SCS 770122 Installation and operating instructions

TB-9116 Page 1 of 5 © 2023 DESCO INDUSTRIES INC
Employee Owned
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: [phone] | West: [phone] • Website: StaticControl.com
Benchtop AC Ionizer
Installation, Operation, and Maintenance
July 2023
Description
The SCS 770122 Benchtop AC Ionizer is used for
neutralizing electrostatic charges on insulators and
ungrounded conductors. Its discharge times (< 2 second
at 12 inches) and ±15 volt offset voltage exceed the
required limits of ANSI/ESD S20.20 and ESD TR53. The
770122 Benchtop AC Ionizer generates AC high voltage
to produce an airflow rich in positive and negative ions.
A built-in automatic emitter point cleaner periodically
brushes away dust and minimizes maintenance.
Membrane switches are located at the top of the ionizer
to control power, fan speed, and emitter cleaning. The
770122 Benchtop AC Ionizer features a powder coated
steel enclosure and stand and a 24 VDC alarm output
terminal.
USER GUIDE TB-9116
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)
“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]
Packaging
1 Benchtop AC Ionizer
1 Ground Wire, 6'
1 Alarm Wire Harness, 1'
1 Power Adapter with interchangeable plugs
(North America, UK/Asia, Europe)
Figure 1. SCS 770122 Benchtop AC Ionizer

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Employee Owned
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: [phone] | West: [phone] • Website: StaticControl.com
A. Display: Displays fan speed setting and emitter
cleaning cycle.
B. Clean Button: Triggers the emitter cleaning cycle.
The fan will stop, and the emitter brushes will rotate
clockwise for 5 seconds and then counterclockwise for
another 5 seconds. The fan will rotate after the cleaning
cycle is completed.
C. Set Button: Toggles the ionizer between fan speed
mode and emitter cleaning timer.
D. Clean Indicator: Illuminates when the emitter
cleaner runs.
E. + and - Buttons: Toggles the fan speed setting and
emitter cleaning timer.
F. H.V. Indicator: Illuminates green when the high
voltage emitters are active and functioning correctly.
Illuminates red when the high voltage is abnormal and
the emitters require cleaning.
G. Power Button: Toggles the power to the ionizer.
H. Fan Indicator: Illuminates green when the fan is
active and functioning correctly. Illuminates red when
the fan behaves abnormally and a foreign object may be
causing its blades to rotate freely.
I. Fan Grill Clips: Pinch both clips to detach the
fan grill from the assembly, so the emitters may be
accessed for hand cleaning or replacement.
J. Alarm Output Terminal: Outputs a 24 VDC signal
whenever an alarm occurs on the ionizer. Use the
included alarm wire harness to wire the circuit to an
external device.
K. Power Jack: Connect the included power adapter to
this jack.
L. Ground Screw: Bonds the ionizer to ground.
Installation
Install the included ground wire to the ground screw at
the back of the ionizer. Connect the opposite end of the
wire to equipment ground. Place the 770122 Benchtop
AC Ionizer at a desired location where the airflow will
not be restricted. Ensure a space of at least 5 inches
(15 cm) at the rear and on both sides of the ionizer to
provide sufficient airflow. Use the tilt lock knobs to aim
the ionizer at the area to be neutralized. Connect the
power adapter into the power jack at the back of the
ionizer and into an appropriate AC power source.
Note that placement of the ionizer is important in
determining its effectiveness. The distance from the
targeted object and fan speed affect the ionizer’s
performance. The discharge time will increase as the
distance increases or fan speed is reduced. The front of
the ionizer must be placed at least 4 inches away from
the items to be neutralized to prevent reverse charging
from occurring.
Features and Components
Figure 2. 770122 Benchtop AC Ionizer features and
components
KL
A
I I
B
C
D
E
G
H
F
J

