SCS 770716 Installation guide

SCS - 926 JR Industrial Drive, Sanford, NC 27332
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Employee Owned
Static Sensor & Air Ionizer Test Kit
Operation and Maintenance
Description
The SCS 770716 Static Sensor indicates surface
voltage and polarity on objects. The meter has a
measurement range of 0 to ±19.99 kV at a distance of
1 inch and a measurement accuracy of ±5%. It utilizes
a chopper-stablized sensor for use in both normal
and ionized environments. The meter’s enclosure is
dissipative and features a 7 mm snap and ground
cord for bonding to equipment ground. A rotary zero
knob sets the zero-reference point with finely tuned
precision, and a Hold button allows the user to “freeze”
a displayed measurement for evaluation. A LED range
indicator assists with placing the meter at the correct
distance from the object being measured.
The SCS 770717 Air Ionizer Test Kit includes and
utilizes the 770716 Static Sensor to measure the o󰀨set
voltage (balance) and charge decay of ionization
equipment. The Air Ionizer Test Kit also includes
a charger used to place a ±1000V charge on the
conductive plate, making it possible to also measure the
discharge times of air ionization equipment per ANSI/
ESD SP3.3 Periodic Verication of Air Ionizers.
Although not as accurate, the SCS Air Ionizer Test Kit
is designed to make measurements that correspond
to those made by using a charged plate monitor and
ANSI/ESD STM3.1. The Air Ionizer Test Kit provides
convenience and portability to test per ANSI/ESD SP3.3
Periodic Verication of Air Ionizers or Compliance
Verication ESD TR53. SCS recommends using the
770004 or 770005 Charged Plate Analyzer if precise
measurements are required.
All Static Sensors and Air Ionizer Test Kits are
calibrated to NIST standards and include a certificate.
“When any object becomes electrostatically charged,
there is an electrostatic eld associated with that charge.
If an ESDS (ESD sensitive) device is placed in that
electrostatic eld, a voltage may be induced on the
device. If the device is then momentarily grounded, a
transfer of charge from the device occurs as a CDM
(Charged Device Model) event. If the device is removed
from the region of the electrostatic eld and grounded
again, a second CDM event will occur as charge (of
opposite polarity from the rst event) is transferred from
the device.” (Handbook ESD TR20.20 section 2.7.5 Field
Induced Discharges)
The Static Sensor, Air Ionizer Test Kit, and its
accessories are available as the following item numbers:
Item Description
770716 Static Sensor
770717 Air Ionizer Test Kit
770719 Conductive Plate and Charger
770009 Carrying Case for Air Ionizer Test Kit
September 2021
Made in the
United States of America
USER GUIDE TB-9111
Figure 1. SCS 770716 Static Sensor
Figure 2. SCS 770717 Air Ionizer Test Kit

SCS - 926 JR Industrial Drive, Sanford, NC 27332
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Employee Owned
Packaging
770716 Static Sensor
1 Static Sensor
1 Coiled Ground Cord, 12' length
1 9V Alkaline Battery
1 Certicate of Calibration
770717 Air Ionizer Test Kit
1 Static Sensor
1 Conductive Plate
1 Charger
1 Coiled Ground Cord, 12’ length
2 9V Alkaline Battery
1 Carrying Case
1 Certicate of Calibration
770719 Conductive Plate and Charger
1 Conductive Plate
1 Charger
1 9V Alkaline Battery
1 Carrying Case
Features and Components
Static Sensor
Figure 4. Static Sensor features and components
C
B
Figure 3. Air Ionizer Test Kit and Carrying Case
A. Display: Displays the measured value in kV/inch.
B. Rotary Zero Knob: Sets the 0 volt reference point.
C. Power Switch: Slide to the left to power the meter o󰀨.
Slide to the right to power the meter on.
D. Measure/Hold Pushbutton Switch: Press the
pushbutton to display live measurements. Release the
pushbutton to freeze the measurement on the display.
The red LED above the pushbutton will illuminate when
HOLD is enabled.
E. 7 mm Ground Snap: Connect the included 7 mm
coiled ground cord here to ground the meter.
F. Battery Cover: Slide the cover down to open the 9V
battery compartment.
F
A
D
E

SCS - 926 JR Industrial Drive, Sanford, NC 27332
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Operation
Static Sensor
NOTE: The Static Sensor’s enclosure is conductive. The
instrument senses the di󰀨erence in potential between
the enclosure and the tested surface. The meter must
be grounded by either the hand of a grounded operator
or the included coiled ground cord to achieve accurate
measurements.
Zeroing the Static Sensor
Slide the power switch to the right to power the Static
Sensor. Point the top of the Static Sensor approximately
1 inch (2.5 cm) away from a grounded metal surface.
Proper spacing is indicated when the two red bullseyes
emitted LED range indicator become centered on top
of each other. Turn the rotary zero knob until the Static
Sensor’s display reads 0.00.
Charger
Figure 5. Charger features and components
A
B
C
D
A. Output Contact: The output contact is connected to
an internal power source. When the touch plate located
underneath the unit is connected to ground, the output
contact will provide a charge of the indicated polarity.
The charger is designed so that an operator can press
the rocker switch and touch the plate simultaneously
with the ngers of the same hand.
B. Rocker Switch: Press and hold to select the polarity
that will be provided at the Output Contact.
C. Touch Plate: Make contact with the touch plate while
pressing down the rocker switch to provide voltage to the
Output Contact. The operator must be properly
grounded during use.
D. Battery Compartment: Slide the cover down to open
the 9V battery compartment.
Figure 6. Pointing the Static Sensor to a grounded
surface

