DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
TB-3031
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© 2014 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. The distance between the
overhead ionizer and charged plate is 18" per ANSI/ESD STM 3.1.
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.
TP1
+10.4
-11.8
16"
16"
12"
12"
Charged Plate
16"
Neutralization (Discharge) Times at 100VAC, 50Hz input
TP4
+3.4
-3.7
TP7
+3.3
-3.6
TP10
+9.1
-9.7
TP2
+4.1
-4.8
TP5
+2.0
-2.3
TP8
+2.2
-2.7
TP11
+3.4
-3.9
TP3
+7.5
-8.4
TP6
+2.6
-3.2
TP9
+3.0
-3.9
TP12
+7.0
-9.1
