Desco 19587 Service manual

TB-2079 February 2010 Page 1 of 4
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com
TECHNICAL BULLETIN TB-2079
Made in America
Figure 1. Ion Python Hand Gun (Controller with Hose)
Description
The Desco Ion Python Neutralizing Hand Gun is a ready-to-use
unit designed for use in applications and areas where static can
create manufacturing or handling problems. These units quickly
and effectively neutralize bulk static charges and aid in controlling
contamination by dislodging dust and debris attracted by static
electricity. Airflow may be easily adjusted from a gentle stream to
a powerful blast. These units are designed for use in applications
and areas where ElectroStatic Attraction contamination create
manufacturing or handling problems (Ref: ESD Handbook
TR 20.20 paragraph 5.3.6.5.2.4 Point of Use Ionization). The
Ion Python meets or exceeds the recommended technical
requirements of ANSI/ESD S20.20 tested in accordance with
ANSI/ESD S3.1.
Ionizers are useful in preventing electrostatic charge generation,
ElectroStatic Discharge, ElectroStatic Attraction, as well as
preventing equipment latch-up and safety related shock. ANSI/
ESD S20.20 Paragraph 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.” 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 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.
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: IEC
61340-5-2:1 paragraph 5.2.9).
The Ion Python Neutralizing Hand Gun is NIST calibrated. They
come equipped with universal IEC cord connectors.
Neutralizing Ion Python Hand Gun
Operation and Maintenance
NOTE: These units are not recommended for continuous use.
IONIZER SELECTION
ANSI/ESD S20.20 paragraph 6.1.1.2. 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.
Air Requirements
Always supply the Ion Python Hand Gun with filtered, dry
noncombustible gases, such as compressed shop air or nitrogen.
(If nitrogen is used, the tip will need to be replaced and the unit
recalibrated. This MUST be done by the factory. Contact customer
service at 909-627-8178). If the air is not dry, damage to the
equipment may result and the warranty will be voided. Dirty air
can introduce moisture and oil, contaminating the units’ emitter
assembly along with the materials to be cleaned or neutralized.
Filters must therefore be used at all times upstream of the air
nozzle. A water trap-type pre-filter should be used in conjunction
with an oil coalescing-type filter. Also drain all moisture traps
regularly to prevent moisture in the line. Several drainings per day
may be necessary, especially in areas of high humidity.
The Neutralizing Ion Python Hand Gun may be operated over a
range of 30 PSI to 100 PSI. The specific pressure needed will
depend upon the application. Pressures exceeding 100 PSI are
not recommended since these higher pressures are detrimental
to effective ion production. An air pressure setting of 60 PSI is
recommended. Use the needle valve located on the back of the
controller to properly adjust the air flow.
Air Supply Connection
Turn off air at regulator (or compressor). Insert the brass male
connector (1/4” tubing to 1/8” pipe thread) into an available port
on the regulator. If all ports are being used, a “T” or “+” may be
added to create more ports. Connect the 1/4” tubing to the male
connector on the needle valve on back side of the unit, following
the instructions given below.
To connect tubing or filter to quick connect fitting:
Cut end of plastic tubing square and clean. Push against the collar
with thumbnail. While holding collar in, push tubing into the fitting
until it bottoms out completely.
To release tubing or filter from quick connect fitting:
Push against the collar with thumbnail. While holding collar in,
push tubing inward slightly, then pull tubing out.
MODEL STYLE VOLTAGE AC IEC CORD
19587 Hand Gun 120 Yes
19588 Hand Gun 220 No
© 2010 DESCO INDUSTRIES INC.
Employee Owned

