Desco 19493 Operation And Maintenance

Ionization Test Kit
Operation and Maintenance
Figure 1. Desco 19493
Description
The Desco Ionization Test Kit allows the
Static Field Meter to be used to measure the offset
voltage (balance) and charge decay of ionization
equipment. The Test Kit also includes a Charger used to
place a ±1000V charge on the
making it possible to also measure the discharge times
of air ionization equipment per ANSI/ESD SP3.3 Periodic
Verification of Air Ionizers. The
includes the 19492 Digital Static Field Meter, providing a
highly portable and cost effective means of verifying the
performance of a wide variety of ionization equipment.
Note: The Digital Static Field Meter is designed to
operate only with the
compatible with other brands.
Although not as accurate, the Desco Ionization Test Kit
has been designed to make measurements that
correspond to those made by using a charged plate
analyzer and ANSI/ESD S3.1. The Ionization Test Kit
provides convenience and portability to test per ANSI/
ESD SP3.3 Periodic Verification of Air Ionizers or
Compliance Verification ESD TR53. We recommend
the EMIT 50571 Charged Plate Analyzer if precise
measurements are required.
The Ionization Test Kit includes a slide-on isolated
Conductive Plate, a ±1000 volt Charger and a durable
thermoplastic carrying case with custom cut-outs for all
of the above components along with the Digital Static
Field Meter.
TB-3041 Page 1 of 6 April 2018
TECHNICAL BULLETIN TB-3041
Ionization Test Kit
19492
19441 Conductive Plate,
19493 Ionization Test Kit
19493 Ionization Test Kit. It is not
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
"When any object becomes electrostatically charged,
there is an electrostatic field associated with that charge.
If an ESDS (ESD sensitive) device is placed in that
electrostatic field, 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 field and grounded
again, a second CDM event will occur as charge (of
opposite polarity from the first event) is transferred from
the device." (Handbook ESD TR20.20 section 2.7.5 Field
Induced Discharges)
"All nonessential insulators such as coffee cups, food
wrappers and personal items shall be removed from the
EPA.
The ESD program shall include a plan for handling
process-required insulators in order to mitigate
field-induced CDM damage.
If the field measured on the process required insulator
Digital
is greater than 2000 volts/inch and the process required
insulator is less than 30 cm (12 inches) from the ESDS
item, steps shall be taken to either:
A) Separate the required insulator from the ESDS item
by a distance of greater than 30 cm (12 inches); or
B) Use ionization or other charge mitigating techniques
to neutralize the charge.
If the field measured on the process required insulator
is greater than 125 volts/inch and the process required
insulator is less than 2.5 cm (1 inch) from the ESDS
item, steps shall be taken to either:
A) Separate the required insulator from the ESDS item
by a distance of greater than 2.5 cm (1 inch); or
B) Use ionization or other charge mitigating techniques
to neutralize the charge.
NOTE: The accurate measurement of electrostatic fields
requires that the person making the measurement is
familiar with the operation of the measuring equipment.
Most hand held meters require that the reading be taken
at a fixed distance from the object. They also normally
specify that the object has a minimum dimension of
fixed size in order to obtain an accurate reading." (ANSI/
ESD S20.20-2014 section 8.3.1 Insulators)
Made in the
United States of America
Desco.com
© 2018 DESCO INDUSTRIES, INC.
Employee Owned