For installed-floor acceptance, ANSI/ESD STM7.1-2020 requires at least five resistance-to-ground tests and at least five point-to-point tests per contiguous flooring system area (one continuous area), or at least five of each per 500 square meters, whichever is greater. The minimum applies to each measurement type separately: five resistance-to-ground readings and five point-to-point readings.
STM7.1-2020 is an ESD Association standard test method (STM) for electrostatic discharge (ESD) flooring, approved by the American National Standards Institute (ANSI).
| Surface | Minimum tests for each resistance measurement |
|---|---|
| Flooring system | At least five tests in different locations per contiguous flooring system area, or at least five tests per 500 square meters of flooring system area, whichever is greater |
| Static control floor mats | At least one test per 2 square meters |
The minimum applies to each measurement separately
STM7.1-2020 states the minimum separately in section 6.2.1.7 for resistance-to-ground testing and section 6.2.2.7 for point-to-point testing. Where the five-test minimum applies, that means at least ten resistance readings in total: five resistance-to-ground readings and five point-to-point readings.
Frequently Asked Questions
For resistance-to-ground testing and for point-to-point testing, STM7.1-2020 requires at least five tests in different locations per contiguous flooring system area or at least five tests per 500 square meters, whichever is greater. The minimum applies separately to each measurement type.
For product acceptance of static control floor mats, STM7.1-2020 requires at least one test per 2 square meters for resistance-to-ground testing and separately for point-to-point testing.