TB-3043
Page 4 of 6
© 2019 DESCO INDUSTRIES INC
Employee Owned
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
TP1
+15.0
-24.0
12"
12"
12"
12"
12"
TP4
+7.0
-10.0
TP7
+7.5
-10.5
TP10
+9.5
-13.5
TP2
+1.0
-1.4
TP5
+2.3
-3.3
TP8
+3.6
-5.1
TP11
+5.5
-7.6
TP3
+26.0
-52.0
TP6
+10.0
-13.0
TP9
+8.5
-11.0
TP12
+9.5
-13.0
High Output
Bench Top Ionizer
Air Flow
Charged Plate
12"
Figure 5. Neutralization (Discharge) Times at 120VAC / 220VAC, 60Hz input
Neutralization (Discharge) Times
All data was taken with the fan speed set to high. All time measurements are in seconds.
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.
The comparative efficiency of bench top ionizers is determined by a standard test published by the ESD Association: ANSI/
ESD STM 3.1. Typical positive and negative decay times (1000V - 100V) measured using this standard are shown in the
figures below. The performance of the ionizer was measured with the unit positioned as shown, with the fan speed on high
and without a filter.