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Performing a Measurement
Use the LED range indicator to position the top of the
Static Sensor 1 inch (2.5 cm) from the object to be
measured. The Static Sensor will display a reading (from
0 to ±19.99) of the electrostatic eld in kilovolts per inch.
NOTE: The display will indicate “1” or “-1” when the
Static Sensor is over-ranged. Change the range of the
unit if necessary. If the measurement exceeds 20 kV,
move the Static Sensor farther away from the object and
multiply the reading by the distance (in inches) away
from the object being measured. The measurement
accuracy is dependent on a stable ground reference
and the 1 inch measuring distance. It is also dependent
on the “aspect ratio”, relating the size of the object to be
measured to the measurement distance.
NOTE: This aspect ratio should be at least 3 for best
accuracy. In other words, the object should be at
least a 3 inch square when measuring at a 1 inch
distance. Accurate measurements may be made at
other measurement distances by scaling the Static
Sensor range and observing the proper aspect ratio.
For example, at a measurement distance of 3 inches,
multiply the Static Sensor reading by 3 to give a range
of 0 to 60 kilovolts. For accuracy, the object being
measured at this distance should be at least a 9 inch
square.
Holding the Last Reading
With the Static Sensor positioned 1 inch (2.5 cm) from
the object being measured, press the red pushbutton
switch into the HOLD position. This will freeze the
measurement on the display and illuminate the red LED
located above the pushbutton switch. This feature allows
the operator to move the Static Sensor where it may be
more easily read or saved for later reference.
NOTE: The LED range indicator will disable while the
Static Sensor is in HOLD mode. Use the HOLD feature
between measurements to prolong the battery’s life.
Air Ionizer Test Kit
Performing O󰀨set Voltage (Balance) Measurements
The Air Ionizer Test Kit has been designed to match the
compact size and hand held convenience of the Static
Sensor. Use the following procedure to verify the
o󰀨set voltage (balance) of air ionization equipment.
This quick and easy procedure will help determine if
the piece of ionization equipment is working within the
manufacturer’s specications or user requirements. It is
extremely important that ionizers be checked regularly
for o󰀨set voltage (balance) and discharge times.
An ionizer operating in an out-of-balance state can
place a charge on sensitive electronic components or
assemblies.
NOTE: The Static Sensor’s enclosure is conductive. The
instrument senses the di󰀨erence in potential between
the enclosure and the tested surface. The meter must
be grounded by either the hand of a grounded operator
or the included coiled ground cord to achieve accurate
measurements.
Installing the Conductive Plate
The Static Sensor’s case has two slots along its sides.
The top slot is closest to the face of the instrument. Slide
down the tabs of the Conductive Plate plate into the top
slot of the Static Sensor’s case as far as they go.
Figure 7. Aligning the two bullseyes emitted by the LED
range indicator

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Zeroing the Static Sensor
Slide the power switch to the right to power the Static
Sensor. Make contact between the top of the Conductive
Plate and a grounded surface. Turn the rotary zero knob
until the Static Sensor’s display reads 0.00.
Performing a Measurement
Locate the Test Kit in an ionized environment at the
appropriate distance from the device under test. The
static eld displayed is the actual balance of the ionizer
or voltage o󰀨set. The display will indicate “1” or “-1”
when the Static Sensor is over-ranged. Change the
range of the unit if necessary.
NOTE: When testing pulsed ionizer systems, the voltage
displayed is constantly changing. This pulse rate may be
faster than the display update rate of the Static Sensor,
therefore the displayed voltage is an average of the
actual voltage. The output of the Static Sensor is useful
in this situation for more accurate measurements.
Holding the Last Reading
Press the red pushbutton switch into the HOLD position.
This will freeze the measurement on the display and
illuminate the red LED located above the pushbutton
switch. This feature allows the operator to move the
Static Sensor where it may be more easily read or saved
for later reference.
Performing Discharge Time Measurements
In order to verify that an ionizer is operating properly it is
also important that its ability to neutralize or discharge
static electricity is measured. The following procedure
will measure an ionizer’s discharge time:
Operating the Charger
The Charger has a momentary rocker switch that powers
the unit. Holding the switch forward / backward supplies
power to the output terminals.
Polarity Selection
The top of the rocker switch is labeled “+”, and the
bottom is labeled “-”. To provide a POSITIVE voltage
output, touch the plate located underneath the charger,
and press the switch forward at the same time. To
provide a NEGATIVE voltage output, touch the plate
located underneath the charger, and press the switch
downward at the same time.
NOTE: For the Charger to work correctly, the operator
and Static Sensor must be properly grounded. A ground
path to the touch plate must exist.
Ionizer Discharge Time
Use the Static Sensor with the Conductive Plate in the
appropriate location for measurements.
Figure 8. Sliding the Conductive Plate onto the Static
Sensor
Figure 9. Using the Static Sensor with Conductive Plate
to measure the oset voltage of a benchtop ionizer