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Employee Owned
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: [phone] | West: [phone] • Website: StaticControl.com
Operation
1. Position the ionizer so that maximum airflow is
directed towards the items or area to be neutralized.
2. Press the power switch to power the ionizer. The
ionizer will execute a cleaning cycle. The emitter
brushes will rotate clockwise for 5 seconds and then
counterclockwise for another 5 seconds. The fan will
power on after the cleaning cycle is completed.
3. Use the + and - buttons to set the fan speed to the
desired setting. F01 is the lowest fan speed, and
F07 is the highest fan speed. Higher airflow will
result in faster discharge times.
Figure 3. Using the 770122 Benchtop AC Ionizer on a
workbench
Figure 4. Using the 770122 Benchtop AC Ionizer at a
machine station
Emitter Cleaning Timer
Press the Set button. H000 will appear on the display.
000 indicates the number of hours that need to be
elapsed before an automatic cleaning cycle is executed.
The cleaning cycle timer be configured from 001 to 999
hours. Press the Set button to toggle between the digits
and press the + and - buttons to increase and decrease
the values, respectively.
Locking the Control Buttons
To lock the control buttons, press and hold the Set
button for 3 seconds until 3 beeps sound. To unlock
the control buttons, press and hold the Set button for 3
seconds until 3 beeps sound.
Maintenance
Occasional cleaning of the case and of the ionizing
electrodes are the only routine maintenance procedures
required.
Cleaning the Enclosure
Wipe the enclosure with a soft cloth moistened with
water. If a stronger cleaning solution is required, mild
soap with water may be used. The use of any other
cleaning solutions is not recommended.
Cleaning the Emitter Points
CAUTION: Disconnect the power to the ionizer
whenever cleaning the emitter points.
The automated brushes will keep the emitter points
clean by brushing per the hourly cycle set in the emitter
cleaning timer. Particulates on the emitter point may,
however, inhibit ionization to a limited degree. The
emitter points are located behind the front grill. A jet of
clean, compressed air can be used to remove dirt on
emitter points. If a more rigorous cleaning method is
needed to remove particulate, clean the points with a
cotton swab dampened with isopropyl alcohol. Access
to the points is available through the front grill. Squeeze
the two clips at the sides of the fan grill to detach it
from the assembly. Be careful not to damage the points
during cleaning.
Troubleshooting
Fault Tip
Fan does power on
Verify that the power
adapter is properly
connected
Verify that the front grill is
attached properly
Discharge times are
poor
Clean the emitters
H.V. indicator illuminates
red
Verify that no conductors
are nearby the emitters
FAN indicator illuminates
red
Verify that nothing is
obstructing the fan blades

TB-9116 Page 4 of 5 © 2023 DESCO INDUSTRIES INC
Employee Owned
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: [phone] | West: [phone] • Website: StaticControl.com
Calibration
The SCS 770122 Benchtop AC Ionizer is factory
adjusted to provide optimum performance. Further
adjustment in the field is not possible. However, the
following instructions can be followed to determine
whether the Ionizer is performing to specifications. The
testing follows the procedure outlined in the standard
for Ionization, ANSI/ESD STM3.1. Please refer to this
standard for more complete information.
Frequency of recalibration should be based on the
critical nature of those ESD sensitive items handled and
the risk of failure for the ESD protective equipment and
materials. In general, SCS recommends that calibration
be performed annually.
Periodically measure the balance and neutralization
times of the ionizer to verify that it is performing within
specifications. These measurements should be taken
using a charged plate monitor. Calibration should be
performed in accordance with the ESD Association
ionization standard ANSI/ESD STM3.1. With the
ionizer positioned a distance of 12 inches (30 cm), the
neutralization (discharge) time of ±1000V to ±100V
should be less than 2 seconds, and the balance should
be ±15V or better.
Neutralization (Discharge) Times
The comparative efficiency of bench top ionizers is
determined by a standard test published by the ESD
Association: ANSI/ESD STM3.1. Typical positive and
negative decay times (±1000V to ±100V) measured
using this standard are shown in Figure 5.
NOTE: All discharge times are in seconds and
representative only. They are not a guarantee. The
discharge times were recorded in a factory ambient
environment.
TP1 + >60
- >60
12" 12" 12"
12"
12"
TP4 +31.4
-52.1
TP7 +11.4
-13.8
TP10 +12.9
-14.8
TP2 +1.7
-1.9
TP5 +2.2
-2.7
TP8 +3.7
-4.6
TP11 +5.7
-6.6
TP3 + >60
- >60
TP6 + >60
- >60
TP9 +25.2
-29.6
TP12 +14.6
-18.2
770122 Ionizer
Air Flow
Charged Plate
12"
Figure 5. Neutralization (discharge) times in seconds at high fan speed

TB-9116 Page 5 of 5 © 2023 DESCO INDUSTRIES INC
Employee Owned
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: [phone] | West: [phone] • Website: StaticControl.com
Limited Warranty, Warranty Exclusions, Limit
of Liability and RMA Request Instructions
See the SCS Warranty -
StaticControl.com/Limited-Warranty.aspx
Specifications
Input Voltage and
Frequency
(External Adapter)
Power Input:
100-240 VAC, 50/60 Hz
Power Output:
24 VDC, 1 A
Power Adapter Cable Length:
8.0' (2.5 m)
Operating Environment 32° to 104° F (0° to 40° C)
20 to 75% R.H.
Neutralization
(Discharge) Time at 12"
< 2 seconds
O󰀨set Voltage
(Balance) at 12"
±15 V typical
Ion Emission High frequency AC
Airow 78 to 145 CFM
(2.2 to 4.1 m³/min)
Ozone <0.04 ppm
Emitter Points Tungsten
Dimensions
(without stand)
7.5" H x 5.6" W x 3.5" D
(190 mm x 143 mm x 90 mm)
Weight 3.1 lbs (1.4 kg)
Alarm Signal Output 24 VDC
Certications CE, UKCA
Country of Origin China