A calibration certificate does not, by itself, establish that a resistance meter can perform the measurements required by a facility’s ESD compliance verification plan. The meter must also have the measuring range, test voltages and other capabilities required by the applicable method.
Before testing, Craftsman Concrete reviews the meter’s calibration documentation, the facility’s testing requirements and the site conditions, including temperature, humidity and potential contamination. Craftsman confirms that the equipment’s resistance range, test voltages and operating limits are suitable for the planned work, then verifies the meter, electrodes and leads using the applicable procedure. These checks apply to flooring installed by Craftsman and other contractors.
What S20.20 requires
Equipment must support the planned measurements
ANSI/ESD S20.20-2021 requires the selected test equipment to be capable of making the measurements defined in the compliance verification plan (section 7.4). A note explains that calibration certificates do not ensure this capability.
Calibration documentation and suitability for the planned test therefore need to be considered separately.
What to check beyond the certificate
Meter specifications and the complete setup
Check that the meter’s resistance range and test voltages meet the applicable method. Also verify that the assembled meter, electrodes and leads can perform the planned measurements.
ANSI/ESD STM97.1-2025 Annex A addresses verification of the meter and complete setup. ESD TR53-01-22 Annex G provides a separate apparatus-verification procedure using known resistors. Use the procedure applicable to the testing being performed.
Frequently Asked Questions
Craftsman reviews calibration records, the required measurements and site conditions, including temperature, humidity and potential contamination. It confirms that the equipment’s range, test voltages and operating limits suit the planned work, then verifies the meter, electrodes and leads using the applicable procedure. These checks apply to flooring installed by Craftsman and other contractors.
No. ANSI/ESD S20.20-2021 distinguishes calibration documentation from equipment capability. The selected equipment must be capable of making the measurements defined in the facility’s compliance verification plan (section 7.4).