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Positive Discharge Time Measurements
To provide a POSITIVE voltage output, touch the
plate located underneath the Charger, and press the
switch forward at the same time. Momentarily touch
the Charger’s output terminal to the conductive plate
attached to the Static Sensor. The Static Sensor reads
approximately +1.10 kV. By using a stop watch or
other timing device, determine the time needed for the
voltages to decrease from +1.10 kV to +0.10 kV. This is
the positive discharge time.
Negative Discharge Time Measurements
To provide a NEGATIVE voltage output, touch the plate
located underneath the Charger, and press the switch
downward at the same time. Momentarily touch the
Charger’s output terminal to the conductive plate
attached to the Static Sensor. The Static Sensor reads
approximately -1.10 kV. By using a stop watch or other
timing device, determine the time needed for the
voltages to decrease from -1.10 kV to -0.10 kV. This is
the negative discharge time.
NOTE: A ground path must be provided between the
touch plate of the Charger and the ground reference of
the Static Sensor. This is normally provided by holding
the Charger in one hand and the Static Sensor with
Conductive Plate in the other.
Maintenance
The Static Sensor and Charger are factory calibrated
and no maintenance is required. Contact SCS Customer
Service should the products behave abnormally. Any
unauthorized service will void the warranty and result in
additional repair charges.
NOTE: This Static Sensor is a precision instrument and
should not be subjected to dropping as that would void
the warranty.
Replacing the Battery
The Static Sensor’s battery should be replaced when a
battery symbol appears on the display. The battery in
the Charger should be replaced annually or when it is
unable to provide approximately ±1100V. Always replace
the batteries with a 9V alkaline or equivalent battery.
Cleaning
The area around the aperture of the Static Sensor must
be kept clean to ensure accurate, drift-free readings.
Never touch the aperture. Use low-pressure instrument-
grade air to remove dust or other debris. To remove
more severe contamination, spray or ush with the
smallest practical amount of clean technical-grade of
isopropyl alcohol. Allow the instrument to air dry for
several hours afterward.
Keep the insulators on the Aluminum Conductive Plate
clean and free of contaminates that may cause surface
leakage. To test the performance of the Conductive
Plate, charge the plate and note the discharge rate in
a non-ionized area. The self discharge rate to 10% of
original voltage should be greater than ve minutes.
Figure 10. Using the Charger to apply a charge onto the
Conductive Plate

SCS - 926 JR Industrial Drive, Sanford, NC 27332
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Employee Owned
Calibration
Static Sensor
Routine calibration is not required. There are no user
serviceable parts. Contact SCS Customer Service
should the Static Sensor exhibit any abnormal behavior.
Any unauthorized service will void the warranty and
result in additional repair charges.
Specications
Static Sensor
Performance
Measurement Range 0 to ±19.99 kV / inch
Measurement Accuracy Better than ±5% of reading,
±2 counts
Measurement Stability ±10 counts
Front Panel Meter
Voltage Display 3-1/2 digit LED display
Sampling Rate 3 readings per second
Features
Ranging System LED distance indicator;
aligned targets indicate 1"
Range LED distance indicator
Rotary Zero Knob Sets the zero-reference point
Low Battery Indicator An LCD icon indicates when
the battery is low
Hold Switch Retains the LCD display
reading when depressed
General
Dimensions 0.9" H x 2.8" W x 4.9"L
(24 mm x 70 mm x 126 mm)
Weight 4.9 oz. (140 g) with battery
Operating Conditions
Temperature 50 to 86ºF (10 to 30ºC)
Relative Humidity To 80%, non-condensing
Altitude To 2000 m
Certications CE
Power Requirements
Power One (1) 9-volt alkaline battery
Operating Time Greater than 50 hours,
with a new battery at 21ºC
continuous
Air Ionizer Test Kit
Conductive plate
Assembly
Aluminum bracket, bare
aluminum plate and teon
spacers isolate plate from
bracket
Voltage Output 1/10,000 of measured voltage
Conductive plate Area 2.95" W x 1.18" L
(7.5 x 3.0 cm)
Conductive plate
Assembly Weight
2.4 oz. (68 g)
Charger Dimensions 1.1" H x 2.6" W x 4.5" L
(2.8 x 6.6 x 11.4 cm)
Charger Weight 5 oz. (140 g) with battery
Charger Power
Requirements
One 9-volt alkaline battery
Charger Output (using
Static Sensor with
conductive plate)
1.1 kV minimum for ± voltage
Certications CE
Limited Warranty, Warranty Exclusions, Limit of
Liability and RMA Request Instructions
See the SCS Warranty -
StaticControl.com/Limited-Warranty.aspx