TB-2079 Page 2 of 4
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com
IMPORTANT NOTE: User should exercise caution when using
any compressed air device.
Figure 2. Connecting the optional filter. (Available as item #60355)
Electrical Requirements
The Ion Python and Neutralizing Hand Gun must be connected to
a properly grounded receptacle for the units to operate properly. It
is recommended that the AC outlet be checked for proper wiring
and grounding.
Do not under any circumstances remove the ground pin from
the plug of these units.
NOTE: Grounding of these units is necessary not only
to ensure that they operate properly, but to eliminate the
possibility of an electrical shock.
Operation
Turn on unit with switch on the front panel. The green light
indicates that the air nozzle is ready for use. Point nozzle at object
to be cleaned or neutralized.
For the Neutralizing Hand Gun, push button on the nozzle body
to initiate the flow of air and neutralizing ions. Best results are
normally obtained when holding the nozzle within 2 or 3 feet of the
item being neutralized; hold the nozzle closer when required.
NOTE: Unit is not designed for continuous duty.
A needle valve is located on the back of the unit for fine
adjustments to the air flow, or for shutting off the air to the nozzle.
Airflow on the unit can be adjusted from a gentle blow to a strong
blast, allowing for use in most applications. Do not obstruct the
air jet with fingers or other objects. Do not force any object into
the air jet hole; this action can easily damage the emitter pin and
prevent the controller from producing the ionization necessary for
neutralizing static charges.
The ion balance is affected by many factors, such as distance, air
flow, humidity, and emitter contamination. Therefore, before using
this device around components and assemblies which are highly
sensitive to ESD, it is recom mended that the user thoroughly
evaluate the application prior to its use. Avoid sharply bending or
crushing the black convoluted tubing under feet, rolling chairs or
other furniture.
IMPORTANT NOTE: These air nozzles are not explosion proof.
Do not use in environments where volatile materials are
present.
Desco solid-state electronic equipment is compact and rugged but
should be treated as sensitive electronic equipment. With proper
installation and a continued preventive maintenance program you
will ensure the proper performance of the unit.
Theory of Operation
The Ion Python and Neutralizing Hand gun employ high voltage
AC to create a balanced ion field. AC systems utilize emitters
that are switched rapidly between positive and negative high
voltage, usually at the power line frequency (50/60 Hz). The
emitter is located at the end of the nozzle. This emitter produces
large amounts of positive and negative ions, which mix with the
air supply and create a highly effective neutralizing field. Any
material within this field will be neutralized rapidly. The air nozzles
also eliminate contamination by dislodging dust and debris
which is attracted to a material’s surface by static charges. Once
static charges are neutralized, dust particles and other forms of
contamination are freed and carried away by the air stream. Desco
ionizers meet the ANSI/ESD S20.20 minimum recommended
technical requirement range of less than ±50 volts voltage offset
tested in accordance with ANSI EOS/ESD S3.1. Air Nozzle
Ionizers provide ±20 volt balance.
Maintenance
“As with all ionizers, periodic maintenance will be needed to
provide optimum performance.” (Reference: IEC 61340-5-2:1
paragraph 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.
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 6.1.3.1 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 6.1.3.2. 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.”
Under normal conditions, the ionizer will attract dirt and dust
(especially on the emitter electrodes). To maintain optimum
performance, cleaning must be performed on a regular basis. The
electrodes should be cleaned at least every six months. However,
more frequent cleaning may be required if used in environments
with more contaminants.
Air supply
conection
Needle
valve
Figure 3. Airflow adjustment valve.
© 2010 DESCO INDUSTRIES INC.
Employee Owned
Filter (when used)

TB-2079 Page 3 of 4
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com
air volume or a brownish color to the filter. If either of these
conditions exist, you should replace the filter by unsnapping
connectors. Depress air line connectors allowing removal of filter.
The filter replacement is sold as Desco Item #60355 (two filters to
a package). Be sure to observe the flow direction on filter when
installing a replacement.
Installation of the Controller and
Ion Python Attachment
The mounting slots on the bottom of the controller allow for easy
mounting of the base. Install screws either on a wall or bench.
Using the mounting slots, place controller on the screws for secure
mounting of the unit. Mounting the controller underneath a bench
or on a wall saves valuable bench space. After mounting the unit,
a locking screw is provided on the back of the unit to prevent
accidental removal.
Figure 7. Installing controller to bench.
Neutralization Efficiency (Decay Time)
The comparative neutralization efficiency of ionizers is determined
by a standard test published by the ESD Association Standard
3.1. The decay rates measured using this standard are shown
in the chart below. This performance was measured with the air
nozzle at a distance of 6” from the charged plate and utilizing an
air pressure of 30 PSIG.
Decay Rate per EOS/ESD S-3.1
Test Pressure Decay Rate
30 PSI 2 seconds
Charge Decay Time Constants
Notes: 1) Decay times are from 1,000 volts to 100 volts.
2) The air nozzle’s air stream is
perpendicular to the charged plate.
These units need very little maintenance. In order to maintain
the optimum performance of your unit, the following maintenance
procedures must be performed on a regular basis.
Make sure that the air supply is clean and free of contamination
and moisture. Drain compressor tank and filters periodically.
The filters may require
draining several times
daily, depending on your
compressed air system.
The fuse may be replaced
by removing the power
cord at the back of the
unit and opening the fuse
box at the IEC receptacle.
The controller uses a 1
amp fast acting fuse. For
safety, do not use other
ratings.
Figure 4. Replacing the fuse.
Do not attempt to perform any repairs or adjustments on your
Desco equipment except for those covered in the operation
manual. Self-made repairs could create a hazard and will void the
warranty.
Replacing the Air Nozzle Assembly
The air nozzle and hose assembly is designed to be removed or
replaced by the user in the event of damage or wear. To replace
the assembly, simply unscrew the collar at the base of the hose
and gently disconnect the connector from the receptacle.
To replace the nozzle assembly simply repeat the process in
reverse.
NOTE: Make sure the fittings inside the connector are properly
aligned with their receptacles before tightening the threaded collar.
Replacing the Air Filter of the Ion Python
Periodic replacement of the air filter is recommended for
optimum performance of the ionizer. Compress outer sleeving
away from the filter housing. Examine the filter for any evidence
of contamination. The filter will turn red if there is any oil
contamination. If there has been moisture build-up, there will be a
change in
Locking screw inside unit
helps secure Python Controller
ION
PYTHON
CONTROLLER
© 2010 DESCO INDUSTRIES INC.
Employee Owned
Depress
to release
Nozzle
Charged Plate
Figure 5. Replacing air nozzle assembly
Figure 6. Air filter replacement.
Figure 9. EOS/ESD S-3.1 decay time test set up.

