Grass Valley Maestro Master Control Installation v.2.4.0 - Manual (Page 33)

MAESTRO — Installation and Service Manual 33
ESD Protection
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 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.
* 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.
Table 1. Product Qualification
Personnel Grounding Technical
Requirement
Test Method Required Limits
Wrist Strap System* ANSI/ESD S1.1 (Section 5.11) < 3.5 x 10 7 ohm
Flooring / Footwear System – Method 1 ANSI/ESD STM97.1 < 3.5 x 10
7
ohm
Flooring / Footwear System – Method 2
(both required) ANSI/ESD STM97.1
ANSI/ESD STM97.2
< 10 9 ohm
< 100 V
Table 2. Compliance Verification
Personnel Grounding Technical
Requirement
Test Method Required Limits
Wrist Strap System* ESD TR53 Wrist Strap Section < 3.5 x 10 7 ohm
Flooring / Footwear System – Method 1 ESD TR53 Flooring Section and ESD
TR53 Footwear Section < 3.5 x 10 7 ohm
Flooring / Footwear System – Method 2
(both required) ESD TR53 Flooring Section and ESD
TR53 Footwear Section < 1.0 x 10 9 ohm