Grass Valley K2 System Guide v.9.0 - Manual (Page 22)

Grounding Requirements for Personnel
The information in this section is provided to assist you in selecting a grounding method. This
information is taken from ANSI/ESD S20.20-2007 (Revision of ANSI/ESD S20.20-1999).
Product Qualification
Required Limits Test Method Personnel Grounding Technical
Requirement
< 3.5 x 10
7
ohm ANSI/ESD S1.1 (Section 5.11) Wrist Strap System*
< 3.5 x 10
7
ohm ANSI/ESD STM97.1 Flooring / Footwear System –
Method 1
< 10
9
ohm ANSI/ESD STM97.
1ANSI/ESD STM97.2 Flooring / Footwear System –
Method 2 (both required)
< 100 V ANSI/ESD STM97.2
Product qualification is normally conducted during the initial selection of ESD control products and
materials. Any of the following methods can be used: product specification review, independent
laboratory evaluation, or internal laboratory evaluation.
Compliance Verification
Required Limits Test Method Personnel Grounding Technical
Requirement
< 3.5 x 10
7
ohm ESD TR53 Wrist Strap Section Wrist Strap System*
< 3.5 x 10
7
ohm ESD TR53 Flooring Section and
ESD TR53 Footwear Section Flooring / Footwear System –
Method 1
< 1.0 x 10
9
ohm ESD TR53 Flooring Section and
ESD TR53 Footwear Section Flooring / Footwear System –
Method 2 (both required)
* For situations where an ESD garment is used as part of the wrist strap grounding path, the total
system resistance, including the person, garment, and grounding cord, must be less than 3.5 x 10
7
ohm.
22 K2 System Guide 06 November 2012
Safety Summaries