TB-2079 Page 4 of 4
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com
Testing and Calibration
Test using a version of EOS/ESD STM3.1. Observe and record
offset voltage (float voltage) in voltage, measure of discharge
time for +1000volts to +100volts and -1000volts to -100volts in
seconds.
Equipment and tools used:
- Charged Plate Monitor (CPM)
- Medium sizes insulative flat head screw driver
Set-up:
1. Refer to EOS/ESD STM3.1, 6.4 Compresses gas ionizers -
guns and nozzles. Test should be performed on static
dissipative worksurface. Testing technician and worksurface
needs to be properly grounded.
2. Refer to figure 14 - Test location for compressed gas - Guns or
nozzles on page 13. CPM needs to be 6” from the center of the
CPM plate to worksurface. Tip of air nozzle needs to be at 6”
away from surface of CPM plate.
Testing:
Lab environment should be at 75°F at +/-5°F, relative humidity at
45% at +/-5% RH. Observe offset voltage for no less than 10sec
before recording.
Adjustment
Adjustments to the offset voltage could be made by using an
insulative flat head screw. Balancing pot is location on the side of
controller, where the white plastic cap is covering it.
Specifications
Input Voltage:
19587 120 VAC, 50/60 Hz
19588 220 VAC, 50/60 Hz
Amperage standby: <50 milliamps
Amperage in use: <400 milliamps
Fuse: 2ea 1 amp, 5 x 20mm, fast acting
Power Usage: 2.5 watts on, 25 watts in use
Power Cord:
19587 Cord set with IEC connector
19588 Not included
Air Gun: Two-piece molded ABS
Hose Length: 7 feet
Control Box: 5 1/8”H x 6 3/8”W x 7 1/8”L
Weight: 11 pounds
Air Usage: 3.5 CFM @ 30 PSI
Recommended PSI: 30 PSI to 100 PSI
Air fittings: 1/4” OD tubing with 1/8” NPT
with adjustable needle valve.
Health
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.
• Indoor use
• Altitude up to 2000m
• Temperature 5°C to 40°C
• Maximum relative humidity 80% for temperatures up to
31°C decreasing linearly to 50% relative humidity at 40°C
• Mains supply voltage fluctuations up to ±10% of the nominal
voltage
• Transient overvoltages typically present on the mains supply
• Applicable rated pollution degree is 2
• Degree of ingress protection is IP10
Adjustment screw
© 2010 DESCO INDUSTRIES INC.
Employee Owned
MFG Specifications Recorded Values
Offset voltage
(floating voltage) in
voltage
+/-25 volts
Discharge time,
+1000volts to
+100volts in seconds
2 sec or less
Discharge time,
-1000volts to
-100volts in seconds
2 sec or less
Limited Warranty
Desco expressly warrants that for a period of one (1) year from the date of purchase, Desco
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 purchase 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 a Return Material Authorization (RMA) and proper shipping instructions and
address.
Warranty Exclusions
THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT
WARRANTIES, EXPRESSED AND IMPLIED, INCLUDING MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY 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 determine the suitability of the product for
their intended use, and users assume all risk and liability whatsoever in connection therewith.
Figure 10. Balance Adjustment.

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