.
Compliance Verification should be per ESD TR53. Offset
voltage (balance) and both polarity’s discharge time should
be checked on every ionizer periodically using an Ionization
Test Kit or a Charged Plate Analyzer. Clean the emitter
points (with electrical power off), adjust offset voltage
(balance) to zero and then re-test for offset voltage (balance)
and discharge times recording the measurements.
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6590
Page 3 of 5
© 2018 DESCO INDUSTRIES INC
Employee Owned
Neutralization (Discharge) Times
All data was taken with the fan speed set to high. All time measurements are in seconds.
NOTE: Discharge times in seconds are representative only and are not a guarantee. Discharge times are actual
measurements recorded in a factory ambient environment.
Per ANSI/ESD S20.20, the test method for Product Qualification test is ANSI/ESD STM3.1, and for Compliance Verification
is ESD TR53 which advises “Measurements should be made at the location where ESD sensitive items are to be ionized.”
A larger area may require additional ionizers. Per S20.20 the required limit for ionizer discharge time is user defined. Use
Table to determine the number of ionizers to achieve ionization of area to be neutralized to meet your company’s ESD control
plan specified discharge times.
The comparative efficiency of bench top ionizers is determined by a standard test published by the ESD Association: ANSI/
ESD STM 3.1. Typical positive and negative decay times (1000V - 100V) measured using this standard are shown in Figure
5. The performance of the ionizer was measured with the unit positioned as shown, with the fan speed on high and without a
filter.
12"
12"
12"
TP1
Charged Plate
+35.3
-32.1
TP4
+15.1
-23.0
TP7
+14.0
-20.9
Air Flow
TP2
+1.6
-2.3
Optimal
Coverage
Area
TP5
+2.9
-4.4
TP8
+4.8
-7.4
12"
Mini Zero
Volt Ionizer
TP3
+48.2
-60.7
TP6
+14.2
-25.3
TP9
+14.0
-17.3
12"
Figure 6. Neutralization (Discharge) Times
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6590
Page 4 of 5
© 2018 DESCO INDUSTRIES INC
Employee Owned
Specifications
Air Flow
Two speed fan (33 CFM, 51 CFM)
Balance (offset voltage) at 12" in front of Ionizer
±5 Volts Typical
±25 Volts Maximum
(Temperature Range: 65°F to 80°F, RH: 15% to 65%)
Chassis
Stainless steel housing and stand
Dimensions (with stand)
5.3" x 3.5" x 1.7"
(14 cm x 9 cm x 4 cm)
Emitter Points
.050" base diameter
Made of pure tungsten
High Voltage Power Supply
5.5kV DC nominal
Input Power
24 VDC, center positive, 2.5 x 5.5 mm power jack
Ion Emission
Steady-state DC with sense feedback
Mounting
Bench top tilt adjust frame
Ozone
< 0.05 ppm
Weight
1.1 lbs (0.5 kg)
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See the EMIT Warranty -
DescoEMIT.com/Warranty.aspx
EMIT
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Website:
DescoEMIT.com
TB-6590
Page 5 of 5
© 2018 DESCO INDUSTRIES INC
Employee Owned
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