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© 2021 DESCO INDUSTRIES INC

Employee Owned

SCS - 926 JR Industrial Drive, Sanford, NC 27332

East: (919) 718-0000 | West: (909) 627-9634 • Website: StaticControl.com

Calibration

The SCS Ion Pro™ Benchtop Ionizer is factory adjusted to provide optimum performance. Further adjustment in

the field is not possible. However, the following instructions can be followed to determine whether the Ionizer is

performing to specifications. The testing follows the procedure outlined in the standard for Ionization, ANSI/ESD

STM3.1. Please refer to this standard for more complete information.

Frequency of recalibration should be based on the critical nature of those ESD sensitive items handled and the

risk of failure for the ESD protective equipment and materials. In general, SCS recommends that calibration be

performed annually.

Periodically measure the balance and neutralization times of the Bencthop Air Ionizer to verify that it is performing

within specifications. These measurements should be taken using a charged plate monitor. Calibration should

be performed in accordance with the ESD Association ionization standard ANSI/ESD STM3.1. With the ionizer

positioned a distance of 12 inches (30 cm), the neutralization (discharge) time of ±1000V to ±100V should be less

than 1.5 seconds, and the balance should be ±3V or better.

Neutralization (Discharge) Times

The comparative efficiency of bench top ionizers is determined by a standard test published by the ESD

Association: ANSI/ESD STM3.1. Typical positive and negative decay times (±1000V to ±100V) measured using this

standard are shown in the figure below.

NOTE: All discharge times are in seconds and representative only. They are not a guarantee. The discharge times

were recorded in a factory ambient environment.

TP1

+ >60

- >60

12"

12"

12"

12"

12"

TP4

+28.3

-38.9

TP7

+17.9

-21.7

TP10

+25.7

-26.7

TP2

+1.0

-1.2

TP5

+2.9

-3.6

TP8

+5.3

-6.3

TP11

+8.5

-10.6

TP3

+ >60

- >60

TP6

+60.0

-59.4

TP9

+17.8

-32.5

TP12

+21.8

-22.0

Ion Pro™

Benchtop Ionizer

Air Flow

Charged Plate

12"

Figure 7. Neutralization (Discharge) Times at 120VAC / 220VAC, 60Hz input